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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 |
34 | .equ RELOCATE_TO_RAM, 1 |
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35 | |
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36 | .text |
37 | .globl main |
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38 | .globl INT |
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39 | .globl VBL |
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40 | .globl return_to_main |
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41 | |
42 | ################################################## |
43 | # # |
44 | # Register and bitmask definitions # |
45 | # # |
46 | ################################################## |
47 | |
48 | .equ GFXDATA, 0xc00000 |
49 | .equ GFXCNTL, 0xc00004 |
50 | |
51 | .equ VDP0_E_HBI, 0x10 |
52 | .equ VDP0_E_DISPLAY, 0x02 |
53 | .equ VDP0_PLTT_FULL, 0x04 |
54 | |
55 | .equ VDP1_SMS_MODE, 0x80 |
56 | .equ VDP1_E_DISPLAY, 0x40 |
57 | .equ VDP1_E_VBI, 0x20 |
58 | .equ VDP1_E_DMA, 0x10 |
59 | .equ VDP1_NTSC, 0x00 |
60 | .equ VDP1_PAL, 0x08 |
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61 | .equ VDP1_MODE5, 0x04 |
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62 | |
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63 | .equ VDP12_STE, 0x08 |
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64 | .equ VDP12_SCREEN_V224, 0x00 |
65 | .equ VDP12_SCREEN_V448, 0x04 |
66 | .equ VDP12_PROGRESSIVE, 0x00 |
67 | .equ VDP12_INTERLACED, 0x02 |
68 | .equ VDP12_SCREEN_H256, 0x00 |
69 | .equ VDP12_SCREEN_H320, 0x81 |
70 | |
71 | .equ VDP16_MAP_V32, 0x00 |
72 | .equ VDP16_MAP_V64, 0x10 |
73 | .equ VDP16_MAP_V128, 0x30 |
74 | .equ VDP16_MAP_H32, 0x00 |
75 | .equ VDP16_MAP_H64, 0x01 |
76 | .equ VDP16_MAP_H128, 0x03 |
77 | |
4dfddc2f |
78 | .equ MMODE_MAIN, 0 |
79 | .equ MMODE_VAL_INPUT, 1 |
80 | .equ MMODE_EDIT_VAL, 2 |
81 | .equ MMODE_GOTO, 3 |
27d5cc88 |
82 | .equ MMODE_START_MENU, 4 |
83 | .equ MMODE_GOTO_PREDEF, 5 |
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84 | .equ MMODE_JMP_ADDR, 6 |
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85 | .equ MMODE_PC, 7 |
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86 | |
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87 | .equ predef_addr_cnt, ((predef_addrs_end-predef_addrs)/4) |
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88 | |
89 | ################################################## |
90 | # # |
91 | # MACROS # |
92 | # # |
93 | ################################################## |
94 | |
95 | |
27d5cc88 |
96 | # Write val to VDP register reg |
97 | .macro write_vdp_r_dst reg val dst |
98 | move.w #((\reg << 8) + 0x8000 + \val),\dst |
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99 | .endm |
100 | |
27d5cc88 |
101 | # Write val to VDP register reg, vdp addr in a3 |
102 | .macro write_vdp_reg reg val |
103 | write_vdp_r_dst \reg, \val, (a3) |
104 | .endm |
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105 | |
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106 | # Set up address in VDP, control port in dst |
107 | .macro VRAM_ADDR adr dst |
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108 | move.l #(0x40000000 | ((\adr & 0x3fff) << 16) | (\adr >> 14)),\dst |
109 | .endm |
110 | |
111 | .macro VSRAM_ADDR adr dst |
112 | move.l #(0x40000010 | ((\adr & 0x3fff) << 16) | (\adr >> 14)),\dst |
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113 | .endm |
114 | |
115 | |
116 | # make VDP word from address adr and store in d0 |
117 | .macro XRAM_ADDR_var adr |
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118 | move.l \adr,d0 |
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119 | lsl.l #8,d0 |
120 | lsl.l #8,d0 |
121 | rol.l #2,d0 |
122 | lsl.b #2,d0 |
123 | lsr.l #2,d0 |
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124 | .endm |
125 | |
126 | |
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127 | .macro VRAM_ADDR_var adr |
128 | XRAM_ADDR_var \adr |
129 | or.l #0x40000000,d0 |
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130 | .endm |
131 | |
132 | |
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133 | .macro CRAM_ADDR_var adr |
134 | XRAM_ADDR_var \adr |
135 | or.l #0xc0000000,d0 |
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136 | .endm |
137 | |
138 | |
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139 | # convert tile coords in d0, d1 to nametable addr to a0 |
140 | .macro XY2NT |
141 | lsl.w #6,d1 |
142 | add.w d1,d0 |
143 | lsl.w #1,d0 |
144 | movea.l #0xe000,a0 |
145 | add.w d0,a0 |
146 | .endm |
147 | |
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148 | # check if some d-pad button (and modifier) is pressed |
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149 | .macro do_dpad bit op val |
150 | btst.l #\bit,d0 |
151 | beq 0f |
152 | \op.l \val,a6 |
153 | bra dpad_end |
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154 | 0: |
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155 | .endm |
156 | |
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157 | # convert a6 to normal addr |
158 | # destroys d0 |
159 | .macro mk_a6_addr reg |
160 | move.l a6,\reg |
161 | moveq.l #0,d0 |
162 | move.b \reg,d0 |
163 | lsr.l #8,\reg |
164 | add.l d0,\reg |
165 | .endm |
166 | |
167 | .macro change_mode mode_new mode_back |
168 | and.w #0xc0ff,d7 |
169 | or.w #(\mode_back<<11)|(\mode_new<<8),d7 |
170 | .endm |
171 | |
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172 | # destroys a0,d0-d2 |
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173 | .macro menu_text str x y pal |
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174 | lea (\str,pc),a0 |
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175 | move.l #\x,d0 |
176 | move.l #\y,d1 |
177 | move.l #0x8000|(\pal<<13),d2 |
