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1 | ############################################################################### |
2 | # |
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3 | # Copyright (c) 2009,2011 GraÅžvydas Ignotas |
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4 | # All rights reserved. |
5 | # |
6 | # Redistribution and use in source and binary forms, with or without |
7 | # modification, are permitted provided that the following conditions are met: |
8 | # * Redistributions of source code must retain the above copyright |
9 | # notice, this list of conditions and the following disclaimer. |
10 | # * Redistributions in binary form must reproduce the above copyright |
11 | # notice, this list of conditions and the following disclaimer in the |
12 | # documentation and/or other materials provided with the distribution. |
13 | # * Neither the name of the organization nor the |
14 | # names of its contributors may be used to endorse or promote products |
15 | # derived from this software without specific prior written permission. |
16 | # |
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17 | # THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND ANY |
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18 | # EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
19 | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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20 | # DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY |
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21 | # DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
22 | # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
23 | # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
24 | # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
26 | # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | # |
28 | # Assemble with gas |
29 | # --register-prefix-optional --bitwise-or |
30 | # |
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31 | |
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32 | .equ USE_VINT, 0 |
33 | .equ COPY_TO_EXP, 1 |
0da5ab5d |
34 | .equ RELOCATE_TO_RAM, 0xff0100 /* addr or 0 to disable */ |
35 | .equ COPY_TEST_CODE, 0 /* addr or 0 to disable, copy only */ |
36 | .equ PC_TRANSFER, 0 |
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37 | |
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38 | .text |
39 | .globl main |
d4279640 |
40 | .globl INT |
1286a1ba |
41 | .globl VBL |
8689c962 |
42 | .globl return_to_main |
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43 | |
44 | ################################################## |
45 | # # |
46 | # Register and bitmask definitions # |
47 | # # |
48 | ################################################## |
49 | |
50 | .equ GFXDATA, 0xc00000 |
51 | .equ GFXCNTL, 0xc00004 |
52 | |
53 | .equ VDP0_E_HBI, 0x10 |
54 | .equ VDP0_E_DISPLAY, 0x02 |
55 | .equ VDP0_PLTT_FULL, 0x04 |
56 | |
57 | .equ VDP1_SMS_MODE, 0x80 |
58 | .equ VDP1_E_DISPLAY, 0x40 |
59 | .equ VDP1_E_VBI, 0x20 |
60 | .equ VDP1_E_DMA, 0x10 |
61 | .equ VDP1_NTSC, 0x00 |
62 | .equ VDP1_PAL, 0x08 |
d90ff128 |
63 | .equ VDP1_MODE5, 0x04 |
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64 | |
fbad1b76 |
65 | .equ VDP12_STE, 0x08 |
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66 | .equ VDP12_SCREEN_V224, 0x00 |
67 | .equ VDP12_SCREEN_V448, 0x04 |
68 | .equ VDP12_PROGRESSIVE, 0x00 |
69 | .equ VDP12_INTERLACED, 0x02 |
70 | .equ VDP12_SCREEN_H256, 0x00 |
71 | .equ VDP12_SCREEN_H320, 0x81 |
72 | |
73 | .equ VDP16_MAP_V32, 0x00 |
74 | .equ VDP16_MAP_V64, 0x10 |
75 | .equ VDP16_MAP_V128, 0x30 |
76 | .equ VDP16_MAP_H32, 0x00 |
77 | .equ VDP16_MAP_H64, 0x01 |
78 | .equ VDP16_MAP_H128, 0x03 |
79 | |
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80 | .equ MMODE_MAIN, 0 |
81 | .equ MMODE_VAL_INPUT, 1 |
82 | .equ MMODE_EDIT_VAL, 2 |
83 | .equ MMODE_GOTO, 3 |
27d5cc88 |
84 | .equ MMODE_START_MENU, 4 |
85 | .equ MMODE_GOTO_PREDEF, 5 |
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86 | .equ MMODE_JMP_ADDR, 6 |
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87 | .equ MMODE_PC, 7 |
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88 | |
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89 | .equ predef_addr_cnt, ((predef_addrs_end-predef_addrs)/4) |
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90 | |
91 | ################################################## |
92 | # # |
93 | # MACROS # |
94 | # # |
95 | ################################################## |
96 | |
97 | |
27d5cc88 |
98 | # Write val to VDP register reg |
99 | .macro write_vdp_r_dst reg val dst |
100 | move.w #((\reg << 8) + 0x8000 + \val),\dst |
4db6e09f |
101 | .endm |
102 | |
27d5cc88 |
103 | # Write val to VDP register reg, vdp addr in a3 |
104 | .macro write_vdp_reg reg val |
105 | write_vdp_r_dst \reg, \val, (a3) |
106 | .endm |
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107 | |
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108 | # Set up address in VDP, control port in dst |
109 | .macro VRAM_ADDR adr dst |
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110 | move.l #(0x40000000 | ((\adr & 0x3fff) << 16) | (\adr >> 14)),\dst |
111 | .endm |
112 | |
113 | .macro VSRAM_ADDR adr dst |
114 | move.l #(0x40000010 | ((\adr & 0x3fff) << 16) | (\adr >> 14)),\dst |
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115 | .endm |
116 | |
117 | |
118 | # make VDP word from address adr and store in d0 |
119 | .macro XRAM_ADDR_var adr |
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120 | move.l \adr,d0 |
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121 | lsl.l #8,d0 |
122 | lsl.l #8,d0 |
123 | rol.l #2,d0 |
124 | lsl.b #2,d0 |
125 | lsr.l #2,d0 |
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126 | .endm |
127 | |
128 | |
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129 | .macro VRAM_ADDR_var adr |
130 | XRAM_ADDR_var \adr |
131 | or.l #0x40000000,d0 |
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132 | .endm |
133 | |
134 | |
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135 | .macro CRAM_ADDR_var adr |
136 | XRAM_ADDR_var \adr |
137 | or.l #0xc0000000,d0 |
