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 | |
318e20ff |
32 | .equ USE_VINT, 1 |
33 | .equ RELOCATE_TO_RAM, 0 |
34 | |
4db6e09f |
35 | .text |
36 | .globl main |
d4279640 |
37 | .globl INT |
1286a1ba |
38 | .globl VBL |
4db6e09f |
39 | |
40 | ################################################## |
41 | # # |
42 | # Register and bitmask definitions # |
43 | # # |
44 | ################################################## |
45 | |
46 | .equ GFXDATA, 0xc00000 |
47 | .equ GFXCNTL, 0xc00004 |
48 | |
49 | .equ VDP0_E_HBI, 0x10 |
50 | .equ VDP0_E_DISPLAY, 0x02 |
51 | .equ VDP0_PLTT_FULL, 0x04 |
52 | |
53 | .equ VDP1_SMS_MODE, 0x80 |
54 | .equ VDP1_E_DISPLAY, 0x40 |
55 | .equ VDP1_E_VBI, 0x20 |
56 | .equ VDP1_E_DMA, 0x10 |
57 | .equ VDP1_NTSC, 0x00 |
58 | .equ VDP1_PAL, 0x08 |
d90ff128 |
59 | .equ VDP1_MODE5, 0x04 |
4db6e09f |
60 | |
fbad1b76 |
61 | .equ VDP12_STE, 0x08 |
4db6e09f |
62 | .equ VDP12_SCREEN_V224, 0x00 |
63 | .equ VDP12_SCREEN_V448, 0x04 |
64 | .equ VDP12_PROGRESSIVE, 0x00 |
65 | .equ VDP12_INTERLACED, 0x02 |
66 | .equ VDP12_SCREEN_H256, 0x00 |
67 | .equ VDP12_SCREEN_H320, 0x81 |
68 | |
69 | .equ VDP16_MAP_V32, 0x00 |
70 | .equ VDP16_MAP_V64, 0x10 |
71 | .equ VDP16_MAP_V128, 0x30 |
72 | .equ VDP16_MAP_H32, 0x00 |
73 | .equ VDP16_MAP_H64, 0x01 |
74 | .equ VDP16_MAP_H128, 0x03 |
75 | |
4dfddc2f |
76 | .equ MMODE_MAIN, 0 |
77 | .equ MMODE_VAL_INPUT, 1 |
78 | .equ MMODE_EDIT_VAL, 2 |
79 | .equ MMODE_GOTO, 3 |
27d5cc88 |
80 | .equ MMODE_START_MENU, 4 |
81 | .equ MMODE_GOTO_PREDEF, 5 |
d90ff128 |
82 | .equ MMODE_JMP_ADDR, 6 |
80560599 |
83 | .equ MMODE_DUMP, 7 |
4db6e09f |
84 | |
27d5cc88 |
85 | .equ predef_addr_cnt, ((predef_addrs_end-predef_addrs)/4) |
4db6e09f |
86 | |
87 | ################################################## |
88 | # # |
89 | # MACROS # |
90 | # # |
91 | ################################################## |
92 | |
93 | |
27d5cc88 |
94 | # Write val to VDP register reg |
95 | .macro write_vdp_r_dst reg val dst |
96 | move.w #((\reg << 8) + 0x8000 + \val),\dst |
4db6e09f |
97 | .endm |
98 | |
27d5cc88 |
99 | # Write val to VDP register reg, vdp addr in a3 |
100 | .macro write_vdp_reg reg val |
101 | write_vdp_r_dst \reg, \val, (a3) |
102 | .endm |
4db6e09f |
103 | |
d90ff128 |
104 | # Set up address in VDP, control port in dst |
105 | .macro VRAM_ADDR adr dst |
80560599 |
106 | move.l #(0x40000000 | ((\adr & 0x3fff) << 16) | (\adr >> 14)),\dst |
107 | .endm |
108 | |
109 | .macro VSRAM_ADDR adr dst |
110 | move.l #(0x40000010 | ((\adr & 0x3fff) << 16) | (\adr >> 14)),\dst |
0fc4f06b |
111 | .endm |
112 | |
113 | |
114 | # make VDP word from address adr and store in d0 |
115 | .macro XRAM_ADDR_var adr |
570c4371 |
116 | move.l \adr,d0 |
0fc4f06b |
117 | lsl.l #8,d0 |
118 | lsl.l #8,d0 |
119 | rol.l #2,d0 |
120 | lsl.b #2,d0 |
121 | lsr.l #2,d0 |
4db6e09f |
122 | .endm |
123 | |
124 | |
0fc4f06b |
125 | .macro VRAM_ADDR_var adr |
126 | XRAM_ADDR_var \adr |
127 | or.l #0x40000000,d0 |
4db6e09f |
128 | .endm |
129 | |
130 | |
0fc4f06b |
131 | .macro CRAM_ADDR_var adr |
132 | XRAM_ADDR_var \adr |
133 | or.l #0xc0000000,d0 |
4db6e09f |
134 | .endm |
135 | |
136 | |
1286a1ba |
137 | # convert tile coords in d0, d1 to nametable addr to a0 |
138 | .macro XY2NT |
139 | lsl.w #6,d1 |
140 | add.w d1,d0 |
141 | lsl.w #1,d0 |
142 | movea.l #0xe000,a0 |
143 | add.w d0,a0 |
144 | .endm |
145 | |
4276cd7a |
146 | # check if some d-pad button (and modifier) is pressed |
fbad1b76 |
147 | .macro do_dpad bit op val |
148 | btst.l #\bit,d0 |
149 | beq 0f |
150 | \op.l \val,a6 |
151 | bra dpad_end |
4276cd7a |
152 | 0: |
4276cd7a |
153 | .endm |
154 | |
4dfddc2f |
155 | # convert a6 to normal addr |
156 | # destroys d0 |
157 | .macro mk_a6_addr reg |
158 | move.l a6,\reg |
159 | moveq.l #0,d0 |
160 | move.b \reg,d0 |
161 | lsr.l #8,\reg |
162 | add.l d0,\reg |
163 | .endm |
164 | |
165 | .macro change_mode mode_new mode_back |
166 | and.w #0xc0ff,d7 |
167 | or.w #(\mode_back<<11)|(\mode_new<<8),d7 |
168 | .endm |
169 | |
80560599 |
170 | # destroys a0,d0-d2 |
27d5cc88 |
171 | .macro menu_text str x y pal |
318e20ff |
172 | lea (\str,pc),a0 |
27d5cc88 |
173 | move.l #\x,d0 |
174 | move.l #\y,d1 |
175 | move.l #0x8000|(\pal<<13),d2 |
176 | jsr print |
177 | .endm |
178 | |
4db6e09f |
179 | ################################################# |
180 | # # |
181 | # DATA # |
182 | # # |
183 | ################################################# |
184 | |
185 | colors: |
4276cd7a |
186 | dc.w 0x0000,0x0eee,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
187 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
188 | dc.w 0x0000,0x02e2,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
189 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
190 | dc.w 0x0000,0x0e44,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
191 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
d4279640 |
192 | dc.w 0x0000,0x044e,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
193 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
570c4371 |
194 | colors_end: |
195 | |
4db6e09f |
196 | |
197 | sprite_data: |
198 | /* Y size link attr X */ |
570c4371 |
199 | dc.w 0; dc.b 0x05; dc.b 0; dc.w 0x6002; dc.w 0 |
4db6e09f |
200 | sprite_data_end: |
201 | |
27d5cc88 |
202 | predef_addrs: |
203 | dc.l 0x000000, 0x200000, 0x400000, 0xa00000, 0xa10000 |
d4279640 |
204 | dc.l 0xa11100, 0xa12000, 0xa13000, 0xa14000, 0xc00000 |
