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 | |
32 | .text |
33 | .globl main |
d4279640 |
34 | .globl INT |
1286a1ba |
35 | .globl VBL |
4db6e09f |
36 | |
37 | ################################################## |
38 | # # |
39 | # Register and bitmask definitions # |
40 | # # |
41 | ################################################## |
42 | |
43 | .equ GFXDATA, 0xc00000 |
44 | .equ GFXCNTL, 0xc00004 |
45 | |
46 | .equ VDP0_E_HBI, 0x10 |
47 | .equ VDP0_E_DISPLAY, 0x02 |
48 | .equ VDP0_PLTT_FULL, 0x04 |
49 | |
50 | .equ VDP1_SMS_MODE, 0x80 |
51 | .equ VDP1_E_DISPLAY, 0x40 |
52 | .equ VDP1_E_VBI, 0x20 |
53 | .equ VDP1_E_DMA, 0x10 |
54 | .equ VDP1_NTSC, 0x00 |
55 | .equ VDP1_PAL, 0x08 |
d90ff128 |
56 | .equ VDP1_MODE5, 0x04 |
4db6e09f |
57 | |
fbad1b76 |
58 | .equ VDP12_STE, 0x08 |
4db6e09f |
59 | .equ VDP12_SCREEN_V224, 0x00 |
60 | .equ VDP12_SCREEN_V448, 0x04 |
61 | .equ VDP12_PROGRESSIVE, 0x00 |
62 | .equ VDP12_INTERLACED, 0x02 |
63 | .equ VDP12_SCREEN_H256, 0x00 |
64 | .equ VDP12_SCREEN_H320, 0x81 |
65 | |
66 | .equ VDP16_MAP_V32, 0x00 |
67 | .equ VDP16_MAP_V64, 0x10 |
68 | .equ VDP16_MAP_V128, 0x30 |
69 | .equ VDP16_MAP_H32, 0x00 |
70 | .equ VDP16_MAP_H64, 0x01 |
71 | .equ VDP16_MAP_H128, 0x03 |
72 | |
4dfddc2f |
73 | .equ MMODE_MAIN, 0 |
74 | .equ MMODE_VAL_INPUT, 1 |
75 | .equ MMODE_EDIT_VAL, 2 |
76 | .equ MMODE_GOTO, 3 |
27d5cc88 |
77 | .equ MMODE_START_MENU, 4 |
78 | .equ MMODE_GOTO_PREDEF, 5 |
d90ff128 |
79 | .equ MMODE_JMP_ADDR, 6 |
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80 | |
27d5cc88 |
81 | .equ predef_addr_cnt, ((predef_addrs_end-predef_addrs)/4) |
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82 | |
83 | ################################################## |
84 | # # |
85 | # MACROS # |
86 | # # |
87 | ################################################## |
88 | |
89 | |
27d5cc88 |
90 | # Write val to VDP register reg |
91 | .macro write_vdp_r_dst reg val dst |
92 | move.w #((\reg << 8) + 0x8000 + \val),\dst |
4db6e09f |
93 | .endm |
94 | |
27d5cc88 |
95 | # Write val to VDP register reg, vdp addr in a3 |
96 | .macro write_vdp_reg reg val |
97 | write_vdp_r_dst \reg, \val, (a3) |
98 | .endm |
4db6e09f |
99 | |
d90ff128 |
100 | # Set up address in VDP, control port in dst |
101 | .macro VRAM_ADDR adr dst |
102 | move.l #(((0x4000 | (\adr & 0x3fff)) << 16) | (\adr >> 14)),\dst |
0fc4f06b |
103 | .endm |
104 | |
105 | |
106 | # make VDP word from address adr and store in d0 |
107 | .macro XRAM_ADDR_var adr |
570c4371 |
108 | move.l \adr,d0 |
0fc4f06b |
109 | lsl.l #8,d0 |
110 | lsl.l #8,d0 |
111 | rol.l #2,d0 |
112 | lsl.b #2,d0 |
113 | lsr.l #2,d0 |
4db6e09f |
114 | .endm |
115 | |
116 | |
0fc4f06b |
117 | .macro VRAM_ADDR_var adr |
118 | XRAM_ADDR_var \adr |
119 | or.l #0x40000000,d0 |
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120 | .endm |
121 | |
122 | |
0fc4f06b |
123 | .macro CRAM_ADDR_var adr |
124 | XRAM_ADDR_var \adr |
125 | or.l #0xc0000000,d0 |
4db6e09f |
126 | .endm |
127 | |
128 | |
1286a1ba |
129 | # convert tile coords in d0, d1 to nametable addr to a0 |
130 | .macro XY2NT |
131 | lsl.w #6,d1 |
132 | add.w d1,d0 |
133 | lsl.w #1,d0 |
134 | movea.l #0xe000,a0 |
135 | add.w d0,a0 |
136 | .endm |
137 | |
4276cd7a |
138 | # check if some d-pad button (and modifier) is pressed |
fbad1b76 |
139 | .macro do_dpad bit op val |
140 | btst.l #\bit,d0 |
141 | beq 0f |
142 | \op.l \val,a6 |
143 | bra dpad_end |
4276cd7a |
144 | 0: |
4276cd7a |
145 | .endm |
146 | |
4dfddc2f |
147 | # convert a6 to normal addr |
148 | # destroys d0 |
149 | .macro mk_a6_addr reg |
150 | move.l a6,\reg |
151 | moveq.l #0,d0 |
152 | move.b \reg,d0 |
153 | lsr.l #8,\reg |
154 | add.l d0,\reg |
155 | .endm |
156 | |
157 | .macro change_mode mode_new mode_back |
158 | and.w #0xc0ff,d7 |
159 | or.w #(\mode_back<<11)|(\mode_new<<8),d7 |
160 | .endm |
161 | |
27d5cc88 |
162 | .macro menu_text str x y pal |
163 | lea \str,a0 |
164 | move.l #\x,d0 |
165 | move.l #\y,d1 |
166 | move.l #0x8000|(\pal<<13),d2 |
167 | jsr print |
168 | .endm |
169 | |
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170 | ################################################# |
171 | # # |
172 | # DATA # |
173 | # # |
174 | ################################################# |
175 | |
176 | colors: |
4276cd7a |
177 | dc.w 0x0000,0x0eee,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
178 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
179 | dc.w 0x0000,0x02e2,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
180 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
181 | dc.w 0x0000,0x0e44,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
182 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
d4279640 |
183 | dc.w 0x0000,0x044e,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
