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 |
4db6e09f |
83 | |
27d5cc88 |
84 | .equ predef_addr_cnt, ((predef_addrs_end-predef_addrs)/4) |
4db6e09f |
85 | |
86 | ################################################## |
87 | # # |
88 | # MACROS # |
89 | # # |
90 | ################################################## |
91 | |
92 | |
27d5cc88 |
93 | # Write val to VDP register reg |
94 | .macro write_vdp_r_dst reg val dst |
95 | move.w #((\reg << 8) + 0x8000 + \val),\dst |
4db6e09f |
96 | .endm |
97 | |
27d5cc88 |
98 | # Write val to VDP register reg, vdp addr in a3 |
99 | .macro write_vdp_reg reg val |
100 | write_vdp_r_dst \reg, \val, (a3) |
101 | .endm |
4db6e09f |
102 | |
d90ff128 |
103 | # Set up address in VDP, control port in dst |
104 | .macro VRAM_ADDR adr dst |
105 | move.l #(((0x4000 | (\adr & 0x3fff)) << 16) | (\adr >> 14)),\dst |
0fc4f06b |
106 | .endm |
107 | |
108 | |
109 | # make VDP word from address adr and store in d0 |
110 | .macro XRAM_ADDR_var adr |
570c4371 |
111 | move.l \adr,d0 |
0fc4f06b |
112 | lsl.l #8,d0 |
113 | lsl.l #8,d0 |
114 | rol.l #2,d0 |
115 | lsl.b #2,d0 |
116 | lsr.l #2,d0 |
4db6e09f |
117 | .endm |
118 | |
119 | |
0fc4f06b |
120 | .macro VRAM_ADDR_var adr |
121 | XRAM_ADDR_var \adr |
122 | or.l #0x40000000,d0 |
4db6e09f |
123 | .endm |
124 | |
125 | |
0fc4f06b |
126 | .macro CRAM_ADDR_var adr |
127 | XRAM_ADDR_var \adr |
128 | or.l #0xc0000000,d0 |
4db6e09f |
129 | .endm |
130 | |
131 | |
1286a1ba |
132 | # convert tile coords in d0, d1 to nametable addr to a0 |
133 | .macro XY2NT |
134 | lsl.w #6,d1 |
135 | add.w d1,d0 |
136 | lsl.w #1,d0 |
137 | movea.l #0xe000,a0 |
138 | add.w d0,a0 |
139 | .endm |
140 | |
4276cd7a |
141 | # check if some d-pad button (and modifier) is pressed |
fbad1b76 |
142 | .macro do_dpad bit op val |
143 | btst.l #\bit,d0 |
144 | beq 0f |
145 | \op.l \val,a6 |
146 | bra dpad_end |
4276cd7a |
147 | 0: |
4276cd7a |
148 | .endm |
149 | |
4dfddc2f |
150 | # convert a6 to normal addr |
151 | # destroys d0 |
152 | .macro mk_a6_addr reg |
153 | move.l a6,\reg |
154 | moveq.l #0,d0 |
155 | move.b \reg,d0 |
156 | lsr.l #8,\reg |
157 | add.l d0,\reg |
158 | .endm |
159 | |
160 | .macro change_mode mode_new mode_back |
161 | and.w #0xc0ff,d7 |
162 | or.w #(\mode_back<<11)|(\mode_new<<8),d7 |
163 | .endm |
164 | |
27d5cc88 |
165 | .macro menu_text str x y pal |
318e20ff |
166 | lea (\str,pc),a0 |
27d5cc88 |
167 | move.l #\x,d0 |
168 | move.l #\y,d1 |
169 | move.l #0x8000|(\pal<<13),d2 |
170 | jsr print |
171 | .endm |
172 | |
4db6e09f |
173 | ################################################# |
174 | # # |
175 | # DATA # |
176 | # # |
177 | ################################################# |
178 | |
179 | colors: |
4276cd7a |
180 | dc.w 0x0000,0x0eee,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