27d5cc88 |
205 | predef_addrs_end: |
206 | |
207 | safe_addrs: |
208 | dc.l 0x000000, 0x7fffff |
209 | dc.l 0xe00000, 0xffffff |
d4279640 |
210 | dc.l 0xa00000, 0xa100ff |
211 | dc.l 0xa11000, 0xa113ff |
212 | dc.l 0xa12000, 0xa120ff |
213 | dc.l 0xa13000, 0xa130ff |
27d5cc88 |
214 | safe_addrs_end: |
215 | |
80560599 |
216 | transfer_mode: |
217 | dc.l 0x000000 /* 1 for recv */ |
218 | transfer_addr: |
219 | dc.l 0x000000 |
220 | transfer_len: |
221 | dc.l 0x000800 |
222 | |
4dfddc2f |
223 | txt_edit: |
224 | .ascii "- edit -\0" |
225 | txt_a_confirm: |
226 | .ascii "A-confirm\0" |
27d5cc88 |
227 | txt_about: |
318e20ff |
228 | .ascii "hexed r2\0" |
27d5cc88 |
229 | txt_goto: |
230 | .ascii "Go to address\0" |
231 | txt_goto_predef: |
232 | .ascii "Go to (predef)\0" |
d90ff128 |
233 | txt_jmp_addr: |
234 | .ascii "Jump to address\0" |
80560599 |
235 | txt_dump: |
236 | .ascii "Transfer\0" |
27d5cc88 |
237 | txt_dtack: |
238 | .ascii "DTACK safety\0" |
80560599 |
239 | txt_ready_send: |
240 | .ascii "Ready to send\0" |
241 | txt_ready_recv: |
242 | .ascii "Ready to recv\0" |
243 | txt_working: |
244 | .ascii "Working.. \0" |
d4279640 |
245 | txt_dtack_err: |
246 | .ascii "DTACK err?\0" |
247 | txt_exc: |
248 | .ascii "Exception \0" |
4dfddc2f |
249 | |
4db6e09f |
250 | ################################################## |
251 | # # |
252 | # MAIN PROGRAM # |
253 | # # |
254 | ################################################## |
27d5cc88 |
255 | |
256 | # global regs: |
257 | # a6 = page_start[31:8]|cursor_offs[7:0] |
258 | # d7 = old_inputs[31:16]|edit_bytes[15:14]|g_mode_old[13:11]|g_mode[10:8]|irq_cnt[7:0] |
259 | # d6 = edit_word_save[31:15]|edit_done[7]|no_dtack_detect[4]|autorep_cnt[3:0] |
260 | # d5 = main: tmp |
261 | # edit: edit_word[31:8]|edit_pos[4:2]|byte_cnt[1:0] |
262 | # menu: sel |
263 | |
570c4371 |
264 | .align 2 |
265 | |
4db6e09f |
266 | main: |
4276cd7a |
267 | /* mask irqs during init */ |
1286a1ba |
268 | move.w #0x2700,sr |
269 | |
80560599 |
270 | .if 0 |
271 | /* copy to expansion device if magic number is set */ |
272 | move.l #0x400000,a1 |
273 | cmp.w #0x1234,(a1) |
27d5cc88 |
274 | bne 0f |
275 | |
80560599 |
276 | move.l #0,a0 |
318e20ff |
277 | move.w #0x2000/8-1,d0 |
80560599 |
278 | 1: |
279 | move.l (a0)+,(a1)+ |
280 | move.l (a0)+,(a1)+ |
281 | dbra d0,1b |
282 | 0: |
283 | .endif |
284 | |
285 | .if RELOCATE_TO_RAM |
286 | /* copy, assume 8K size */ |
27d5cc88 |
287 | move.l #0,a0 |
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 | |
318e20ff |
295 | lea (0f,pc),a0 |
296 | add.l #0xFF0100,a0 |
297 | jmp (a0) |
27d5cc88 |
298 | 0: |
299 | .endif |
300 | |
1286a1ba |
301 | movea.l #0,a6 |
4dfddc2f |
302 | move.l #0x8000,d7 |
fbad1b76 |
303 | moveq.l #0,d6 |
1286a1ba |
304 | |
305 | /* Init pads */ |
306 | move.b #0x40,(0xa10009).l |
307 | move.b #0x40,(0xa10003).l |
308 | |
4db6e09f |
309 | /* Initialize VDP */ |
310 | jsr init_gfx |
311 | |
80560599 |
312 | /* Clear h/v scroll */ |
313 | movea.l #GFXDATA,a0 |
314 | VRAM_ADDR 0x8000,(GFXCNTL) |
315 | move.l #0,(a0) |
316 | VSRAM_ADDR 0,(GFXCNTL) |
317 | move.l #0,(a0) |
318 | |
4db6e09f |
319 | /* Load color data */ |
0fc4f06b |
320 | movea.l #0,a0 |
318e20ff |
321 | lea (colors,pc),a1 |
0fc4f06b |
322 | moveq.l #(colors_end-colors)/2,d0 |
4db6e09f |
323 | jsr load_colors |
324 | |
d90ff128 |
325 | /* load font patterns */ |
318e20ff |
326 | movea.l #GFXDATA,a0 |
327 | lea (font,pc),a1 |
d90ff128 |
328 | VRAM_ADDR 0,(GFXCNTL) |
329 | move.w #128*8,d3 |
330 | font_loop: |
331 | moveq.l #8-1,d2 |
332 | moveq.l #0,d1 |
333 | move.b (a1)+,d0 |
334 | 0: |
335 | lsr.b #1,d0 |
336 | roxl.l #1,d1 |
337 | ror.l #5,d1 |
338 | dbra d2,0b |
339 | |
340 | rol.l #1,d1 /* fixup */ |
341 | move.l d1,(a0) |
342 | dbra d3,font_loop |
4db6e09f |
343 | |
344 | /* generate A layer map */ |
1286a1ba |
345 | movea.l #0xe000,a1 |
4db6e09f |
346 | move.l #28-1,d4 |
347 | lmaploop0: |
1286a1ba |
348 | movea.l a1,a0 |
4db6e09f |
349 | jsr load_prepare |
350 | |
570c4371 |
351 | move.l #64/2-1,d3 |
0fc4f06b |
352 | 0: move.l #0x00000000,(a0) |
4db6e09f |
353 | dbra d3,0b |
354 | |
1286a1ba |
355 | add.l #64*2,a1 |
4db6e09f |
356 | dbra d4,lmaploop0 |
357 | |
358 | /* generate B layer map */ |
0fc4f06b |
359 | movea.l #0xc000,a0 |
4db6e09f |
360 | jsr load_prepare |
361 | |
570c4371 |
362 | move.l #64*28/2-1,d3 |
0fc4f06b |
363 | 0: move.l #0x00000000,(a0) |
4db6e09f |
364 | dbra d3,0b |
365 | |
366 | /* upload sprite data */ |
0fc4f06b |
367 | movea.l #0xfc00,a0 |
4db6e09f |
368 | jsr load_prepare |
318e20ff |
369 | lea (sprite_data,pc),a1 |
4db6e09f |
370 | |
371 | move.l #(sprite_data_end-sprite_data)/2-1,d3 |
0fc4f06b |
372 | 0: move.l (a1)+,(a0) |
4db6e09f |
373 | dbra d3,0b |
374 | |
318e20ff |
375 | .if USE_VINT |
d4279640 |
376 | /* wait for vsync before unmask */ |
318e20ff |
377 | jsr wait_vsync_poll |
d4279640 |
378 | |
74d5977b |
379 | /* wait a bit to avoid nested vint */ |
380 | move.w #20,d0 |
381 | 0: |
382 | dbra d0,0b /* 10 cycles to go back */ |
383 | |
318e20ff |
384 | /* enable and unmask vint */ |
385 | write_vdp_r_dst 1,(VDP1_E_VBI | VDP1_E_DISPLAY | VDP1_MODE5),(GFXCNTL) |
74d5977b |
386 | move.w #0x2000,sr |
318e20ff |
387 | .endif |
570c4371 |
388 | |
4db6e09f |
389 | ################################################## |
1286a1ba |
390 | |
4db6e09f |
391 | forever: |
318e20ff |