184 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
570c4371 |
185 | colors_end: |
186 | |
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187 | |
188 | sprite_data: |
189 | /* Y size link attr X */ |
570c4371 |
190 | dc.w 0; dc.b 0x05; dc.b 0; dc.w 0x6002; dc.w 0 |
4db6e09f |
191 | sprite_data_end: |
192 | |
27d5cc88 |
193 | predef_addrs: |
194 | dc.l 0x000000, 0x200000, 0x400000, 0xa00000, 0xa10000 |
d4279640 |
195 | dc.l 0xa11100, 0xa12000, 0xa13000, 0xa14000, 0xc00000 |
27d5cc88 |
196 | predef_addrs_end: |
197 | |
198 | safe_addrs: |
199 | dc.l 0x000000, 0x7fffff |
200 | dc.l 0xe00000, 0xffffff |
d4279640 |
201 | dc.l 0xa00000, 0xa100ff |
202 | dc.l 0xa11000, 0xa113ff |
203 | dc.l 0xa12000, 0xa120ff |
204 | dc.l 0xa13000, 0xa130ff |
27d5cc88 |
205 | safe_addrs_end: |
206 | |
4dfddc2f |
207 | txt_edit: |
208 | .ascii "- edit -\0" |
209 | txt_a_confirm: |
210 | .ascii "A-confirm\0" |
27d5cc88 |
211 | txt_about: |
212 | .ascii "hexed r1\0" |
213 | txt_goto: |
214 | .ascii "Go to address\0" |
215 | txt_goto_predef: |
216 | .ascii "Go to (predef)\0" |
d90ff128 |
217 | txt_jmp_addr: |
218 | .ascii "Jump to address\0" |
27d5cc88 |
219 | txt_dtack: |
220 | .ascii "DTACK safety\0" |
d4279640 |
221 | txt_dtack_err: |
222 | .ascii "DTACK err?\0" |
223 | txt_exc: |
224 | .ascii "Exception \0" |
4dfddc2f |
225 | |
4db6e09f |
226 | ################################################## |
227 | # # |
228 | # MAIN PROGRAM # |
229 | # # |
230 | ################################################## |
27d5cc88 |
231 | |
232 | # global regs: |
233 | # a6 = page_start[31:8]|cursor_offs[7:0] |
234 | # d7 = old_inputs[31:16]|edit_bytes[15:14]|g_mode_old[13:11]|g_mode[10:8]|irq_cnt[7:0] |
235 | # d6 = edit_word_save[31:15]|edit_done[7]|no_dtack_detect[4]|autorep_cnt[3:0] |
236 | # d5 = main: tmp |
237 | # edit: edit_word[31:8]|edit_pos[4:2]|byte_cnt[1:0] |
238 | # menu: sel |
239 | |
570c4371 |
240 | .align 2 |
241 | |
4db6e09f |
242 | main: |
4276cd7a |
243 | /* mask irqs during init */ |
1286a1ba |
244 | move.w #0x2700,sr |
245 | |
27d5cc88 |
246 | .if 0 |
247 | /* copy */ |
248 | lea (0,pc),a0 |
249 | move.l a0,d0 |
250 | swap d0 |
251 | lsr.l #4,d0 |
252 | and.b #0x0f,d0 |
253 | cmp.b #0,d0 |
254 | bne 0f |
255 | |
256 | move.w #8000/2,d0 |
257 | move.l #0,a0 |
258 | move.l #0x400000,a1 |
259 | 1: |
260 | move.w (a0)+,(a1)+ |
261 | dbra d0,1b |
262 | 0: |
263 | .endif |
264 | |
1286a1ba |
265 | movea.l #0,a6 |
4dfddc2f |
266 | move.l #0x8000,d7 |
fbad1b76 |
267 | moveq.l #0,d6 |
1286a1ba |
268 | |
269 | /* Init pads */ |
270 | move.b #0x40,(0xa10009).l |
271 | move.b #0x40,(0xa10003).l |
272 | |
4db6e09f |
273 | /* Initialize VDP */ |
274 | jsr init_gfx |
275 | |
276 | /* Load color data */ |
0fc4f06b |
277 | movea.l #0,a0 |
278 | movea.l #colors,a1 |
279 | moveq.l #(colors_end-colors)/2,d0 |
4db6e09f |
280 | jsr load_colors |
281 | |
d90ff128 |
282 | /* load font patterns */ |
283 | lea GFXDATA,a0 |
284 | lea font,a1 |
285 | VRAM_ADDR 0,(GFXCNTL) |
286 | move.w #128*8,d3 |
287 | font_loop: |
288 | moveq.l #8-1,d2 |
289 | moveq.l #0,d1 |
290 | move.b (a1)+,d0 |
291 | 0: |
292 | lsr.b #1,d0 |
293 | roxl.l #1,d1 |
294 | ror.l #5,d1 |
295 | dbra d2,0b |
296 | |
297 | rol.l #1,d1 /* fixup */ |
298 | move.l d1,(a0) |
299 | dbra d3,font_loop |
4db6e09f |
300 | |
301 | /* generate A layer map */ |
1286a1ba |
302 | movea.l #0xe000,a1 |
4db6e09f |
303 | move.l #28-1,d4 |
304 | lmaploop0: |
1286a1ba |
305 | movea.l a1,a0 |
4db6e09f |
306 | jsr load_prepare |
307 | |
570c4371 |
308 | move.l #64/2-1,d3 |
0fc4f06b |
309 | 0: move.l #0x00000000,(a0) |
4db6e09f |
310 | dbra d3,0b |
311 | |
1286a1ba |
312 | add.l #64*2,a1 |
4db6e09f |
313 | dbra d4,lmaploop0 |
314 | |
315 | /* generate B layer map */ |
0fc4f06b |
316 | movea.l #0xc000,a0 |
4db6e09f |
317 | jsr load_prepare |
318 | |
570c4371 |
319 | move.l #64*28/2-1,d3 |
0fc4f06b |
320 | 0: move.l #0x00000000,(a0) |
4db6e09f |
321 | dbra d3,0b |
322 | |
323 | /* upload sprite data */ |
0fc4f06b |
324 | movea.l #0xfc00,a0 |
4db6e09f |
325 | jsr load_prepare |
0fc4f06b |
326 | movea.l #sprite_data,a1 |
4db6e09f |
327 | |
328 | move.l #(sprite_data_end-sprite_data)/2-1,d3 |
0fc4f06b |
329 | 0: move.l (a1)+,(a0) |
4db6e09f |
330 | dbra d3,0b |
331 | |
d4279640 |
332 | /* wait for vsync before unmask */ |
333 | move.l #GFXCNTL,a3 |
74d5977b |
334 | 0: |
335 | move.w (a3),d0 |
336 | and.b #8,d0 |
337 | nop |
338 | nop |
339 | bne 0b |
d4279640 |
340 | 0: |
341 | move.w (a3),d0 |
342 | and.b #8,d0 |
343 | nop |
344 | nop |
345 | beq 0b |
346 | |
74d5977b |
347 | /* wait a bit to avoid nested vint */ |
348 | move.w #20,d0 |
349 | 0: |
350 | dbra d0,0b /* 10 cycles to go back */ |
351 | |
352 | /* enable vint */ |
353 | move.w #0x2000,sr |
570c4371 |
354 | |
4db6e09f |