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138 | .endm |
139 | |
140 | |
1286a1ba |
141 | # convert tile coords in d0, d1 to nametable addr to a0 |
142 | .macro XY2NT |
143 | lsl.w #6,d1 |
144 | add.w d1,d0 |
145 | lsl.w #1,d0 |
146 | movea.l #0xe000,a0 |
147 | add.w d0,a0 |
148 | .endm |
149 | |
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150 | # check if some d-pad button (and modifier) is pressed |
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151 | .macro do_dpad bit op val |
152 | btst.l #\bit,d0 |
153 | beq 0f |
126ec270 |
154 | \op \val,a6 |
fbad1b76 |
155 | bra dpad_end |
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156 | 0: |
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157 | .endm |
158 | |
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159 | # convert a6 to normal addr |
160 | # destroys d0 |
161 | .macro mk_a6_addr reg |
162 | move.l a6,\reg |
163 | moveq.l #0,d0 |
164 | move.b \reg,d0 |
165 | lsr.l #8,\reg |
166 | add.l d0,\reg |
167 | .endm |
168 | |
169 | .macro change_mode mode_new mode_back |
170 | and.w #0xc0ff,d7 |
171 | or.w #(\mode_back<<11)|(\mode_new<<8),d7 |
172 | .endm |
173 | |
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174 | # destroys a0,d0-d2 |
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175 | .macro menu_text str x y pal |
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176 | lea (\str,pc),a0 |
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177 | move.l #\x,d0 |
178 | move.l #\y,d1 |
179 | move.l #0x8000|(\pal<<13),d2 |
180 | jsr print |
181 | .endm |
182 | |
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183 | ################################################# |
184 | # # |
185 | # DATA # |
186 | # # |
187 | ################################################# |
188 | |
189 | colors: |
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190 | dc.w 0x0000,0x0eee,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
191 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
192 | dc.w 0x0000,0x02e2,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
193 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
194 | dc.w 0x0000,0x0e44,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
195 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
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196 | dc.w 0x0000,0x044e,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
197 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
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198 | colors_end: |
199 | |
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200 | |
201 | sprite_data: |
202 | /* Y size link attr X */ |
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203 | dc.w 0; dc.b 0x05; dc.b 0; dc.w 0x6002; dc.w 0 |
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204 | sprite_data_end: |
205 | |
27d5cc88 |
206 | predef_addrs: |
207 | dc.l 0x000000, 0x200000, 0x400000, 0xa00000, 0xa10000 |
3c2e737f |
208 | dc.l 0xa11100, 0xa12000, 0xa13000, 0xa14000, 0xa15100 |
209 | dc.l 0xc00000 |
27d5cc88 |
210 | predef_addrs_end: |
211 | |
212 | safe_addrs: |
213 | dc.l 0x000000, 0x7fffff |
214 | dc.l 0xe00000, 0xffffff |
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215 | dc.l 0xa00000, 0xa100ff |
216 | dc.l 0xa11000, 0xa113ff |
217 | dc.l 0xa12000, 0xa120ff |
218 | dc.l 0xa13000, 0xa130ff |
27d5cc88 |
219 | safe_addrs_end: |
3c2e737f |
220 | dc.l 0xa15100, 0xa1513f |
221 | safe_addrs_end_32x: |
222 | dc.l 0xa15180, 0xa153ff |
223 | safe_addrs_end_32x_vdp: |
27d5cc88 |
224 | |
6f93f411 |
225 | sizeof_bin: |
226 | dc.l _edata |
227 | |
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228 | txt_edit: |
229 | .ascii "- edit -\0" |
230 | txt_a_confirm: |
231 | .ascii "A-confirm\0" |
27d5cc88 |
232 | txt_about: |
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233 | .ascii "hexed r2\0" |
27d5cc88 |
234 | txt_goto: |
235 | .ascii "Go to address\0" |
236 | txt_goto_predef: |
237 | .ascii "Go to (predef)\0" |
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238 | txt_jmp_addr: |
239 | .ascii "Jump to address\0" |
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240 | txt_dump: |
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241 | .ascii "PC Transfer\0" |
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242 | txt_dtack: |
243 | .ascii "DTACK safety\0" |
8689c962 |
244 | txt_transfer_ready: |
245 | .ascii "Transfer Ready\0" |
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246 | txt_working: |
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247 | .ascii "PC mode \0" |
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248 | txt_dtack_err: |
249 | .ascii "DTACK err?\0" |
250 | txt_exc: |
251 | .ascii "Exception \0" |
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252 | |
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253 | ################################################## |
254 | # # |
255 | # MAIN PROGRAM # |
256 | # # |
257 | ################################################## |
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258 | |
259 | # global regs: |
260 | # a6 = page_start[31:8]|cursor_offs[7:0] |
261 | # d7 = old_inputs[31:16]|edit_bytes[15:14]|g_mode_old[13:11]|g_mode[10:8]|irq_cnt[7:0] |
262 | # d6 = edit_word_save[31:15]|edit_done[7]|no_dtack_detect[4]|autorep_cnt[3:0] |
263 | # d5 = main: tmp |
264 | # edit: edit_word[31:8]|edit_pos[4:2]|byte_cnt[1:0] |
265 | # menu: sel |
266 | |
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267 | .align 2 |
268 | |
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269 | main: |
8689c962 |
270 | /* make sure io port 2 is doing inputs */ |
271 | move.b #0,(0xa1000b).l |
8682b7ce |
272 | /* make sure irqs are masked */ |
1286a1ba |
273 | move.w #0x2700,sr |
8682b7ce |
274 | /* take care of TMSS */ |
275 | move.b (0xa10000).l,d0 |
276 | andi.b #0x0f,d0 |
277 | beq no_tmss |
278 | move.l #0x53454741,(0xa14000).l |
279 | /* want cart, not OS rom if cart pops in */ |
280 | move.w #1,(0xa14100).l |
281 | /* touch VDP after TMSS setup? */ |
282 | tst.w (0xc00004).l |
283 | no_tmss: |
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284 | |