392 | .if USE_VINT |
4db6e09f |
393 | jsr wait_vsync |
318e20ff |
394 | .else |
395 | jsr wait_vsync_poll |
396 | jsr VBL |
397 | .endif |
4db6e09f |
398 | bra forever |
4db6e09f |
399 | |
400 | |
d4279640 |
401 | INT: |
402 | /* let's hope VRAM is already set up.. */ |
318e20ff |
403 | lea (txt_exc,pc),a0 |
d4279640 |
404 | move.l #9,d0 |
405 | move.l #27,d1 |
406 | move.l #0xe000,d2 |
407 | jsr print |
408 | bra forever |
409 | |
410 | ################################################## |
411 | |
1286a1ba |
412 | VBL: |
fbad1b76 |
413 | addq.b #1,d7 |
d90ff128 |
414 | # movem.l d0-d4/a0-a5,-(a7) |
1286a1ba |
415 | |
fbad1b76 |
416 | moveq.l #0,d0 |
417 | move.w d7,d0 |
418 | lsr.w #6,d0 |
419 | and.w #0x1c,d0 |
318e20ff |
420 | lea (jumptab,pc,d0),a0 |
fbad1b76 |
421 | jmp (a0) |
422 | jumptab: |
318e20ff |
423 | bra mode_main |
424 | bra mode_val_input |
425 | bra mode_edit_val /* edit val in editor */ |
426 | bra mode_goto |
427 | bra mode_start_menu |
428 | bra mode_goto_predef |
429 | bra mode_jmp_addr |
80560599 |
430 | bra mode_transfer |
fbad1b76 |
431 | |
432 | ##################### main ####################### |
433 | |
434 | mode_main: |
d4279640 |
435 | /* assume we will hang */ |
318e20ff |
436 | lea (txt_dtack_err,pc),a0 |
d4279640 |
437 | move.l #9,d0 |
438 | move.l #27,d1 |
439 | move.l #0xe000,d2 |
440 | jsr print |
441 | |
442 | moveq.l #0,d1 |
1286a1ba |
443 | move.l a6,d0 |
4276cd7a |
444 | move.b d0,d1 |
1286a1ba |
445 | lsr.l #8,d0 |
446 | move.l d0,a1 /* current addr */ |
4276cd7a |
447 | lsr.b #3,d1 |
448 | neg.b d1 |
449 | add.b #27-1,d1 /* line where the cursor sits */ |
450 | swap d1 |
1286a1ba |
451 | |
27d5cc88 |
452 | movea.l #0xe002,a2 |
4276cd7a |
453 | move.l #27-1,d5 /* line counter for dbra */ |
454 | or.l d1,d5 |
1286a1ba |
455 | |
27d5cc88 |
456 | draw_row: |
1286a1ba |
457 | move.l a2,a0 |
458 | jsr load_prepare |
459 | |
27d5cc88 |
460 | btst.l #15,d7 |
461 | beq 0f |
462 | move.w #' ',(a0) |
463 | 0: |
1286a1ba |
464 | /* addr */ |
465 | move.l a1,d2 |
466 | moveq.l #6,d3 |
467 | jsr print_hex_preped |
468 | |
27d5cc88 |
469 | btst.l #4,d6 |
470 | bne draw_row_safe |
471 | |
d4279640 |
472 | bsr get_safety_mask |
473 | cmp.b #0xf,d0 |
474 | beq draw_row_safe |
27d5cc88 |
475 | |
d4279640 |
476 | # unsafe or partially safe |
477 | draw_row_hsafe: |
478 | move.l d0,d4 |
479 | swap d4 /* mask in upper word */ |
27d5cc88 |
480 | btst.l #15,d7 |
d4279640 |
481 | bne draw_row_hsafe_words_pre |
27d5cc88 |
482 | |
d4279640 |
483 | draw_row_hsafe_bytes_pre: |
27d5cc88 |
484 | /* 8 bytes */ |
d4279640 |
485 | moveq.l #2,d3 |
486 | move.w #3,d4 |
487 | |
488 | draw_row_hsafe_bytes: |
27d5cc88 |
489 | move.w #' ',(a0) |
d4279640 |
490 | move.b d4,d0 |
491 | add.b #16,d0 |
492 | btst.l d0,d4 |
493 | bne 0f |
27d5cc88 |
494 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
495 | move.w #' ',(a0) |
496 | move.l #'?'|('?'<<16),(a0) |
497 | bra 1f |
498 | 0: |
499 | move.b (0,a1),d2 |
500 | jsr print_hex_preped |
501 | move.w #' ',(a0) |
502 | move.b (1,a1),d2 |
503 | jsr print_hex_preped |
504 | 1: |
505 | addq.l #2,a1 |
506 | dbra d4,draw_row_hsafe_bytes |
27d5cc88 |
507 | |
508 | move.w #' ',(a0) |
509 | |
510 | move.l d5,d0 |
511 | swap d0 |
512 | cmp.w d5,d0 |
513 | beq draw_cursor_unsafe_byte |
d4279640 |
514 | bra draw_chars_hsafe_pre |
27d5cc88 |
515 | |
d4279640 |
516 | draw_row_hsafe_words_pre: |
27d5cc88 |
517 | /* 4 shorts */ |
d4279640 |
518 | moveq.l #4,d3 |
519 | move.w #3,d4 |
520 | |
521 | draw_row_hsafe_words: |
27d5cc88 |
522 | move.w #' ',(a0) |
d4279640 |
523 | move.b d4,d0 |
524 | add.b #16,d0 |
525 | btst.l d0,d4 |
526 | bne 0f |
27d5cc88 |
527 | move.l #'?'|('?'<<16),(a0) |
528 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
529 | bra 1f |
530 | 0: |
531 | move.w (a1),d2 |
532 | jsr print_hex_preped |
533 | 1: |
534 | addq.l #2,a1 |
535 | dbra d4,draw_row_hsafe_words |
27d5cc88 |
536 | |
537 | move.l #(' '<<16)|' ',(a0) |
538 | |
539 | move.l d5,d0 |
540 | swap d0 |
541 | cmp.w d5,d0 |
542 | beq draw_cursor_unsafe_word |
543 | |
d4279640 |
544 | draw_chars_hsafe_pre: |
545 | subq.l #8,a1 |
546 | move.w #3,d4 |
547 | moveq.l #0,d0 |
548 | |
549 | draw_chars_hsafe: |
550 | move.b d4,d0 |
551 | add.b #16,d0 |
552 | btst.l d0,d4 |
553 | bne 0f |
27d5cc88 |
554 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
555 | bra draw_chars_hsafe_next |
556 | 0: |
557 | btst.l #15,d7 /* must perform correct read type */ |
558 | bne 0f /* doing byte reads on security reg hangs */ |
559 | move.b (0,a1),d0 |
560 | lsl.l #8,d0 |
561 | move.b (1,a1),d0 |
562 | bra 1f |
563 | 0: |
564 | move.w (a1),d0 |
565 | 1: |
566 | ror.l #8,d0 |
567 | move.b d0,d1 |
568 | sub.b #0x20,d1 |
569 | cmp.b #0x60,d1 |
570 | blo 0f |
571 | move.b #'.',d0 |
572 | 0: |
573 | move.w d0,(a0) |
574 | |
575 | move.b #0,d0 |
576 | rol.l #8,d0 |
577 | move.b d0,d1 |
578 | sub.b #0x20,d1 |
579 | cmp.b #0x60,d1 |
580 | blo 0f |
581 | move.b #'.',d0 |
582 | 0: |
583 | move.w d0,(a0) |
584 | |
585 | draw_chars_hsafe_next: |
586 | addq.l #2,a1 |
587 | dbra d4,draw_chars_hsafe |
27d5cc88 |
588 | |
589 | move.l #(' '<<16)|' ',(a0) |
27d5cc88 |
590 | add.w #0x80,a2 |
591 | dbra d5,draw_row |
592 | bra draw_status_bar |
593 | |
594 | |
595 | # normal draw |
596 | draw_row_safe: |
597 | btst.l #15,d7 |
598 | bne draw_row_words |
599 | |
600 | draw_row_bytes: |
601 | /* 8 bytes */ |