178 | jsr print |
179 | .endm |
180 | |
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181 | ################################################# |
182 | # # |
183 | # DATA # |
184 | # # |
185 | ################################################# |
186 | |
187 | colors: |
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188 | dc.w 0x0000,0x0eee,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
189 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
190 | dc.w 0x0000,0x02e2,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
191 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
192 | dc.w 0x0000,0x0e44,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
193 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
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194 | dc.w 0x0000,0x044e,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
195 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
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196 | colors_end: |
197 | |
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198 | |
199 | sprite_data: |
200 | /* Y size link attr X */ |
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201 | dc.w 0; dc.b 0x05; dc.b 0; dc.w 0x6002; dc.w 0 |
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202 | sprite_data_end: |
203 | |
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204 | predef_addrs: |
205 | dc.l 0x000000, 0x200000, 0x400000, 0xa00000, 0xa10000 |
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206 | dc.l 0xa11100, 0xa12000, 0xa13000, 0xa14000, 0xc00000 |
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207 | predef_addrs_end: |
208 | |
209 | safe_addrs: |
210 | dc.l 0x000000, 0x7fffff |
211 | dc.l 0xe00000, 0xffffff |
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212 | dc.l 0xa00000, 0xa100ff |
213 | dc.l 0xa11000, 0xa113ff |
214 | dc.l 0xa12000, 0xa120ff |
215 | dc.l 0xa13000, 0xa130ff |
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216 | safe_addrs_end: |
217 | |
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218 | txt_edit: |
219 | .ascii "- edit -\0" |
220 | txt_a_confirm: |
221 | .ascii "A-confirm\0" |
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222 | txt_about: |
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223 | .ascii "hexed r2\0" |
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224 | txt_goto: |
225 | .ascii "Go to address\0" |
226 | txt_goto_predef: |
227 | .ascii "Go to (predef)\0" |
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228 | txt_jmp_addr: |
229 | .ascii "Jump to address\0" |
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230 | txt_dump: |
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231 | .ascii "PC Transfer\0" |
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232 | txt_dtack: |
233 | .ascii "DTACK safety\0" |
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234 | txt_transfer_ready: |
235 | .ascii "Transfer Ready\0" |
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236 | txt_working: |
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237 | .ascii "PC mode \0" |
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238 | txt_dtack_err: |
239 | .ascii "DTACK err?\0" |
240 | txt_exc: |
241 | .ascii "Exception \0" |
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242 | |
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243 | ################################################## |
244 | # # |
245 | # MAIN PROGRAM # |
246 | # # |
247 | ################################################## |
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248 | |
249 | # global regs: |
250 | # a6 = page_start[31:8]|cursor_offs[7:0] |
251 | # d7 = old_inputs[31:16]|edit_bytes[15:14]|g_mode_old[13:11]|g_mode[10:8]|irq_cnt[7:0] |
252 | # d6 = edit_word_save[31:15]|edit_done[7]|no_dtack_detect[4]|autorep_cnt[3:0] |
253 | # d5 = main: tmp |
254 | # edit: edit_word[31:8]|edit_pos[4:2]|byte_cnt[1:0] |
255 | # menu: sel |
256 | |
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257 | .align 2 |
258 | |
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259 | main: |
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260 | /* make sure io port 2 is doing inputs */ |
261 | move.b #0,(0xa1000b).l |
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262 | /* mask irqs during init */ |
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263 | move.w #0x2700,sr |
264 | |
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265 | .if COPY_TO_EXP |
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266 | /* copy to expansion device if magic number is set */ |
267 | move.l #0x400000,a1 |
268 | cmp.w #0x1234,(a1) |
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269 | bne 0f |
270 | |
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271 | move.l #0,a0 |
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272 | move.w #0x2000/8-1,d0 |
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273 | 1: |
274 | move.l (a0)+,(a1)+ |
275 | move.l (a0)+,(a1)+ |
276 | dbra d0,1b |
277 | 0: |
278 | .endif |
279 | |
280 | .if RELOCATE_TO_RAM |
ff17c043 |
281 | /* we could be relocated by 32x or something else, adjust start addr */ |
282 | lea (pc),a0 |
283 | move.l a0,d0 |
284 | and.l #0xff0000,d0 |
285 | move.l d0,a0 |
286 | |
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287 | /* copy, assume 8K size */ |
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288 | move.l #0xFF0100,a1 |
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289 | move.w #0x2000/8-1,d0 |
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290 | 1: |
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291 | move.l (a0)+,(a1)+ |
292 | move.l (a0)+,(a1)+ |
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293 | dbra d0,1b |
