74d5977b |
1 | ############################################################################### |
2 | # |
3 | # Copyright (c) 2009, GraÅžvydas Ignotas |
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 | # |
17 | # THIS SOFTWARE IS PROVIDED ''AS IS'' AND ANY |
18 | # EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
19 | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
20 | # DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY |
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 | # |
4db6e09f |
31 | |
ff17c043 |
32 | .equ USE_VINT, 0 |
33 | .equ COPY_TO_EXP, 1 |
34 | .equ RELOCATE_TO_RAM, 1 |
318e20ff |
35 | |
4db6e09f |
36 | .text |
37 | .globl main |
d4279640 |
38 | .globl INT |
1286a1ba |
39 | .globl VBL |
8689c962 |
40 | .globl return_to_main |
4db6e09f |
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 |
d90ff128 |
61 | .equ VDP1_MODE5, 0x04 |
4db6e09f |
62 | |
fbad1b76 |
63 | .equ VDP12_STE, 0x08 |
4db6e09f |
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 |
d90ff128 |
84 | .equ MMODE_JMP_ADDR, 6 |
8689c962 |
85 | .equ MMODE_PC, 7 |
4db6e09f |
86 | |
27d5cc88 |
87 | .equ predef_addr_cnt, ((predef_addrs_end-predef_addrs)/4) |
4db6e09f |
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 |
4db6e09f |
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 |
4db6e09f |
105 | |
d90ff128 |
106 | # Set up address in VDP, control port in dst |
107 | .macro VRAM_ADDR adr dst |
80560599 |
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 |
0fc4f06b |
113 | .endm |
114 | |
115 | |
116 | # make VDP word from address adr and store in d0 |
117 | .macro XRAM_ADDR_var adr |
570c4371 |
118 | move.l \adr,d0 |
0fc4f06b |
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 |
4db6e09f |
124 | .endm |
125 | |
126 | |
0fc4f06b |
127 | .macro VRAM_ADDR_var adr |
128 | XRAM_ADDR_var \adr |
129 | or.l #0x40000000,d0 |
4db6e09f |
130 | .endm |
131 | |
132 | |
0fc4f06b |
133 | .macro CRAM_ADDR_var adr |
134 | XRAM_ADDR_var \adr |
135 | or.l #0xc0000000,d0 |
4db6e09f |
136 | .endm |
137 | |
138 | |
1286a1ba |
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 | |
4276cd7a |
148 | # check if some d-pad button (and modifier) is pressed |
fbad1b76 |
149 | .macro do_dpad bit op val |
150 | btst.l #\bit,d0 |
151 | beq 0f |
152 | \op.l \val,a6 |
153 | bra dpad_end |
4276cd7a |
154 | 0: |
4276cd7a |
155 | .endm |
156 | |
4dfddc2f |
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 | |
80560599 |
172 | # destroys a0,d0-d2 |
27d5cc88 |
173 | .macro menu_text str x y pal |
318e20ff |
174 | lea (\str,pc),a0 |
27d5cc88 |
175 | move.l #\x,d0 |
176 | move.l #\y,d1 |
177 | move.l #0x8000|(\pal<<13),d2 |
178 | jsr print |
179 | .endm |
180 | |
4db6e09f |
181 | ################################################# |
182 | # # |
183 | # DATA # |
184 | # # |
185 | ################################################# |
186 | |
187 | colors: |
4276cd7a |
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 |
d4279640 |
194 | dc.w 0x0000,0x044e,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
195 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
570c4371 |
196 | colors_end: |
197 | |
4db6e09f |
198 | |
199 | sprite_data: |
200 | /* Y size link attr X */ |
570c4371 |
201 | dc.w 0; dc.b 0x05; dc.b 0; dc.w 0x6002; dc.w 0 |
4db6e09f |
202 | sprite_data_end: |
203 | |
27d5cc88 |
204 | predef_addrs: |
205 | dc.l 0x000000, 0x200000, 0x400000, 0xa00000, 0xa10000 |
d4279640 |
206 | dc.l 0xa11100, 0xa12000, 0xa13000, 0xa14000, 0xc00000 |
27d5cc88 |
207 | predef_addrs_end: |
208 | |
209 | safe_addrs: |
210 | dc.l 0x000000, 0x7fffff |
211 | dc.l 0xe00000, 0xffffff |
d4279640 |
212 | dc.l 0xa00000, 0xa100ff |
213 | dc.l 0xa11000, 0xa113ff |
214 | dc.l 0xa12000, 0xa120ff |
215 | dc.l 0xa13000, 0xa130ff |
27d5cc88 |
216 | safe_addrs_end: |
217 | |
4dfddc2f |
218 | txt_edit: |
219 | .ascii "- edit -\0" |
220 | txt_a_confirm: |
221 | .ascii "A-confirm\0" |
27d5cc88 |
222 | txt_about: |
318e20ff |
223 | .ascii "hexed r2\0" |
27d5cc88 |
224 | txt_goto: |
225 | .ascii "Go to address\0" |
226 | txt_goto_predef: |
227 | .ascii "Go to (predef)\0" |
d90ff128 |
228 | txt_jmp_addr: |
229 | .ascii "Jump to address\0" |
80560599 |
230 | txt_dump: |
8689c962 |
231 | .ascii "PC Transfer\0" |
27d5cc88 |
232 | txt_dtack: |
233 | .ascii "DTACK safety\0" |
8689c962 |
234 | txt_transfer_ready: |
235 | .ascii "Transfer Ready\0" |
80560599 |
236 | txt_working: |
8689c962 |
237 | .ascii "PC mode \0" |
d4279640 |
238 | txt_dtack_err: |
239 | .ascii "DTACK err?\0" |
240 | txt_exc: |
241 | .ascii "Exception \0" |