355 | ################################################## |
1286a1ba |
356 | |
4db6e09f |
357 | forever: |
4db6e09f |
358 | jsr wait_vsync |
359 | bra forever |
4db6e09f |
360 | |
361 | |
d4279640 |
362 | INT: |
363 | /* let's hope VRAM is already set up.. */ |
364 | lea txt_exc,a0 |
365 | move.l #9,d0 |
366 | move.l #27,d1 |
367 | move.l #0xe000,d2 |
368 | jsr print |
369 | bra forever |
370 | |
371 | ################################################## |
372 | |
1286a1ba |
373 | VBL: |
fbad1b76 |
374 | addq.b #1,d7 |
d90ff128 |
375 | # movem.l d0-d4/a0-a5,-(a7) |
1286a1ba |
376 | |
fbad1b76 |
377 | moveq.l #0,d0 |
378 | move.w d7,d0 |
379 | lsr.w #6,d0 |
380 | and.w #0x1c,d0 |
381 | move.l (jumptab,pc,d0),a0 |
382 | jmp (a0) |
383 | jumptab: |
384 | dc.l mode_main |
4dfddc2f |
385 | dc.l mode_val_input |
386 | dc.l mode_edit_val /* edit val in editor */ |
387 | dc.l mode_goto |
27d5cc88 |
388 | dc.l mode_start_menu |
389 | dc.l mode_goto_predef |
d90ff128 |
390 | dc.l mode_jmp_addr |
fbad1b76 |
391 | dc.l mode_main |
392 | |
393 | ##################### main ####################### |
394 | |
395 | mode_main: |
d4279640 |
396 | /* assume we will hang */ |
397 | lea txt_dtack_err,a0 |
398 | move.l #9,d0 |
399 | move.l #27,d1 |
400 | move.l #0xe000,d2 |
401 | jsr print |
402 | |
403 | moveq.l #0,d1 |
1286a1ba |
404 | move.l a6,d0 |
4276cd7a |
405 | move.b d0,d1 |
1286a1ba |
406 | lsr.l #8,d0 |
407 | move.l d0,a1 /* current addr */ |
4276cd7a |
408 | lsr.b #3,d1 |
409 | neg.b d1 |
410 | add.b #27-1,d1 /* line where the cursor sits */ |
411 | swap d1 |
1286a1ba |
412 | |
27d5cc88 |
413 | movea.l #0xe002,a2 |
4276cd7a |
414 | move.l #27-1,d5 /* line counter for dbra */ |
415 | or.l d1,d5 |
1286a1ba |
416 | |
27d5cc88 |
417 | draw_row: |
1286a1ba |
418 | move.l a2,a0 |
419 | jsr load_prepare |
420 | |
27d5cc88 |
421 | btst.l #15,d7 |
422 | beq 0f |
423 | move.w #' ',(a0) |
424 | 0: |
1286a1ba |
425 | /* addr */ |
426 | move.l a1,d2 |
427 | moveq.l #6,d3 |
428 | jsr print_hex_preped |
429 | |
27d5cc88 |
430 | btst.l #4,d6 |
431 | bne draw_row_safe |
432 | |
d4279640 |
433 | bsr get_safety_mask |
434 | cmp.b #0xf,d0 |
435 | beq draw_row_safe |
27d5cc88 |
436 | |
d4279640 |
437 | # unsafe or partially safe |
438 | draw_row_hsafe: |
439 | move.l d0,d4 |
440 | swap d4 /* mask in upper word */ |
27d5cc88 |
441 | btst.l #15,d7 |
d4279640 |
442 | bne draw_row_hsafe_words_pre |
27d5cc88 |
443 | |
d4279640 |
444 | draw_row_hsafe_bytes_pre: |
27d5cc88 |
445 | /* 8 bytes */ |
d4279640 |
446 | moveq.l #2,d3 |
447 | move.w #3,d4 |
448 | |
449 | draw_row_hsafe_bytes: |
27d5cc88 |
450 | move.w #' ',(a0) |
d4279640 |
451 | move.b d4,d0 |
452 | add.b #16,d0 |
453 | btst.l d0,d4 |
454 | bne 0f |
27d5cc88 |
455 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
456 | move.w #' ',(a0) |
457 | move.l #'?'|('?'<<16),(a0) |
458 | bra 1f |
459 | 0: |
460 | move.b (0,a1),d2 |
461 | jsr print_hex_preped |
462 | move.w #' ',(a0) |
463 | move.b (1,a1),d2 |
464 | jsr print_hex_preped |
465 | 1: |
466 | addq.l #2,a1 |
467 | dbra d4,draw_row_hsafe_bytes |
27d5cc88 |
468 | |
469 | move.w #' ',(a0) |
470 | |
471 | move.l d5,d0 |
472 | swap d0 |
473 | cmp.w d5,d0 |
474 | beq draw_cursor_unsafe_byte |
d4279640 |
475 | bra draw_chars_hsafe_pre |
27d5cc88 |
476 | |
d4279640 |
477 | draw_row_hsafe_words_pre: |
27d5cc88 |
478 | /* 4 shorts */ |
d4279640 |
479 | moveq.l #4,d3 |
480 | move.w #3,d4 |
481 | |
482 | draw_row_hsafe_words: |
27d5cc88 |
483 | move.w #' ',(a0) |
d4279640 |
484 | move.b d4,d0 |
485 | add.b #16,d0 |
486 | btst.l d0,d4 |
487 | bne 0f |
27d5cc88 |
488 | move.l #'?'|('?'<<16),(a0) |
489 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
490 | bra 1f |
491 | 0: |
492 | move.w (a1),d2 |
493 | jsr print_hex_preped |
494 | 1: |
495 | addq.l #2,a1 |
496 | dbra d4,draw_row_hsafe_words |
27d5cc88 |
497 | |
498 | move.l #(' '<<16)|' ',(a0) |
499 | |
500 | move.l d5,d0 |
501 | swap d0 |
502 | cmp.w d5,d0 |
503 | beq draw_cursor_unsafe_word |
504 | |
d4279640 |
505 | draw_chars_hsafe_pre: |
506 | subq.l #8,a1 |
507 | move.w #3,d4 |
508 | moveq.l #0,d0 |
509 | |
510 | draw_chars_hsafe: |
511 | move.b d4,d0 |
512 | add.b #16,d0 |
513 | btst.l d0,d4 |
514 | bne 0f |
27d5cc88 |
515 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
516 | bra draw_chars_hsafe_next |
517 | 0: |
518 | btst.l #15,d7 /* must perform correct read type */ |
519 | bne 0f /* doing byte reads on security reg hangs */ |
520 | move.b (0,a1),d0 |
521 | lsl.l #8,d0 |
522 | move.b (1,a1),d0 |
523 | bra 1f |
524 | 0: |
525 | move.w (a1),d0 |
526 | 1: |
527 | ror.l #8,d0 |
528 | move.b d0,d1 |
529 | sub.b #0x20,d1 |
530 | cmp.b #0x60,d1 |
531 | blo 0f |
532 | move.b #'.',d0 |
533 | 0: |
534 | move.w d0,(a0) |
535 | |
536 | move.b #0,d0 |
537 | rol.l #8,d0 |
538 | move.b d0,d1 |
539 | sub.b #0x20,d1 |