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294 | |
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295 | /* copy test code */ |
296 | lea (test_code,pc),a0 |
297 | move.l #0xffc000,a1 |
298 | move.w #(test_code_end - test_code)/2-1,d0 |
299 | 1: |
300 | move.w (a0)+,(a1)+ |
301 | dbra d0,1b |
302 | |
318e20ff |
303 | lea (0f,pc),a0 |
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304 | move.l a0,d0 |
305 | and.l #0x00ffff,d0 |
306 | add.l #0xFF0100,d0 |
307 | move.l d0,a0 |
308 | |
309 | /* patch test code */ |
310 | move.l #0xffc000,a1 |
311 | add.w #(test_code_ret_op-test_code+2),a1 |
312 | move.l a0,(a1) |
313 | |
318e20ff |
314 | jmp (a0) |
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315 | 0: |
316 | .endif |
317 | |
1286a1ba |
318 | movea.l #0,a6 |
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319 | move.l #0x8000,d7 |
fbad1b76 |
320 | moveq.l #0,d6 |
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321 | |
322 | /* Init pads */ |
323 | move.b #0x40,(0xa10009).l |
324 | move.b #0x40,(0xa10003).l |
325 | |
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326 | /* Initialize VDP */ |
327 | jsr init_gfx |
328 | |
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329 | /* Clear h/v scroll */ |
330 | movea.l #GFXDATA,a0 |
331 | VRAM_ADDR 0x8000,(GFXCNTL) |
332 | move.l #0,(a0) |
333 | VSRAM_ADDR 0,(GFXCNTL) |
334 | move.l #0,(a0) |
335 | |
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336 | /* Load color data */ |
0fc4f06b |
337 | movea.l #0,a0 |
318e20ff |
338 | lea (colors,pc),a1 |
0fc4f06b |
339 | moveq.l #(colors_end-colors)/2,d0 |
4db6e09f |
340 | jsr load_colors |
341 | |
d90ff128 |
342 | /* load font patterns */ |
318e20ff |
343 | movea.l #GFXDATA,a0 |
344 | lea (font,pc),a1 |
d90ff128 |
345 | VRAM_ADDR 0,(GFXCNTL) |
346 | move.w #128*8,d3 |
347 | font_loop: |
348 | moveq.l #8-1,d2 |
349 | moveq.l #0,d1 |
350 | move.b (a1)+,d0 |
351 | 0: |
352 | lsr.b #1,d0 |
353 | roxl.l #1,d1 |
354 | ror.l #5,d1 |
355 | dbra d2,0b |
356 | |
357 | rol.l #1,d1 /* fixup */ |
358 | move.l d1,(a0) |
359 | dbra d3,font_loop |
4db6e09f |
360 | |
361 | /* generate A layer map */ |
1286a1ba |
362 | movea.l #0xe000,a1 |
4db6e09f |
363 | move.l #28-1,d4 |
364 | lmaploop0: |
1286a1ba |
365 | movea.l a1,a0 |
4db6e09f |
366 | jsr load_prepare |
367 | |
570c4371 |
368 | move.l #64/2-1,d3 |
0fc4f06b |
369 | 0: move.l #0x00000000,(a0) |
4db6e09f |
370 | dbra d3,0b |
371 | |
1286a1ba |
372 | add.l #64*2,a1 |
4db6e09f |
373 | dbra d4,lmaploop0 |
374 | |
375 | /* generate B layer map */ |
0fc4f06b |
376 | movea.l #0xc000,a0 |
4db6e09f |
377 | jsr load_prepare |
378 | |
570c4371 |
379 | move.l #64*28/2-1,d3 |
0fc4f06b |
380 | 0: move.l #0x00000000,(a0) |
4db6e09f |
381 | dbra d3,0b |
382 | |
383 | /* upload sprite data */ |
0fc4f06b |
384 | movea.l #0xfc00,a0 |
4db6e09f |
385 | jsr load_prepare |
318e20ff |
386 | lea (sprite_data,pc),a1 |
4db6e09f |
387 | |
388 | move.l #(sprite_data_end-sprite_data)/2-1,d3 |
0fc4f06b |
389 | 0: move.l (a1)+,(a0) |
4db6e09f |
390 | dbra d3,0b |
391 | |
318e20ff |
392 | .if USE_VINT |
d4279640 |
393 | /* wait for vsync before unmask */ |
318e20ff |
394 | jsr wait_vsync_poll |
d4279640 |
395 | |
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396 | /* wait a bit to avoid nested vint */ |
397 | move.w #20,d0 |
398 | 0: |
399 | dbra d0,0b /* 10 cycles to go back */ |
400 | |
318e20ff |
401 | /* enable and unmask vint */ |
402 | write_vdp_r_dst 1,(VDP1_E_VBI | VDP1_E_DISPLAY | VDP1_MODE5),(GFXCNTL) |
74d5977b |
403 | move.w #0x2000,sr |
318e20ff |
404 | .endif |
570c4371 |
405 | |
4db6e09f |
406 | ################################################## |
1286a1ba |
407 | |
4db6e09f |
408 | forever: |
318e20ff |
409 | .if USE_VINT |
4db6e09f |
410 | jsr wait_vsync |
318e20ff |
411 | .else |
412 | jsr wait_vsync_poll |
413 | jsr VBL |
414 | .endif |
4db6e09f |
415 | bra forever |
4db6e09f |
416 | |
417 | |
d4279640 |
418 | INT: |
419 | /* let's hope VRAM is already set up.. */ |
318e20ff |
420 | lea (txt_exc,pc),a0 |
d4279640 |
421 | move.l #9,d0 |
422 | move.l #27,d1 |
423 | move.l #0xe000,d2 |
424 | jsr print |
425 | bra forever |
426 | |
427 | ################################################## |
428 | |
1286a1ba |
429 | VBL: |
fbad1b76 |
430 | addq.b #1,d7 |
d90ff128 |
431 | # movem.l d0-d4/a0-a5,-(a7) |
1286a1ba |
432 | |
8689c962 |
433 | btst.b #5,(0xa10005).l |
434 | bne no_auto_transfer |
435 | change_mode MMODE_PC, MMODE_MAIN |
436 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
437 | |
438 | no_auto_transfer: |
fbad1b76 |
439 | moveq.l #0,d0 |
440 | move.w d7,d0 |
441 | lsr.w #6,d0 |
442 | and.w #0x1c,d0 |
318e20ff |
443 | lea (jumptab,pc,d0),a0 |
fbad1b76 |
444 | jmp (a0) |
445 | jumptab: |
272bd2ec |
446 | /* branch insns here because we want to be position independent */ |
318e20ff |
447 | bra mode_main |
448 | bra mode_val_input |
449 | bra mode_edit_val /* edit val in editor */ |
450 | bra mode_goto |
451 | bra mode_start_menu |
452 | bra mode_goto_predef |
453 | bra mode_jmp_addr |
80560599 |
454 | bra mode_transfer |
fbad1b76 |
455 | |
456 | ##################### main ####################### |
457 | |
458 | mode_main: |
d4279640 |
459 | /* assume we will hang */ |
318e20ff |
460 | lea (txt_dtack_err,pc),a0 |
d4279640 |
461 | move.l #9,d0 |
462 | move.l #27,d1 |
463 | move.l #0xe000,d2 |
464 | jsr print |
465 | |
466 | moveq.l #0,d1 |
1286a1ba |
467 | move.l a6,d0 |
4276cd7a |
468 | move.b d0,d1 |
1286a1ba |
469 | lsr.l #8,d0 |
470 | move.l d0,a1 /* current addr */ |
4276cd7a |
471 | lsr.b #3,d1 |
472 | neg.b d1 |
473 | add.b #27-1,d1 /* line where the cursor sits */ |
474 | swap d1 |
1286a1ba |
475 | |
27d5cc88 |
476 | movea.l #0xe002,a2 |
4276cd7a |
477 | move.l #27-1,d5 /* line counter for dbra */ |
478 | or.l d1,d5 |
1286a1ba |
479 | |
27d5cc88 |
480 | draw_row: |