4dfddc2f |
242 | |
4db6e09f |
243 | ################################################## |
244 | # # |
245 | # MAIN PROGRAM # |
246 | # # |
247 | ################################################## |
27d5cc88 |
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 | |
570c4371 |
257 | .align 2 |
258 | |
4db6e09f |
259 | main: |
8689c962 |
260 | /* make sure io port 2 is doing inputs */ |
261 | move.b #0,(0xa1000b).l |
4276cd7a |
262 | /* mask irqs during init */ |
1286a1ba |
263 | move.w #0x2700,sr |
264 | |
ff17c043 |
265 | .if COPY_TO_EXP |
80560599 |
266 | /* copy to expansion device if magic number is set */ |
267 | move.l #0x400000,a1 |
268 | cmp.w #0x1234,(a1) |
27d5cc88 |
269 | bne 0f |
270 | |
80560599 |
271 | move.l #0,a0 |
318e20ff |
272 | move.w #0x2000/8-1,d0 |
80560599 |
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 | |
80560599 |
287 | /* copy, assume 8K size */ |
318e20ff |
288 | move.l #0xFF0100,a1 |
80560599 |
289 | move.w #0x2000/8-1,d0 |
27d5cc88 |
290 | 1: |
318e20ff |
291 | move.l (a0)+,(a1)+ |
292 | move.l (a0)+,(a1)+ |
27d5cc88 |
293 | dbra d0,1b |
80560599 |
294 | |
ff17c043 |
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 |
ff17c043 |
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) |
27d5cc88 |
315 | 0: |
316 | .endif |
317 | |
1286a1ba |
318 | movea.l #0,a6 |
4dfddc2f |
319 | move.l #0x8000,d7 |
fbad1b76 |
320 | moveq.l #0,d6 |
1286a1ba |
321 | |
322 | /* Init pads */ |
323 | move.b #0x40,(0xa10009).l |
324 | move.b #0x40,(0xa10003).l |
325 | |
4db6e09f |
326 | /* Initialize VDP */ |
327 | jsr init_gfx |
328 | |
80560599 |
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 | |
4db6e09f |
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 | |
74d5977b |
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: |
318e20ff |
446 | bra mode_main |
447 | bra mode_val_input |
448 | bra mode_edit_val /* edit val in editor */ |
449 | bra mode_goto |
450 | bra mode_start_menu |
451 | bra mode_goto_predef |
452 | bra mode_jmp_addr |
80560599 |
453 | bra mode_transfer |
fbad1b76 |
454 | |
455 | ##################### main ####################### |
456 | |
457 | mode_main: |
d4279640 |
458 | /* assume we will hang */ |
318e20ff |
459 | lea (txt_dtack_err,pc),a0 |
d4279640 |
460 | move.l #9,d0 |
461 | move.l #27,d1 |
462 | move.l #0xe000,d2 |
463 | jsr print |
464 | |
465 | moveq.l #0,d1 |
1286a1ba |
466 | move.l a6,d0 |
4276cd7a |
467 | move.b d0,d1 |
1286a1ba |
468 | lsr.l #8,d0 |
469 | move.l d0,a1 /* current addr */ |
4276cd7a |
470 | lsr.b #3,d1 |
471 | neg.b d1 |
472 | add.b #27-1,d1 /* line where the cursor sits */ |
473 | swap d1 |
1286a1ba |
474 | |
27d5cc88 |
475 | movea.l #0xe002,a2 |
4276cd7a |
476 | move.l #27-1,d5 /* line counter for dbra */ |
477 | or.l d1,d5 |
1286a1ba |
478 | |
27d5cc88 |
479 | draw_row: |
1286a1ba |
480 | move.l a2,a0 |
481 | jsr load_prepare |
482 | |
27d5cc88 |
483 | btst.l #15,d7 |
484 | beq 0f |
485 | move.w #' ',(a0) |
486 | 0: |
1286a1ba |
487 | /* addr */ |
488 | move.l a1,d2 |
489 | moveq.l #6,d3 |
490 | jsr print_hex_preped |
491 | |
27d5cc88 |
492 | btst.l #4,d6 |
493 | bne draw_row_safe |
494 | |
d4279640 |
495 | bsr get_safety_mask |
496 | cmp.b #0xf,d0 |
497 | beq draw_row_safe |
27d5cc88 |
498 | |
d4279640 |
499 | # unsafe or partially safe |
500 | draw_row_hsafe: |
501 | move.l d0,d4 |
502 | swap d4 /* mask in upper word */ |
27d5cc88 |
503 | btst.l #15,d7 |
d4279640 |
504 | bne draw_row_hsafe_words_pre |
27d5cc88 |
505 | |
d4279640 |
506 | draw_row_hsafe_bytes_pre: |
27d5cc88 |
507 | /* 8 bytes */ |
d4279640 |
508 | moveq.l #2,d3 |
509 | move.w #3,d4 |
510 | |
511 | draw_row_hsafe_bytes: |
27d5cc88 |
512 | move.w #' ',(a0) |
d4279640 |
513 | move.b d4,d0 |
514 | add.b #16,d0 |
515 | btst.l d0,d4 |
516 | bne 0f |
27d5cc88 |
517 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
518 | move.w #' ',(a0) |
519 | move.l #'?'|('?'<<16),(a0) |
520 | bra 1f |
521 | 0: |
522 | move.b (0,a1),d2 |
523 | jsr print_hex_preped |
524 | move.w #' ',(a0) |
525 | move.b (1,a1),d2 |
526 | jsr print_hex_preped |
527 | 1: |
528 | addq.l #2,a1 |
529 | dbra d4,draw_row_hsafe_bytes |
27d5cc88 |
530 | |
531 | move.w #' ',(a0) |
532 | |
533 | move.l d5,d0 |
534 | swap d0 |
535 | cmp.w d5,d0 |
536 | beq draw_cursor_unsafe_byte |
d4279640 |
537 | bra draw_chars_hsafe_pre |
27d5cc88 |
538 | |
d4279640 |
539 | draw_row_hsafe_words_pre: |
27d5cc88 |
540 | /* 4 shorts */ |
d4279640 |
541 | moveq.l #4,d3 |
542 | move.w #3,d4 |
543 | |
544 | draw_row_hsafe_words: |
27d5cc88 |
545 | move.w #' ',(a0) |
d4279640 |