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285 | .if PC_TRANSFER |
f0e06736 |
286 | /* want to do early PC transfer (with RAM/VRAM intact and such)? |
287 | * also give time PC to see start condition */ |
288 | move.l #0x2000,d0 |
289 | 0: dbra d0,0b |
290 | |
291 | move.l #0xa10005,a0 |
292 | btst.b #5,(a0) |
293 | bne no_early_transfer |
f0e06736 |
294 | move.b #0x40,(0xa1000b).l /* port 2 ctrl */ |
295 | move.b #0x00,(a0) /* port 2 data - start with TH low */ |
296 | move.l #0x2000,d0 |
297 | 0: |
298 | btst.b #4,(a0) |
299 | beq do_early_transfer |
300 | dbra d0,0b |
301 | |
f0e06736 |
302 | move.b #0,(0xa1000b).l |
303 | bra no_early_transfer /* timeout */ |
304 | |
305 | do_early_transfer: |
f0e06736 |
306 | bsr do_transfer |
307 | |
308 | no_early_transfer: |
0da5ab5d |
309 | .endif |
f0e06736 |
310 | |
ff17c043 |
311 | .if COPY_TO_EXP |
80560599 |
312 | /* copy to expansion device if magic number is set */ |
313 | move.l #0x400000,a1 |
314 | cmp.w #0x1234,(a1) |
27d5cc88 |
315 | bne 0f |
316 | |
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317 | move.l #0,a0 |
6f93f411 |
318 | move.l (sizeof_bin,pc),d0 |
319 | lsr.l #3,d0 |
80560599 |
320 | 1: |
321 | move.l (a0)+,(a1)+ |
322 | move.l (a0)+,(a1)+ |
323 | dbra d0,1b |
324 | 0: |
325 | .endif |
326 | |
327 | .if RELOCATE_TO_RAM |
ff17c043 |
328 | /* we could be relocated by 32x or something else, adjust start addr */ |
329 | lea (pc),a0 |
330 | move.l a0,d0 |
331 | and.l #0xff0000,d0 |
332 | move.l d0,a0 |
333 | |
80560599 |
334 | /* copy, assume 8K size */ |
0da5ab5d |
335 | move.l #RELOCATE_TO_RAM,a2 |
6f93f411 |
336 | move.l (sizeof_bin,pc),d0 |
0da5ab5d |
337 | move.l a2, a1 |
6f93f411 |
338 | lsr.l #3,d0 |
27d5cc88 |
339 | 1: |
318e20ff |
340 | move.l (a0)+,(a1)+ |
341 | move.l (a0)+,(a1)+ |
27d5cc88 |
342 | dbra d0,1b |
80560599 |
343 | |
0da5ab5d |
344 | lea (0f,pc),a0 |
345 | move.l a0,d0 |
346 | and.l #0x00ffff,d0 |
347 | add.l d0,a2 |
348 | .endif |
349 | |
350 | .if COPY_TEST_CODE |
ff17c043 |
351 | /* copy test code */ |
352 | lea (test_code,pc),a0 |
0da5ab5d |
353 | move.l #COPY_TEST_CODE,a1 |
ff17c043 |
354 | move.w #(test_code_end - test_code)/2-1,d0 |
355 | 1: |
356 | move.w (a0)+,(a1)+ |
357 | dbra d0,1b |
358 | |
ff17c043 |
359 | /* patch test code */ |
0da5ab5d |
360 | move.l #COPY_TEST_CODE,a1 |
ff17c043 |
361 | add.w #(test_code_ret_op-test_code+2),a1 |
0da5ab5d |
362 | move.l a2,(a1) |
363 | .endif |
ff17c043 |
364 | |
0da5ab5d |
365 | .if RELOCATE_TO_RAM |
366 | jmp (a2) |
27d5cc88 |
367 | 0: |
368 | .endif |
369 | |
1286a1ba |
370 | movea.l #0,a6 |
4dfddc2f |
371 | move.l #0x8000,d7 |
fbad1b76 |
372 | moveq.l #0,d6 |
1286a1ba |
373 | |
374 | /* Init pads */ |
375 | move.b #0x40,(0xa10009).l |
376 | move.b #0x40,(0xa10003).l |
377 | |
4db6e09f |
378 | /* Initialize VDP */ |
379 | jsr init_gfx |
380 | |
80560599 |
381 | /* Clear h/v scroll */ |
382 | movea.l #GFXDATA,a0 |
383 | VRAM_ADDR 0x8000,(GFXCNTL) |
384 | move.l #0,(a0) |
385 | VSRAM_ADDR 0,(GFXCNTL) |
386 | move.l #0,(a0) |
387 | |
4db6e09f |
388 | /* Load color data */ |
0fc4f06b |
389 | movea.l #0,a0 |
318e20ff |
390 | lea (colors,pc),a1 |
0fc4f06b |
391 | moveq.l #(colors_end-colors)/2,d0 |
4db6e09f |
392 | jsr load_colors |
393 | |
d90ff128 |
394 | /* load font patterns */ |
318e20ff |
395 | movea.l #GFXDATA,a0 |
396 | lea (font,pc),a1 |
d90ff128 |
397 | VRAM_ADDR 0,(GFXCNTL) |
398 | move.w #128*8,d3 |
399 | font_loop: |
400 | moveq.l #8-1,d2 |
401 | moveq.l #0,d1 |
402 | move.b (a1)+,d0 |
403 | 0: |
404 | lsr.b #1,d0 |
405 | roxl.l #1,d1 |
406 | ror.l #5,d1 |
407 | dbra d2,0b |
408 | |
409 | rol.l #1,d1 /* fixup */ |
410 | move.l d1,(a0) |
411 | dbra d3,font_loop |
4db6e09f |
412 | |
413 | /* generate A layer map */ |
1286a1ba |
414 | movea.l #0xe000,a1 |
4db6e09f |
415 | move.l #28-1,d4 |
416 | lmaploop0: |
1286a1ba |
417 | movea.l a1,a0 |
4db6e09f |
418 | jsr load_prepare |
419 | |
570c4371 |
420 | move.l #64/2-1,d3 |
0fc4f06b |
421 | 0: move.l #0x00000000,(a0) |
4db6e09f |
422 | dbra d3,0b |
423 | |
1286a1ba |
424 | add.l #64*2,a1 |
4db6e09f |
425 | dbra d4,lmaploop0 |
426 | |
427 | /* generate B layer map */ |
0fc4f06b |
428 | movea.l #0xc000,a0 |
4db6e09f |
429 | jsr load_prepare |
430 | |
570c4371 |
431 | move.l #64*28/2-1,d3 |
0fc4f06b |
432 | 0: move.l #0x00000000,(a0) |
4db6e09f |
433 | dbra d3,0b |
434 | |
435 | /* upload sprite data */ |
0fc4f06b |
436 | movea.l #0xfc00,a0 |
4db6e09f |
437 | jsr load_prepare |
318e20ff |
438 | lea (sprite_data,pc),a1 |
4db6e09f |
439 | |
440 | move.l #(sprite_data_end-sprite_data)/2-1,d3 |
0fc4f06b |
441 | 0: move.l (a1)+,(a0) |
4db6e09f |
442 | dbra d3,0b |
443 | |
318e20ff |
444 | .if USE_VINT |
d4279640 |
445 | /* wait for vsync before unmask */ |
318e20ff |
446 | jsr wait_vsync_poll |
d4279640 |
447 | |
74d5977b |
448 | /* wait a bit to avoid nested vint */ |
449 | move.w #20,d0 |
450 | 0: |
451 | dbra d0,0b /* 10 cycles to go back */ |
452 | |
318e20ff |
453 | /* enable and unmask vint */ |
454 | write_vdp_r_dst 1,(VDP1_E_VBI | VDP1_E_DISPLAY | VDP1_MODE5),(GFXCNTL) |
74d5977b |
455 | move.w #0x2000,sr |
318e20ff |
456 | .endif |
570c4371 |
457 | |
4db6e09f |
458 | ################################################## |
1286a1ba |
459 | |
4db6e09f |
460 | forever: |
318e20ff |
461 | .if USE_VINT |
4db6e09f |
462 | jsr wait_vsync |
318e20ff |
463 | .else |
464 | jsr wait_vsync_poll |
465 | jsr VBL |
466 | .endif |
4db6e09f |
467 | bra forever |
4db6e09f |
468 | |
469 | |
d4279640 |
470 | INT: |
471 | /* let's hope VRAM is already set up.. */ |
318e20ff |
472 | lea (txt_exc,pc),a0 |
d4279640 |
473 | move.l #9,d0 |
474 | move.l #27,d1 |
475 | move.l #0xe000,d2 |
476 | jsr print |
477 | bra forever |
478 | |
479 | ################################################## |
480 | |
1286a1ba |
481 | VBL: |
fbad1b76 |
482 | addq.b #1,d7 |
d90ff128 |
483 | # movem.l d0-d4/a0-a5,-(a7) |
1286a1ba |
484 | |
8689c962 |
485 | btst.b #5,(0xa10005).l |
486 | bne no_auto_transfer |
487 | change_mode MMODE_PC, MMODE_MAIN |
488 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
489 | |
490 | no_auto_transfer: |
fbad1b76 |
491 | moveq.l #0,d0 |
492 | move.w d7,d0 |
493 | lsr.w #6,d0 |
494 | and.w #0x1c,d0 |
318e20ff |