602 | moveq.l #2,d3 |
603 | moveq.l #8-1,d4 |
604 | draw_bytes: |
605 | move.w #' ',(a0) |
606 | move.b (a1)+,d2 |
607 | jsr print_hex_preped |
608 | dbra d4,draw_bytes |
609 | |
610 | move.w #' ',(a0) |
611 | |
612 | move.l d5,d0 |
613 | swap d0 |
614 | cmp.w d5,d0 |
615 | beq draw_cursor_byte |
616 | bra draw_chars_pre |
617 | |
618 | draw_row_words: |
1286a1ba |
619 | /* 4 shorts */ |
4276cd7a |
620 | moveq.l #4,d3 |
1286a1ba |
621 | moveq.l #4-1,d4 |
27d5cc88 |
622 | draw_words: |
1286a1ba |
623 | move.w #' ',(a0) |
624 | move.w (a1)+,d2 |
1286a1ba |
625 | jsr print_hex_preped |
27d5cc88 |
626 | dbra d4,draw_words |
627 | |
628 | move.l #(' '<<16)|' ',(a0) |
1286a1ba |
629 | |
4276cd7a |
630 | move.l d5,d0 |
631 | swap d0 |
632 | cmp.w d5,d0 |
27d5cc88 |
633 | beq draw_cursor_word |
4276cd7a |
634 | |
635 | draw_chars_pre: |
1286a1ba |
636 | /* 8 chars */ |
637 | subq.l #8,a1 |
638 | moveq.l #8-1,d4 |
639 | draw_chars: |
640 | move.b (a1)+,d0 |
641 | move.b d0,d1 |
642 | sub.b #0x20,d1 |
643 | cmp.b #0x60,d1 |
644 | blo 0f |
645 | move.w #'.',d0 |
646 | 0: |
647 | move.w d0,(a0) |
648 | dbra d4,draw_chars |
649 | |
27d5cc88 |
650 | move.l #(' '<<16)|' ',(a0) |
651 | |
1286a1ba |
652 | add.w #0x80,a2 |
27d5cc88 |
653 | dbra d5,draw_row |
1286a1ba |
654 | |
d4279640 |
655 | |
27d5cc88 |
656 | draw_status_bar: |
4276cd7a |
657 | /* status bar */ |
27d5cc88 |
658 | move.l a2,a0 |
4276cd7a |
659 | jsr load_prepare |
27d5cc88 |
660 | |
661 | btst.l #15,d7 |
662 | beq 0f |
663 | move.w #' ',(a0) |
664 | 0: |
4dfddc2f |
665 | mk_a6_addr d2 |
4276cd7a |
666 | move.l #0x4006,d3 |
667 | jsr print_hex_preped |
d4279640 |
668 | |
669 | /* clear error */ |
670 | moveq.l #5-1,d0 |
671 | 0: |
672 | move.l #' '|(' '<<16),(a0) |
673 | move.l #' '|(' '<<16),(a0) |
674 | dbra d0,0b |
675 | |
4276cd7a |
676 | |
1286a1ba |
677 | /* handle input */ |
678 | jsr get_input /* x0cbrldu x1sa00du */ |
1286a1ba |
679 | |
fbad1b76 |
680 | btst.l #16+4,d0 /* A - scroll modifier */ |
681 | beq input_noa |
682 | |
683 | do_dpad 16+0, sub, #0x0800 |
684 | do_dpad 16+1, add, #0x0800 |
685 | do_dpad 16+10, sub, #0xd800 |
686 | do_dpad 16+11, add, #0xd800 |
687 | input_noa: |
688 | moveq.l #0,d1 |
4dfddc2f |
689 | move.w d7,d1 |
690 | lsr.w #7,d1 |
691 | lsr.w #7,d1 |
fbad1b76 |
692 | |
693 | do_dpad 0, subq, #0x0008 |
694 | do_dpad 1, addq, #0x0008 |
695 | do_dpad 10, sub, d1 |
696 | do_dpad 11, add, d1 |
697 | |
698 | dpad_end: |
4dfddc2f |
699 | /* update addr */ |
700 | move.l a6,d1 |
701 | cmp.b #0xf0,d1 |
702 | blo 0f |
703 | sub.l #0xd800,a6 |
704 | add.w #0x00d8,a6 |
705 | bra 1f |
706 | 0: |
707 | cmp.b #0xd8,d1 |
708 | blo 1f |
709 | add.l #0xd800,a6 |
710 | sub.w #0x00d8,a6 |
711 | 1: |
712 | |
713 | /* other btns */ |
fbad1b76 |
714 | moveq.l #0,d1 |
715 | btst.l #12,d0 /* B - switch byte/word mode */ |
716 | beq input_nob |
4dfddc2f |
717 | bclr.l #15,d7 |
718 | add.w #0x4000,d7 /* changes between 01 10 */ |
fbad1b76 |
719 | move.l a6,d1 |
720 | and.l #1,d1 |
721 | sub.l d1,a6 /* make even, just in case */ |
722 | |
723 | input_nob: |
724 | btst.l #13,d0 /* C - edit selected byte */ |
725 | beq input_noc |
4dfddc2f |
726 | |
727 | change_mode MMODE_EDIT_VAL, MMODE_MAIN |
27d5cc88 |
728 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
fbad1b76 |
729 | |
730 | input_noc: |
27d5cc88 |
731 | btst.l #5,d0 /* Start - menu */ |
4dfddc2f |
732 | beq input_nos |
733 | |
27d5cc88 |
734 | moveq.l #0,d5 |
735 | change_mode MMODE_START_MENU, MMODE_MAIN |
736 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
1286a1ba |
737 | |
4dfddc2f |
738 | input_nos: |
fbad1b76 |
739 | vbl_end: |
d90ff128 |
740 | # movem.l (a7)+,d0-d4/a0-a5 |
318e20ff |
741 | .if USE_VINT |
1286a1ba |
742 | rte |
318e20ff |
743 | .else |
744 | rts |
745 | .endif |
1286a1ba |
746 | |
747 | |
27d5cc88 |
748 | draw_cursor_unsafe_byte: |
749 | move.l a6,d0 |
750 | and.l #7,d0 /* byte offs */ |
751 | move.b d0,d1 |
752 | add.b d0,d0 |
753 | add.b d1,d0 /* d0 *= 3 (chars) */ |
754 | add.b d0,d0 |
755 | lea (7*2,a2,d0),a0 |
756 | jsr load_prepare |
757 | move.l #(0x2000|'?'|((0x2000|'?')<<16)),(a0) |
758 | |
759 | move.l a2,a0 |
760 | add.w #31*2,a0 |
761 | jsr load_prepare /* restore a0 */ |
318e20ff |
762 | bra draw_chars_hsafe_pre |
27d5cc88 |
763 | |
764 | draw_cursor_unsafe_word: |
4276cd7a |
765 | move.l a6,d0 |
766 | and.l #7,d0 /* byte offs */ |
767 | move.l d0,d1 |
768 | lsr.b #1,d1 /* which word */ |
769 | move.b d1,d2 |
770 | lsl.b #2,d2 |
771 | add.b d2,d1 /* num of chars to skip */ |
27d5cc88 |
772 | add.b d1,d1 |
773 | |
774 | lea (8*2,a2,d1),a0 |
775 | jsr load_prepare |
776 | move.l #(0x2000|'?'|((0x2000|'?')<<16)),d0 |
777 | move.l d0,(a0) |
778 | move.l d0,(a0) |
779 | |
780 | move.l a2,a0 |
781 | add.w #29*2,a0 |
782 | jsr load_prepare /* restore a0 */ |
318e20ff |
783 | bra draw_chars_hsafe_pre |
4276cd7a |
784 | |
4276cd7a |
785 | |
fbad1b76 |
786 | draw_cursor_byte: |
27d5cc88 |
787 | move.l a6,d0 |
788 | and.l #7,d0 /* byte offs */ |
789 | move.w #0x2002,d3 |
790 | |
fbad1b76 |
791 | move.b (-8,a1,d0),d2 |
27d5cc88 |
792 | move.b d0,d1 |
793 | add.b d0,d0 |
794 | add.b d1,d0 /* d0 *= 3 (chars) */ |
795 | add.b d0,d0 |
796 | lea (7*2,a2,d0),a0 |
797 | jsr load_prepare |
798 | jsr print_hex_preped |
799 | |
800 | move.l a2,a0 |
801 | add.w #31*2,a0 |
802 | jsr load_prepare /* restore a0 */ |
803 | |
318e20ff |