546 | move.b d4,d0 |
547 | add.b #16,d0 |
548 | btst.l d0,d4 |
549 | bne 0f |
27d5cc88 |
550 | move.l #'?'|('?'<<16),(a0) |
551 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
552 | bra 1f |
553 | 0: |
554 | move.w (a1),d2 |
555 | jsr print_hex_preped |
556 | 1: |
557 | addq.l #2,a1 |
558 | dbra d4,draw_row_hsafe_words |
27d5cc88 |
559 | |
560 | move.l #(' '<<16)|' ',(a0) |
561 | |
562 | move.l d5,d0 |
563 | swap d0 |
564 | cmp.w d5,d0 |
565 | beq draw_cursor_unsafe_word |
566 | |
d4279640 |
567 | draw_chars_hsafe_pre: |
568 | subq.l #8,a1 |
569 | move.w #3,d4 |
570 | moveq.l #0,d0 |
571 | |
572 | draw_chars_hsafe: |
573 | move.b d4,d0 |
574 | add.b #16,d0 |
575 | btst.l d0,d4 |
576 | bne 0f |
27d5cc88 |
577 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
578 | bra draw_chars_hsafe_next |
579 | 0: |
580 | btst.l #15,d7 /* must perform correct read type */ |
581 | bne 0f /* doing byte reads on security reg hangs */ |
582 | move.b (0,a1),d0 |
583 | lsl.l #8,d0 |
584 | move.b (1,a1),d0 |
585 | bra 1f |
586 | 0: |
587 | move.w (a1),d0 |
588 | 1: |
589 | ror.l #8,d0 |
590 | move.b d0,d1 |
591 | sub.b #0x20,d1 |
592 | cmp.b #0x60,d1 |
593 | blo 0f |
594 | move.b #'.',d0 |
595 | 0: |
596 | move.w d0,(a0) |
597 | |
598 | move.b #0,d0 |
599 | rol.l #8,d0 |
600 | move.b d0,d1 |
601 | sub.b #0x20,d1 |
602 | cmp.b #0x60,d1 |
603 | blo 0f |
604 | move.b #'.',d0 |
605 | 0: |
606 | move.w d0,(a0) |
607 | |
608 | draw_chars_hsafe_next: |
609 | addq.l #2,a1 |
610 | dbra d4,draw_chars_hsafe |
27d5cc88 |
611 | |
612 | move.l #(' '<<16)|' ',(a0) |
27d5cc88 |
613 | add.w #0x80,a2 |
614 | dbra d5,draw_row |
615 | bra draw_status_bar |
616 | |
617 | |
618 | # normal draw |
619 | draw_row_safe: |
620 | btst.l #15,d7 |
621 | bne draw_row_words |
622 | |
623 | draw_row_bytes: |
624 | /* 8 bytes */ |
625 | moveq.l #2,d3 |
626 | moveq.l #8-1,d4 |
627 | draw_bytes: |
628 | move.w #' ',(a0) |
629 | move.b (a1)+,d2 |
630 | jsr print_hex_preped |
631 | dbra d4,draw_bytes |
632 | |
633 | move.w #' ',(a0) |
634 | |
635 | move.l d5,d0 |
636 | swap d0 |
637 | cmp.w d5,d0 |
638 | beq draw_cursor_byte |
639 | bra draw_chars_pre |
640 | |
641 | draw_row_words: |
1286a1ba |
642 | /* 4 shorts */ |
4276cd7a |
643 | moveq.l #4,d3 |
1286a1ba |
644 | moveq.l #4-1,d4 |
27d5cc88 |
645 | draw_words: |
1286a1ba |
646 | move.w #' ',(a0) |
647 | move.w (a1)+,d2 |
1286a1ba |
648 | jsr print_hex_preped |
27d5cc88 |
649 | dbra d4,draw_words |
650 | |
651 | move.l #(' '<<16)|' ',(a0) |
1286a1ba |
652 | |
4276cd7a |
653 | move.l d5,d0 |
654 | swap d0 |
655 | cmp.w d5,d0 |
27d5cc88 |
656 | beq draw_cursor_word |
4276cd7a |
657 | |
658 | draw_chars_pre: |
1286a1ba |
659 | /* 8 chars */ |
660 | subq.l #8,a1 |
661 | moveq.l #8-1,d4 |
662 | draw_chars: |
663 | move.b (a1)+,d0 |
664 | move.b d0,d1 |
665 | sub.b #0x20,d1 |
666 | cmp.b #0x60,d1 |
667 | blo 0f |
668 | move.w #'.',d0 |
669 | 0: |
670 | move.w d0,(a0) |
671 | dbra d4,draw_chars |
672 | |
27d5cc88 |
673 | move.l #(' '<<16)|' ',(a0) |
674 | |
1286a1ba |
675 | add.w #0x80,a2 |
27d5cc88 |
676 | dbra d5,draw_row |
1286a1ba |
677 | |
d4279640 |
678 | |
27d5cc88 |
679 | draw_status_bar: |
4276cd7a |
680 | /* status bar */ |
27d5cc88 |
681 | move.l a2,a0 |
4276cd7a |
682 | jsr load_prepare |
27d5cc88 |
683 | |
684 | btst.l #15,d7 |
685 | beq 0f |
686 | move.w #' ',(a0) |
687 | 0: |
4dfddc2f |
688 | mk_a6_addr d2 |
4276cd7a |
689 | move.l #0x4006,d3 |
690 | jsr print_hex_preped |
d4279640 |
691 | |
692 | /* clear error */ |
693 | moveq.l #5-1,d0 |
694 | 0: |
695 | move.l #' '|(' '<<16),(a0) |
696 | move.l #' '|(' '<<16),(a0) |
697 | dbra d0,0b |
698 | |
4276cd7a |
699 | |
1286a1ba |
700 | /* handle input */ |
701 | jsr get_input /* x0cbrldu x1sa00du */ |
1286a1ba |
702 | |
fbad1b76 |
703 | btst.l #16+4,d0 /* A - scroll modifier */ |
704 | beq input_noa |
705 | |
706 | do_dpad 16+0, sub, #0x0800 |
707 | do_dpad 16+1, add, #0x0800 |
708 | do_dpad 16+10, sub, #0xd800 |
709 | do_dpad 16+11, add, #0xd800 |
710 | input_noa: |
711 | moveq.l #0,d1 |
4dfddc2f |
712 | move.w d7,d1 |
713 | lsr.w #7,d1 |
714 | lsr.w #7,d1 |
fbad1b76 |
715 | |
716 | do_dpad 0, subq, #0x0008 |
717 | do_dpad 1, addq, #0x0008 |
718 | do_dpad 10, sub, d1 |
719 | do_dpad 11, add, d1 |
720 | |
721 | dpad_end: |
4dfddc2f |
722 | /* update addr */ |
723 | move.l a6,d1 |
724 | cmp.b #0xf0,d1 |
725 | blo 0f |
726 | sub.l #0xd800,a6 |
727 | add.w #0x00d8,a6 |
728 | bra 1f |
729 | 0: |
730 | cmp.b #0xd8,d1 |
731 | blo 1f |
732 | add.l #0xd800,a6 |
733 | sub.w #0x00d8,a6 |
734 | 1: |
735 | |
736 | /* other btns */ |