495 | lea (jumptab,pc,d0),a0 |
fbad1b76 |
496 | jmp (a0) |
497 | jumptab: |
272bd2ec |
498 | /* branch insns here because we want to be position independent */ |
318e20ff |
499 | bra mode_main |
500 | bra mode_val_input |
501 | bra mode_edit_val /* edit val in editor */ |
502 | bra mode_goto |
503 | bra mode_start_menu |
504 | bra mode_goto_predef |
505 | bra mode_jmp_addr |
80560599 |
506 | bra mode_transfer |
fbad1b76 |
507 | |
508 | ##################### main ####################### |
509 | |
510 | mode_main: |
d4279640 |
511 | /* assume we will hang */ |
318e20ff |
512 | lea (txt_dtack_err,pc),a0 |
d4279640 |
513 | move.l #9,d0 |
514 | move.l #27,d1 |
515 | move.l #0xe000,d2 |
516 | jsr print |
517 | |
518 | moveq.l #0,d1 |
1286a1ba |
519 | move.l a6,d0 |
4276cd7a |
520 | move.b d0,d1 |
1286a1ba |
521 | lsr.l #8,d0 |
522 | move.l d0,a1 /* current addr */ |
4276cd7a |
523 | lsr.b #3,d1 |
524 | neg.b d1 |
525 | add.b #27-1,d1 /* line where the cursor sits */ |
526 | swap d1 |
1286a1ba |
527 | |
27d5cc88 |
528 | movea.l #0xe002,a2 |
4276cd7a |
529 | move.l #27-1,d5 /* line counter for dbra */ |
530 | or.l d1,d5 |
1286a1ba |
531 | |
27d5cc88 |
532 | draw_row: |
1286a1ba |
533 | move.l a2,a0 |
534 | jsr load_prepare |
535 | |
27d5cc88 |
536 | btst.l #15,d7 |
537 | beq 0f |
538 | move.w #' ',(a0) |
539 | 0: |
1286a1ba |
540 | /* addr */ |
541 | move.l a1,d2 |
542 | moveq.l #6,d3 |
543 | jsr print_hex_preped |
544 | |
27d5cc88 |
545 | btst.l #4,d6 |
546 | bne draw_row_safe |
547 | |
d4279640 |
548 | bsr get_safety_mask |
549 | cmp.b #0xf,d0 |
550 | beq draw_row_safe |
27d5cc88 |
551 | |
d4279640 |
552 | # unsafe or partially safe |
553 | draw_row_hsafe: |
554 | move.l d0,d4 |
555 | swap d4 /* mask in upper word */ |
27d5cc88 |
556 | btst.l #15,d7 |
d4279640 |
557 | bne draw_row_hsafe_words_pre |
27d5cc88 |
558 | |
d4279640 |
559 | draw_row_hsafe_bytes_pre: |
27d5cc88 |
560 | /* 8 bytes */ |
d4279640 |
561 | moveq.l #2,d3 |
562 | move.w #3,d4 |
563 | |
564 | draw_row_hsafe_bytes: |
27d5cc88 |
565 | move.w #' ',(a0) |
d4279640 |
566 | move.b d4,d0 |
567 | add.b #16,d0 |
568 | btst.l d0,d4 |
569 | bne 0f |
27d5cc88 |
570 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
571 | move.w #' ',(a0) |
572 | move.l #'?'|('?'<<16),(a0) |
573 | bra 1f |
574 | 0: |
575 | move.b (0,a1),d2 |
576 | jsr print_hex_preped |
577 | move.w #' ',(a0) |
578 | move.b (1,a1),d2 |
579 | jsr print_hex_preped |
580 | 1: |
581 | addq.l #2,a1 |
582 | dbra d4,draw_row_hsafe_bytes |
27d5cc88 |
583 | |
584 | move.w #' ',(a0) |
585 | |
586 | move.l d5,d0 |
587 | swap d0 |
588 | cmp.w d5,d0 |
589 | beq draw_cursor_unsafe_byte |
d4279640 |
590 | bra draw_chars_hsafe_pre |
27d5cc88 |
591 | |
d4279640 |
592 | draw_row_hsafe_words_pre: |
27d5cc88 |
593 | /* 4 shorts */ |
d4279640 |
594 | moveq.l #4,d3 |
595 | move.w #3,d4 |
596 | |
597 | draw_row_hsafe_words: |
27d5cc88 |
598 | move.w #' ',(a0) |
d4279640 |
599 | move.b d4,d0 |
600 | add.b #16,d0 |
601 | btst.l d0,d4 |
602 | bne 0f |
27d5cc88 |
603 | move.l #'?'|('?'<<16),(a0) |
604 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
605 | bra 1f |
606 | 0: |
607 | move.w (a1),d2 |
608 | jsr print_hex_preped |
609 | 1: |
610 | addq.l #2,a1 |
611 | dbra d4,draw_row_hsafe_words |
27d5cc88 |
612 | |
613 | move.l #(' '<<16)|' ',(a0) |
614 | |
615 | move.l d5,d0 |
616 | swap d0 |
617 | cmp.w d5,d0 |
618 | beq draw_cursor_unsafe_word |
619 | |
d4279640 |
620 | draw_chars_hsafe_pre: |
621 | subq.l #8,a1 |
622 | move.w #3,d4 |
623 | moveq.l #0,d0 |
624 | |
625 | draw_chars_hsafe: |
626 | move.b d4,d0 |
627 | add.b #16,d0 |
628 | btst.l d0,d4 |
629 | bne 0f |
27d5cc88 |
630 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
631 | bra draw_chars_hsafe_next |
632 | 0: |
633 | btst.l #15,d7 /* must perform correct read type */ |
634 | bne 0f /* doing byte reads on security reg hangs */ |
635 | move.b (0,a1),d0 |
636 | lsl.l #8,d0 |
637 | move.b (1,a1),d0 |
638 | bra 1f |
639 | 0: |
640 | move.w (a1),d0 |
641 | 1: |
642 | ror.l #8,d0 |
643 | move.b d0,d1 |
644 | sub.b #0x20,d1 |
645 | cmp.b #0x60,d1 |
646 | blo 0f |
647 | move.b #'.',d0 |
648 | 0: |
649 | move.w d0,(a0) |
650 | |
651 | move.b #0,d0 |
652 | rol.l #8,d0 |
653 | move.b d0,d1 |
654 | sub.b #0x20,d1 |
655 | cmp.b #0x60,d1 |
656 | blo 0f |
657 | move.b #'.',d0 |
658 | 0: |
659 | move.w d0,(a0) |
660 | |
661 | draw_chars_hsafe_next: |
662 | addq.l #2,a1 |
663 | dbra d4,draw_chars_hsafe |
27d5cc88 |
664 | |
665 | move.l #(' '<<16)|' ',(a0) |
27d5cc88 |
666 | add.w #0x80,a2 |
667 | dbra d5,draw_row |
668 | bra draw_status_bar |
669 | |
670 | |
671 | # normal draw |
672 | draw_row_safe: |
673 | btst.l #15,d7 |
674 | bne draw_row_words |
675 | |
676 | draw_row_bytes: |
677 | /* 8 bytes */ |
678 | moveq.l #2,d3 |
679 | moveq.l #8-1,d4 |
680 | draw_bytes: |
681 | move.w #' ',(a0) |
682 | move.b (a1)+,d2 |
683 | jsr print_hex_preped |
684 | dbra d4,draw_bytes |
685 | |
686 | move.w #' ',(a0) |
687 | |
688 | move.l d5,d0 |
689 | swap d0 |
690 | cmp.w d5,d0 |
691 | beq draw_cursor_byte |
692 | bra draw_chars_pre |
693 | |
694 | draw_row_words: |
1286a1ba |
695 | /* 4 shorts */ |
4276cd7a |
696 | moveq.l #4,d3 |
1286a1ba |
697 | moveq.l #4-1,d4 |
27d5cc88 |
698 | draw_words: |
1286a1ba |
699 | move.w #' ',(a0) |
700 | move.w (a1)+,d2 |
1286a1ba |
701 | jsr print_hex_preped |
27d5cc88 |
702 | dbra d4,draw_words |
703 | |
704 | move.l #(' '<<16)|' ',(a0) |
1286a1ba |
705 | |
4276cd7a |
706 | move.l d5,d0 |
707 | swap d0 |
708 | cmp.w d5,d0 |
27d5cc88 |
709 | beq draw_cursor_word |
4276cd7a |
710 | |
711 | draw_chars_pre: |
1286a1ba |
712 | /* 8 chars */ |
713 | subq.l #8,a1 |
714 | moveq.l #8-1,d4 |
715 | draw_chars: |
716 | move.b (a1)+,d0 |
717 | move.b d0,d1 |
718 | sub.b #0x20,d1 |
719 | cmp.b #0x60,d1 |
720 | blo 0f |
721 | move.w #'.',d0 |
722 | 0: |
723 | move.w d0,(a0) |
724 | dbra d4,draw_chars |
725 | |
27d5cc88 |
726 | move.l #(' '<<16)|' ',(a0) |
727 | |
1286a1ba |
728 | add.w #0x80,a2 |
27d5cc88 |
729 | dbra d5,draw_row |
1286a1ba |
730 | |
d4279640 |
731 | |
27d5cc88 |
732 | draw_status_bar: |
4276cd7a |
733 | /* status bar */ |
27d5cc88 |
734 | move.l a2,a0 |
4276cd7a |
735 | jsr load_prepare |
27d5cc88 |
736 | |
737 | btst.l #15,d7 |