1286a1ba |
481 | move.l a2,a0 |
482 | jsr load_prepare |
483 | |
27d5cc88 |
484 | btst.l #15,d7 |
485 | beq 0f |
486 | move.w #' ',(a0) |
487 | 0: |
1286a1ba |
488 | /* addr */ |
489 | move.l a1,d2 |
490 | moveq.l #6,d3 |
491 | jsr print_hex_preped |
492 | |
27d5cc88 |
493 | btst.l #4,d6 |
494 | bne draw_row_safe |
495 | |
d4279640 |
496 | bsr get_safety_mask |
497 | cmp.b #0xf,d0 |
498 | beq draw_row_safe |
27d5cc88 |
499 | |
d4279640 |
500 | # unsafe or partially safe |
501 | draw_row_hsafe: |
502 | move.l d0,d4 |
503 | swap d4 /* mask in upper word */ |
27d5cc88 |
504 | btst.l #15,d7 |
d4279640 |
505 | bne draw_row_hsafe_words_pre |
27d5cc88 |
506 | |
d4279640 |
507 | draw_row_hsafe_bytes_pre: |
27d5cc88 |
508 | /* 8 bytes */ |
d4279640 |
509 | moveq.l #2,d3 |
510 | move.w #3,d4 |
511 | |
512 | draw_row_hsafe_bytes: |
27d5cc88 |
513 | move.w #' ',(a0) |
d4279640 |
514 | move.b d4,d0 |
515 | add.b #16,d0 |
516 | btst.l d0,d4 |
517 | bne 0f |
27d5cc88 |
518 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
519 | move.w #' ',(a0) |
520 | move.l #'?'|('?'<<16),(a0) |
521 | bra 1f |
522 | 0: |
523 | move.b (0,a1),d2 |
524 | jsr print_hex_preped |
525 | move.w #' ',(a0) |
526 | move.b (1,a1),d2 |
527 | jsr print_hex_preped |
528 | 1: |
529 | addq.l #2,a1 |
530 | dbra d4,draw_row_hsafe_bytes |
27d5cc88 |
531 | |
532 | move.w #' ',(a0) |
533 | |
534 | move.l d5,d0 |
535 | swap d0 |
536 | cmp.w d5,d0 |
537 | beq draw_cursor_unsafe_byte |
d4279640 |
538 | bra draw_chars_hsafe_pre |
27d5cc88 |
539 | |
d4279640 |
540 | draw_row_hsafe_words_pre: |
27d5cc88 |
541 | /* 4 shorts */ |
d4279640 |
542 | moveq.l #4,d3 |
543 | move.w #3,d4 |
544 | |
545 | draw_row_hsafe_words: |
27d5cc88 |
546 | move.w #' ',(a0) |
d4279640 |
547 | move.b d4,d0 |
548 | add.b #16,d0 |
549 | btst.l d0,d4 |
550 | bne 0f |
27d5cc88 |
551 | move.l #'?'|('?'<<16),(a0) |
552 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
553 | bra 1f |
554 | 0: |
555 | move.w (a1),d2 |
556 | jsr print_hex_preped |
557 | 1: |
558 | addq.l #2,a1 |
559 | dbra d4,draw_row_hsafe_words |
27d5cc88 |
560 | |
561 | move.l #(' '<<16)|' ',(a0) |
562 | |
563 | move.l d5,d0 |
564 | swap d0 |
565 | cmp.w d5,d0 |
566 | beq draw_cursor_unsafe_word |
567 | |
d4279640 |
568 | draw_chars_hsafe_pre: |
569 | subq.l #8,a1 |
570 | move.w #3,d4 |
571 | moveq.l #0,d0 |
572 | |
573 | draw_chars_hsafe: |
574 | move.b d4,d0 |
575 | add.b #16,d0 |
576 | btst.l d0,d4 |
577 | bne 0f |
27d5cc88 |
578 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
579 | bra draw_chars_hsafe_next |
580 | 0: |
581 | btst.l #15,d7 /* must perform correct read type */ |
582 | bne 0f /* doing byte reads on security reg hangs */ |
583 | move.b (0,a1),d0 |
584 | lsl.l #8,d0 |
585 | move.b (1,a1),d0 |
586 | bra 1f |
587 | 0: |
588 | move.w (a1),d0 |
589 | 1: |
590 | ror.l #8,d0 |
591 | move.b d0,d1 |
592 | sub.b #0x20,d1 |
593 | cmp.b #0x60,d1 |
594 | blo 0f |
595 | move.b #'.',d0 |
596 | 0: |
597 | move.w d0,(a0) |
598 | |
599 | move.b #0,d0 |
600 | rol.l #8,d0 |
601 | move.b d0,d1 |
602 | sub.b #0x20,d1 |
603 | cmp.b #0x60,d1 |
604 | blo 0f |
605 | move.b #'.',d0 |
606 | 0: |
607 | move.w d0,(a0) |
608 | |
609 | draw_chars_hsafe_next: |
610 | addq.l #2,a1 |
611 | dbra d4,draw_chars_hsafe |
27d5cc88 |
612 | |
613 | move.l #(' '<<16)|' ',(a0) |
27d5cc88 |
614 | add.w #0x80,a2 |
615 | dbra d5,draw_row |
616 | bra draw_status_bar |
617 | |
618 | |
619 | # normal draw |
620 | draw_row_safe: |
621 | btst.l #15,d7 |
622 | bne draw_row_words |
623 | |
624 | draw_row_bytes: |
625 | /* 8 bytes */ |
626 | moveq.l #2,d3 |
627 | moveq.l #8-1,d4 |
628 | draw_bytes: |
629 | move.w #' ',(a0) |
630 | move.b (a1)+,d2 |
631 | jsr print_hex_preped |
632 | dbra d4,draw_bytes |
633 | |
634 | move.w #' ',(a0) |
635 | |
636 | move.l d5,d0 |
637 | swap d0 |
638 | cmp.w d5,d0 |
639 | beq draw_cursor_byte |
640 | bra draw_chars_pre |
641 | |
642 | draw_row_words: |
1286a1ba |
643 | /* 4 shorts */ |
4276cd7a |
644 | moveq.l #4,d3 |
1286a1ba |
645 | moveq.l #4-1,d4 |
27d5cc88 |
646 | draw_words: |
1286a1ba |
647 | move.w #' ',(a0) |
648 | move.w (a1)+,d2 |
1286a1ba |
649 | jsr print_hex_preped |
27d5cc88 |
650 | dbra d4,draw_words |
651 | |
652 | move.l #(' '<<16)|' ',(a0) |
1286a1ba |
653 | |
4276cd7a |
654 | move.l d5,d0 |
655 | swap d0 |
656 | cmp.w d5,d0 |
27d5cc88 |
657 | beq draw_cursor_word |
4276cd7a |
658 | |
659 | draw_chars_pre: |
1286a1ba |
660 | /* 8 chars */ |
661 | subq.l #8,a1 |
662 | moveq.l #8-1,d4 |
663 | draw_chars: |
664 | move.b (a1)+,d0 |
665 | move.b d0,d1 |
666 | sub.b #0x20,d1 |
667 | cmp.b #0x60,d1 |
668 | blo 0f |
669 | move.w #'.',d0 |
670 | 0: |
671 | move.w d0,(a0) |
672 | dbra d4,draw_chars |
673 | |
27d5cc88 |
674 | move.l #(' '<<16)|' ',(a0) |
675 | |
1286a1ba |
676 | add.w #0x80,a2 |
27d5cc88 |
677 | dbra d5,draw_row |
1286a1ba |
678 | |
d4279640 |
679 | |
27d5cc88 |
680 | draw_status_bar: |
4276cd7a |
681 | /* status bar */ |
27d5cc88 |
682 | move.l a2,a0 |
4276cd7a |
683 | jsr load_prepare |
27d5cc88 |
684 | |
685 | btst.l #15,d7 |
686 | beq 0f |
687 | move.w #' ',(a0) |
688 | 0: |
4dfddc2f |
689 | mk_a6_addr d2 |
4276cd7a |
690 | move.l #0x4006,d3 |
691 | jsr print_hex_preped |
d4279640 |
692 | |
693 | /* clear error */ |
694 | moveq.l #5-1,d0 |
695 | 0: |
696 | move.l #' '|(' '<<16),(a0) |
697 | move.l #' '|(' '<<16),(a0) |
698 | dbra d0,0b |
699 | |
4276cd7a |
700 | |
1286a1ba |
701 | /* handle input */ |
702 | jsr get_input /* x0cbrldu x1sa00du */ |
1286a1ba |
703 | |
fbad1b76 |
704 | btst.l #16+4,d0 /* A - scroll modifier */ |
705 | beq input_noa |
706 | |
707 | do_dpad 16+0, sub, #0x0800 |
708 | do_dpad 16+1, add, #0x0800 |
709 | do_dpad 16+10, sub, #0xd800 |
710 | do_dpad 16+11, add, #0xd800 |
711 | input_noa: |
712 | moveq.l #0,d1 |
4dfddc2f |
713 | move.w d7,d1 |
714 | lsr.w #7,d1 |