540 | cmp.b #0x60,d1 |
541 | blo 0f |
542 | move.b #'.',d0 |
543 | 0: |
544 | move.w d0,(a0) |
545 | |
546 | draw_chars_hsafe_next: |
547 | addq.l #2,a1 |
548 | dbra d4,draw_chars_hsafe |
27d5cc88 |
549 | |
550 | move.l #(' '<<16)|' ',(a0) |
27d5cc88 |
551 | add.w #0x80,a2 |
552 | dbra d5,draw_row |
553 | bra draw_status_bar |
554 | |
555 | |
556 | # normal draw |
557 | draw_row_safe: |
558 | btst.l #15,d7 |
559 | bne draw_row_words |
560 | |
561 | draw_row_bytes: |
562 | /* 8 bytes */ |
563 | moveq.l #2,d3 |
564 | moveq.l #8-1,d4 |
565 | draw_bytes: |
566 | move.w #' ',(a0) |
567 | move.b (a1)+,d2 |
568 | jsr print_hex_preped |
569 | dbra d4,draw_bytes |
570 | |
571 | move.w #' ',(a0) |
572 | |
573 | move.l d5,d0 |
574 | swap d0 |
575 | cmp.w d5,d0 |
576 | beq draw_cursor_byte |
577 | bra draw_chars_pre |
578 | |
579 | draw_row_words: |
1286a1ba |
580 | /* 4 shorts */ |
4276cd7a |
581 | moveq.l #4,d3 |
1286a1ba |
582 | moveq.l #4-1,d4 |
27d5cc88 |
583 | draw_words: |
1286a1ba |
584 | move.w #' ',(a0) |
585 | move.w (a1)+,d2 |
1286a1ba |
586 | jsr print_hex_preped |
27d5cc88 |
587 | dbra d4,draw_words |
588 | |
589 | move.l #(' '<<16)|' ',(a0) |
1286a1ba |
590 | |
4276cd7a |
591 | move.l d5,d0 |
592 | swap d0 |
593 | cmp.w d5,d0 |
27d5cc88 |
594 | beq draw_cursor_word |
4276cd7a |
595 | |
596 | draw_chars_pre: |
1286a1ba |
597 | /* 8 chars */ |
598 | subq.l #8,a1 |
599 | moveq.l #8-1,d4 |
600 | draw_chars: |
601 | move.b (a1)+,d0 |
602 | move.b d0,d1 |
603 | sub.b #0x20,d1 |
604 | cmp.b #0x60,d1 |
605 | blo 0f |
606 | move.w #'.',d0 |
607 | 0: |
608 | move.w d0,(a0) |
609 | dbra d4,draw_chars |
610 | |
27d5cc88 |
611 | move.l #(' '<<16)|' ',(a0) |
612 | |
1286a1ba |
613 | add.w #0x80,a2 |
27d5cc88 |
614 | dbra d5,draw_row |
1286a1ba |
615 | |
d4279640 |
616 | |
27d5cc88 |
617 | draw_status_bar: |
4276cd7a |
618 | /* status bar */ |
27d5cc88 |
619 | move.l a2,a0 |
4276cd7a |
620 | jsr load_prepare |
27d5cc88 |
621 | |
622 | btst.l #15,d7 |
623 | beq 0f |
624 | move.w #' ',(a0) |
625 | 0: |
4dfddc2f |
626 | mk_a6_addr d2 |
4276cd7a |
627 | move.l #0x4006,d3 |
628 | jsr print_hex_preped |
d4279640 |
629 | |
630 | /* clear error */ |
631 | moveq.l #5-1,d0 |
632 | 0: |
633 | move.l #' '|(' '<<16),(a0) |
634 | move.l #' '|(' '<<16),(a0) |
635 | dbra d0,0b |
636 | |
4276cd7a |
637 | |
1286a1ba |
638 | /* handle input */ |
639 | jsr get_input /* x0cbrldu x1sa00du */ |
1286a1ba |
640 | |
fbad1b76 |
641 | btst.l #16+4,d0 /* A - scroll modifier */ |
642 | beq input_noa |
643 | |
644 | do_dpad 16+0, sub, #0x0800 |
645 | do_dpad 16+1, add, #0x0800 |
646 | do_dpad 16+10, sub, #0xd800 |
647 | do_dpad 16+11, add, #0xd800 |
648 | input_noa: |
649 | moveq.l #0,d1 |
4dfddc2f |
650 | move.w d7,d1 |
651 | lsr.w #7,d1 |
652 | lsr.w #7,d1 |
fbad1b76 |
653 | |
654 | do_dpad 0, subq, #0x0008 |
655 | do_dpad 1, addq, #0x0008 |
656 | do_dpad 10, sub, d1 |
657 | do_dpad 11, add, d1 |
658 | |
659 | dpad_end: |
4dfddc2f |
660 | /* update addr */ |
661 | move.l a6,d1 |
662 | cmp.b #0xf0,d1 |
663 | blo 0f |
664 | sub.l #0xd800,a6 |
665 | add.w #0x00d8,a6 |
666 | bra 1f |
667 | 0: |
668 | cmp.b #0xd8,d1 |
669 | blo 1f |
670 | add.l #0xd800,a6 |
671 | sub.w #0x00d8,a6 |
672 | 1: |
673 | |
674 | /* other btns */ |
fbad1b76 |
675 | moveq.l #0,d1 |
676 | btst.l #12,d0 /* B - switch byte/word mode */ |
677 | beq input_nob |
4dfddc2f |
678 | bclr.l #15,d7 |
679 | add.w #0x4000,d7 /* changes between 01 10 */ |
fbad1b76 |
680 | move.l a6,d1 |
681 | and.l #1,d1 |
682 | sub.l d1,a6 /* make even, just in case */ |
683 | |
684 | input_nob: |
685 | btst.l #13,d0 /* C - edit selected byte */ |
686 | beq input_noc |
4dfddc2f |
687 | |
688 | change_mode MMODE_EDIT_VAL, MMODE_MAIN |
27d5cc88 |
689 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
fbad1b76 |
690 | |
691 | input_noc: |
27d5cc88 |
692 | btst.l #5,d0 /* Start - menu */ |
4dfddc2f |
693 | beq input_nos |
694 | |
27d5cc88 |
695 | moveq.l #0,d5 |
696 | change_mode MMODE_START_MENU, MMODE_MAIN |
697 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
1286a1ba |
698 | |
4dfddc2f |
699 | input_nos: |
fbad1b76 |
700 | vbl_end: |
d90ff128 |
701 | # movem.l (a7)+,d0-d4/a0-a5 |
1286a1ba |
702 | rte |
703 | |
704 | |
27d5cc88 |
705 | draw_cursor_unsafe_byte: |
706 | move.l a6,d0 |
707 | and.l #7,d0 /* byte offs */ |
708 | move.b d0,d1 |
709 | add.b d0,d0 |
710 | add.b d1,d0 /* d0 *= 3 (chars) */ |
711 | add.b d0,d0 |
712 | lea (7*2,a2,d0),a0 |
713 | jsr load_prepare |
714 | move.l #(0x2000|'?'|((0x2000|'?')<<16)),(a0) |
715 | |
716 | move.l a2,a0 |
717 | add.w #31*2,a0 |
718 | jsr load_prepare /* restore a0 */ |
d4279640 |
719 | jmp draw_chars_hsafe_pre |
27d5cc88 |
720 | |
721 | draw_cursor_unsafe_word: |
4276cd7a |
722 | move.l a6,d0 |
723 | and.l #7,d0 /* byte offs */ |
724 | move.l d0,d1 |