738 | beq 0f |
739 | move.w #' ',(a0) |
740 | 0: |
4dfddc2f |
741 | mk_a6_addr d2 |
4276cd7a |
742 | move.l #0x4006,d3 |
743 | jsr print_hex_preped |
d4279640 |
744 | |
745 | /* clear error */ |
746 | moveq.l #5-1,d0 |
747 | 0: |
748 | move.l #' '|(' '<<16),(a0) |
749 | move.l #' '|(' '<<16),(a0) |
750 | dbra d0,0b |
751 | |
4276cd7a |
752 | |
1286a1ba |
753 | /* handle input */ |
754 | jsr get_input /* x0cbrldu x1sa00du */ |
1286a1ba |
755 | |
fbad1b76 |
756 | btst.l #16+4,d0 /* A - scroll modifier */ |
757 | beq input_noa |
758 | |
126ec270 |
759 | do_dpad 16+0, sub.l, #0x0800 |
760 | do_dpad 16+1, add.l, #0x0800 |
761 | do_dpad 16+10, sub.l, #0xd800 |
762 | do_dpad 16+11, add.l, #0xd800 |
fbad1b76 |
763 | input_noa: |
764 | moveq.l #0,d1 |
4dfddc2f |
765 | move.w d7,d1 |
766 | lsr.w #7,d1 |
767 | lsr.w #7,d1 |
fbad1b76 |
768 | |
126ec270 |
769 | do_dpad 0, subq.l, #0x0008 |
770 | do_dpad 1, addq.l, #0x0008 |
771 | do_dpad 10, sub.l, d1 |
772 | do_dpad 11, add.l, d1 |
fbad1b76 |
773 | |
774 | dpad_end: |
4dfddc2f |
775 | /* update addr */ |
776 | move.l a6,d1 |
777 | cmp.b #0xf0,d1 |
778 | blo 0f |
779 | sub.l #0xd800,a6 |
780 | add.w #0x00d8,a6 |
781 | bra 1f |
782 | 0: |
783 | cmp.b #0xd8,d1 |
784 | blo 1f |
785 | add.l #0xd800,a6 |
786 | sub.w #0x00d8,a6 |
787 | 1: |
788 | |
789 | /* other btns */ |
fbad1b76 |
790 | moveq.l #0,d1 |
791 | btst.l #12,d0 /* B - switch byte/word mode */ |
792 | beq input_nob |
4dfddc2f |
793 | bclr.l #15,d7 |
794 | add.w #0x4000,d7 /* changes between 01 10 */ |
fbad1b76 |
795 | move.l a6,d1 |
796 | and.l #1,d1 |
797 | sub.l d1,a6 /* make even, just in case */ |
798 | |
799 | input_nob: |
800 | btst.l #13,d0 /* C - edit selected byte */ |
801 | beq input_noc |
4dfddc2f |
802 | |
803 | change_mode MMODE_EDIT_VAL, MMODE_MAIN |
27d5cc88 |
804 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
fbad1b76 |
805 | |
806 | input_noc: |
27d5cc88 |
807 | btst.l #5,d0 /* Start - menu */ |
4dfddc2f |
808 | beq input_nos |
809 | |
27d5cc88 |
810 | moveq.l #0,d5 |
811 | change_mode MMODE_START_MENU, MMODE_MAIN |
812 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
1286a1ba |
813 | |
4dfddc2f |
814 | input_nos: |
fbad1b76 |
815 | vbl_end: |
d90ff128 |
816 | # movem.l (a7)+,d0-d4/a0-a5 |
318e20ff |
817 | .if USE_VINT |
1286a1ba |
818 | rte |
318e20ff |
819 | .else |
820 | rts |
821 | .endif |
1286a1ba |
822 | |
823 | |
27d5cc88 |
824 | draw_cursor_unsafe_byte: |
825 | move.l a6,d0 |
826 | and.l #7,d0 /* byte offs */ |
827 | move.b d0,d1 |
828 | add.b d0,d0 |
829 | add.b d1,d0 /* d0 *= 3 (chars) */ |
830 | add.b d0,d0 |
831 | lea (7*2,a2,d0),a0 |
832 | jsr load_prepare |
833 | move.l #(0x2000|'?'|((0x2000|'?')<<16)),(a0) |
834 | |
835 | move.l a2,a0 |
836 | add.w #31*2,a0 |
837 | jsr load_prepare /* restore a0 */ |
318e20ff |
838 | bra draw_chars_hsafe_pre |
27d5cc88 |
839 | |
840 | draw_cursor_unsafe_word: |
4276cd7a |
841 | move.l a6,d0 |
842 | and.l #7,d0 /* byte offs */ |
843 | move.l d0,d1 |
844 | lsr.b #1,d1 /* which word */ |
845 | move.b d1,d2 |
846 | lsl.b #2,d2 |
847 | add.b d2,d1 /* num of chars to skip */ |
27d5cc88 |
848 | add.b d1,d1 |
849 | |
850 | lea (8*2,a2,d1),a0 |
851 | jsr load_prepare |
852 | move.l #(0x2000|'?'|((0x2000|'?')<<16)),d0 |
853 | move.l d0,(a0) |
854 | move.l d0,(a0) |
855 | |
856 | move.l a2,a0 |
857 | add.w #29*2,a0 |
858 | jsr load_prepare /* restore a0 */ |
318e20ff |
859 | bra draw_chars_hsafe_pre |
4276cd7a |
860 | |
4276cd7a |
861 | |
fbad1b76 |
862 | draw_cursor_byte: |
27d5cc88 |
863 | move.l a6,d0 |
864 | and.l #7,d0 /* byte offs */ |
865 | move.w #0x2002,d3 |
866 | |
fbad1b76 |
867 | move.b (-8,a1,d0),d2 |
27d5cc88 |
868 | move.b d0,d1 |
869 | add.b d0,d0 |
870 | add.b d1,d0 /* d0 *= 3 (chars) */ |
871 | add.b d0,d0 |
872 | lea (7*2,a2,d0),a0 |
873 | jsr load_prepare |
874 | jsr print_hex_preped |
875 | |
876 | move.l a2,a0 |
877 | add.w #31*2,a0 |
878 | jsr load_prepare /* restore a0 */ |
879 | |
318e20ff |
880 | bra draw_chars_pre |
fbad1b76 |
881 | |
882 | draw_cursor_word: |
27d5cc88 |
883 | move.l a6,d0 |
884 | and.l #7,d0 /* byte offs */ |
885 | move.l d0,d1 |
886 | lsr.b #1,d1 /* which word */ |
887 | move.b d1,d2 |
888 | lsl.b #2,d2 |
889 | add.b d2,d1 /* num of chars to skip */ |
890 | add.b d1,d1 |
891 | move.w #0x2004,d3 |
892 | |
fbad1b76 |
893 | move.w (-8,a1,d0),d2 |
27d5cc88 |
894 | lea (8*2,a2,d1),a0 |
4276cd7a |
895 | jsr load_prepare |
4276cd7a |
896 | jsr print_hex_preped |
897 | |
898 | move.l a2,a0 |
27d5cc88 |
899 | add.w #29*2,a0 |
4276cd7a |
900 | jsr load_prepare /* restore a0 */ |
901 | |
318e20ff |
902 | bra draw_chars_pre |
4276cd7a |
903 | |
904 | |
4dfddc2f |
905 | #################### hedit ####################### |
906 | |
907 | mode_edit_val: |
908 | btst.l #7,d6 |
909 | bne mode_hedit_finish |
910 | |
911 | /* read val to edit */ |
5f6473d9 |
912 | moveq.l #0,d5 |
4dfddc2f |
913 | mk_a6_addr d1 |
914 | move.l d1,a0 |
4dfddc2f |
915 | btst.l #15,d7 |
916 | bne 0f |
5f6473d9 |
917 | move.b (a0),d5 |
918 | lsl.l #8,d5 |
919 | or.b #1,d5 |
4dfddc2f |
920 | bra 1f |
921 | 0: |
5f6473d9 |
922 | move.w (a0),d5 |
923 | lsl.l #8,d5 |
924 | or.b #2,d5 |
4dfddc2f |
925 | 1: |
4dfddc2f |
926 | |
4dfddc2f |
927 | change_mode MMODE_VAL_INPUT, MMODE_EDIT_VAL |
318e20ff |
928 | bra vbl_end |
4dfddc2f |
929 | |
930 | mode_hedit_finish: |
931 | /* write the val */ |
932 | mk_a6_addr d1 |
933 | move.l d1,a0 |
5f6473d9 |
934 | lsr.l #8,d5 |
4dfddc2f |
935 | |
936 | btst.l #15,d7 |
937 | bne 0f |
5f6473d9 |
938 | move.b d5,(a0) |
4dfddc2f |
939 | bra 1f |
940 | 0: |
5f6473d9 |
941 | move.w d5,(a0) |
4dfddc2f |
942 | 1: |
943 | |
4dfddc2f |
944 | bra return_to_main |
945 | |
946 | ##################### goto ####################### |
947 | |
948 | mode_goto: |
949 | btst.l #7,d6 |
950 | bne mode_goto_finish |
fbad1b76 |
951 | |
5f6473d9 |
952 | moveq.l #0,d5 |
953 | swap d6 |
954 | move.w d6,d5 |
955 | swap d6 |
956 | swap d5 |
957 | or.b #3,d5 /* 3 bytes */ |
4dfddc2f |
958 | bclr.l #7,d6 |
959 | change_mode MMODE_VAL_INPUT, MMODE_GOTO |
318e20ff |
960 | bra vbl_end |
4dfddc2f |
961 | |
962 | mode_goto_finish: |
5f6473d9 |
963 | lsr.l #8,d5 |
964 | move.l d5,d0 |
4dfddc2f |
965 | move.l d0,d1 |