fbad1b76 |
737 | moveq.l #0,d1 |
738 | btst.l #12,d0 /* B - switch byte/word mode */ |
739 | beq input_nob |
4dfddc2f |
740 | bclr.l #15,d7 |
741 | add.w #0x4000,d7 /* changes between 01 10 */ |
fbad1b76 |
742 | move.l a6,d1 |
743 | and.l #1,d1 |
744 | sub.l d1,a6 /* make even, just in case */ |
745 | |
746 | input_nob: |
747 | btst.l #13,d0 /* C - edit selected byte */ |
748 | beq input_noc |
4dfddc2f |
749 | |
750 | change_mode MMODE_EDIT_VAL, MMODE_MAIN |
27d5cc88 |
751 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
fbad1b76 |
752 | |
753 | input_noc: |
27d5cc88 |
754 | btst.l #5,d0 /* Start - menu */ |
4dfddc2f |
755 | beq input_nos |
756 | |
27d5cc88 |
757 | moveq.l #0,d5 |
758 | change_mode MMODE_START_MENU, MMODE_MAIN |
759 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
1286a1ba |
760 | |
4dfddc2f |
761 | input_nos: |
fbad1b76 |
762 | vbl_end: |
d90ff128 |
763 | # movem.l (a7)+,d0-d4/a0-a5 |
318e20ff |
764 | .if USE_VINT |
1286a1ba |
765 | rte |
318e20ff |
766 | .else |
767 | rts |
768 | .endif |
1286a1ba |
769 | |
770 | |
27d5cc88 |
771 | draw_cursor_unsafe_byte: |
772 | move.l a6,d0 |
773 | and.l #7,d0 /* byte offs */ |
774 | move.b d0,d1 |
775 | add.b d0,d0 |
776 | add.b d1,d0 /* d0 *= 3 (chars) */ |
777 | add.b d0,d0 |
778 | lea (7*2,a2,d0),a0 |
779 | jsr load_prepare |
780 | move.l #(0x2000|'?'|((0x2000|'?')<<16)),(a0) |
781 | |
782 | move.l a2,a0 |
783 | add.w #31*2,a0 |
784 | jsr load_prepare /* restore a0 */ |
318e20ff |
785 | bra draw_chars_hsafe_pre |
27d5cc88 |
786 | |
787 | draw_cursor_unsafe_word: |
4276cd7a |
788 | move.l a6,d0 |
789 | and.l #7,d0 /* byte offs */ |
790 | move.l d0,d1 |
791 | lsr.b #1,d1 /* which word */ |
792 | move.b d1,d2 |
793 | lsl.b #2,d2 |
794 | add.b d2,d1 /* num of chars to skip */ |
27d5cc88 |
795 | add.b d1,d1 |
796 | |
797 | lea (8*2,a2,d1),a0 |
798 | jsr load_prepare |
799 | move.l #(0x2000|'?'|((0x2000|'?')<<16)),d0 |
800 | move.l d0,(a0) |
801 | move.l d0,(a0) |
802 | |
803 | move.l a2,a0 |
804 | add.w #29*2,a0 |
805 | jsr load_prepare /* restore a0 */ |
318e20ff |
806 | bra draw_chars_hsafe_pre |
4276cd7a |
807 | |
4276cd7a |
808 | |
fbad1b76 |
809 | draw_cursor_byte: |
27d5cc88 |
810 | move.l a6,d0 |
811 | and.l #7,d0 /* byte offs */ |
812 | move.w #0x2002,d3 |
813 | |
fbad1b76 |
814 | move.b (-8,a1,d0),d2 |
27d5cc88 |
815 | move.b d0,d1 |
816 | add.b d0,d0 |
817 | add.b d1,d0 /* d0 *= 3 (chars) */ |
818 | add.b d0,d0 |
819 | lea (7*2,a2,d0),a0 |
820 | jsr load_prepare |
821 | jsr print_hex_preped |
822 | |
823 | move.l a2,a0 |
824 | add.w #31*2,a0 |
825 | jsr load_prepare /* restore a0 */ |
826 | |
318e20ff |
827 | bra draw_chars_pre |
fbad1b76 |
828 | |
829 | draw_cursor_word: |
27d5cc88 |
830 | move.l a6,d0 |
831 | and.l #7,d0 /* byte offs */ |
832 | move.l d0,d1 |
833 | lsr.b #1,d1 /* which word */ |
834 | move.b d1,d2 |
835 | lsl.b #2,d2 |
836 | add.b d2,d1 /* num of chars to skip */ |
837 | add.b d1,d1 |
838 | move.w #0x2004,d3 |
839 | |
fbad1b76 |
840 | move.w (-8,a1,d0),d2 |
27d5cc88 |
841 | lea (8*2,a2,d1),a0 |
4276cd7a |
842 | jsr load_prepare |
4276cd7a |
843 | jsr print_hex_preped |
844 | |
845 | move.l a2,a0 |
27d5cc88 |
846 | add.w #29*2,a0 |
4276cd7a |
847 | jsr load_prepare /* restore a0 */ |
848 | |
318e20ff |
849 | bra draw_chars_pre |
4276cd7a |
850 | |
851 | |
4dfddc2f |
852 | #################### hedit ####################### |
853 | |
854 | mode_edit_val: |
855 | btst.l #7,d6 |
856 | bne mode_hedit_finish |
857 | |
858 | /* read val to edit */ |
5f6473d9 |
859 | moveq.l #0,d5 |
4dfddc2f |
860 | mk_a6_addr d1 |
861 | move.l d1,a0 |
4dfddc2f |
862 | btst.l #15,d7 |
863 | bne 0f |
5f6473d9 |
864 | move.b (a0),d5 |
865 | lsl.l #8,d5 |
866 | or.b #1,d5 |
4dfddc2f |
867 | bra 1f |
868 | 0: |
5f6473d9 |
869 | move.w (a0),d5 |
870 | lsl.l #8,d5 |
871 | or.b #2,d5 |
4dfddc2f |
872 | 1: |
4dfddc2f |
873 | |
4dfddc2f |
874 | change_mode MMODE_VAL_INPUT, MMODE_EDIT_VAL |
318e20ff |
875 | bra vbl_end |
4dfddc2f |
876 | |
877 | mode_hedit_finish: |
878 | /* write the val */ |
879 | mk_a6_addr d1 |
880 | move.l d1,a0 |
5f6473d9 |
881 | lsr.l #8,d5 |
4dfddc2f |
882 | |
883 | btst.l #15,d7 |
884 | bne 0f |
5f6473d9 |
885 | move.b d5,(a0) |
4dfddc2f |
886 | bra 1f |
887 | 0: |
5f6473d9 |
888 | move.w d5,(a0) |
4dfddc2f |
889 | 1: |
890 | |
4dfddc2f |
891 | bra return_to_main |
892 | |
893 | ##################### goto ####################### |
894 | |
895 | mode_goto: |
896 | btst.l #7,d6 |
897 | bne mode_goto_finish |
fbad1b76 |
898 | |
5f6473d9 |
899 | moveq.l #0,d5 |
900 | swap d6 |
901 | move.w d6,d5 |