725 | lsr.b #1,d1 /* which word */ |
726 | move.b d1,d2 |
727 | lsl.b #2,d2 |
728 | add.b d2,d1 /* num of chars to skip */ |
27d5cc88 |
729 | add.b d1,d1 |
730 | |
731 | lea (8*2,a2,d1),a0 |
732 | jsr load_prepare |
733 | move.l #(0x2000|'?'|((0x2000|'?')<<16)),d0 |
734 | move.l d0,(a0) |
735 | move.l d0,(a0) |
736 | |
737 | move.l a2,a0 |
738 | add.w #29*2,a0 |
739 | jsr load_prepare /* restore a0 */ |
d4279640 |
740 | jmp draw_chars_hsafe_pre |
4276cd7a |
741 | |
4276cd7a |
742 | |
fbad1b76 |
743 | draw_cursor_byte: |
27d5cc88 |
744 | move.l a6,d0 |
745 | and.l #7,d0 /* byte offs */ |
746 | move.w #0x2002,d3 |
747 | |
fbad1b76 |
748 | move.b (-8,a1,d0),d2 |
27d5cc88 |
749 | move.b d0,d1 |
750 | add.b d0,d0 |
751 | add.b d1,d0 /* d0 *= 3 (chars) */ |
752 | add.b d0,d0 |
753 | lea (7*2,a2,d0),a0 |
754 | jsr load_prepare |
755 | jsr print_hex_preped |
756 | |
757 | move.l a2,a0 |
758 | add.w #31*2,a0 |
759 | jsr load_prepare /* restore a0 */ |
760 | |
761 | jmp draw_chars_pre |
fbad1b76 |
762 | |
763 | draw_cursor_word: |
27d5cc88 |
764 | move.l a6,d0 |
765 | and.l #7,d0 /* byte offs */ |
766 | move.l d0,d1 |
767 | lsr.b #1,d1 /* which word */ |
768 | move.b d1,d2 |
769 | lsl.b #2,d2 |
770 | add.b d2,d1 /* num of chars to skip */ |
771 | add.b d1,d1 |
772 | move.w #0x2004,d3 |
773 | |
fbad1b76 |
774 | move.w (-8,a1,d0),d2 |
27d5cc88 |
775 | lea (8*2,a2,d1),a0 |
4276cd7a |
776 | jsr load_prepare |
4276cd7a |
777 | jsr print_hex_preped |
778 | |
779 | move.l a2,a0 |
27d5cc88 |
780 | add.w #29*2,a0 |
4276cd7a |
781 | jsr load_prepare /* restore a0 */ |
782 | |
783 | jmp draw_chars_pre |
784 | |
785 | |
4dfddc2f |
786 | #################### hedit ####################### |
787 | |
788 | mode_edit_val: |
789 | btst.l #7,d6 |
790 | bne mode_hedit_finish |
791 | |
792 | /* read val to edit */ |
5f6473d9 |
793 | moveq.l #0,d5 |
4dfddc2f |
794 | mk_a6_addr d1 |
795 | move.l d1,a0 |
4dfddc2f |
796 | btst.l #15,d7 |
797 | bne 0f |
5f6473d9 |
798 | move.b (a0),d5 |
799 | lsl.l #8,d5 |
800 | or.b #1,d5 |
4dfddc2f |
801 | bra 1f |
802 | 0: |
5f6473d9 |
803 | move.w (a0),d5 |
804 | lsl.l #8,d5 |
805 | or.b #2,d5 |
4dfddc2f |
806 | 1: |
4dfddc2f |
807 | |
4dfddc2f |
808 | change_mode MMODE_VAL_INPUT, MMODE_EDIT_VAL |
809 | jmp vbl_end |
810 | |
811 | mode_hedit_finish: |
812 | /* write the val */ |
813 | mk_a6_addr d1 |
814 | move.l d1,a0 |
5f6473d9 |
815 | lsr.l #8,d5 |
4dfddc2f |
816 | |
817 | btst.l #15,d7 |
818 | bne 0f |
5f6473d9 |
819 | move.b d5,(a0) |
4dfddc2f |
820 | bra 1f |
821 | 0: |
5f6473d9 |
822 | move.w d5,(a0) |
4dfddc2f |
823 | 1: |
824 | |
4dfddc2f |
825 | bra return_to_main |
826 | |
827 | ##################### goto ####################### |
828 | |
829 | mode_goto: |
830 | btst.l #7,d6 |
831 | bne mode_goto_finish |
fbad1b76 |
832 | |
5f6473d9 |
833 | moveq.l #0,d5 |
834 | swap d6 |
835 | move.w d6,d5 |
836 | swap d6 |
837 | swap d5 |
838 | or.b #3,d5 /* 3 bytes */ |
4dfddc2f |
839 | bclr.l #7,d6 |
840 | change_mode MMODE_VAL_INPUT, MMODE_GOTO |
841 | jmp vbl_end |
842 | |
843 | mode_goto_finish: |
5f6473d9 |
844 | lsr.l #8,d5 |
845 | move.l d5,d0 |
4dfddc2f |
846 | move.l d0,d1 |
847 | and.l #7,d1 |
848 | and.b #0xf8,d0 |
849 | lsl.l #8,d0 |
850 | or.l d1,d0 |
851 | move.l d0,a6 |
852 | |
5f6473d9 |
853 | lsr.l #8,d5 |
854 | swap d6 |
855 | move.w d5,d6 |
856 | swap d6 |
857 | |
4dfddc2f |
858 | bra return_to_main |
859 | |
860 | ################### val edit ##################### |
861 | |
862 | mode_val_input: |
863 | /* frame */ |
864 | movea.l #0xe000+14*2+11*64*2,a1 |
865 | moveq.l #6-1,d1 |
866 | 0: |
867 | move.w a1,a0 |
868 | jsr load_prepare |
869 | moveq.l #11-1,d0 |
870 | 1: |
871 | move.w #0,(a0) |
872 | dbra d0,1b |
873 | |
874 | add.w #64*2,a1 |
875 | dbra d1,0b |
876 | |
877 | /* text */ |
878 | lea txt_edit,a0 |
879 | move.l #15,d0 |
880 | move.l #11,d1 |
881 | move.l #0xc000,d2 |
882 | jsr print |
883 | |
884 | lea txt_a_confirm,a0 |
885 | move.l #15,d0 |
886 | move.l #15,d1 |
887 | move.l #0xc000,d2 |
888 | jsr print |
889 | |
890 | /* edit field */ |
891 | moveq.l #0,d0 |
892 | moveq.l #0,d1 |
893 | moveq.l #0,d3 |
5f6473d9 |
894 | move.b d5,d3 |
895 | and.b #3,d3 /* edit field bytes */ |
4dfddc2f |
896 | |
897 | move.b #19,d0 |
898 | sub.b d3,d0 |
899 | move.b #13,d1 |
5f6473d9 |
900 | move.l d5,d2 |
4dfddc2f |
901 | lsr.l #8,d2 |
902 | add.b d3,d3 |
903 | or.w #0x8000,d3 |
904 | jsr print_hex |
905 | |
906 | /* current char */ |
907 | moveq.l #0,d0 |
908 | moveq.l #0,d1 |
909 | |
910 | and.w #6,d3 |
911 | move.b #19,d0 |
912 | move.b d3,d1 |
913 | lsr.b #1,d1 /* length in bytes */ |
914 | sub.b d1,d0 |
5f6473d9 |
915 | move.b d5,d1 |
916 | lsr.b #2,d1 |
4dfddc2f |
917 | and.b #7,d1 /* nibble to edit */ |
918 | add.b d1,d0 |
919 | |
920 | sub.b d1,d3 |
921 | sub.b #1,d3 /* chars to shift out */ |