966 | and.l #7,d1 |
967 | and.b #0xf8,d0 |
968 | lsl.l #8,d0 |
969 | or.l d1,d0 |
970 | move.l d0,a6 |
971 | |
5f6473d9 |
972 | lsr.l #8,d5 |
973 | swap d6 |
974 | move.w d5,d6 |
975 | swap d6 |
976 | |
4dfddc2f |
977 | bra return_to_main |
978 | |
979 | ################### val edit ##################### |
980 | |
981 | mode_val_input: |
982 | /* frame */ |
983 | movea.l #0xe000+14*2+11*64*2,a1 |
984 | moveq.l #6-1,d1 |
985 | 0: |
986 | move.w a1,a0 |
987 | jsr load_prepare |
988 | moveq.l #11-1,d0 |
989 | 1: |
990 | move.w #0,(a0) |
991 | dbra d0,1b |
992 | |
993 | add.w #64*2,a1 |
994 | dbra d1,0b |
995 | |
996 | /* text */ |
318e20ff |
997 | lea (txt_edit,pc),a0 |
4dfddc2f |
998 | move.l #15,d0 |
999 | move.l #11,d1 |
1000 | move.l #0xc000,d2 |
1001 | jsr print |
1002 | |
318e20ff |
1003 | lea (txt_a_confirm,pc),a0 |
4dfddc2f |
1004 | move.l #15,d0 |
1005 | move.l #15,d1 |
1006 | move.l #0xc000,d2 |
1007 | jsr print |
1008 | |
1009 | /* edit field */ |
1010 | moveq.l #0,d0 |
1011 | moveq.l #0,d1 |
1012 | moveq.l #0,d3 |
5f6473d9 |
1013 | move.b d5,d3 |
1014 | and.b #3,d3 /* edit field bytes */ |
4dfddc2f |
1015 | |
1016 | move.b #19,d0 |
1017 | sub.b d3,d0 |
1018 | move.b #13,d1 |
5f6473d9 |
1019 | move.l d5,d2 |
4dfddc2f |
1020 | lsr.l #8,d2 |
1021 | add.b d3,d3 |
1022 | or.w #0x8000,d3 |
1023 | jsr print_hex |
1024 | |
1025 | /* current char */ |
1026 | moveq.l #0,d0 |
1027 | moveq.l #0,d1 |
1028 | |
1029 | and.w #6,d3 |
1030 | move.b #19,d0 |
1031 | move.b d3,d1 |
1032 | lsr.b #1,d1 /* length in bytes */ |
1033 | sub.b d1,d0 |
5f6473d9 |
1034 | move.b d5,d1 |
1035 | lsr.b #2,d1 |
4dfddc2f |
1036 | and.b #7,d1 /* nibble to edit */ |
1037 | add.b d1,d0 |
1038 | |
1039 | sub.b d1,d3 |
1040 | sub.b #1,d3 /* chars to shift out */ |
1041 | lsl.b #2,d3 |
1042 | add.b #8,d3 |
5f6473d9 |
1043 | move.l d5,d2 |
4dfddc2f |
1044 | lsr.l d3,d2 |
1045 | |
1046 | move.b #13,d1 |
1047 | move.w #0xa001,d3 |
1048 | jsr print_hex |
1049 | |
1050 | /* handle input */ |
1051 | jsr get_input /* x0cbrldu x1sa00du */ |
1052 | |
1053 | move.w d0,d1 |
1054 | and.w #0x0f00,d1 |
1055 | beq ai_no_dpad |
5f6473d9 |
1056 | move.b d5,d1 |
1057 | and.b #3,d1 |
4dfddc2f |
1058 | add.b d1,d1 /* nibble count */ |
1059 | sub.b #1,d1 /* max n.t.e. val */ |
5f6473d9 |
1060 | move.b d5,d2 |
1061 | lsr.b #2,d2 |
4dfddc2f |
1062 | and.b #7,d2 /* nibble to edit */ |
1063 | |
1064 | move.b d0,d3 |
1065 | and.b #3,d3 |
1066 | beq ai_no_ud |
1067 | moveq.l #0,d3 |
1068 | moveq.l #0,d4 |
1069 | move.b #0xf,d3 |
1070 | move.b #0x1,d4 |
1071 | sub.b d2,d1 |
1072 | lsl.b #2,d1 |
1073 | add.b #8,d1 |
1074 | lsl.l d1,d3 /* mask */ |
1075 | lsl.l d1,d4 /* what to add/sub */ |
5f6473d9 |
1076 | move.l d5,d1 |
4dfddc2f |
1077 | and.l d3,d1 |
1078 | btst.l #8,d0 |
1079 | beq 0f |
1080 | add.l d4,d1 |
1081 | bra 1f |
1082 | 0: |
1083 | sub.l d4,d1 |
1084 | 1: |
1085 | and.l d3,d1 |
1086 | eor.l #0xffffffff,d3 |
5f6473d9 |
1087 | and.l d3,d5 |
1088 | or.l d1,d5 |
318e20ff |
1089 | bra vbl_end |
4dfddc2f |
1090 | |
1091 | ai_no_ud: |
1092 | btst.l #10,d0 |
1093 | bne 0f |
1094 | add.b #1,d2 |
1095 | bra 1f |
1096 | 0: |
1097 | sub.b #1,d2 |
1098 | 1: |
1099 | cmp.b #0,d2 |
1100 | bge 0f |
1101 | move.b d1,d2 |
1102 | 0: |
1103 | cmp.b d1,d2 |
1104 | ble 0f |
1105 | move.b #0,d2 |
1106 | 0: |
5f6473d9 |
1107 | and.b #0xe3,d5 |
1108 | lsl.b #2,d2 |
1109 | or.b d2,d5 |
318e20ff |
1110 | bra vbl_end |
4dfddc2f |
1111 | |
1112 | ai_no_dpad: |
1113 | move.w d0,d1 |
1114 | and.w #0x1020,d1 |
1115 | beq ai_no_sb |
1116 | |
4dfddc2f |
1117 | bra return_to_main |
1118 | |
1119 | ai_no_sb: |
5f6473d9 |
1120 | btst.l #4,d0 /* A - confirm */ |
4dfddc2f |
1121 | beq ai_no_input |
1122 | bset.l #7,d6 |
5f6473d9 |
1123 | move.w d7,d1 /* back to prev mode */ |
4dfddc2f |
1124 | and.w #0x3800,d1 |
1125 | lsr.w #3,d1 |
1126 | and.w #0xc0ff,d7 |
1127 | or.w d1,d7 |
1128 | |
1129 | ai_no_input: |
318e20ff |
1130 | bra vbl_end |
4dfddc2f |
1131 | |
1132 | |
27d5cc88 |
1133 | ################### start menu ################### |
1134 | |
1135 | mode_start_menu: |
1136 | /* frame */ |
1137 | bsr start_menu_box |
1138 | |
1139 | /* text */ |
1140 | menu_text txt_about, 13, 9, 1 |
1141 | menu_text txt_goto, 13, 11, 0 |
1142 | menu_text txt_goto_predef, 13, 12, 0 |
d90ff128 |
1143 | menu_text txt_jmp_addr, 13, 13, 0 |
80560599 |
1144 | menu_text txt_dump, 13, 14, 0 |
1145 | menu_text txt_dtack, 13, 15, 0 |
1146 | menu_text txt_a_confirm, 13, 17, 2 |
27d5cc88 |
1147 | |
1148 | /* dtack safety on/off */ |
80560599 |
1149 | movea.l #0xe000+26*2+15*64*2,a0 |
27d5cc88 |
1150 | jsr load_prepare |
1151 | move.w #0x8000|'O',(a0) |
1152 | btst.l #4,d6 |
1153 | bne 0f |
1154 | move.w #0x8000|'N',(a0) |
1155 | bra 1f |
1156 | 0: |
1157 | move.w #0x8000|'F',(a0) |
1158 | move.w #0x8000|'F',(a0) |
1159 | 1: |
1160 | |
1161 | /* cursor */ |
1162 | movea.l #0xe000+11*2+11*64*2,a0 |
1163 | moveq.l #0,d0 |
1164 | move.b d5,d0 |
80560599 |
1165 | and.b #7,d0 |
27d5cc88 |
1166 | lsl.w #7,d0 |
1167 | add.w d0,a0 |
1168 | jsr load_prepare |
1169 | move.w #'>',(a0) |
1170 | |
1171 | /* input */ |
1172 | jsr get_input /* x0cbrldu x1sa00du */ |
1173 | |
1174 | move.w d0,d1 |
1175 | and.w #3,d1 |
1176 | beq msm_no_ud |
1177 | move.b d5,d1 |
80560599 |
1178 | and.b #7,d1 |
27d5cc88 |
1179 | btst.l #0,d0 |
1180 | sne d2 |
1181 | or.b #1,d2 /* up -1, down 1 */ |
1182 | add.b d2,d1 |
1183 | cmp.b #0,d1 |
1184 | bge 0f |
80560599 |
1185 | move.b #4,d1 |
27d5cc88 |
1186 | 0: |
80560599 |
1187 | cmp.b #4,d1 |
27d5cc88 |
1188 | ble 0f |
1189 | move.b #0,d1 |
1190 | 0: |
80560599 |
1191 | and.b #0xf8,d5 |
27d5cc88 |
1192 | or.b d1,d5 |
318e20ff |
1193 | bra vbl_end |
27d5cc88 |
1194 | |
1195 | msm_no_ud: |
1196 | btst.l #4,d0 /* A - confirm */ |
1197 | beq msm_no_a |
1198 | move.b d5,d1 |
80560599 |
1199 | and.b #7,d1 |
27d5cc88 |
1200 | bne 0f |
1201 | change_mode MMODE_GOTO, MMODE_MAIN |
1202 | bsr start_menu_box |
318e20ff |
1203 | bra vbl_end |
27d5cc88 |
1204 | 0: |
1205 | cmp.b #1,d1 |
1206 | bne 0f |
1207 | moveq.l #0,d5 |
1208 | change_mode MMODE_GOTO_PREDEF, MMODE_MAIN |
1209 | bsr start_menu_box |
318e20ff |
1210 | bra vbl_end |
27d5cc88 |
1211 | 0: |
1212 | cmp.b #2,d1 |
1213 | bne 0f |