902 | swap d6 |
903 | swap d5 |
904 | or.b #3,d5 /* 3 bytes */ |
4dfddc2f |
905 | bclr.l #7,d6 |
906 | change_mode MMODE_VAL_INPUT, MMODE_GOTO |
318e20ff |
907 | bra vbl_end |
4dfddc2f |
908 | |
909 | mode_goto_finish: |
5f6473d9 |
910 | lsr.l #8,d5 |
911 | move.l d5,d0 |
4dfddc2f |
912 | move.l d0,d1 |
913 | and.l #7,d1 |
914 | and.b #0xf8,d0 |
915 | lsl.l #8,d0 |
916 | or.l d1,d0 |
917 | move.l d0,a6 |
918 | |
5f6473d9 |
919 | lsr.l #8,d5 |
920 | swap d6 |
921 | move.w d5,d6 |
922 | swap d6 |
923 | |
4dfddc2f |
924 | bra return_to_main |
925 | |
926 | ################### val edit ##################### |
927 | |
928 | mode_val_input: |
929 | /* frame */ |
930 | movea.l #0xe000+14*2+11*64*2,a1 |
931 | moveq.l #6-1,d1 |
932 | 0: |
933 | move.w a1,a0 |
934 | jsr load_prepare |
935 | moveq.l #11-1,d0 |
936 | 1: |
937 | move.w #0,(a0) |
938 | dbra d0,1b |
939 | |
940 | add.w #64*2,a1 |
941 | dbra d1,0b |
942 | |
943 | /* text */ |
318e20ff |
944 | lea (txt_edit,pc),a0 |
4dfddc2f |
945 | move.l #15,d0 |
946 | move.l #11,d1 |
947 | move.l #0xc000,d2 |
948 | jsr print |
949 | |
318e20ff |
950 | lea (txt_a_confirm,pc),a0 |
4dfddc2f |
951 | move.l #15,d0 |
952 | move.l #15,d1 |
953 | move.l #0xc000,d2 |
954 | jsr print |
955 | |
956 | /* edit field */ |
957 | moveq.l #0,d0 |
958 | moveq.l #0,d1 |
959 | moveq.l #0,d3 |
5f6473d9 |
960 | move.b d5,d3 |
961 | and.b #3,d3 /* edit field bytes */ |
4dfddc2f |
962 | |
963 | move.b #19,d0 |
964 | sub.b d3,d0 |
965 | move.b #13,d1 |
5f6473d9 |
966 | move.l d5,d2 |
4dfddc2f |
967 | lsr.l #8,d2 |
968 | add.b d3,d3 |
969 | or.w #0x8000,d3 |
970 | jsr print_hex |
971 | |
972 | /* current char */ |
973 | moveq.l #0,d0 |
974 | moveq.l #0,d1 |
975 | |
976 | and.w #6,d3 |
977 | move.b #19,d0 |
978 | move.b d3,d1 |
979 | lsr.b #1,d1 /* length in bytes */ |
980 | sub.b d1,d0 |
5f6473d9 |
981 | move.b d5,d1 |
982 | lsr.b #2,d1 |
4dfddc2f |
983 | and.b #7,d1 /* nibble to edit */ |
984 | add.b d1,d0 |
985 | |
986 | sub.b d1,d3 |
987 | sub.b #1,d3 /* chars to shift out */ |
988 | lsl.b #2,d3 |
989 | add.b #8,d3 |
5f6473d9 |
990 | move.l d5,d2 |
4dfddc2f |
991 | lsr.l d3,d2 |
992 | |
993 | move.b #13,d1 |
994 | move.w #0xa001,d3 |
995 | jsr print_hex |
996 | |
997 | /* handle input */ |
998 | jsr get_input /* x0cbrldu x1sa00du */ |
999 | |
1000 | move.w d0,d1 |
1001 | and.w #0x0f00,d1 |
1002 | beq ai_no_dpad |
5f6473d9 |
1003 | move.b d5,d1 |
1004 | and.b #3,d1 |
4dfddc2f |
1005 | add.b d1,d1 /* nibble count */ |
1006 | sub.b #1,d1 /* max n.t.e. val */ |
5f6473d9 |
1007 | move.b d5,d2 |
1008 | lsr.b #2,d2 |
4dfddc2f |
1009 | and.b #7,d2 /* nibble to edit */ |
1010 | |
1011 | move.b d0,d3 |
1012 | and.b #3,d3 |
1013 | beq ai_no_ud |
1014 | moveq.l #0,d3 |
1015 | moveq.l #0,d4 |
1016 | move.b #0xf,d3 |
1017 | move.b #0x1,d4 |
1018 | sub.b d2,d1 |
1019 | lsl.b #2,d1 |
1020 | add.b #8,d1 |
1021 | lsl.l d1,d3 /* mask */ |
1022 | lsl.l d1,d4 /* what to add/sub */ |
5f6473d9 |
1023 | move.l d5,d1 |
4dfddc2f |
1024 | and.l d3,d1 |
1025 | btst.l #8,d0 |
1026 | beq 0f |
1027 | add.l d4,d1 |
1028 | bra 1f |
1029 | 0: |
1030 | sub.l d4,d1 |
1031 | 1: |
1032 | and.l d3,d1 |
1033 | eor.l #0xffffffff,d3 |
5f6473d9 |
1034 | and.l d3,d5 |
1035 | or.l d1,d5 |
318e20ff |
1036 | bra vbl_end |
4dfddc2f |
1037 | |
1038 | ai_no_ud: |
1039 | btst.l #10,d0 |
1040 | bne 0f |
1041 | add.b #1,d2 |
1042 | bra 1f |
1043 | 0: |
1044 | sub.b #1,d2 |
1045 | 1: |
1046 | cmp.b #0,d2 |
1047 | bge 0f |
1048 | move.b d1,d2 |
1049 | 0: |
1050 | cmp.b d1,d2 |
1051 | ble 0f |
1052 | move.b #0,d2 |
1053 | 0: |
5f6473d9 |
1054 | and.b #0xe3,d5 |
1055 | lsl.b #2,d2 |
1056 | or.b d2,d5 |
318e20ff |
1057 | bra vbl_end |
4dfddc2f |
1058 | |
1059 | ai_no_dpad: |
1060 | move.w d0,d1 |
1061 | and.w #0x1020,d1 |
1062 | beq ai_no_sb |
1063 | |
4dfddc2f |
1064 | bra return_to_main |
1065 | |
1066 | ai_no_sb: |
5f6473d9 |
1067 | btst.l #4,d0 /* A - confirm */ |
4dfddc2f |
1068 | beq ai_no_input |
1069 | bset.l #7,d6 |
5f6473d9 |
1070 | move.w d7,d1 /* back to prev mode */ |
4dfddc2f |
1071 | and.w #0x3800,d1 |
1072 | lsr.w #3,d1 |
1073 | and.w #0xc0ff,d7 |
1074 | or.w d1,d7 |
1075 | |
1076 | ai_no_input: |
318e20ff |
1077 | bra vbl_end |
4dfddc2f |
1078 | |
1079 | |
27d5cc88 |
1080 | ################### start menu ################### |
1081 | |
1082 | mode_start_menu: |
1083 | /* frame */ |
1084 | bsr start_menu_box |
1085 | |
1086 | /* text */ |
1087 | menu_text txt_about, 13, 9, 1 |
1088 | menu_text txt_goto, 13, 11, 0 |
1089 | menu_text txt_goto_predef, 13, 12, 0 |
d90ff128 |
1090 | menu_text txt_jmp_addr, 13, 13, 0 |