181 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
182 | dc.w 0x0000,0x02e2,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
183 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
184 | dc.w 0x0000,0x0e44,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
185 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
d4279640 |
186 | dc.w 0x0000,0x044e,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
187 | dc.w 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000 |
570c4371 |
188 | colors_end: |
189 | |
4db6e09f |
190 | |
191 | sprite_data: |
192 | /* Y size link attr X */ |
570c4371 |
193 | dc.w 0; dc.b 0x05; dc.b 0; dc.w 0x6002; dc.w 0 |
4db6e09f |
194 | sprite_data_end: |
195 | |
27d5cc88 |
196 | predef_addrs: |
197 | dc.l 0x000000, 0x200000, 0x400000, 0xa00000, 0xa10000 |
d4279640 |
198 | dc.l 0xa11100, 0xa12000, 0xa13000, 0xa14000, 0xc00000 |
27d5cc88 |
199 | predef_addrs_end: |
200 | |
201 | safe_addrs: |
202 | dc.l 0x000000, 0x7fffff |
203 | dc.l 0xe00000, 0xffffff |
d4279640 |
204 | dc.l 0xa00000, 0xa100ff |
205 | dc.l 0xa11000, 0xa113ff |
206 | dc.l 0xa12000, 0xa120ff |
207 | dc.l 0xa13000, 0xa130ff |
27d5cc88 |
208 | safe_addrs_end: |
209 | |
4dfddc2f |
210 | txt_edit: |
211 | .ascii "- edit -\0" |
212 | txt_a_confirm: |
213 | .ascii "A-confirm\0" |
27d5cc88 |
214 | txt_about: |
318e20ff |
215 | .ascii "hexed r2\0" |
27d5cc88 |
216 | txt_goto: |
217 | .ascii "Go to address\0" |
218 | txt_goto_predef: |
219 | .ascii "Go to (predef)\0" |
d90ff128 |
220 | txt_jmp_addr: |
221 | .ascii "Jump to address\0" |
27d5cc88 |
222 | txt_dtack: |
223 | .ascii "DTACK safety\0" |
d4279640 |
224 | txt_dtack_err: |
225 | .ascii "DTACK err?\0" |
226 | txt_exc: |
227 | .ascii "Exception \0" |
4dfddc2f |
228 | |
4db6e09f |
229 | ################################################## |
230 | # # |
231 | # MAIN PROGRAM # |
232 | # # |
233 | ################################################## |
27d5cc88 |
234 | |
235 | # global regs: |
236 | # a6 = page_start[31:8]|cursor_offs[7:0] |
237 | # d7 = old_inputs[31:16]|edit_bytes[15:14]|g_mode_old[13:11]|g_mode[10:8]|irq_cnt[7:0] |
238 | # d6 = edit_word_save[31:15]|edit_done[7]|no_dtack_detect[4]|autorep_cnt[3:0] |
239 | # d5 = main: tmp |
240 | # edit: edit_word[31:8]|edit_pos[4:2]|byte_cnt[1:0] |
241 | # menu: sel |
242 | |
570c4371 |
243 | .align 2 |
244 | |
4db6e09f |
245 | main: |
4276cd7a |
246 | /* mask irqs during init */ |
1286a1ba |
247 | move.w #0x2700,sr |
248 | |
318e20ff |
249 | .if RELOCATE_TO_RAM |
27d5cc88 |
250 | lea (0,pc),a0 |
251 | move.l a0,d0 |
252 | swap d0 |
318e20ff |
253 | lsr.b #4,d0 |
27d5cc88 |
254 | and.b #0x0f,d0 |
255 | cmp.b #0,d0 |
256 | bne 0f |
257 | |
318e20ff |
258 | /* copy, assume 8K size */ |
259 | move.w #0x2000/8-1,d0 |
27d5cc88 |
260 | move.l #0,a0 |
318e20ff |
261 | move.l #0xFF0100,a1 |