d90ff128 |
1214 | change_mode MMODE_JMP_ADDR, MMODE_MAIN |
1215 | bsr start_menu_box |
318e20ff |
1216 | bra vbl_end |
d90ff128 |
1217 | 0: |
1218 | cmp.b #3,d1 |
1219 | bne 0f |
8689c962 |
1220 | change_mode MMODE_PC, MMODE_MAIN |
80560599 |
1221 | bsr start_menu_box |
1222 | bra vbl_end |
1223 | 0: |
1224 | cmp.b #4,d1 |
1225 | bne 0f |
27d5cc88 |
1226 | bchg.l #4,d6 |
318e20ff |
1227 | bra vbl_end |
27d5cc88 |
1228 | 0: |
1229 | |
1230 | msm_no_a: |
1231 | move.w d0,d1 |
1232 | and.w #0x3000,d1 |
1233 | beq msm_no_bc |
1234 | bra return_to_main |
1235 | |
1236 | msm_no_bc: |
318e20ff |
1237 | bra vbl_end |
27d5cc88 |
1238 | |
1239 | start_menu_box: |
1240 | movea.l #0xe000+10*2+8*64*2,a1 |
80560599 |
1241 | move.w #11-1,d1 |
27d5cc88 |
1242 | 0: |
1243 | move.w a1,a0 |
1244 | jsr load_prepare |
1245 | move.w #20-1,d0 |
1246 | 1: |
1247 | move.w #0,(a0) |
1248 | dbra d0,1b |
1249 | |
1250 | add.w #64*2,a1 |
1251 | dbra d1,0b |
1252 | rts |
1253 | |
1254 | ################### goto predef ################## |
1255 | |
1256 | mode_goto_predef: |
1257 | /* frame */ |
1258 | movea.l #0xe000+14*2+8*64*2,a1 |
1259 | move.l #predef_addr_cnt+2-1,d1 |
1260 | 0: |
1261 | move.w a1,a0 |
1262 | jsr load_prepare |
1263 | moveq.l #10-1,d0 |
1264 | 1: |
1265 | move.w #0,(a0) |
1266 | dbra d0,1b |
1267 | |
1268 | add.w #64*2,a1 |
1269 | dbra d1,0b |
1270 | |
1271 | /* draw addresses */ |
1272 | movea.l #0xe000+17*2+9*64*2,a1 |
318e20ff |
1273 | lea (predef_addrs,pc),a2 |
27d5cc88 |
1274 | move.w #predef_addr_cnt-1,d4 |
1275 | move.l #0x8006,d3 |
1276 | mgp_da_loop: |
1277 | move.w a1,a0 |
1278 | jsr load_prepare |
1279 | move.l (a2)+,d2 |
1280 | jsr print_hex_preped |
1281 | add.w #64*2,a1 |
1282 | dbra d4,mgp_da_loop |
1283 | |
1284 | /* cursor */ |
1285 | movea.l #0xe000+15*2+9*64*2,a0 |
1286 | moveq.l #0,d0 |
1287 | move.b d5,d0 |
1288 | lsl.w #7,d0 |
1289 | add.w d0,a0 |
1290 | jsr load_prepare |
1291 | move.w #'>',(a0) |
1292 | |
1293 | /* input */ |
1294 | jsr get_input /* x0cbrldu x1sa00du */ |
1295 | |
1296 | move.w d0,d1 |
1297 | and.w #3,d1 |
1298 | beq mgp_no_ud |
1299 | btst.l #0,d0 |
1300 | sne d2 |
1301 | or.b #1,d2 /* up -1, down 1 */ |
1302 | add.b d2,d5 |
1303 | cmp.b #0,d5 |
1304 | bge 0f |
1305 | move.b #predef_addr_cnt-1,d5 |
1306 | 0: |
1307 | cmp.b #predef_addr_cnt-1,d5 |
1308 | ble 0f |
1309 | move.b #0,d5 |
1310 | 0: |
318e20ff |
1311 | bra vbl_end |
27d5cc88 |
1312 | |
1313 | mgp_no_ud: |
1314 | btst.l #4,d0 /* A - confirm */ |
1315 | beq mgp_no_a |
1316 | moveq.l #0,d0 |
1317 | move.b d5,d0 |
1318 | lsl.w #2,d0 |
318e20ff |
1319 | lea (predef_addrs,pc),a0 |
27d5cc88 |
1320 | move.l (a0,d0),d5 |
1321 | lsl.l #8,d5 |
318e20ff |
1322 | bra mode_goto_finish |
27d5cc88 |
1323 | |
1324 | mgp_no_a: |
1325 | move.w d0,d1 |
1326 | and.w #0x3000,d1 |
1327 | beq mgp_no_bc |
1328 | bra return_to_main |
1329 | |
1330 | mgp_no_bc: |
318e20ff |
1331 | bra vbl_end |
27d5cc88 |
1332 | |
d90ff128 |
1333 | ##################### jmp ######################## |
1334 | |
1335 | mode_jmp_addr: |
1336 | btst.l #7,d6 |
1337 | bne mode_jmp_finish |
1338 | |
1339 | moveq.l #0,d5 |
1340 | or.b #3,d5 /* 3 bytes */ |
1341 | bclr.l #7,d6 |
1342 | change_mode MMODE_VAL_INPUT, MMODE_JMP_ADDR |
318e20ff |
1343 | bra vbl_end |
d90ff128 |
1344 | |
1345 | mode_jmp_finish: |
1346 | lsr.l #8,d5 |
1347 | write_vdp_r_dst 1,(VDP1_E_DISPLAY | VDP1_MODE5),(GFXCNTL) /* disable vint */ |
1348 | move.l d5,a0 |
1349 | jmp (a0) |
1350 | |
80560599 |
1351 | mode_transfer: |
0da5ab5d |
1352 | .if PC_TRANSFER |
8689c962 |
1353 | move.b #0x40,(0xa1000b).l /* port 2 ctrl */ |
1354 | move.b #0x00,(0xa10005).l /* port 2 data - start with TH low */ |
80560599 |
1355 | |
8689c962 |
1356 | lea (txt_transfer_ready,pc),a0 |
80560599 |
1357 | move.l #13,d0 |
1358 | move.l #13,d1 |
1359 | move.l #0x8000,d2 |
1360 | jsr print |
1361 | |
1362 | wait_tl_low0: |
1363 | move.b (0xa10005),d0 |
1364 | btst.b #4,d0 |
1365 | bne wait_tl_low0 |
1366 | |
1367 | menu_text txt_working, 13, 13, 0 |
f0e06736 |
1368 | bsr do_transfer |
0da5ab5d |
1369 | .endif |
f0e06736 |
1370 | bra return_to_main |
27d5cc88 |
1371 | |
4dfddc2f |
1372 | # go back to main mode |
1373 | return_to_main: |
5f6473d9 |
1374 | bclr.l #7,d6 /* not edited */ |
4dfddc2f |
1375 | change_mode MMODE_MAIN, MMODE_MAIN |
27d5cc88 |
1376 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320),(GFXCNTL) |
318e20ff |
1377 | bra vbl_end |
fbad1b76 |
1378 | |
1379 | |
4db6e09f |
1380 | ################################################# |
1381 | # # |
1382 | # Initialize VDP registers # |
1383 | # # |
1384 | ################################################# |
1385 | |
1386 | init_gfx: |
1387 | move.l #GFXCNTL,a3 |
570c4371 |
1388 | write_vdp_reg 0,(VDP0_E_DISPLAY | VDP0_PLTT_FULL) |
318e20ff |
1389 | write_vdp_reg 1,(VDP1_E_DISPLAY | VDP1_MODE5) |
4db6e09f |
1390 | write_vdp_reg 2,(0xe000 >> 10) /* Screen map a adress */ |
1391 | write_vdp_reg 3,(0xe000 >> 10) /* Window address */ |
1392 | write_vdp_reg 4,(0xc000 >> 13) /* Screen map b address */ |
1393 | write_vdp_reg 5,(0xfc00 >> 9) /* Sprite address */ |
1394 | write_vdp_reg 6,0 |
570c4371 |
1395 | write_vdp_reg 7,0 /* Backdrop color */ |
80560599 |
1396 | write_vdp_reg 0x0a,1 /* Lines per hblank interrupt */ |
1397 | write_vdp_reg 0x0b,0 /* 2-cell vertical scrolling */ |
1398 | write_vdp_reg 0x0c,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320) |
1399 | write_vdp_reg 0x0d,(0x8000 >> 10) /* Horizontal scroll address */ |
1400 | write_vdp_reg 0x0e,0 |
1401 | write_vdp_reg 0x0f,2 |
1402 | write_vdp_reg 0x10,(VDP16_MAP_V32 | VDP16_MAP_H64) /* layer size */ |
1403 | write_vdp_reg 0x11,0 |
1404 | write_vdp_reg 0x12,0 |
4db6e09f |
1405 | rts |
1406 | |
1407 | |
d4279640 |
1408 | # get mask of bits representing safe words |
27d5cc88 |
1409 | # a1 - address to check |
1410 | # destroys d0-d2, strips upper bits from a1 |
d4279640 |
1411 | get_safety_mask: |
27d5cc88 |
1412 | move.l a1,d1 |
1413 | lsl.l #8,d1 |
1414 | lsr.l #8,d1 |
318e20ff |
1415 | lea (safe_addrs,pc),a1 |
27d5cc88 |
1416 | move.w #(safe_addrs_end - safe_addrs)/8-1,d2 |
3c2e737f |
1417 | cmp.l #0x4D415253,(0xa130ec) /* 'MARS' */ |
1418 | bne no_32x |