715 | lsr.w #7,d1 |
fbad1b76 |
716 | |
717 | do_dpad 0, subq, #0x0008 |
718 | do_dpad 1, addq, #0x0008 |
719 | do_dpad 10, sub, d1 |
720 | do_dpad 11, add, d1 |
721 | |
722 | dpad_end: |
4dfddc2f |
723 | /* update addr */ |
724 | move.l a6,d1 |
725 | cmp.b #0xf0,d1 |
726 | blo 0f |
727 | sub.l #0xd800,a6 |
728 | add.w #0x00d8,a6 |
729 | bra 1f |
730 | 0: |
731 | cmp.b #0xd8,d1 |
732 | blo 1f |
733 | add.l #0xd800,a6 |
734 | sub.w #0x00d8,a6 |
735 | 1: |
736 | |
737 | /* other btns */ |
fbad1b76 |
738 | moveq.l #0,d1 |
739 | btst.l #12,d0 /* B - switch byte/word mode */ |
740 | beq input_nob |
4dfddc2f |
741 | bclr.l #15,d7 |
742 | add.w #0x4000,d7 /* changes between 01 10 */ |
fbad1b76 |
743 | move.l a6,d1 |
744 | and.l #1,d1 |
745 | sub.l d1,a6 /* make even, just in case */ |
746 | |
747 | input_nob: |
748 | btst.l #13,d0 /* C - edit selected byte */ |
749 | beq input_noc |
4dfddc2f |
750 | |
751 | change_mode MMODE_EDIT_VAL, MMODE_MAIN |
27d5cc88 |
752 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
fbad1b76 |
753 | |
754 | input_noc: |
27d5cc88 |
755 | btst.l #5,d0 /* Start - menu */ |
4dfddc2f |
756 | beq input_nos |
757 | |
27d5cc88 |
758 | moveq.l #0,d5 |
759 | change_mode MMODE_START_MENU, MMODE_MAIN |
760 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
1286a1ba |
761 | |
4dfddc2f |
762 | input_nos: |
fbad1b76 |
763 | vbl_end: |
d90ff128 |
764 | # movem.l (a7)+,d0-d4/a0-a5 |
318e20ff |
765 | .if USE_VINT |
1286a1ba |
766 | rte |
318e20ff |
767 | .else |
768 | rts |
769 | .endif |
1286a1ba |
770 | |
771 | |
27d5cc88 |
772 | draw_cursor_unsafe_byte: |
773 | move.l a6,d0 |
774 | and.l #7,d0 /* byte offs */ |
775 | move.b d0,d1 |
776 | add.b d0,d0 |
777 | add.b d1,d0 /* d0 *= 3 (chars) */ |
778 | add.b d0,d0 |
779 | lea (7*2,a2,d0),a0 |
780 | jsr load_prepare |
781 | move.l #(0x2000|'?'|((0x2000|'?')<<16)),(a0) |
782 | |
783 | move.l a2,a0 |
784 | add.w #31*2,a0 |
785 | jsr load_prepare /* restore a0 */ |
318e20ff |
786 | bra draw_chars_hsafe_pre |
27d5cc88 |
787 | |
788 | draw_cursor_unsafe_word: |
4276cd7a |
789 | move.l a6,d0 |
790 | and.l #7,d0 /* byte offs */ |
791 | move.l d0,d1 |
792 | lsr.b #1,d1 /* which word */ |
793 | move.b d1,d2 |
794 | lsl.b #2,d2 |
795 | add.b d2,d1 /* num of chars to skip */ |
27d5cc88 |
796 | add.b d1,d1 |
797 | |
798 | lea (8*2,a2,d1),a0 |
799 | jsr load_prepare |
800 | move.l #(0x2000|'?'|((0x2000|'?')<<16)),d0 |
801 | move.l d0,(a0) |
802 | move.l d0,(a0) |
803 | |
804 | move.l a2,a0 |
805 | add.w #29*2,a0 |
806 | jsr load_prepare /* restore a0 */ |
318e20ff |
807 | bra draw_chars_hsafe_pre |
4276cd7a |
808 | |
4276cd7a |
809 | |
fbad1b76 |
810 | draw_cursor_byte: |
27d5cc88 |
811 | move.l a6,d0 |
812 | and.l #7,d0 /* byte offs */ |
813 | move.w #0x2002,d3 |
814 | |
fbad1b76 |
815 | move.b (-8,a1,d0),d2 |
27d5cc88 |
816 | move.b d0,d1 |
817 | add.b d0,d0 |
818 | add.b d1,d0 /* d0 *= 3 (chars) */ |
819 | add.b d0,d0 |
820 | lea (7*2,a2,d0),a0 |
821 | jsr load_prepare |
822 | jsr print_hex_preped |
823 | |
824 | move.l a2,a0 |
825 | add.w #31*2,a0 |
826 | jsr load_prepare /* restore a0 */ |
827 | |
318e20ff |
828 | bra draw_chars_pre |
fbad1b76 |
829 | |
830 | draw_cursor_word: |
27d5cc88 |
831 | move.l a6,d0 |
832 | and.l #7,d0 /* byte offs */ |
833 | move.l d0,d1 |
834 | lsr.b #1,d1 /* which word */ |
835 | move.b d1,d2 |
836 | lsl.b #2,d2 |
837 | add.b d2,d1 /* num of chars to skip */ |
838 | add.b d1,d1 |
839 | move.w #0x2004,d3 |
840 | |
fbad1b76 |
841 | move.w (-8,a1,d0),d2 |
27d5cc88 |
842 | lea (8*2,a2,d1),a0 |
4276cd7a |
843 | jsr load_prepare |
4276cd7a |
844 | jsr print_hex_preped |
845 | |
846 | move.l a2,a0 |
27d5cc88 |
847 | add.w #29*2,a0 |
4276cd7a |
848 | jsr load_prepare /* restore a0 */ |
849 | |
318e20ff |
850 | bra draw_chars_pre |
4276cd7a |
851 | |
852 | |
4dfddc2f |
853 | #################### hedit ####################### |
854 | |
855 | mode_edit_val: |
856 | btst.l #7,d6 |
857 | bne mode_hedit_finish |
858 | |
859 | /* read val to edit */ |
5f6473d9 |
860 | moveq.l #0,d5 |
4dfddc2f |
861 | mk_a6_addr d1 |
862 | move.l d1,a0 |
4dfddc2f |
863 | btst.l #15,d7 |
864 | bne 0f |
5f6473d9 |
865 | move.b (a0),d5 |
866 | lsl.l #8,d5 |
867 | or.b #1,d5 |
4dfddc2f |
868 | bra 1f |
869 | 0: |
5f6473d9 |
870 | move.w (a0),d5 |
871 | lsl.l #8,d5 |
872 | or.b #2,d5 |
4dfddc2f |
873 | 1: |
4dfddc2f |
874 | |
4dfddc2f |
875 | change_mode MMODE_VAL_INPUT, MMODE_EDIT_VAL |
318e20ff |
876 | bra vbl_end |
4dfddc2f |
877 | |
878 | mode_hedit_finish: |
879 | /* write the val */ |
880 | mk_a6_addr d1 |
881 | move.l d1,a0 |
5f6473d9 |
882 | lsr.l #8,d5 |
4dfddc2f |
883 | |
884 | btst.l #15,d7 |
885 | bne 0f |
5f6473d9 |
886 | move.b d5,(a0) |
4dfddc2f |
887 | bra 1f |
888 | 0: |
5f6473d9 |
889 | move.w d5,(a0) |
4dfddc2f |
890 | 1: |
891 | |
4dfddc2f |
892 | bra return_to_main |
893 | |
894 | ##################### goto ####################### |
895 | |
896 | mode_goto: |
897 | btst.l #7,d6 |
898 | bne mode_goto_finish |
fbad1b76 |
899 | |
5f6473d9 |
900 | moveq.l #0,d5 |
901 | swap d6 |
902 | move.w d6,d5 |
903 | swap d6 |
904 | swap d5 |
905 | or.b #3,d5 /* 3 bytes */ |
4dfddc2f |
906 | bclr.l #7,d6 |
907 | change_mode MMODE_VAL_INPUT, MMODE_GOTO |
318e20ff |
908 | bra vbl_end |
4dfddc2f |
909 | |
910 | mode_goto_finish: |
5f6473d9 |
911 | lsr.l #8,d5 |
912 | move.l d5,d0 |
4dfddc2f |
913 | move.l d0,d1 |
914 | and.l #7,d1 |
915 | and.b #0xf8,d0 |
916 | lsl.l #8,d0 |
917 | or.l d1,d0 |
918 | move.l d0,a6 |
919 | |
5f6473d9 |
920 | lsr.l #8,d5 |
921 | swap d6 |
922 | move.w d5,d6 |
923 | swap d6 |
924 | |
4dfddc2f |
925 | bra return_to_main |
926 | |
927 | ################### val edit ##################### |
928 | |
929 | mode_val_input: |
930 | /* frame */ |
931 | movea.l #0xe000+14*2+11*64*2,a1 |
932 | moveq.l #6-1,d1 |
933 | 0: |
934 | move.w a1,a0 |