80560599 |
1091 | menu_text txt_dump, 13, 14, 0 |
1092 | menu_text txt_dtack, 13, 15, 0 |
1093 | menu_text txt_a_confirm, 13, 17, 2 |
27d5cc88 |
1094 | |
1095 | /* dtack safety on/off */ |
80560599 |
1096 | movea.l #0xe000+26*2+15*64*2,a0 |
27d5cc88 |
1097 | jsr load_prepare |
1098 | move.w #0x8000|'O',(a0) |
1099 | btst.l #4,d6 |
1100 | bne 0f |
1101 | move.w #0x8000|'N',(a0) |
1102 | bra 1f |
1103 | 0: |
1104 | move.w #0x8000|'F',(a0) |
1105 | move.w #0x8000|'F',(a0) |
1106 | 1: |
1107 | |
1108 | /* cursor */ |
1109 | movea.l #0xe000+11*2+11*64*2,a0 |
1110 | moveq.l #0,d0 |
1111 | move.b d5,d0 |
80560599 |
1112 | and.b #7,d0 |
27d5cc88 |
1113 | lsl.w #7,d0 |
1114 | add.w d0,a0 |
1115 | jsr load_prepare |
1116 | move.w #'>',(a0) |
1117 | |
1118 | /* input */ |
1119 | jsr get_input /* x0cbrldu x1sa00du */ |
1120 | |
1121 | move.w d0,d1 |
1122 | and.w #3,d1 |
1123 | beq msm_no_ud |
1124 | move.b d5,d1 |
80560599 |
1125 | and.b #7,d1 |
27d5cc88 |
1126 | btst.l #0,d0 |
1127 | sne d2 |
1128 | or.b #1,d2 /* up -1, down 1 */ |
1129 | add.b d2,d1 |
1130 | cmp.b #0,d1 |
1131 | bge 0f |
80560599 |
1132 | move.b #4,d1 |
27d5cc88 |
1133 | 0: |
80560599 |
1134 | cmp.b #4,d1 |
27d5cc88 |
1135 | ble 0f |
1136 | move.b #0,d1 |
1137 | 0: |
80560599 |
1138 | and.b #0xf8,d5 |
27d5cc88 |
1139 | or.b d1,d5 |
318e20ff |
1140 | bra vbl_end |
27d5cc88 |
1141 | |
1142 | msm_no_ud: |
1143 | btst.l #4,d0 /* A - confirm */ |
1144 | beq msm_no_a |
1145 | move.b d5,d1 |
80560599 |
1146 | and.b #7,d1 |
27d5cc88 |
1147 | bne 0f |
1148 | change_mode MMODE_GOTO, MMODE_MAIN |
1149 | bsr start_menu_box |
318e20ff |
1150 | bra vbl_end |
27d5cc88 |
1151 | 0: |
1152 | cmp.b #1,d1 |
1153 | bne 0f |
1154 | moveq.l #0,d5 |
1155 | change_mode MMODE_GOTO_PREDEF, MMODE_MAIN |
1156 | bsr start_menu_box |
318e20ff |
1157 | bra vbl_end |
27d5cc88 |
1158 | 0: |
1159 | cmp.b #2,d1 |
1160 | bne 0f |
d90ff128 |
1161 | change_mode MMODE_JMP_ADDR, MMODE_MAIN |
1162 | bsr start_menu_box |
318e20ff |
1163 | bra vbl_end |
d90ff128 |
1164 | 0: |
1165 | cmp.b #3,d1 |
1166 | bne 0f |
8689c962 |
1167 | change_mode MMODE_PC, MMODE_MAIN |
80560599 |
1168 | bsr start_menu_box |
1169 | bra vbl_end |
1170 | 0: |
1171 | cmp.b #4,d1 |
1172 | bne 0f |
27d5cc88 |
1173 | bchg.l #4,d6 |
318e20ff |
1174 | bra vbl_end |
27d5cc88 |
1175 | 0: |
1176 | |
1177 | msm_no_a: |
1178 | move.w d0,d1 |
1179 | and.w #0x3000,d1 |
1180 | beq msm_no_bc |
1181 | bra return_to_main |
1182 | |
1183 | msm_no_bc: |
318e20ff |
1184 | bra vbl_end |
27d5cc88 |
1185 | |
1186 | start_menu_box: |
1187 | movea.l #0xe000+10*2+8*64*2,a1 |
80560599 |
1188 | move.w #11-1,d1 |
27d5cc88 |
1189 | 0: |
1190 | move.w a1,a0 |
1191 | jsr load_prepare |
1192 | move.w #20-1,d0 |
1193 | 1: |
1194 | move.w #0,(a0) |
1195 | dbra d0,1b |
1196 | |
1197 | add.w #64*2,a1 |
1198 | dbra d1,0b |
1199 | rts |
1200 | |
1201 | ################### goto predef ################## |
1202 | |
1203 | mode_goto_predef: |
1204 | /* frame */ |
1205 | movea.l #0xe000+14*2+8*64*2,a1 |
1206 | move.l #predef_addr_cnt+2-1,d1 |
1207 | 0: |
1208 | move.w a1,a0 |
1209 | jsr load_prepare |
1210 | moveq.l #10-1,d0 |
1211 | 1: |
1212 | move.w #0,(a0) |
1213 | dbra d0,1b |
1214 | |
1215 | add.w #64*2,a1 |
1216 | dbra d1,0b |
1217 | |
1218 | /* draw addresses */ |
1219 | movea.l #0xe000+17*2+9*64*2,a1 |
318e20ff |
1220 | lea (predef_addrs,pc),a2 |
27d5cc88 |
1221 | move.w #predef_addr_cnt-1,d4 |
1222 | move.l #0x8006,d3 |
1223 | mgp_da_loop: |
1224 | move.w a1,a0 |
1225 | jsr load_prepare |
1226 | move.l (a2)+,d2 |
1227 | jsr print_hex_preped |
1228 | add.w #64*2,a1 |
1229 | dbra d4,mgp_da_loop |
1230 | |
1231 | /* cursor */ |
1232 | movea.l #0xe000+15*2+9*64*2,a0 |
1233 | moveq.l #0,d0 |
1234 | move.b d5,d0 |
1235 | lsl.w #7,d0 |
1236 | add.w d0,a0 |
1237 | jsr load_prepare |
1238 | move.w #'>',(a0) |
1239 | |
1240 | /* input */ |
1241 | jsr get_input /* x0cbrldu x1sa00du */ |
1242 | |
1243 | move.w d0,d1 |
1244 | and.w #3,d1 |
1245 | beq mgp_no_ud |
1246 | btst.l #0,d0 |
1247 | sne d2 |
1248 | or.b #1,d2 /* up -1, down 1 */ |
1249 | add.b d2,d5 |
1250 | cmp.b #0,d5 |
1251 | bge 0f |
1252 | move.b #predef_addr_cnt-1,d5 |
1253 | 0: |
1254 | cmp.b #predef_addr_cnt-1,d5 |
1255 | ble 0f |
1256 | move.b #0,d5 |
1257 | 0: |
318e20ff |
1258 | bra vbl_end |
27d5cc88 |
1259 | |
1260 | mgp_no_ud: |
1261 | btst.l #4,d0 /* A - confirm */ |
1262 | beq mgp_no_a |
1263 | moveq.l #0,d0 |
1264 | move.b d5,d0 |
1265 | lsl.w #2,d0 |
318e20ff |
1266 | lea (predef_addrs,pc),a0 |
27d5cc88 |
1267 | move.l (a0,d0),d5 |
1268 | lsl.l #8,d5 |