1419 | move.w #(safe_addrs_end_32x - safe_addrs)/8-1,d2 |
1420 | move.w (0xa15100),d0 |
1421 | and.w #3,d0 |
1422 | cmp.w #3,d0 /* ADEN and nRES */ |
1423 | bne no_32x_vdp |
1424 | btst.b #7,d0 /* FM */ |
1425 | bne no_32x_vdp |
1426 | move.w #(safe_addrs_end_32x_vdp - safe_addrs)/8-1,d2 |
1427 | no_32x_vdp: |
1428 | no_32x: |
1429 | |
27d5cc88 |
1430 | 0: |
1431 | move.l (a1)+,d0 |
1432 | cmp.l d0,d1 |
1433 | blt 1f |
1434 | move.l (a1),d0 |
1435 | cmp.l d0,d1 |
1436 | ble addr_safe |
1437 | 1: |
1438 | addq.l #4,a1 |
1439 | dbra d2,0b |
1440 | |
27d5cc88 |
1441 | move.l d1,a1 |
d4279640 |
1442 | |
1443 | moveq.l #0x0c,d0 |
1444 | cmp.l #0xa14000,d1 |
1445 | beq gsm_rts |
1446 | |
1447 | moveq.l #0x08,d0 |
1448 | cmp.l #0xa14100,d1 |
1449 | beq gsm_rts |
1450 | |
1451 | /* check for VDP address */ |
1452 | move.l d1,d0 |
1453 | swap d0 |
1454 | and.b #0xe0,d0 |
1455 | cmp.b #0xc0,d0 |
1456 | bne addr_unsafe /* not vdp */ |
1457 | |
1458 | move.l d1,d0 |
1459 | and.l #0x0700e0,d0 |
1460 | bne addr_unsafe |
1461 | |
1462 | move.l d1,d0 |
1463 | and.b #0x1f,d0 |
1464 | cmp.b #0x04,d0 |
1465 | blt addr_hsafe_3 /* data port */ |
1466 | cmp.b #0x10,d0 |
1467 | blt addr_safe /* below PSG */ |
1468 | cmp.b #0x18,d0 |
1469 | bge addr_safe /* above PSG */ |
1470 | |
1471 | addr_unsafe: |
1472 | moveq.l #0,d0 /* skip line */ |
1473 | rts |
1474 | |
1475 | addr_hsafe_3: |
1476 | moveq.l #3,d0 /* skip 2 words */ |
27d5cc88 |
1477 | rts |
1478 | |
1479 | addr_safe: |
1480 | move.l d1,a1 |
d4279640 |
1481 | moveq.l #0xf,d0 |
1482 | gsm_rts: |
27d5cc88 |
1483 | rts |
1484 | |
1485 | |
1286a1ba |
1486 | # read single phase from controller |
fbad1b76 |
1487 | # #a0 - addr |
1286a1ba |
1488 | # d0 - result |
fbad1b76 |
1489 | # destroys d1,d2 |
1286a1ba |
1490 | get_input: |
1491 | move.b #0x40,(0xa10003) |
1492 | nop |
1493 | nop |
1494 | nop |
1495 | move.b (0xa10003),d0 |
1496 | move.b #0x00,(0xa10003) |
1497 | lsl.w #8,d0 |
1498 | nop |
1499 | move.b (0xa10003),d0 |
1500 | eor.w #0xffff,d0 |
fbad1b76 |
1501 | |
1502 | swap d7 |
1503 | move.w d7,d1 |
1504 | eor.w d0,d1 /* changed btns */ |
1505 | move.w d0,d7 /* old val */ |
1506 | swap d7 |
1507 | and.w d0,d1 /* what changed now */ |
1508 | bne 0f |
1509 | |
1510 | addq.b #1,d6 |
1511 | move.b d6,d2 |
27d5cc88 |
1512 | and.b #0x0f,d2 /* do autorepeat */ |
1513 | cmp.b #9,d2 |
fbad1b76 |
1514 | bne 1f |
1515 | move.w d0,d1 |
1516 | 0: |
27d5cc88 |
1517 | and.b #0xf0,d6 |
fbad1b76 |
1518 | 1: |
1519 | swap d0 |
1520 | move.w d1,d0 |
1286a1ba |
1521 | rts |
1522 | |
4dfddc2f |
1523 | # Prepare to write to VDP RAM @a0 |
0fc4f06b |
1524 | # sets a0 to VDP data port for convenience |
1525 | # a0: VRAM base |
1526 | # destroys d0 |
570c4371 |
1527 | |
4db6e09f |
1528 | load_prepare: |
0fc4f06b |
1529 | VRAM_ADDR_var a0 |
1530 | move.l d0,(GFXCNTL).l |
1531 | move.l #GFXDATA,a0 |
4db6e09f |
1532 | rts |
1533 | |
1534 | |
0fc4f06b |
1535 | # Load color data from ROM |
1536 | # a0: CRAM base |
1537 | # a1: color list address |
1538 | # d0: number of colors to load |
1539 | # destroys d1 |
4db6e09f |
1540 | |
1541 | load_colors: |
0fc4f06b |
1542 | move.l d0,d1 |
1543 | CRAM_ADDR_var a0 |
1544 | move.l d0,(GFXCNTL).l |
4db6e09f |
1545 | |
0fc4f06b |
1546 | move.l #GFXDATA,a0 |
1547 | subq.w #1,d1 |
1548 | 0: |
1549 | move.w (a1)+,(a0) |
1550 | dbra d1,0b |
4db6e09f |
1551 | |
1552 | rts |
1553 | |
0fc4f06b |
1554 | |
1555 | # print |
1556 | # a0 - string |
1557 | # d0 - x |
1558 | # d1 - y |
4dfddc2f |
1559 | # d2 - tile_bits[15:11] |
0fc4f06b |
1560 | # destroys a1 |
570c4371 |
1561 | |
1562 | print: |
0fc4f06b |
1563 | move.l a0,a1 |
1286a1ba |
1564 | XY2NT |
0fc4f06b |
1565 | jsr load_prepare |
4dfddc2f |
1566 | move.l d2,d0 |
1567 | and.w #0xf800,d0 |
570c4371 |
1568 | |
1569 | _print_loop: |
0fc4f06b |
1570 | move.b (a1)+,d0 |
570c4371 |
1571 | beq _print_end |
1572 | |
0fc4f06b |
1573 | move.w d0,(a0) |
318e20ff |
1574 | bra _print_loop |
570c4371 |
1575 | |
1576 | _print_end: |
1577 | rts |
1578 | |
4db6e09f |
1579 | |
1286a1ba |
1580 | # print_hex |
1581 | # d0 - x |
1582 | # d1 - y |
1583 | # d2 - value |
27d5cc88 |
1584 | # d3 - tile_bits[15:11]|digit_cnt[7:0] |
4276cd7a |
1585 | # destroys a0, preserves d3 |
1286a1ba |
1586 | |
1587 | print_hex: |
1588 | XY2NT |
1589 | jsr load_prepare |
1590 | |
1591 | print_hex_preped: |
4276cd7a |
1592 | moveq.l #0,d0 |
1593 | move.b d3,d0 |
1594 | move.l d0,d1 |
1286a1ba |
1595 | lsl.b #2,d0 |
1596 | ror.l d0,d2 /* prep value */ |
4276cd7a |
1597 | subq.l #1,d1 /* count */ |
1598 | move.w d3,d0 |
1599 | and.w #0xf800,d0 /* keep upper bits in d0 */ |
1286a1ba |
1600 | |
1601 | _print_hex_loop: |
1602 | rol.l #4,d2 |
1603 | move.b d2,d0 |
1604 | and.b #0xf,d0 |
1286a1ba |
1605 | |
1606 | add.b #'0',d0 |
4276cd7a |
1607 | cmp.b #'9',d0 |
1608 | ble 0f |
1609 | addq.b #7,d0 |
1610 | 0: |
1286a1ba |
1611 | move.w d0,(a0) |
4276cd7a |
1612 | dbra d1,_print_hex_loop |
1286a1ba |
1613 | |
1614 | rts |
1615 | |
1616 | |
318e20ff |
1617 | # wait vertical sync interrupt |
4db6e09f |
1618 | |
1619 | wait_vsync: |
fbad1b76 |
1620 | move.b d7,d0 |
4db6e09f |
1621 | _wait_change: |
1622 | stop #0x2000 |
fbad1b76 |
1623 | cmp.b d7,d0 |
4db6e09f |
1624 | beq _wait_change |
1625 | rts |
1626 | |
1627 | |
318e20ff |
1628 | # wait vsync start (polling) |
1629 | # destroys a0,d0 |
1630 | |
1631 | wait_vsync_poll: |
1632 | move.l #GFXCNTL,a0 |
1633 | 0: |
1634 | move.w (a0),d0 |
1635 | and.b #8,d0 |
1636 | nop |
1637 | nop |
1638 | bne 0b |
1639 | 0: |
1640 | move.w (a0),d0 |
1641 | and.b #8,d0 |
1642 | nop |
1643 | nop |
1644 | beq 0b |
1645 | rts |
1646 | |
1647 | |
0da5ab5d |
1648 | .if COPY_TEST_CODE |
ff17c043 |
1649 | test_code: |
ff17c043 |
1650 | nop |
ff17c043 |
1651 | |
1652 | test_code_ret_op: |
1653 | jmp 0x123456 /* will be patched */ |
1654 | test_code_end: |
0da5ab5d |
1655 | .endif |
ff17c043 |
1656 | |
4db6e09f |
1657 | ################################################# |
1658 | # # |
1659 | # RAM DATA # |
1660 | # # |
1661 | ################################################# |
1662 | |
1663 | .bss |
570c4371 |
1664 | |
fbad1b76 |
1665 | # nothing :) |
4db6e09f |
1666 | |
1667 | .end |
1668 | |
1669 | # vim:filetype=asmM68k |