804 | bra draw_chars_pre |
fbad1b76 |
805 | |
806 | draw_cursor_word: |
27d5cc88 |
807 | move.l a6,d0 |
808 | and.l #7,d0 /* byte offs */ |
809 | move.l d0,d1 |
810 | lsr.b #1,d1 /* which word */ |
811 | move.b d1,d2 |
812 | lsl.b #2,d2 |
813 | add.b d2,d1 /* num of chars to skip */ |
814 | add.b d1,d1 |
815 | move.w #0x2004,d3 |
816 | |
fbad1b76 |
817 | move.w (-8,a1,d0),d2 |
27d5cc88 |
818 | lea (8*2,a2,d1),a0 |
4276cd7a |
819 | jsr load_prepare |
4276cd7a |
820 | jsr print_hex_preped |
821 | |
822 | move.l a2,a0 |
27d5cc88 |
823 | add.w #29*2,a0 |
4276cd7a |
824 | jsr load_prepare /* restore a0 */ |
825 | |
318e20ff |
826 | bra draw_chars_pre |
4276cd7a |
827 | |
828 | |
4dfddc2f |
829 | #################### hedit ####################### |
830 | |
831 | mode_edit_val: |
832 | btst.l #7,d6 |
833 | bne mode_hedit_finish |
834 | |
835 | /* read val to edit */ |
5f6473d9 |
836 | moveq.l #0,d5 |
4dfddc2f |
837 | mk_a6_addr d1 |
838 | move.l d1,a0 |
4dfddc2f |
839 | btst.l #15,d7 |
840 | bne 0f |
5f6473d9 |
841 | move.b (a0),d5 |
842 | lsl.l #8,d5 |
843 | or.b #1,d5 |
4dfddc2f |
844 | bra 1f |
845 | 0: |
5f6473d9 |
846 | move.w (a0),d5 |
847 | lsl.l #8,d5 |
848 | or.b #2,d5 |
4dfddc2f |
849 | 1: |
4dfddc2f |
850 | |
4dfddc2f |
851 | change_mode MMODE_VAL_INPUT, MMODE_EDIT_VAL |
318e20ff |
852 | bra vbl_end |
4dfddc2f |
853 | |
854 | mode_hedit_finish: |
855 | /* write the val */ |
856 | mk_a6_addr d1 |
857 | move.l d1,a0 |
5f6473d9 |
858 | lsr.l #8,d5 |
4dfddc2f |
859 | |
860 | btst.l #15,d7 |
861 | bne 0f |
5f6473d9 |
862 | move.b d5,(a0) |
4dfddc2f |
863 | bra 1f |
864 | 0: |
5f6473d9 |
865 | move.w d5,(a0) |
4dfddc2f |
866 | 1: |
867 | |
4dfddc2f |
868 | bra return_to_main |
869 | |
870 | ##################### goto ####################### |
871 | |
872 | mode_goto: |
873 | btst.l #7,d6 |
874 | bne mode_goto_finish |
fbad1b76 |
875 | |
5f6473d9 |
876 | moveq.l #0,d5 |
877 | swap d6 |
878 | move.w d6,d5 |
879 | swap d6 |
880 | swap d5 |
881 | or.b #3,d5 /* 3 bytes */ |
4dfddc2f |
882 | bclr.l #7,d6 |
883 | change_mode MMODE_VAL_INPUT, MMODE_GOTO |
318e20ff |
884 | bra vbl_end |
4dfddc2f |
885 | |
886 | mode_goto_finish: |
5f6473d9 |
887 | lsr.l #8,d5 |
888 | move.l d5,d0 |
4dfddc2f |
889 | move.l d0,d1 |
890 | and.l #7,d1 |
891 | and.b #0xf8,d0 |
892 | lsl.l #8,d0 |
893 | or.l d1,d0 |
894 | move.l d0,a6 |
895 | |
5f6473d9 |
896 | lsr.l #8,d5 |
897 | swap d6 |
898 | move.w d5,d6 |
899 | swap d6 |
900 | |
4dfddc2f |
901 | bra return_to_main |
902 | |
903 | ################### val edit ##################### |
904 | |
905 | mode_val_input: |
906 | /* frame */ |
907 | movea.l #0xe000+14*2+11*64*2,a1 |
908 | moveq.l #6-1,d1 |
909 | 0: |
910 | move.w a1,a0 |
911 | jsr load_prepare |
912 | moveq.l #11-1,d0 |
913 | 1: |
914 | move.w #0,(a0) |
915 | dbra d0,1b |
916 | |
917 | add.w #64*2,a1 |
918 | dbra d1,0b |
919 | |
920 | /* text */ |
318e20ff |
921 | lea (txt_edit,pc),a0 |
4dfddc2f |
922 | move.l #15,d0 |
923 | move.l #11,d1 |
924 | move.l #0xc000,d2 |
925 | jsr print |
926 | |
318e20ff |
927 | lea (txt_a_confirm,pc),a0 |
4dfddc2f |
928 | move.l #15,d0 |
929 | move.l #15,d1 |
930 | move.l #0xc000,d2 |
931 | jsr print |
932 | |
933 | /* edit field */ |
934 | moveq.l #0,d0 |
935 | moveq.l #0,d1 |
936 | moveq.l #0,d3 |
5f6473d9 |
937 | move.b d5,d3 |
938 | and.b #3,d3 /* edit field bytes */ |
4dfddc2f |
939 | |
940 | move.b #19,d0 |
941 | sub.b d3,d0 |
942 | move.b #13,d1 |
5f6473d9 |
943 | move.l d5,d2 |
4dfddc2f |
944 | lsr.l #8,d2 |
945 | add.b d3,d3 |
946 | or.w #0x8000,d3 |
947 | jsr print_hex |
948 | |
949 | /* current char */ |
950 | moveq.l #0,d0 |
951 | moveq.l #0,d1 |
952 | |
953 | and.w #6,d3 |
954 | move.b #19,d0 |
955 | move.b d3,d1 |
956 | lsr.b #1,d1 /* length in bytes */ |
957 | sub.b d1,d0 |
5f6473d9 |
958 | move.b d5,d1 |
959 | lsr.b #2,d1 |
4dfddc2f |
960 | and.b #7,d1 /* nibble to edit */ |
961 | add.b d1,d0 |
962 | |
963 | sub.b d1,d3 |
964 | sub.b #1,d3 /* chars to shift out */ |
965 | lsl.b #2,d3 |
966 | add.b #8,d3 |
5f6473d9 |
967 | move.l d5,d2 |
4dfddc2f |
968 | lsr.l d3,d2 |
969 | |
970 | move.b #13,d1 |
971 | move.w #0xa001,d3 |
972 | jsr print_hex |
973 | |
974 | /* handle input */ |
975 | jsr get_input /* x0cbrldu x1sa00du */ |
976 | |
977 | move.w d0,d1 |
978 | and.w #0x0f00,d1 |
979 | beq ai_no_dpad |
5f6473d9 |
980 | move.b d5,d1 |
981 | and.b #3,d1 |
4dfddc2f |
982 | add.b d1,d1 /* nibble count */ |
983 | sub.b #1,d1 /* max n.t.e. val */ |
5f6473d9 |
984 | move.b d5,d2 |
985 | lsr.b #2,d2 |
4dfddc2f |
986 | and.b #7,d2 /* nibble to edit */ |
987 | |
988 | move.b d0,d3 |
989 | and.b #3,d3 |
990 | beq ai_no_ud |
991 | moveq.l #0,d3 |
992 | moveq.l #0,d4 |
993 | move.b #0xf,d3 |
994 | move.b #0x1,d4 |
995 | sub.b d2,d1 |
996 | lsl.b #2,d1 |
997 | add.b #8,d1 |
998 | lsl.l d1,d3 /* mask */ |
999 | lsl.l d1,d4 /* what to add/sub */ |
5f6473d9 |
1000 | move.l d5,d1 |
4dfddc2f |
1001 | and.l d3,d1 |
1002 | btst.l #8,d0 |
1003 | beq 0f |
1004 | add.l d4,d1 |
1005 | bra 1f |
1006 | 0: |
1007 | sub.l d4,d1 |
1008 | 1: |
1009 | and.l d3,d1 |
1010 | eor.l #0xffffffff,d3 |
5f6473d9 |
1011 | and.l d3,d5 |
1012 | or.l d1,d5 |
318e20ff |
1013 | bra vbl_end |
4dfddc2f |
1014 | |
1015 | ai_no_ud: |
1016 | btst.l #10,d0 |
1017 | bne 0f |
1018 | add.b #1,d2 |
1019 | bra 1f |
1020 | 0: |
1021 | sub.b #1,d2 |
1022 | 1: |
1023 | cmp.b #0,d2 |
1024 | bge 0f |
1025 | move.b d1,d2 |
1026 | 0: |