318e20ff |
1269 | bra mode_goto_finish |
27d5cc88 |
1270 | |
1271 | mgp_no_a: |
1272 | move.w d0,d1 |
1273 | and.w #0x3000,d1 |
1274 | beq mgp_no_bc |
1275 | bra return_to_main |
1276 | |
1277 | mgp_no_bc: |
318e20ff |
1278 | bra vbl_end |
27d5cc88 |
1279 | |
d90ff128 |
1280 | ##################### jmp ######################## |
1281 | |
1282 | mode_jmp_addr: |
1283 | btst.l #7,d6 |
1284 | bne mode_jmp_finish |
1285 | |
1286 | moveq.l #0,d5 |
1287 | or.b #3,d5 /* 3 bytes */ |
1288 | bclr.l #7,d6 |
1289 | change_mode MMODE_VAL_INPUT, MMODE_JMP_ADDR |
318e20ff |
1290 | bra vbl_end |
d90ff128 |
1291 | |
1292 | mode_jmp_finish: |
1293 | lsr.l #8,d5 |
1294 | write_vdp_r_dst 1,(VDP1_E_DISPLAY | VDP1_MODE5),(GFXCNTL) /* disable vint */ |
1295 | move.l d5,a0 |
1296 | jmp (a0) |
1297 | |
80560599 |
1298 | mode_transfer: |
8689c962 |
1299 | move.b #0x40,(0xa1000b).l /* port 2 ctrl */ |
1300 | move.b #0x00,(0xa10005).l /* port 2 data - start with TH low */ |
80560599 |
1301 | |
8689c962 |
1302 | lea (txt_transfer_ready,pc),a0 |
80560599 |
1303 | move.l #13,d0 |
1304 | move.l #13,d1 |
1305 | move.l #0x8000,d2 |
1306 | jsr print |
1307 | |
1308 | wait_tl_low0: |
1309 | move.b (0xa10005),d0 |
1310 | btst.b #4,d0 |
1311 | bne wait_tl_low0 |
1312 | |
1313 | menu_text txt_working, 13, 13, 0 |
8689c962 |
1314 | bra do_transfer |
27d5cc88 |
1315 | |
4dfddc2f |
1316 | # go back to main mode |
1317 | return_to_main: |
5f6473d9 |
1318 | bclr.l #7,d6 /* not edited */ |
4dfddc2f |
1319 | change_mode MMODE_MAIN, MMODE_MAIN |
27d5cc88 |
1320 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320),(GFXCNTL) |
318e20ff |
1321 | bra vbl_end |
fbad1b76 |
1322 | |
1323 | |
4db6e09f |
1324 | ################################################# |
1325 | # # |
1326 | # Initialize VDP registers # |
1327 | # # |
1328 | ################################################# |
1329 | |
1330 | init_gfx: |
1331 | move.l #GFXCNTL,a3 |
570c4371 |
1332 | write_vdp_reg 0,(VDP0_E_DISPLAY | VDP0_PLTT_FULL) |
318e20ff |
1333 | write_vdp_reg 1,(VDP1_E_DISPLAY | VDP1_MODE5) |
4db6e09f |
1334 | write_vdp_reg 2,(0xe000 >> 10) /* Screen map a adress */ |
1335 | write_vdp_reg 3,(0xe000 >> 10) /* Window address */ |
1336 | write_vdp_reg 4,(0xc000 >> 13) /* Screen map b address */ |
1337 | write_vdp_reg 5,(0xfc00 >> 9) /* Sprite address */ |
1338 | write_vdp_reg 6,0 |
570c4371 |
1339 | write_vdp_reg 7,0 /* Backdrop color */ |
80560599 |
1340 | write_vdp_reg 0x0a,1 /* Lines per hblank interrupt */ |
1341 | write_vdp_reg 0x0b,0 /* 2-cell vertical scrolling */ |
1342 | write_vdp_reg 0x0c,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320) |
1343 | write_vdp_reg 0x0d,(0x8000 >> 10) /* Horizontal scroll address */ |
1344 | write_vdp_reg 0x0e,0 |
1345 | write_vdp_reg 0x0f,2 |
1346 | write_vdp_reg 0x10,(VDP16_MAP_V32 | VDP16_MAP_H64) /* layer size */ |
1347 | write_vdp_reg 0x11,0 |
1348 | write_vdp_reg 0x12,0 |
4db6e09f |
1349 | rts |
1350 | |
1351 | |
d4279640 |
1352 | # get mask of bits representing safe words |
27d5cc88 |
1353 | # a1 - address to check |
1354 | # destroys d0-d2, strips upper bits from a1 |
d4279640 |
1355 | get_safety_mask: |
27d5cc88 |
1356 | move.l a1,d1 |
1357 | lsl.l #8,d1 |
1358 | lsr.l #8,d1 |
318e20ff |
1359 | lea (safe_addrs,pc),a1 |
27d5cc88 |
1360 | move.w #(safe_addrs_end - safe_addrs)/8-1,d2 |
1361 | 0: |
1362 | move.l (a1)+,d0 |
1363 | cmp.l d0,d1 |
1364 | blt 1f |
1365 | move.l (a1),d0 |
1366 | cmp.l d0,d1 |
1367 | ble addr_safe |
1368 | 1: |
1369 | addq.l #4,a1 |
1370 | dbra d2,0b |
1371 | |
27d5cc88 |
1372 | move.l d1,a1 |
d4279640 |
1373 | |
1374 | moveq.l #0x0c,d0 |
1375 | cmp.l #0xa14000,d1 |
1376 | beq gsm_rts |
1377 | |
1378 | moveq.l #0x08,d0 |
1379 | cmp.l #0xa14100,d1 |
1380 | beq gsm_rts |
1381 | |
1382 | /* check for VDP address */ |
1383 | move.l d1,d0 |
1384 | swap d0 |
1385 | and.b #0xe0,d0 |
1386 | cmp.b #0xc0,d0 |
1387 | bne addr_unsafe /* not vdp */ |
1388 | |
1389 | move.l d1,d0 |
1390 | and.l #0x0700e0,d0 |
1391 | bne addr_unsafe |
1392 | |
1393 | move.l d1,d0 |
1394 | and.b #0x1f,d0 |
1395 | cmp.b #0x04,d0 |
1396 | blt addr_hsafe_3 /* data port */ |
1397 | cmp.b #0x10,d0 |
1398 | blt addr_safe /* below PSG */ |
1399 | cmp.b #0x18,d0 |
1400 | bge addr_safe /* above PSG */ |
1401 | |
1402 | addr_unsafe: |
1403 | moveq.l #0,d0 /* skip line */ |
1404 | rts |
1405 | |
1406 | addr_hsafe_3: |
1407 | moveq.l #3,d0 /* skip 2 words */ |
27d5cc88 |
1408 | rts |
1409 | |
1410 | addr_safe: |
1411 | move.l d1,a1 |
d4279640 |
1412 | moveq.l #0xf,d0 |
1413 | gsm_rts: |
27d5cc88 |
1414 | rts |