922 | lsl.b #2,d3 |
923 | add.b #8,d3 |
5f6473d9 |
924 | move.l d5,d2 |
4dfddc2f |
925 | lsr.l d3,d2 |
926 | |
927 | move.b #13,d1 |
928 | move.w #0xa001,d3 |
929 | jsr print_hex |
930 | |
931 | /* handle input */ |
932 | jsr get_input /* x0cbrldu x1sa00du */ |
933 | |
934 | move.w d0,d1 |
935 | and.w #0x0f00,d1 |
936 | beq ai_no_dpad |
5f6473d9 |
937 | move.b d5,d1 |
938 | and.b #3,d1 |
4dfddc2f |
939 | add.b d1,d1 /* nibble count */ |
940 | sub.b #1,d1 /* max n.t.e. val */ |
5f6473d9 |
941 | move.b d5,d2 |
942 | lsr.b #2,d2 |
4dfddc2f |
943 | and.b #7,d2 /* nibble to edit */ |
944 | |
945 | move.b d0,d3 |
946 | and.b #3,d3 |
947 | beq ai_no_ud |
948 | moveq.l #0,d3 |
949 | moveq.l #0,d4 |
950 | move.b #0xf,d3 |
951 | move.b #0x1,d4 |
952 | sub.b d2,d1 |
953 | lsl.b #2,d1 |
954 | add.b #8,d1 |
955 | lsl.l d1,d3 /* mask */ |
956 | lsl.l d1,d4 /* what to add/sub */ |
5f6473d9 |
957 | move.l d5,d1 |
4dfddc2f |
958 | and.l d3,d1 |
959 | btst.l #8,d0 |
960 | beq 0f |
961 | add.l d4,d1 |
962 | bra 1f |
963 | 0: |
964 | sub.l d4,d1 |
965 | 1: |
966 | and.l d3,d1 |
967 | eor.l #0xffffffff,d3 |
5f6473d9 |
968 | and.l d3,d5 |
969 | or.l d1,d5 |
4dfddc2f |
970 | jmp vbl_end |
971 | |
972 | ai_no_ud: |
973 | btst.l #10,d0 |
974 | bne 0f |
975 | add.b #1,d2 |
976 | bra 1f |
977 | 0: |
978 | sub.b #1,d2 |
979 | 1: |
980 | cmp.b #0,d2 |
981 | bge 0f |
982 | move.b d1,d2 |
983 | 0: |
984 | cmp.b d1,d2 |
985 | ble 0f |
986 | move.b #0,d2 |
987 | 0: |
5f6473d9 |
988 | and.b #0xe3,d5 |
989 | lsl.b #2,d2 |
990 | or.b d2,d5 |
4dfddc2f |
991 | jmp vbl_end |
992 | |
993 | ai_no_dpad: |
994 | move.w d0,d1 |
995 | and.w #0x1020,d1 |
996 | beq ai_no_sb |
997 | |
4dfddc2f |
998 | bra return_to_main |
999 | |
1000 | ai_no_sb: |
5f6473d9 |
1001 | btst.l #4,d0 /* A - confirm */ |
4dfddc2f |
1002 | beq ai_no_input |
1003 | bset.l #7,d6 |
5f6473d9 |
1004 | move.w d7,d1 /* back to prev mode */ |
4dfddc2f |
1005 | and.w #0x3800,d1 |
1006 | lsr.w #3,d1 |
1007 | and.w #0xc0ff,d7 |
1008 | or.w d1,d7 |
1009 | |
1010 | ai_no_input: |
1011 | jmp vbl_end |
1012 | |
1013 | |
27d5cc88 |
1014 | ################### start menu ################### |
1015 | |
1016 | mode_start_menu: |
1017 | /* frame */ |
1018 | bsr start_menu_box |
1019 | |
1020 | /* text */ |
1021 | menu_text txt_about, 13, 9, 1 |
1022 | menu_text txt_goto, 13, 11, 0 |
1023 | menu_text txt_goto_predef, 13, 12, 0 |
d90ff128 |
1024 | menu_text txt_jmp_addr, 13, 13, 0 |
1025 | menu_text txt_dtack, 13, 14, 0 |
1026 | menu_text txt_a_confirm, 13, 16, 2 |
27d5cc88 |
1027 | |
1028 | /* dtack safety on/off */ |
d90ff128 |
1029 | movea.l #0xe000+26*2+14*64*2,a0 |
27d5cc88 |
1030 | jsr load_prepare |
1031 | move.w #0x8000|'O',(a0) |
1032 | btst.l #4,d6 |
1033 | bne 0f |
1034 | move.w #0x8000|'N',(a0) |
1035 | bra 1f |
1036 | 0: |
1037 | move.w #0x8000|'F',(a0) |
1038 | move.w #0x8000|'F',(a0) |
1039 | 1: |
1040 | |
1041 | /* cursor */ |
1042 | movea.l #0xe000+11*2+11*64*2,a0 |
1043 | moveq.l #0,d0 |
1044 | move.b d5,d0 |
1045 | and.b #3,d0 |
1046 | lsl.w #7,d0 |
1047 | add.w d0,a0 |
1048 | jsr load_prepare |
1049 | move.w #'>',(a0) |
1050 | |
1051 | /* input */ |
1052 | jsr get_input /* x0cbrldu x1sa00du */ |
1053 | |
1054 | move.w d0,d1 |
1055 | and.w #3,d1 |
1056 | beq msm_no_ud |
1057 | move.b d5,d1 |
1058 | and.b #3,d1 |
1059 | btst.l #0,d0 |
1060 | sne d2 |
1061 | or.b #1,d2 /* up -1, down 1 */ |
1062 | add.b d2,d1 |
1063 | cmp.b #0,d1 |
1064 | bge 0f |
d90ff128 |
1065 | move.b #3,d1 |
27d5cc88 |
1066 | 0: |
d90ff128 |
1067 | cmp.b #3,d1 |
27d5cc88 |
1068 | ble 0f |
1069 | move.b #0,d1 |
1070 | 0: |
1071 | and.b #0xfc,d5 |
1072 | or.b d1,d5 |
1073 | jmp vbl_end |
1074 | |
1075 | msm_no_ud: |
1076 | btst.l #4,d0 /* A - confirm */ |
1077 | beq msm_no_a |
1078 | move.b d5,d1 |
1079 | and.b #3,d1 |
1080 | bne 0f |
1081 | change_mode MMODE_GOTO, MMODE_MAIN |
1082 | bsr start_menu_box |
1083 | jmp vbl_end |
1084 | 0: |
1085 | cmp.b #1,d1 |
1086 | bne 0f |
1087 | moveq.l #0,d5 |
1088 | change_mode MMODE_GOTO_PREDEF, MMODE_MAIN |
1089 | bsr start_menu_box |
1090 | jmp vbl_end |
1091 | 0: |
1092 | cmp.b #2,d1 |
1093 | bne 0f |
d90ff128 |
1094 | change_mode MMODE_JMP_ADDR, MMODE_MAIN |
1095 | bsr start_menu_box |
1096 | jmp vbl_end |
1097 | 0: |
1098 | cmp.b #3,d1 |
1099 | bne 0f |
27d5cc88 |
1100 | bchg.l #4,d6 |
1101 | jmp vbl_end |
1102 | 0: |
1103 | |
1104 | msm_no_a: |
1105 | move.w d0,d1 |
1106 | and.w #0x3000,d1 |
1107 | beq msm_no_bc |
1108 | bra return_to_main |
1109 | |
1110 | msm_no_bc: |
1111 | jmp vbl_end |
1112 | |
1113 | start_menu_box: |
1114 | movea.l #0xe000+10*2+8*64*2,a1 |
d90ff128 |
1115 | move.w #10-1,d1 |
27d5cc88 |
1116 | 0: |
1117 | move.w a1,a0 |
1118 | jsr load_prepare |
1119 | move.w #20-1,d0 |
1120 | 1: |
1121 | move.w #0,(a0) |
1122 | dbra d0,1b |