935 | jsr load_prepare |
936 | moveq.l #11-1,d0 |
937 | 1: |
938 | move.w #0,(a0) |
939 | dbra d0,1b |
940 | |
941 | add.w #64*2,a1 |
942 | dbra d1,0b |
943 | |
944 | /* text */ |
318e20ff |
945 | lea (txt_edit,pc),a0 |
4dfddc2f |
946 | move.l #15,d0 |
947 | move.l #11,d1 |
948 | move.l #0xc000,d2 |
949 | jsr print |
950 | |
318e20ff |
951 | lea (txt_a_confirm,pc),a0 |
4dfddc2f |
952 | move.l #15,d0 |
953 | move.l #15,d1 |
954 | move.l #0xc000,d2 |
955 | jsr print |
956 | |
957 | /* edit field */ |
958 | moveq.l #0,d0 |
959 | moveq.l #0,d1 |
960 | moveq.l #0,d3 |
5f6473d9 |
961 | move.b d5,d3 |
962 | and.b #3,d3 /* edit field bytes */ |
4dfddc2f |
963 | |
964 | move.b #19,d0 |
965 | sub.b d3,d0 |
966 | move.b #13,d1 |
5f6473d9 |
967 | move.l d5,d2 |
4dfddc2f |
968 | lsr.l #8,d2 |
969 | add.b d3,d3 |
970 | or.w #0x8000,d3 |
971 | jsr print_hex |
972 | |
973 | /* current char */ |
974 | moveq.l #0,d0 |
975 | moveq.l #0,d1 |
976 | |
977 | and.w #6,d3 |
978 | move.b #19,d0 |
979 | move.b d3,d1 |
980 | lsr.b #1,d1 /* length in bytes */ |
981 | sub.b d1,d0 |
5f6473d9 |
982 | move.b d5,d1 |
983 | lsr.b #2,d1 |
4dfddc2f |
984 | and.b #7,d1 /* nibble to edit */ |
985 | add.b d1,d0 |
986 | |
987 | sub.b d1,d3 |
988 | sub.b #1,d3 /* chars to shift out */ |
989 | lsl.b #2,d3 |
990 | add.b #8,d3 |
5f6473d9 |
991 | move.l d5,d2 |
4dfddc2f |
992 | lsr.l d3,d2 |
993 | |
994 | move.b #13,d1 |
995 | move.w #0xa001,d3 |
996 | jsr print_hex |
997 | |
998 | /* handle input */ |
999 | jsr get_input /* x0cbrldu x1sa00du */ |
1000 | |
1001 | move.w d0,d1 |
1002 | and.w #0x0f00,d1 |
1003 | beq ai_no_dpad |
5f6473d9 |
1004 | move.b d5,d1 |
1005 | and.b #3,d1 |
4dfddc2f |
1006 | add.b d1,d1 /* nibble count */ |
1007 | sub.b #1,d1 /* max n.t.e. val */ |
5f6473d9 |
1008 | move.b d5,d2 |
1009 | lsr.b #2,d2 |
4dfddc2f |
1010 | and.b #7,d2 /* nibble to edit */ |
1011 | |
1012 | move.b d0,d3 |
1013 | and.b #3,d3 |
1014 | beq ai_no_ud |
1015 | moveq.l #0,d3 |
1016 | moveq.l #0,d4 |
1017 | move.b #0xf,d3 |
1018 | move.b #0x1,d4 |
1019 | sub.b d2,d1 |
1020 | lsl.b #2,d1 |
1021 | add.b #8,d1 |
1022 | lsl.l d1,d3 /* mask */ |
1023 | lsl.l d1,d4 /* what to add/sub */ |
5f6473d9 |
1024 | move.l d5,d1 |
4dfddc2f |
1025 | and.l d3,d1 |
1026 | btst.l #8,d0 |
1027 | beq 0f |
1028 | add.l d4,d1 |
1029 | bra 1f |
1030 | 0: |
1031 | sub.l d4,d1 |
1032 | 1: |
1033 | and.l d3,d1 |
1034 | eor.l #0xffffffff,d3 |
5f6473d9 |
1035 | and.l d3,d5 |
1036 | or.l d1,d5 |
318e20ff |
1037 | bra vbl_end |
4dfddc2f |
1038 | |
1039 | ai_no_ud: |
1040 | btst.l #10,d0 |
1041 | bne 0f |
1042 | add.b #1,d2 |
1043 | bra 1f |
1044 | 0: |
1045 | sub.b #1,d2 |
1046 | 1: |
1047 | cmp.b #0,d2 |
1048 | bge 0f |
1049 | move.b d1,d2 |
1050 | 0: |
1051 | cmp.b d1,d2 |
1052 | ble 0f |
1053 | move.b #0,d2 |
1054 | 0: |
5f6473d9 |
1055 | and.b #0xe3,d5 |
1056 | lsl.b #2,d2 |
1057 | or.b d2,d5 |
318e20ff |
1058 | bra vbl_end |
4dfddc2f |
1059 | |
1060 | ai_no_dpad: |
1061 | move.w d0,d1 |
1062 | and.w #0x1020,d1 |
1063 | beq ai_no_sb |
1064 | |
4dfddc2f |
1065 | bra return_to_main |
1066 | |
1067 | ai_no_sb: |
5f6473d9 |
1068 | btst.l #4,d0 /* A - confirm */ |
4dfddc2f |
1069 | beq ai_no_input |
1070 | bset.l #7,d6 |
5f6473d9 |
1071 | move.w d7,d1 /* back to prev mode */ |
4dfddc2f |
1072 | and.w #0x3800,d1 |
1073 | lsr.w #3,d1 |
1074 | and.w #0xc0ff,d7 |
1075 | or.w d1,d7 |
1076 | |
1077 | ai_no_input: |
318e20ff |
1078 | bra vbl_end |
4dfddc2f |
1079 | |
1080 | |
27d5cc88 |
1081 | ################### start menu ################### |
1082 | |
1083 | mode_start_menu: |
1084 | /* frame */ |
1085 | bsr start_menu_box |
1086 | |
1087 | /* text */ |
1088 | menu_text txt_about, 13, 9, 1 |
1089 | menu_text txt_goto, 13, 11, 0 |
1090 | menu_text txt_goto_predef, 13, 12, 0 |
d90ff128 |
1091 | menu_text txt_jmp_addr, 13, 13, 0 |
80560599 |
1092 | menu_text txt_dump, 13, 14, 0 |
1093 | menu_text txt_dtack, 13, 15, 0 |
1094 | menu_text txt_a_confirm, 13, 17, 2 |
27d5cc88 |
1095 | |
1096 | /* dtack safety on/off */ |
80560599 |
1097 | movea.l #0xe000+26*2+15*64*2,a0 |
27d5cc88 |
1098 | jsr load_prepare |
1099 | move.w #0x8000|'O',(a0) |
1100 | btst.l #4,d6 |
1101 | bne 0f |
1102 | move.w #0x8000|'N',(a0) |
1103 | bra 1f |
1104 | 0: |
1105 | move.w #0x8000|'F',(a0) |
1106 | move.w #0x8000|'F',(a0) |
1107 | 1: |
1108 | |
1109 | /* cursor */ |
1110 | movea.l #0xe000+11*2+11*64*2,a0 |
1111 | moveq.l #0,d0 |
1112 | move.b d5,d0 |
80560599 |
1113 | and.b #7,d0 |
27d5cc88 |
1114 | lsl.w #7,d0 |
1115 | add.w d0,a0 |
1116 | jsr load_prepare |
1117 | move.w #'>',(a0) |
1118 | |
1119 | /* input */ |
1120 | jsr get_input /* x0cbrldu x1sa00du */ |
1121 | |
1122 | move.w d0,d1 |
1123 | and.w #3,d1 |
1124 | beq msm_no_ud |
1125 | move.b d5,d1 |
80560599 |
1126 | and.b #7,d1 |
27d5cc88 |
1127 | btst.l #0,d0 |
1128 | sne d2 |
1129 | or.b #1,d2 /* up -1, down 1 */ |
1130 | add.b d2,d1 |
1131 | cmp.b #0,d1 |
1132 | bge 0f |
80560599 |
1133 | move.b #4,d1 |
27d5cc88 |
1134 | 0: |
80560599 |
1135 | cmp.b #4,d1 |
27d5cc88 |
1136 | ble 0f |
1137 | move.b #0,d1 |
1138 | 0: |
80560599 |
1139 | and.b #0xf8,d5 |
27d5cc88 |
1140 | or.b d1,d5 |
318e20ff |
1141 | bra vbl_end |
27d5cc88 |
1142 | |
1143 | msm_no_ud: |
1144 | btst.l #4,d0 /* A - confirm */ |
1145 | beq msm_no_a |
1146 | move.b d5,d1 |
80560599 |
1147 | and.b #7,d1 |
27d5cc88 |
1148 | bne 0f |
1149 | change_mode MMODE_GOTO, MMODE_MAIN |
1150 | bsr start_menu_box |
318e20ff |
1151 | bra vbl_end |
27d5cc88 |
1152 | 0: |
1153 | cmp.b #1,d1 |
1154 | bne 0f |
1155 | moveq.l #0,d5 |
1156 | change_mode MMODE_GOTO_PREDEF, MMODE_MAIN |
1157 | bsr start_menu_box |
318e20ff |
1158 | bra vbl_end |
27d5cc88 |
1159 | 0: |
1160 | cmp.b #2,d1 |
1161 | bne 0f |
d90ff128 |
1162 | change_mode MMODE_JMP_ADDR, MMODE_MAIN |
1163 | bsr start_menu_box |
318e20ff |
1164 | bra vbl_end |
d90ff128 |
1165 | 0: |