1027 | cmp.b d1,d2 |
1028 | ble 0f |
1029 | move.b #0,d2 |
1030 | 0: |
5f6473d9 |
1031 | and.b #0xe3,d5 |
1032 | lsl.b #2,d2 |
1033 | or.b d2,d5 |
318e20ff |
1034 | bra vbl_end |
4dfddc2f |
1035 | |
1036 | ai_no_dpad: |
1037 | move.w d0,d1 |
1038 | and.w #0x1020,d1 |
1039 | beq ai_no_sb |
1040 | |
4dfddc2f |
1041 | bra return_to_main |
1042 | |
1043 | ai_no_sb: |
5f6473d9 |
1044 | btst.l #4,d0 /* A - confirm */ |
4dfddc2f |
1045 | beq ai_no_input |
1046 | bset.l #7,d6 |
5f6473d9 |
1047 | move.w d7,d1 /* back to prev mode */ |
4dfddc2f |
1048 | and.w #0x3800,d1 |
1049 | lsr.w #3,d1 |
1050 | and.w #0xc0ff,d7 |
1051 | or.w d1,d7 |
1052 | |
1053 | ai_no_input: |
318e20ff |
1054 | bra vbl_end |
4dfddc2f |
1055 | |
1056 | |
27d5cc88 |
1057 | ################### start menu ################### |
1058 | |
1059 | mode_start_menu: |
1060 | /* frame */ |
1061 | bsr start_menu_box |
1062 | |
1063 | /* text */ |
1064 | menu_text txt_about, 13, 9, 1 |
1065 | menu_text txt_goto, 13, 11, 0 |
1066 | menu_text txt_goto_predef, 13, 12, 0 |
d90ff128 |
1067 | menu_text txt_jmp_addr, 13, 13, 0 |
80560599 |
1068 | menu_text txt_dump, 13, 14, 0 |
1069 | menu_text txt_dtack, 13, 15, 0 |
1070 | menu_text txt_a_confirm, 13, 17, 2 |
27d5cc88 |
1071 | |
1072 | /* dtack safety on/off */ |
80560599 |
1073 | movea.l #0xe000+26*2+15*64*2,a0 |
27d5cc88 |
1074 | jsr load_prepare |
1075 | move.w #0x8000|'O',(a0) |
1076 | btst.l #4,d6 |
1077 | bne 0f |
1078 | move.w #0x8000|'N',(a0) |
1079 | bra 1f |
1080 | 0: |
1081 | move.w #0x8000|'F',(a0) |
1082 | move.w #0x8000|'F',(a0) |
1083 | 1: |
1084 | |
1085 | /* cursor */ |
1086 | movea.l #0xe000+11*2+11*64*2,a0 |
1087 | moveq.l #0,d0 |
1088 | move.b d5,d0 |
80560599 |
1089 | and.b #7,d0 |
27d5cc88 |
1090 | lsl.w #7,d0 |
1091 | add.w d0,a0 |
1092 | jsr load_prepare |
1093 | move.w #'>',(a0) |
1094 | |
1095 | /* input */ |
1096 | jsr get_input /* x0cbrldu x1sa00du */ |
1097 | |
1098 | move.w d0,d1 |
1099 | and.w #3,d1 |
1100 | beq msm_no_ud |
1101 | move.b d5,d1 |
80560599 |
1102 | and.b #7,d1 |
27d5cc88 |
1103 | btst.l #0,d0 |
1104 | sne d2 |
1105 | or.b #1,d2 /* up -1, down 1 */ |
1106 | add.b d2,d1 |
1107 | cmp.b #0,d1 |
1108 | bge 0f |
80560599 |
1109 | move.b #4,d1 |
27d5cc88 |
1110 | 0: |
80560599 |
1111 | cmp.b #4,d1 |
27d5cc88 |
1112 | ble 0f |
1113 | move.b #0,d1 |
1114 | 0: |
80560599 |
1115 | and.b #0xf8,d5 |
27d5cc88 |
1116 | or.b d1,d5 |
318e20ff |
1117 | bra vbl_end |
27d5cc88 |
1118 | |
1119 | msm_no_ud: |
1120 | btst.l #4,d0 /* A - confirm */ |
1121 | beq msm_no_a |
1122 | move.b d5,d1 |
80560599 |
1123 | and.b #7,d1 |
27d5cc88 |
1124 | bne 0f |
1125 | change_mode MMODE_GOTO, MMODE_MAIN |
1126 | bsr start_menu_box |
318e20ff |
1127 | bra vbl_end |
27d5cc88 |
1128 | 0: |
1129 | cmp.b #1,d1 |
1130 | bne 0f |
1131 | moveq.l #0,d5 |
1132 | change_mode MMODE_GOTO_PREDEF, MMODE_MAIN |
1133 | bsr start_menu_box |
318e20ff |
1134 | bra vbl_end |
27d5cc88 |
1135 | 0: |
1136 | cmp.b #2,d1 |
1137 | bne 0f |
d90ff128 |
1138 | change_mode MMODE_JMP_ADDR, MMODE_MAIN |
1139 | bsr start_menu_box |
318e20ff |
1140 | bra vbl_end |
d90ff128 |
1141 | 0: |
1142 | cmp.b #3,d1 |
1143 | bne 0f |
80560599 |
1144 | change_mode MMODE_DUMP, MMODE_MAIN |
1145 | bsr start_menu_box |
1146 | bra vbl_end |
1147 | 0: |
1148 | cmp.b #4,d1 |
1149 | bne 0f |
27d5cc88 |
1150 | bchg.l #4,d6 |
318e20ff |
1151 | bra vbl_end |
27d5cc88 |
1152 | 0: |
1153 | |
1154 | msm_no_a: |
1155 | move.w d0,d1 |
1156 | and.w #0x3000,d1 |
1157 | beq msm_no_bc |
1158 | bra return_to_main |
1159 | |
1160 | msm_no_bc: |
318e20ff |
1161 | bra vbl_end |
27d5cc88 |
1162 | |
1163 | start_menu_box: |
1164 | movea.l #0xe000+10*2+8*64*2,a1 |
80560599 |
1165 | move.w #11-1,d1 |
27d5cc88 |
1166 | 0: |
1167 | move.w a1,a0 |
1168 | jsr load_prepare |
1169 | move.w #20-1,d0 |
1170 | 1: |
1171 | move.w #0,(a0) |
1172 | dbra d0,1b |
1173 | |
1174 | add.w #64*2,a1 |
1175 | dbra d1,0b |
1176 | rts |
1177 | |
1178 | ################### goto predef ################## |
1179 | |
1180 | mode_goto_predef: |
1181 | /* frame */ |
1182 | movea.l #0xe000+14*2+8*64*2,a1 |
1183 | move.l #predef_addr_cnt+2-1,d1 |
1184 | 0: |
1185 | move.w a1,a0 |
1186 | jsr load_prepare |
1187 | moveq.l #10-1,d0 |
1188 | 1: |
1189 | move.w #0,(a0) |
1190 | dbra d0,1b |
1191 | |
1192 | add.w #64*2,a1 |
1193 | dbra d1,0b |
1194 | |
1195 | /* draw addresses */ |
1196 | movea.l #0xe000+17*2+9*64*2,a1 |
318e20ff |
1197 | lea (predef_addrs,pc),a2 |
27d5cc88 |
1198 | move.w #predef_addr_cnt-1,d4 |
1199 | move.l #0x8006,d3 |
1200 | mgp_da_loop: |
1201 | move.w a1,a0 |
1202 | jsr load_prepare |
1203 | move.l (a2)+,d2 |
1204 | jsr print_hex_preped |
1205 | add.w #64*2,a1 |
1206 | dbra d4,mgp_da_loop |
1207 | |
1208 | /* cursor */ |
1209 | movea.l #0xe000+15*2+9*64*2,a0 |
1210 | moveq.l #0,d0 |
1211 | move.b d5,d0 |
1212 | lsl.w #7,d0 |
1213 | add.w d0,a0 |
1214 | jsr load_prepare |
1215 | move.w #'>',(a0) |
1216 | |
1217 | /* input */ |
1218 | jsr get_input /* x0cbrldu x1sa00du */ |
1219 | |
1220 | move.w d0,d1 |
1221 | and.w #3,d1 |
1222 | beq mgp_no_ud |
1223 | btst.l #0,d0 |
1224 | sne d2 |
1225 | or.b #1,d2 /* up -1, down 1 */ |
1226 | add.b d2,d5 |
1227 | cmp.b #0,d5 |
1228 | bge 0f |
1229 | move.b #predef_addr_cnt-1,d5 |
1230 | 0: |
1231 | cmp.b #predef_addr_cnt-1,d5 |
1232 | ble 0f |
1233 | move.b #0,d5 |
1234 | 0: |
318e20ff |
1235 | bra vbl_end |
27d5cc88 |
1236 | |