1123 | |
1124 | add.w #64*2,a1 |
1125 | dbra d1,0b |
1126 | rts |
1127 | |
1128 | ################### goto predef ################## |
1129 | |
1130 | mode_goto_predef: |
1131 | /* frame */ |
1132 | movea.l #0xe000+14*2+8*64*2,a1 |
1133 | move.l #predef_addr_cnt+2-1,d1 |
1134 | 0: |
1135 | move.w a1,a0 |
1136 | jsr load_prepare |
1137 | moveq.l #10-1,d0 |
1138 | 1: |
1139 | move.w #0,(a0) |
1140 | dbra d0,1b |
1141 | |
1142 | add.w #64*2,a1 |
1143 | dbra d1,0b |
1144 | |
1145 | /* draw addresses */ |
1146 | movea.l #0xe000+17*2+9*64*2,a1 |
1147 | lea predef_addrs,a2 |
1148 | move.w #predef_addr_cnt-1,d4 |
1149 | move.l #0x8006,d3 |
1150 | mgp_da_loop: |
1151 | move.w a1,a0 |
1152 | jsr load_prepare |
1153 | move.l (a2)+,d2 |
1154 | jsr print_hex_preped |
1155 | add.w #64*2,a1 |
1156 | dbra d4,mgp_da_loop |
1157 | |
1158 | /* cursor */ |
1159 | movea.l #0xe000+15*2+9*64*2,a0 |
1160 | moveq.l #0,d0 |
1161 | move.b d5,d0 |
1162 | lsl.w #7,d0 |
1163 | add.w d0,a0 |
1164 | jsr load_prepare |
1165 | move.w #'>',(a0) |
1166 | |
1167 | /* input */ |
1168 | jsr get_input /* x0cbrldu x1sa00du */ |
1169 | |
1170 | move.w d0,d1 |
1171 | and.w #3,d1 |
1172 | beq mgp_no_ud |
1173 | btst.l #0,d0 |
1174 | sne d2 |
1175 | or.b #1,d2 /* up -1, down 1 */ |
1176 | add.b d2,d5 |
1177 | cmp.b #0,d5 |
1178 | bge 0f |
1179 | move.b #predef_addr_cnt-1,d5 |
1180 | 0: |
1181 | cmp.b #predef_addr_cnt-1,d5 |
1182 | ble 0f |
1183 | move.b #0,d5 |
1184 | 0: |
1185 | jmp vbl_end |
1186 | |
1187 | mgp_no_ud: |
1188 | btst.l #4,d0 /* A - confirm */ |
1189 | beq mgp_no_a |
1190 | moveq.l #0,d0 |
1191 | move.b d5,d0 |
1192 | lsl.w #2,d0 |
1193 | lea predef_addrs,a0 |
1194 | move.l (a0,d0),d5 |
1195 | lsl.l #8,d5 |
1196 | jmp mode_goto_finish |
1197 | |
1198 | mgp_no_a: |
1199 | move.w d0,d1 |
1200 | and.w #0x3000,d1 |
1201 | beq mgp_no_bc |
1202 | bra return_to_main |
1203 | |
1204 | mgp_no_bc: |
1205 | jmp vbl_end |
1206 | |
d90ff128 |
1207 | ##################### jmp ######################## |
1208 | |
1209 | mode_jmp_addr: |
1210 | btst.l #7,d6 |
1211 | bne mode_jmp_finish |
1212 | |
1213 | moveq.l #0,d5 |
1214 | or.b #3,d5 /* 3 bytes */ |
1215 | bclr.l #7,d6 |
1216 | change_mode MMODE_VAL_INPUT, MMODE_JMP_ADDR |
1217 | jmp vbl_end |
1218 | |
1219 | mode_jmp_finish: |
1220 | lsr.l #8,d5 |
1221 | write_vdp_r_dst 1,(VDP1_E_DISPLAY | VDP1_MODE5),(GFXCNTL) /* disable vint */ |
1222 | move.l d5,a0 |
1223 | jmp (a0) |
1224 | |
27d5cc88 |
1225 | |
4dfddc2f |
1226 | # go back to main mode |
1227 | return_to_main: |
5f6473d9 |
1228 | bclr.l #7,d6 /* not edited */ |
4dfddc2f |
1229 | change_mode MMODE_MAIN, MMODE_MAIN |
27d5cc88 |
1230 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320),(GFXCNTL) |
fbad1b76 |
1231 | jmp vbl_end |
1232 | |
1233 | |
4db6e09f |
1234 | ################################################# |
1235 | # # |
1236 | # Initialize VDP registers # |
1237 | # # |
1238 | ################################################# |
1239 | |
1240 | init_gfx: |
1241 | move.l #GFXCNTL,a3 |
570c4371 |
1242 | write_vdp_reg 0,(VDP0_E_DISPLAY | VDP0_PLTT_FULL) |
d90ff128 |
1243 | write_vdp_reg 1,(VDP1_E_VBI | VDP1_E_DISPLAY | VDP1_MODE5) |
4db6e09f |
1244 | write_vdp_reg 2,(0xe000 >> 10) /* Screen map a adress */ |
1245 | write_vdp_reg 3,(0xe000 >> 10) /* Window address */ |
1246 | write_vdp_reg 4,(0xc000 >> 13) /* Screen map b address */ |
1247 | write_vdp_reg 5,(0xfc00 >> 9) /* Sprite address */ |
1248 | write_vdp_reg 6,0 |
570c4371 |
1249 | write_vdp_reg 7,0 /* Backdrop color */ |
4db6e09f |
1250 | write_vdp_reg 10,1 /* Lines per hblank interrupt */ |
1251 | write_vdp_reg 11,0 /* 2-cell vertical scrolling */ |
570c4371 |
1252 | write_vdp_reg 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320) |
1253 | write_vdp_reg 13,(0x8000 >> 10) /* Horizontal scroll address */ |
4db6e09f |
1254 | write_vdp_reg 15,2 |
570c4371 |
1255 | write_vdp_reg 16,(VDP16_MAP_V32 | VDP16_MAP_H64) /* layer size */ |
4db6e09f |
1256 | write_vdp_reg 17,0 |
1257 | write_vdp_reg 18,0xff |
1258 | rts |
1259 | |
1260 | |
d4279640 |
1261 | # get mask of bits representing safe words |
27d5cc88 |
1262 | # a1 - address to check |
1263 | # destroys d0-d2, strips upper bits from a1 |
d4279640 |
1264 | get_safety_mask: |
27d5cc88 |
1265 | move.l a1,d1 |
1266 | lsl.l #8,d1 |
1267 | lsr.l #8,d1 |
1268 | lea safe_addrs,a1 |
1269 | move.w #(safe_addrs_end - safe_addrs)/8-1,d2 |
1270 | 0: |
1271 | move.l (a1)+,d0 |
1272 | cmp.l d0,d1 |
1273 | blt 1f |
1274 | move.l (a1),d0 |
1275 | cmp.l d0,d1 |
1276 | ble addr_safe |
1277 | 1: |
1278 | addq.l #4,a1 |
1279 | dbra d2,0b |
1280 | |
27d5cc88 |
1281 | move.l d1,a1 |
d4279640 |
1282 | |
1283 | moveq.l #0x0c,d0 |
1284 | cmp.l #0xa14000,d1 |
1285 | beq gsm_rts |
1286 | |
1287 | moveq.l #0x08,d0 |
1288 | cmp.l #0xa14100,d1 |
1289 | beq gsm_rts |