1166 | cmp.b #3,d1 |
1167 | bne 0f |
8689c962 |
1168 | change_mode MMODE_PC, MMODE_MAIN |
80560599 |
1169 | bsr start_menu_box |
1170 | bra vbl_end |
1171 | 0: |
1172 | cmp.b #4,d1 |
1173 | bne 0f |
27d5cc88 |
1174 | bchg.l #4,d6 |
318e20ff |
1175 | bra vbl_end |
27d5cc88 |
1176 | 0: |
1177 | |
1178 | msm_no_a: |
1179 | move.w d0,d1 |
1180 | and.w #0x3000,d1 |
1181 | beq msm_no_bc |
1182 | bra return_to_main |
1183 | |
1184 | msm_no_bc: |
318e20ff |
1185 | bra vbl_end |
27d5cc88 |
1186 | |
1187 | start_menu_box: |
1188 | movea.l #0xe000+10*2+8*64*2,a1 |
80560599 |
1189 | move.w #11-1,d1 |
27d5cc88 |
1190 | 0: |
1191 | move.w a1,a0 |
1192 | jsr load_prepare |
1193 | move.w #20-1,d0 |
1194 | 1: |
1195 | move.w #0,(a0) |
1196 | dbra d0,1b |
1197 | |
1198 | add.w #64*2,a1 |
1199 | dbra d1,0b |
1200 | rts |
1201 | |
1202 | ################### goto predef ################## |
1203 | |
1204 | mode_goto_predef: |
1205 | /* frame */ |
1206 | movea.l #0xe000+14*2+8*64*2,a1 |
1207 | move.l #predef_addr_cnt+2-1,d1 |
1208 | 0: |
1209 | move.w a1,a0 |
1210 | jsr load_prepare |
1211 | moveq.l #10-1,d0 |
1212 | 1: |
1213 | move.w #0,(a0) |
1214 | dbra d0,1b |
1215 | |
1216 | add.w #64*2,a1 |
1217 | dbra d1,0b |
1218 | |
1219 | /* draw addresses */ |
1220 | movea.l #0xe000+17*2+9*64*2,a1 |
318e20ff |
1221 | lea (predef_addrs,pc),a2 |
27d5cc88 |
1222 | move.w #predef_addr_cnt-1,d4 |
1223 | move.l #0x8006,d3 |
1224 | mgp_da_loop: |
1225 | move.w a1,a0 |
1226 | jsr load_prepare |
1227 | move.l (a2)+,d2 |
1228 | jsr print_hex_preped |
1229 | add.w #64*2,a1 |
1230 | dbra d4,mgp_da_loop |
1231 | |
1232 | /* cursor */ |
1233 | movea.l #0xe000+15*2+9*64*2,a0 |
1234 | moveq.l #0,d0 |
1235 | move.b d5,d0 |
1236 | lsl.w #7,d0 |
1237 | add.w d0,a0 |
1238 | jsr load_prepare |
1239 | move.w #'>',(a0) |
1240 | |
1241 | /* input */ |
1242 | jsr get_input /* x0cbrldu x1sa00du */ |
1243 | |
1244 | move.w d0,d1 |
1245 | and.w #3,d1 |
1246 | beq mgp_no_ud |
1247 | btst.l #0,d0 |
1248 | sne d2 |
1249 | or.b #1,d2 /* up -1, down 1 */ |
1250 | add.b d2,d5 |
1251 | cmp.b #0,d5 |
1252 | bge 0f |
1253 | move.b #predef_addr_cnt-1,d5 |
1254 | 0: |
1255 | cmp.b #predef_addr_cnt-1,d5 |
1256 | ble 0f |
1257 | move.b #0,d5 |
1258 | 0: |
318e20ff |
1259 | bra vbl_end |
27d5cc88 |
1260 | |
1261 | mgp_no_ud: |
1262 | btst.l #4,d0 /* A - confirm */ |
1263 | beq mgp_no_a |
1264 | moveq.l #0,d0 |
1265 | move.b d5,d0 |
1266 | lsl.w #2,d0 |
318e20ff |
1267 | lea (predef_addrs,pc),a0 |
27d5cc88 |
1268 | move.l (a0,d0),d5 |
1269 | lsl.l #8,d5 |
318e20ff |
1270 | bra mode_goto_finish |
27d5cc88 |
1271 | |
1272 | mgp_no_a: |
1273 | move.w d0,d1 |
1274 | and.w #0x3000,d1 |
1275 | beq mgp_no_bc |
1276 | bra return_to_main |
1277 | |
1278 | mgp_no_bc: |
318e20ff |
1279 | bra vbl_end |
27d5cc88 |
1280 | |
d90ff128 |
1281 | ##################### jmp ######################## |
1282 | |
1283 | mode_jmp_addr: |
1284 | btst.l #7,d6 |
1285 | bne mode_jmp_finish |
1286 | |
1287 | moveq.l #0,d5 |
1288 | or.b #3,d5 /* 3 bytes */ |
1289 | bclr.l #7,d6 |
1290 | change_mode MMODE_VAL_INPUT, MMODE_JMP_ADDR |
318e20ff |
1291 | bra vbl_end |
d90ff128 |
1292 | |
1293 | mode_jmp_finish: |
1294 | lsr.l #8,d5 |
1295 | write_vdp_r_dst 1,(VDP1_E_DISPLAY | VDP1_MODE5),(GFXCNTL) /* disable vint */ |
1296 | move.l d5,a0 |
1297 | jmp (a0) |
1298 | |
80560599 |
1299 | mode_transfer: |
8689c962 |
1300 | move.b #0x40,(0xa1000b).l /* port 2 ctrl */ |
1301 | move.b #0x00,(0xa10005).l /* port 2 data - start with TH low */ |
80560599 |
1302 | |
8689c962 |
1303 | lea (txt_transfer_ready,pc),a0 |
80560599 |
1304 | move.l #13,d0 |
1305 | move.l #13,d1 |
1306 | move.l #0x8000,d2 |
1307 | jsr print |
1308 | |
1309 | wait_tl_low0: |
1310 | move.b (0xa10005),d0 |
1311 | btst.b #4,d0 |
1312 | bne wait_tl_low0 |
1313 | |
1314 | menu_text txt_working, 13, 13, 0 |
8689c962 |
1315 | bra do_transfer |
27d5cc88 |
1316 | |
4dfddc2f |
1317 | # go back to main mode |
1318 | return_to_main: |
5f6473d9 |
1319 | bclr.l #7,d6 /* not edited */ |
4dfddc2f |
1320 | change_mode MMODE_MAIN, MMODE_MAIN |
27d5cc88 |
1321 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320),(GFXCNTL) |
318e20ff |
1322 | bra vbl_end |
fbad1b76 |
1323 | |
1324 | |
4db6e09f |
1325 | ################################################# |
1326 | # # |
1327 | # Initialize VDP registers # |
1328 | # # |
1329 | ################################################# |
1330 | |
1331 | init_gfx: |
1332 | move.l #GFXCNTL,a3 |
570c4371 |
1333 | write_vdp_reg 0,(VDP0_E_DISPLAY | VDP0_PLTT_FULL) |
318e20ff |
1334 | write_vdp_reg 1,(VDP1_E_DISPLAY | VDP1_MODE5) |
4db6e09f |
1335 | write_vdp_reg 2,(0xe000 >> 10) /* Screen map a adress */ |
1336 | write_vdp_reg 3,(0xe000 >> 10) /* Window address */ |
1337 | write_vdp_reg 4,(0xc000 >> 13) /* Screen map b address */ |
1338 | write_vdp_reg 5,(0xfc00 >> 9) /* Sprite address */ |
1339 | write_vdp_reg 6,0 |
570c4371 |
1340 | write_vdp_reg 7,0 /* Backdrop color */ |
80560599 |
1341 | write_vdp_reg 0x0a,1 /* Lines per hblank interrupt */ |
1342 | write_vdp_reg 0x0b,0 /* 2-cell vertical scrolling */ |
1343 | write_vdp_reg 0x0c,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320) |
1344 | write_vdp_reg 0x0d,(0x8000 >> 10) /* Horizontal scroll address */ |
1345 | write_vdp_reg 0x0e,0 |
1346 | write_vdp_reg 0x0f,2 |
1347 | write_vdp_reg 0x10,(VDP16_MAP_V32 | VDP16_MAP_H64) /* layer size */ |
1348 | write_vdp_reg 0x11,0 |
1349 | write_vdp_reg 0x12,0 |
4db6e09f |
1350 | rts |
1351 | |
1352 | |
d4279640 |
1353 | # get mask of bits representing safe words |
27d5cc88 |
1354 | # a1 - address to check |
1355 | # destroys d0-d2, strips upper bits from a1 |
d4279640 |
1356 | get_safety_mask: |
27d5cc88 |
1357 | move.l a1,d1 |
1358 | lsl.l #8,d1 |
1359 | lsr.l #8,d1 |
318e20ff |
1360 | lea (safe_addrs,pc),a1 |
27d5cc88 |