1415 | |
1416 | |
1286a1ba |
1417 | # read single phase from controller |
fbad1b76 |
1418 | # #a0 - addr |
1286a1ba |
1419 | # d0 - result |
fbad1b76 |
1420 | # destroys d1,d2 |
1286a1ba |
1421 | get_input: |
1422 | move.b #0x40,(0xa10003) |
1423 | nop |
1424 | nop |
1425 | nop |
1426 | move.b (0xa10003),d0 |
1427 | move.b #0x00,(0xa10003) |
1428 | lsl.w #8,d0 |
1429 | nop |
1430 | move.b (0xa10003),d0 |
1431 | eor.w #0xffff,d0 |
fbad1b76 |
1432 | |
1433 | swap d7 |
1434 | move.w d7,d1 |
1435 | eor.w d0,d1 /* changed btns */ |
1436 | move.w d0,d7 /* old val */ |
1437 | swap d7 |
1438 | and.w d0,d1 /* what changed now */ |
1439 | bne 0f |
1440 | |
1441 | addq.b #1,d6 |
1442 | move.b d6,d2 |
27d5cc88 |
1443 | and.b #0x0f,d2 /* do autorepeat */ |
1444 | cmp.b #9,d2 |
fbad1b76 |
1445 | bne 1f |
1446 | move.w d0,d1 |
1447 | 0: |
27d5cc88 |
1448 | and.b #0xf0,d6 |
fbad1b76 |
1449 | 1: |
1450 | swap d0 |
1451 | move.w d1,d0 |
1286a1ba |
1452 | rts |
1453 | |
4dfddc2f |
1454 | # Prepare to write to VDP RAM @a0 |
0fc4f06b |
1455 | # sets a0 to VDP data port for convenience |
1456 | # a0: VRAM base |
1457 | # destroys d0 |
570c4371 |
1458 | |
4db6e09f |
1459 | load_prepare: |
0fc4f06b |
1460 | VRAM_ADDR_var a0 |
1461 | move.l d0,(GFXCNTL).l |
1462 | move.l #GFXDATA,a0 |
4db6e09f |
1463 | rts |
1464 | |
1465 | |
0fc4f06b |
1466 | # Load color data from ROM |
1467 | # a0: CRAM base |
1468 | # a1: color list address |
1469 | # d0: number of colors to load |
1470 | # destroys d1 |
4db6e09f |
1471 | |
1472 | load_colors: |
0fc4f06b |
1473 | move.l d0,d1 |
1474 | CRAM_ADDR_var a0 |
1475 | move.l d0,(GFXCNTL).l |
4db6e09f |
1476 | |
0fc4f06b |
1477 | move.l #GFXDATA,a0 |
1478 | subq.w #1,d1 |
1479 | 0: |
1480 | move.w (a1)+,(a0) |
1481 | dbra d1,0b |
4db6e09f |
1482 | |
1483 | rts |
1484 | |
0fc4f06b |
1485 | |
1486 | # print |
1487 | # a0 - string |
1488 | # d0 - x |
1489 | # d1 - y |
4dfddc2f |
1490 | # d2 - tile_bits[15:11] |
0fc4f06b |
1491 | # destroys a1 |
570c4371 |
1492 | |
1493 | print: |
0fc4f06b |
1494 | move.l a0,a1 |
1286a1ba |
1495 | XY2NT |
0fc4f06b |
1496 | jsr load_prepare |
4dfddc2f |
1497 | move.l d2,d0 |
1498 | and.w #0xf800,d0 |
570c4371 |
1499 | |
1500 | _print_loop: |
0fc4f06b |
1501 | move.b (a1)+,d0 |
570c4371 |
1502 | beq _print_end |
1503 | |
0fc4f06b |
1504 | move.w d0,(a0) |
318e20ff |
1505 | bra _print_loop |
570c4371 |
1506 | |
1507 | _print_end: |
1508 | rts |
1509 | |
4db6e09f |
1510 | |
1286a1ba |
1511 | # print_hex |
1512 | # d0 - x |
1513 | # d1 - y |
1514 | # d2 - value |
27d5cc88 |
1515 | # d3 - tile_bits[15:11]|digit_cnt[7:0] |
4276cd7a |
1516 | # destroys a0, preserves d3 |
1286a1ba |
1517 | |
1518 | print_hex: |
1519 | XY2NT |
1520 | jsr load_prepare |
1521 | |
1522 | print_hex_preped: |
4276cd7a |
1523 | moveq.l #0,d0 |
1524 | move.b d3,d0 |
1525 | move.l d0,d1 |
1286a1ba |
1526 | lsl.b #2,d0 |
1527 | ror.l d0,d2 /* prep value */ |
4276cd7a |
1528 | subq.l #1,d1 /* count */ |
1529 | move.w d3,d0 |
1530 | and.w #0xf800,d0 /* keep upper bits in d0 */ |
1286a1ba |
1531 | |
1532 | _print_hex_loop: |
1533 | rol.l #4,d2 |
1534 | move.b d2,d0 |
1535 | and.b #0xf,d0 |
1286a1ba |
1536 | |
1537 | add.b #'0',d0 |
4276cd7a |
1538 | cmp.b #'9',d0 |
1539 | ble 0f |
1540 | addq.b #7,d0 |
1541 | 0: |
1286a1ba |
1542 | move.w d0,(a0) |
4276cd7a |
1543 | dbra d1,_print_hex_loop |
1286a1ba |
1544 | |
1545 | rts |
1546 | |
1547 | |
318e20ff |
1548 | # wait vertical sync interrupt |
4db6e09f |
1549 | |
1550 | wait_vsync: |
fbad1b76 |
1551 | move.b d7,d0 |
4db6e09f |
1552 | _wait_change: |
1553 | stop #0x2000 |
fbad1b76 |
1554 | cmp.b d7,d0 |
4db6e09f |
1555 | beq _wait_change |
1556 | rts |
1557 | |
1558 | |
318e20ff |
1559 | # wait vsync start (polling) |
1560 | # destroys a0,d0 |
1561 | |
1562 | wait_vsync_poll: |
1563 | move.l #GFXCNTL,a0 |
1564 | 0: |
1565 | move.w (a0),d0 |
1566 | and.b #8,d0 |
1567 | nop |
1568 | nop |
1569 | bne 0b |
1570 | 0: |
1571 | move.w (a0),d0 |
1572 | and.b #8,d0 |
1573 | nop |
1574 | nop |
1575 | beq 0b |
1576 | rts |
1577 | |
1578 | |
ff17c043 |
1579 | test_code: |
ff17c043 |
1580 | nop |
ff17c043 |
1581 | |
1582 | test_code_ret_op: |
1583 | jmp 0x123456 /* will be patched */ |
1584 | test_code_end: |
1585 | |
4db6e09f |
1586 | ################################################# |
1587 | # # |
1588 | # RAM DATA # |
1589 | # # |
1590 | ################################################# |
1591 | |
1592 | .bss |
570c4371 |
1593 | |
fbad1b76 |
1594 | # nothing :) |
4db6e09f |
1595 | |
1596 | .end |
1597 | |
1598 | # vim:filetype=asmM68k |