1290 | |
1291 | /* check for VDP address */ |
1292 | move.l d1,d0 |
1293 | swap d0 |
1294 | and.b #0xe0,d0 |
1295 | cmp.b #0xc0,d0 |
1296 | bne addr_unsafe /* not vdp */ |
1297 | |
1298 | move.l d1,d0 |
1299 | and.l #0x0700e0,d0 |
1300 | bne addr_unsafe |
1301 | |
1302 | move.l d1,d0 |
1303 | and.b #0x1f,d0 |
1304 | cmp.b #0x04,d0 |
1305 | blt addr_hsafe_3 /* data port */ |
1306 | cmp.b #0x10,d0 |
1307 | blt addr_safe /* below PSG */ |
1308 | cmp.b #0x18,d0 |
1309 | bge addr_safe /* above PSG */ |
1310 | |
1311 | addr_unsafe: |
1312 | moveq.l #0,d0 /* skip line */ |
1313 | rts |
1314 | |
1315 | addr_hsafe_3: |
1316 | moveq.l #3,d0 /* skip 2 words */ |
27d5cc88 |
1317 | rts |
1318 | |
1319 | addr_safe: |
1320 | move.l d1,a1 |
d4279640 |
1321 | moveq.l #0xf,d0 |
1322 | gsm_rts: |
27d5cc88 |
1323 | rts |
1324 | |
1325 | |
1286a1ba |
1326 | # read single phase from controller |
fbad1b76 |
1327 | # #a0 - addr |
1286a1ba |
1328 | # d0 - result |
fbad1b76 |
1329 | # destroys d1,d2 |
1286a1ba |
1330 | get_input: |
1331 | move.b #0x40,(0xa10003) |
1332 | nop |
1333 | nop |
1334 | nop |
1335 | move.b (0xa10003),d0 |
1336 | move.b #0x00,(0xa10003) |
1337 | lsl.w #8,d0 |
1338 | nop |
1339 | move.b (0xa10003),d0 |
1340 | eor.w #0xffff,d0 |
fbad1b76 |
1341 | |
1342 | swap d7 |
1343 | move.w d7,d1 |
1344 | eor.w d0,d1 /* changed btns */ |
1345 | move.w d0,d7 /* old val */ |
1346 | swap d7 |
1347 | and.w d0,d1 /* what changed now */ |
1348 | bne 0f |
1349 | |
1350 | addq.b #1,d6 |
1351 | move.b d6,d2 |
27d5cc88 |
1352 | and.b #0x0f,d2 /* do autorepeat */ |
1353 | cmp.b #9,d2 |
fbad1b76 |
1354 | bne 1f |
1355 | move.w d0,d1 |
1356 | 0: |
27d5cc88 |
1357 | and.b #0xf0,d6 |
fbad1b76 |
1358 | 1: |
1359 | swap d0 |
1360 | move.w d1,d0 |
1286a1ba |
1361 | rts |
1362 | |
4dfddc2f |
1363 | # Prepare to write to VDP RAM @a0 |
0fc4f06b |
1364 | # sets a0 to VDP data port for convenience |
1365 | # a0: VRAM base |
1366 | # destroys d0 |
570c4371 |
1367 | |
4db6e09f |
1368 | load_prepare: |
0fc4f06b |
1369 | VRAM_ADDR_var a0 |
1370 | move.l d0,(GFXCNTL).l |
1371 | move.l #GFXDATA,a0 |
4db6e09f |
1372 | rts |
1373 | |
1374 | |
0fc4f06b |
1375 | # Load color data from ROM |
1376 | # a0: CRAM base |
1377 | # a1: color list address |
1378 | # d0: number of colors to load |
1379 | # destroys d1 |
4db6e09f |
1380 | |
1381 | load_colors: |
0fc4f06b |
1382 | move.l d0,d1 |
1383 | CRAM_ADDR_var a0 |
1384 | move.l d0,(GFXCNTL).l |
4db6e09f |
1385 | |
0fc4f06b |
1386 | move.l #GFXDATA,a0 |
1387 | subq.w #1,d1 |
1388 | 0: |
1389 | move.w (a1)+,(a0) |
1390 | dbra d1,0b |
4db6e09f |
1391 | |
1392 | rts |
1393 | |
0fc4f06b |
1394 | |
1395 | # print |
1396 | # a0 - string |
1397 | # d0 - x |
1398 | # d1 - y |
4dfddc2f |
1399 | # d2 - tile_bits[15:11] |
0fc4f06b |
1400 | # destroys a1 |
570c4371 |
1401 | |
1402 | print: |
0fc4f06b |
1403 | move.l a0,a1 |
1286a1ba |
1404 | XY2NT |
0fc4f06b |
1405 | jsr load_prepare |
4dfddc2f |
1406 | move.l d2,d0 |
1407 | and.w #0xf800,d0 |
570c4371 |
1408 | |
1409 | _print_loop: |
0fc4f06b |
1410 | move.b (a1)+,d0 |
570c4371 |
1411 | beq _print_end |
1412 | |
0fc4f06b |
1413 | move.w d0,(a0) |
570c4371 |
1414 | jmp _print_loop |
1415 | |
1416 | _print_end: |
1417 | rts |
1418 | |
4db6e09f |
1419 | |
1286a1ba |
1420 | # print_hex |
1421 | # d0 - x |
1422 | # d1 - y |
1423 | # d2 - value |
27d5cc88 |
1424 | # d3 - tile_bits[15:11]|digit_cnt[7:0] |
4276cd7a |
1425 | # destroys a0, preserves d3 |
1286a1ba |
1426 | |
1427 | print_hex: |
1428 | XY2NT |
1429 | jsr load_prepare |
1430 | |
1431 | print_hex_preped: |
4276cd7a |
1432 | moveq.l #0,d0 |
1433 | move.b d3,d0 |
1434 | move.l d0,d1 |
1286a1ba |
1435 | lsl.b #2,d0 |
1436 | ror.l d0,d2 /* prep value */ |
4276cd7a |
1437 | subq.l #1,d1 /* count */ |
1438 | move.w d3,d0 |
1439 | and.w #0xf800,d0 /* keep upper bits in d0 */ |
1286a1ba |
1440 | |
1441 | _print_hex_loop: |
1442 | rol.l #4,d2 |
1443 | move.b d2,d0 |
1444 | and.b #0xf,d0 |
1286a1ba |
1445 | |
1446 | add.b #'0',d0 |
4276cd7a |
1447 | cmp.b #'9',d0 |
1448 | ble 0f |
1449 | addq.b #7,d0 |
1450 | 0: |
1286a1ba |
1451 | move.w d0,(a0) |
4276cd7a |
1452 | dbra d1,_print_hex_loop |
1286a1ba |
1453 | |
1454 | rts |
1455 | |
1456 | |
d90ff128 |
1457 | # wait vertical sync |
4db6e09f |
1458 | |
1459 | wait_vsync: |
fbad1b76 |
1460 | move.b d7,d0 |
4db6e09f |
1461 | _wait_change: |
1462 | stop #0x2000 |
fbad1b76 |
1463 | cmp.b d7,d0 |
4db6e09f |
1464 | beq _wait_change |
1465 | rts |
1466 | |
1467 | |
1468 | ################################################# |
1469 | # # |
1470 | # RAM DATA # |
1471 | # # |
1472 | ################################################# |
1473 | |
1474 | .bss |
570c4371 |
1475 | |
fbad1b76 |
1476 | # nothing :) |
4db6e09f |
1477 | |
1478 | .end |
1479 | |
1480 | # vim:filetype=asmM68k |