1361 | move.w #(safe_addrs_end - safe_addrs)/8-1,d2 |
1362 | 0: |
1363 | move.l (a1)+,d0 |
1364 | cmp.l d0,d1 |
1365 | blt 1f |
1366 | move.l (a1),d0 |
1367 | cmp.l d0,d1 |
1368 | ble addr_safe |
1369 | 1: |
1370 | addq.l #4,a1 |
1371 | dbra d2,0b |
1372 | |
27d5cc88 |
1373 | move.l d1,a1 |
d4279640 |
1374 | |
1375 | moveq.l #0x0c,d0 |
1376 | cmp.l #0xa14000,d1 |
1377 | beq gsm_rts |
1378 | |
1379 | moveq.l #0x08,d0 |
1380 | cmp.l #0xa14100,d1 |
1381 | beq gsm_rts |
1382 | |
1383 | /* check for VDP address */ |
1384 | move.l d1,d0 |
1385 | swap d0 |
1386 | and.b #0xe0,d0 |
1387 | cmp.b #0xc0,d0 |
1388 | bne addr_unsafe /* not vdp */ |
1389 | |
1390 | move.l d1,d0 |
1391 | and.l #0x0700e0,d0 |
1392 | bne addr_unsafe |
1393 | |
1394 | move.l d1,d0 |
1395 | and.b #0x1f,d0 |
1396 | cmp.b #0x04,d0 |
1397 | blt addr_hsafe_3 /* data port */ |
1398 | cmp.b #0x10,d0 |
1399 | blt addr_safe /* below PSG */ |
1400 | cmp.b #0x18,d0 |
1401 | bge addr_safe /* above PSG */ |
1402 | |
1403 | addr_unsafe: |
1404 | moveq.l #0,d0 /* skip line */ |
1405 | rts |
1406 | |
1407 | addr_hsafe_3: |
1408 | moveq.l #3,d0 /* skip 2 words */ |
27d5cc88 |
1409 | rts |
1410 | |
1411 | addr_safe: |
1412 | move.l d1,a1 |
d4279640 |
1413 | moveq.l #0xf,d0 |
1414 | gsm_rts: |
27d5cc88 |
1415 | rts |
1416 | |
1417 | |
1286a1ba |
1418 | # read single phase from controller |
fbad1b76 |
1419 | # #a0 - addr |
1286a1ba |
1420 | # d0 - result |
fbad1b76 |
1421 | # destroys d1,d2 |
1286a1ba |
1422 | get_input: |
1423 | move.b #0x40,(0xa10003) |
1424 | nop |
1425 | nop |
1426 | nop |
1427 | move.b (0xa10003),d0 |
1428 | move.b #0x00,(0xa10003) |
1429 | lsl.w #8,d0 |
1430 | nop |
1431 | move.b (0xa10003),d0 |
1432 | eor.w #0xffff,d0 |
fbad1b76 |
1433 | |
1434 | swap d7 |
1435 | move.w d7,d1 |
1436 | eor.w d0,d1 /* changed btns */ |
1437 | move.w d0,d7 /* old val */ |
1438 | swap d7 |
1439 | and.w d0,d1 /* what changed now */ |
1440 | bne 0f |
1441 | |
1442 | addq.b #1,d6 |
1443 | move.b d6,d2 |
27d5cc88 |
1444 | and.b #0x0f,d2 /* do autorepeat */ |
1445 | cmp.b #9,d2 |
fbad1b76 |
1446 | bne 1f |
1447 | move.w d0,d1 |
1448 | 0: |
27d5cc88 |
1449 | and.b #0xf0,d6 |
fbad1b76 |
1450 | 1: |
1451 | swap d0 |
1452 | move.w d1,d0 |
1286a1ba |
1453 | rts |
1454 | |
4dfddc2f |
1455 | # Prepare to write to VDP RAM @a0 |
0fc4f06b |
1456 | # sets a0 to VDP data port for convenience |
1457 | # a0: VRAM base |
1458 | # destroys d0 |
570c4371 |
1459 | |
4db6e09f |
1460 | load_prepare: |
0fc4f06b |
1461 | VRAM_ADDR_var a0 |
1462 | move.l d0,(GFXCNTL).l |
1463 | move.l #GFXDATA,a0 |
4db6e09f |
1464 | rts |
1465 | |
1466 | |
0fc4f06b |
1467 | # Load color data from ROM |
1468 | # a0: CRAM base |
1469 | # a1: color list address |
1470 | # d0: number of colors to load |
1471 | # destroys d1 |
4db6e09f |
1472 | |
1473 | load_colors: |
0fc4f06b |
1474 | move.l d0,d1 |
1475 | CRAM_ADDR_var a0 |
1476 | move.l d0,(GFXCNTL).l |
4db6e09f |
1477 | |
0fc4f06b |
1478 | move.l #GFXDATA,a0 |
1479 | subq.w #1,d1 |
1480 | 0: |
1481 | move.w (a1)+,(a0) |
1482 | dbra d1,0b |
4db6e09f |
1483 | |
1484 | rts |
1485 | |
0fc4f06b |
1486 | |
1487 | # print |
1488 | # a0 - string |
1489 | # d0 - x |
1490 | # d1 - y |
4dfddc2f |
1491 | # d2 - tile_bits[15:11] |
0fc4f06b |
1492 | # destroys a1 |
570c4371 |
1493 | |
1494 | print: |
0fc4f06b |
1495 | move.l a0,a1 |
1286a1ba |
1496 | XY2NT |
0fc4f06b |
1497 | jsr load_prepare |
4dfddc2f |
1498 | move.l d2,d0 |
1499 | and.w #0xf800,d0 |
570c4371 |
1500 | |
1501 | _print_loop: |
0fc4f06b |
1502 | move.b (a1)+,d0 |
570c4371 |
1503 | beq _print_end |
1504 | |
0fc4f06b |
1505 | move.w d0,(a0) |
318e20ff |
1506 | bra _print_loop |
570c4371 |
1507 | |
1508 | _print_end: |
1509 | rts |
1510 | |
4db6e09f |
1511 | |
1286a1ba |
1512 | # print_hex |
1513 | # d0 - x |
1514 | # d1 - y |
1515 | # d2 - value |
27d5cc88 |
1516 | # d3 - tile_bits[15:11]|digit_cnt[7:0] |
4276cd7a |
1517 | # destroys a0, preserves d3 |
1286a1ba |
1518 | |
1519 | print_hex: |
1520 | XY2NT |
1521 | jsr load_prepare |
1522 | |
1523 | print_hex_preped: |
4276cd7a |
1524 | moveq.l #0,d0 |
1525 | move.b d3,d0 |
1526 | move.l d0,d1 |
1286a1ba |
1527 | lsl.b #2,d0 |
1528 | ror.l d0,d2 /* prep value */ |
4276cd7a |
1529 | subq.l #1,d1 /* count */ |
1530 | move.w d3,d0 |
1531 | and.w #0xf800,d0 /* keep upper bits in d0 */ |
1286a1ba |
1532 | |
1533 | _print_hex_loop: |
1534 | rol.l #4,d2 |
1535 | move.b d2,d0 |
1536 | and.b #0xf,d0 |
1286a1ba |
1537 | |
1538 | add.b #'0',d0 |
4276cd7a |
1539 | cmp.b #'9',d0 |
1540 | ble 0f |
1541 | addq.b #7,d0 |
1542 | 0: |
1286a1ba |
1543 | move.w d0,(a0) |
4276cd7a |
1544 | dbra d1,_print_hex_loop |
1286a1ba |
1545 | |
1546 | rts |
1547 | |
1548 | |
318e20ff |
1549 | # wait vertical sync interrupt |
4db6e09f |
1550 | |
1551 | wait_vsync: |
fbad1b76 |
1552 | move.b d7,d0 |
4db6e09f |
1553 | _wait_change: |
1554 | stop #0x2000 |
fbad1b76 |
1555 | cmp.b d7,d0 |
4db6e09f |
1556 | beq _wait_change |
1557 | rts |
1558 | |
1559 | |
318e20ff |
1560 | # wait vsync start (polling) |
1561 | # destroys a0,d0 |
1562 | |
1563 | wait_vsync_poll: |
1564 | move.l #GFXCNTL,a0 |
1565 | 0: |
1566 | move.w (a0),d0 |
1567 | and.b #8,d0 |
1568 | nop |
1569 | nop |
1570 | bne 0b |
1571 | 0: |
1572 | move.w (a0),d0 |
1573 | and.b #8,d0 |
1574 | nop |
1575 | nop |
1576 | beq 0b |
1577 | rts |
1578 | |
1579 | |
ff17c043 |
1580 | test_code: |
ff17c043 |
1581 | nop |
ff17c043 |
1582 | |
1583 | test_code_ret_op: |
1584 | jmp 0x123456 /* will be patched */ |
1585 | test_code_end: |
1586 | |
4db6e09f |
1587 | ################################################# |
1588 | # # |
1589 | # RAM DATA # |
1590 | # # |
1591 | ################################################# |
1592 | |
1593 | .bss |
570c4371 |
1594 | |
fbad1b76 |
1595 | # nothing :) |
4db6e09f |
1596 | |
1597 | .end |
1598 | |
1599 | # vim:filetype=asmM68k |