1237 | mgp_no_ud: |
1238 | btst.l #4,d0 /* A - confirm */ |
1239 | beq mgp_no_a |
1240 | moveq.l #0,d0 |
1241 | move.b d5,d0 |
1242 | lsl.w #2,d0 |
318e20ff |
1243 | lea (predef_addrs,pc),a0 |
27d5cc88 |
1244 | move.l (a0,d0),d5 |
1245 | lsl.l #8,d5 |
318e20ff |
1246 | bra mode_goto_finish |
27d5cc88 |
1247 | |
1248 | mgp_no_a: |
1249 | move.w d0,d1 |
1250 | and.w #0x3000,d1 |
1251 | beq mgp_no_bc |
1252 | bra return_to_main |
1253 | |
1254 | mgp_no_bc: |
318e20ff |
1255 | bra vbl_end |
27d5cc88 |
1256 | |
d90ff128 |
1257 | ##################### jmp ######################## |
1258 | |
1259 | mode_jmp_addr: |
1260 | btst.l #7,d6 |
1261 | bne mode_jmp_finish |
1262 | |
1263 | moveq.l #0,d5 |
1264 | or.b #3,d5 /* 3 bytes */ |
1265 | bclr.l #7,d6 |
1266 | change_mode MMODE_VAL_INPUT, MMODE_JMP_ADDR |
318e20ff |
1267 | bra vbl_end |
d90ff128 |
1268 | |
1269 | mode_jmp_finish: |
1270 | lsr.l #8,d5 |
1271 | write_vdp_r_dst 1,(VDP1_E_DISPLAY | VDP1_MODE5),(GFXCNTL) /* disable vint */ |
1272 | move.l d5,a0 |
1273 | jmp (a0) |
1274 | |
80560599 |
1275 | ################### transfer ##################### |
1276 | |
1277 | mode_transfer: |
1278 | move.b #0x40,(0xa1000b).l |
1279 | move.b #0x40,(0xa10005).l |
1280 | |
1281 | move.l (transfer_mode,pc),d0 |
1282 | tst.l d0 |
1283 | bne 0f |
1284 | lea (txt_ready_send,pc),a0 |
1285 | bra 1f |
1286 | 0: |
1287 | lea (txt_ready_recv,pc),a0 |
1288 | 1: |
1289 | move.l #13,d0 |
1290 | move.l #13,d1 |
1291 | move.l #0x8000,d2 |
1292 | jsr print |
1293 | |
1294 | wait_tl_low0: |
1295 | move.b (0xa10005),d0 |
1296 | btst.b #4,d0 |
1297 | bne wait_tl_low0 |
1298 | |
1299 | menu_text txt_working, 13, 13, 0 |
1300 | |
1301 | lea 0xa10005,a1 |
1302 | move.l (transfer_addr,pc),a0 |
1303 | move.l (transfer_len,pc),d2 |
1304 | |
1305 | move.l (transfer_mode,pc),d0 |
1306 | tst.l d0 |
1307 | bne transfer_recv |
1308 | |
1309 | transfer_send: |
1310 | move.b #0x4f,(0xa1000b).l |
1311 | |
1312 | tr_send_loop: |
1313 | move.b (a0),d1 |
1314 | and.b #0x0f,d1 |
1315 | |
1316 | wait_tl_low1: |
1317 | move.b (a1),d0 |
1318 | btst.b #4,d0 |
1319 | bne wait_tl_low1 |
1320 | |
1321 | move.b d1,(a1) /* clears TH and writes data */ |
1322 | |
1323 | move.b (a0)+,d1 |
1324 | lsr.b #4,d1 |
1325 | bset.b #6,d1 /* prepare TH */ |
1326 | |
1327 | wait_tl_hi1: |
1328 | move.b (a1),d0 |
1329 | btst.b #4,d0 |
1330 | beq wait_tl_hi1 |
1331 | |
1332 | move.b d1,(a1) |
1333 | subq.l #1,d2 |
1334 | bne tr_send_loop |
1335 | |
1336 | move.b #0,(0xa1000b).l |
1337 | bra return_to_main |
1338 | |
1339 | transfer_recv: |
1340 | move.b #0,(a1) /* clear TH */ |
1341 | |
1342 | tr_recv_loop: |
1343 | wait_tl_low2: |
1344 | move.b (a1),d0 |
1345 | btst.b #4,d0 |
1346 | bne wait_tl_low2 |
1347 | |
1348 | move.b #0x40,(a1) /* set TH */ |
1349 | move.b d0,d1 |
1350 | and.b #0x0f,d1 |
1351 | |
1352 | wait_tl_hi2: |
1353 | move.b (a1),d0 |
1354 | btst.b #4,d0 |
1355 | beq wait_tl_hi2 |
1356 | |
1357 | move.b #0,(a1) /* clear TH */ |
1358 | lsl.b #4,d0 |
1359 | or.b d0,d1 |
1360 | move.b d1,(a0)+ |
1361 | |
1362 | subq.l #1,d2 |
1363 | bne tr_recv_loop |
1364 | |
1365 | move.b #0,(0xa1000b).l |
1366 | bra return_to_main |
1367 | |
27d5cc88 |
1368 | |
4dfddc2f |
1369 | # go back to main mode |
1370 | return_to_main: |
5f6473d9 |
1371 | bclr.l #7,d6 /* not edited */ |
4dfddc2f |
1372 | change_mode MMODE_MAIN, MMODE_MAIN |
27d5cc88 |
1373 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320),(GFXCNTL) |
318e20ff |
1374 | bra vbl_end |
fbad1b76 |
1375 | |
1376 | |
4db6e09f |
1377 | ################################################# |
1378 | # # |
1379 | # Initialize VDP registers # |
1380 | # # |
1381 | ################################################# |
1382 | |
1383 | init_gfx: |
1384 | move.l #GFXCNTL,a3 |
570c4371 |
1385 | write_vdp_reg 0,(VDP0_E_DISPLAY | VDP0_PLTT_FULL) |
318e20ff |
1386 | write_vdp_reg 1,(VDP1_E_DISPLAY | VDP1_MODE5) |
4db6e09f |
1387 | write_vdp_reg 2,(0xe000 >> 10) /* Screen map a adress */ |
1388 | write_vdp_reg 3,(0xe000 >> 10) /* Window address */ |
1389 | write_vdp_reg 4,(0xc000 >> 13) /* Screen map b address */ |
1390 | write_vdp_reg 5,(0xfc00 >> 9) /* Sprite address */ |
1391 | write_vdp_reg 6,0 |
570c4371 |
1392 | write_vdp_reg 7,0 /* Backdrop color */ |
80560599 |
1393 | write_vdp_reg 0x0a,1 /* Lines per hblank interrupt */ |
1394 | write_vdp_reg 0x0b,0 /* 2-cell vertical scrolling */ |
1395 | write_vdp_reg 0x0c,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320) |
1396 | write_vdp_reg 0x0d,(0x8000 >> 10) /* Horizontal scroll address */ |
1397 | write_vdp_reg 0x0e,0 |
1398 | write_vdp_reg 0x0f,2 |
1399 | write_vdp_reg 0x10,(VDP16_MAP_V32 | VDP16_MAP_H64) /* layer size */ |
1400 | write_vdp_reg 0x11,0 |
1401 | write_vdp_reg 0x12,0 |
4db6e09f |
1402 | rts |
1403 | |
1404 | |
d4279640 |
1405 | # get mask of bits representing safe words |
27d5cc88 |
1406 | # a1 - address to check |
1407 | # destroys d0-d2, strips upper bits from a1 |
d4279640 |
1408 | get_safety_mask: |
27d5cc88 |
1409 | move.l a1,d1 |
1410 | lsl.l #8,d1 |
1411 | lsr.l #8,d1 |
318e20ff |
1412 | lea (safe_addrs,pc),a1 |
27d5cc88 |
1413 | move.w #(safe_addrs_end - safe_addrs)/8-1,d2 |
1414 | 0: |
1415 | move.l (a1)+,d0 |
1416 | cmp.l d0,d1 |
1417 | blt 1f |
1418 | move.l (a1),d0 |
1419 | cmp.l d0,d1 |
1420 | ble addr_safe |
1421 | 1: |
1422 | addq.l #4,a1 |
1423 | dbra d2,0b |
1424 | |
27d5cc88 |
1425 | move.l d1,a1 |
d4279640 |
1426 | |
1427 | moveq.l #0x0c,d0 |
1428 | cmp.l #0xa14000,d1 |
1429 | beq gsm_rts |
1430 | |
1431 | moveq.l #0x08,d0 |
1432 | cmp.l #0xa14100,d1 |
1433 | beq gsm_rts |
1434 | |
1435 | /* check for VDP address */ |
1436 | move.l d1,d0 |
1437 | swap d0 |
1438 | and.b #0xe0,d0 |
1439 | cmp.b #0xc0,d0 |
1440 | bne addr_unsafe /* not vdp */ |
1441 | |
1442 | move.l d1,d0 |
1443 | and.l #0x0700e0,d0 |
1444 | bne addr_unsafe |
1445 | |
1446 | move.l d1,d0 |
1447 | and.b #0x1f,d0 |
1448 | cmp.b #0x04,d0 |
1449 | blt addr_hsafe_3 /* data port */ |
1450 | cmp.b #0x10,d0 |
1451 | blt addr_safe /* below PSG */ |
1452 | cmp.b #0x18,d0 |
1453 | bge addr_safe /* above PSG */ |
1454 | |
1455 | addr_unsafe: |
1456 | moveq.l #0,d0 /* skip line */ |
1457 | rts |
1458 | |
1459 | addr_hsafe_3: |
1460 | moveq.l #3,d0 /* skip 2 words */ |
27d5cc88 |
1461 | rts |
1462 | |
1463 | addr_safe: |
1464 | move.l d1,a1 |
d4279640 |
1465 | moveq.l #0xf,d0 |
1466 | gsm_rts: |
27d5cc88 |
1467 | rts |
1468 | |
1469 | |
1286a1ba |
1470 | # read single phase from controller |
fbad1b76 |
1471 | # #a0 - addr |
1286a1ba |
1472 | # d0 - result |
fbad1b76 |
1473 | # destroys d1,d2 |
1286a1ba |
1474 | get_input: |
1475 | move.b #0x40,(0xa10003) |
1476 | nop |
1477 | nop |
1478 | nop |
1479 | move.b (0xa10003),d0 |
1480 | move.b #0x00,(0xa10003) |
1481 | lsl.w #8,d0 |
1482 | nop |
1483 | move.b (0xa10003),d0 |
1484 | eor.w #0xffff,d0 |
fbad1b76 |
1485 | |
1486 | swap d7 |
1487 | move.w d7,d1 |
1488 | eor.w d0,d1 /* changed btns */ |
1489 | move.w d0,d7 /* old val */ |
1490 | swap d7 |
1491 | and.w d0,d1 /* what changed now */ |
1492 | bne 0f |
1493 | |
1494 | addq.b #1,d6 |
1495 | move.b d6,d2 |
27d5cc88 |
1496 | and.b #0x0f,d2 /* do autorepeat */ |
1497 | cmp.b #9,d2 |
fbad1b76 |
1498 | bne 1f |
1499 | move.w d0,d1 |
1500 | 0: |
27d5cc88 |
1501 | and.b #0xf0,d6 |
fbad1b76 |
1502 | 1: |
1503 | swap d0 |
1504 | move.w d1,d0 |
1286a1ba |
1505 | rts |
1506 | |
4dfddc2f |
1507 | # Prepare to write to VDP RAM @a0 |
0fc4f06b |
1508 | # sets a0 to VDP data port for convenience |
1509 | # a0: VRAM base |
1510 | # destroys d0 |
570c4371 |
1511 | |
4db6e09f |
1512 | load_prepare: |
0fc4f06b |
1513 | VRAM_ADDR_var a0 |
1514 | move.l d0,(GFXCNTL).l |
1515 | move.l #GFXDATA,a0 |
4db6e09f |
1516 | rts |
1517 | |
1518 | |
0fc4f06b |
1519 | # Load color data from ROM |
1520 | # a0: CRAM base |
1521 | # a1: color list address |
1522 | # d0: number of colors to load |
1523 | # destroys d1 |
4db6e09f |
1524 | |
1525 | load_colors: |
0fc4f06b |
1526 | move.l d0,d1 |
1527 | CRAM_ADDR_var a0 |
1528 | move.l d0,(GFXCNTL).l |
4db6e09f |
1529 | |
0fc4f06b |
1530 | move.l #GFXDATA,a0 |
1531 | subq.w #1,d1 |
1532 | 0: |
1533 | move.w (a1)+,(a0) |
1534 | dbra d1,0b |
4db6e09f |
1535 | |
1536 | rts |
1537 | |
0fc4f06b |
1538 | |
1539 | # print |
1540 | # a0 - string |
1541 | # d0 - x |
1542 | # d1 - y |
4dfddc2f |
1543 | # d2 - tile_bits[15:11] |
0fc4f06b |
1544 | # destroys a1 |
570c4371 |
1545 | |
1546 | print: |
0fc4f06b |
1547 | move.l a0,a1 |
1286a1ba |
1548 | XY2NT |
0fc4f06b |
1549 | jsr load_prepare |
4dfddc2f |
1550 | move.l d2,d0 |
1551 | and.w #0xf800,d0 |
570c4371 |
1552 | |
1553 | _print_loop: |
0fc4f06b |
1554 | move.b (a1)+,d0 |
570c4371 |
1555 | beq _print_end |
1556 | |
0fc4f06b |
1557 | move.w d0,(a0) |
318e20ff |
1558 | bra _print_loop |
570c4371 |
1559 | |
1560 | _print_end: |
1561 | rts |
1562 | |
4db6e09f |
1563 | |
1286a1ba |
1564 | # print_hex |
1565 | # d0 - x |
1566 | # d1 - y |
1567 | # d2 - value |
27d5cc88 |
1568 | # d3 - tile_bits[15:11]|digit_cnt[7:0] |
4276cd7a |
1569 | # destroys a0, preserves d3 |
1286a1ba |
1570 | |
1571 | print_hex: |
1572 | XY2NT |
1573 | jsr load_prepare |
1574 | |
1575 | print_hex_preped: |
4276cd7a |
1576 | moveq.l #0,d0 |
1577 | move.b d3,d0 |
1578 | move.l d0,d1 |
1286a1ba |
1579 | lsl.b #2,d0 |
1580 | ror.l d0,d2 /* prep value */ |
4276cd7a |
1581 | subq.l #1,d1 /* count */ |
1582 | move.w d3,d0 |
1583 | and.w #0xf800,d0 /* keep upper bits in d0 */ |
1286a1ba |
1584 | |
1585 | _print_hex_loop: |
1586 | rol.l #4,d2 |
1587 | move.b d2,d0 |
1588 | and.b #0xf,d0 |
1286a1ba |
1589 | |
1590 | add.b #'0',d0 |
4276cd7a |
1591 | cmp.b #'9',d0 |
1592 | ble 0f |
1593 | addq.b #7,d0 |
1594 | 0: |
1286a1ba |
1595 | move.w d0,(a0) |
4276cd7a |
1596 | dbra d1,_print_hex_loop |
1286a1ba |
1597 | |
1598 | rts |
1599 | |
1600 | |
318e20ff |
1601 | # wait vertical sync interrupt |
4db6e09f |
1602 | |
1603 | wait_vsync: |
fbad1b76 |
1604 | move.b d7,d0 |
4db6e09f |
1605 | _wait_change: |
1606 | stop #0x2000 |
fbad1b76 |
1607 | cmp.b d7,d0 |
4db6e09f |
1608 | beq _wait_change |
1609 | rts |
1610 | |
1611 | |
318e20ff |
1612 | # wait vsync start (polling) |
1613 | # destroys a0,d0 |
1614 | |
1615 | wait_vsync_poll: |
1616 | move.l #GFXCNTL,a0 |
1617 | 0: |
1618 | move.w (a0),d0 |
1619 | and.b #8,d0 |
1620 | nop |
1621 | nop |
1622 | bne 0b |
1623 | 0: |
1624 | move.w (a0),d0 |
1625 | and.b #8,d0 |
1626 | nop |
1627 | nop |
1628 | beq 0b |
1629 | rts |
1630 | |
1631 | |
4db6e09f |
1632 | ################################################# |
1633 | # # |
1634 | # RAM DATA # |
1635 | # # |
1636 | ################################################# |
1637 | |
1638 | .bss |
570c4371 |
1639 | |
fbad1b76 |
1640 | # nothing :) |
4db6e09f |
1641 | |
1642 | .end |
1643 | |
1644 | # vim:filetype=asmM68k |