27d5cc88 |
262 | 1: |
318e20ff |
263 | move.l (a0)+,(a1)+ |
264 | move.l (a0)+,(a1)+ |
27d5cc88 |
265 | dbra d0,1b |
318e20ff |
266 | 0: |
267 | lea (0f,pc),a0 |
268 | add.l #0xFF0100,a0 |
269 | jmp (a0) |
27d5cc88 |
270 | 0: |
271 | .endif |
272 | |
1286a1ba |
273 | movea.l #0,a6 |
4dfddc2f |
274 | move.l #0x8000,d7 |
fbad1b76 |
275 | moveq.l #0,d6 |
1286a1ba |
276 | |
277 | /* Init pads */ |
278 | move.b #0x40,(0xa10009).l |
279 | move.b #0x40,(0xa10003).l |
280 | |
4db6e09f |
281 | /* Initialize VDP */ |
282 | jsr init_gfx |
283 | |
284 | /* Load color data */ |
0fc4f06b |
285 | movea.l #0,a0 |
318e20ff |
286 | lea (colors,pc),a1 |
0fc4f06b |
287 | moveq.l #(colors_end-colors)/2,d0 |
4db6e09f |
288 | jsr load_colors |
289 | |
d90ff128 |
290 | /* load font patterns */ |
318e20ff |
291 | movea.l #GFXDATA,a0 |
292 | lea (font,pc),a1 |
d90ff128 |
293 | VRAM_ADDR 0,(GFXCNTL) |
294 | move.w #128*8,d3 |
295 | font_loop: |
296 | moveq.l #8-1,d2 |
297 | moveq.l #0,d1 |
298 | move.b (a1)+,d0 |
299 | 0: |
300 | lsr.b #1,d0 |
301 | roxl.l #1,d1 |
302 | ror.l #5,d1 |
303 | dbra d2,0b |
304 | |
305 | rol.l #1,d1 /* fixup */ |
306 | move.l d1,(a0) |
307 | dbra d3,font_loop |
4db6e09f |
308 | |
309 | /* generate A layer map */ |
1286a1ba |
310 | movea.l #0xe000,a1 |
4db6e09f |
311 | move.l #28-1,d4 |
312 | lmaploop0: |
1286a1ba |
313 | movea.l a1,a0 |
4db6e09f |
314 | jsr load_prepare |
315 | |
570c4371 |
316 | move.l #64/2-1,d3 |
0fc4f06b |
317 | 0: move.l #0x00000000,(a0) |
4db6e09f |
318 | dbra d3,0b |
319 | |
1286a1ba |
320 | add.l #64*2,a1 |
4db6e09f |
321 | dbra d4,lmaploop0 |
322 | |
323 | /* generate B layer map */ |
0fc4f06b |
324 | movea.l #0xc000,a0 |
4db6e09f |
325 | jsr load_prepare |
326 | |
570c4371 |
327 | move.l #64*28/2-1,d3 |
0fc4f06b |
328 | 0: move.l #0x00000000,(a0) |
4db6e09f |
329 | dbra d3,0b |
330 | |
331 | /* upload sprite data */ |
0fc4f06b |
332 | movea.l #0xfc00,a0 |
4db6e09f |
333 | jsr load_prepare |
318e20ff |
334 | lea (sprite_data,pc),a1 |
4db6e09f |
335 | |
336 | move.l #(sprite_data_end-sprite_data)/2-1,d3 |
0fc4f06b |
337 | 0: move.l (a1)+,(a0) |
4db6e09f |
338 | dbra d3,0b |
339 | |
318e20ff |
340 | .if USE_VINT |
d4279640 |
341 | /* wait for vsync before unmask */ |
318e20ff |
342 | jsr wait_vsync_poll |
d4279640 |
343 | |
74d5977b |
344 | /* wait a bit to avoid nested vint */ |
345 | move.w #20,d0 |
346 | 0: |
347 | dbra d0,0b /* 10 cycles to go back */ |
348 | |
318e20ff |
349 | /* enable and unmask vint */ |
350 | write_vdp_r_dst 1,(VDP1_E_VBI | VDP1_E_DISPLAY | VDP1_MODE5),(GFXCNTL) |
74d5977b |
351 | move.w #0x2000,sr |
318e20ff |
352 | .endif |
570c4371 |
353 | |
4db6e09f |
354 | ################################################## |
1286a1ba |
355 | |
4db6e09f |
356 | forever: |
318e20ff |
357 | .if USE_VINT |
4db6e09f |
358 | jsr wait_vsync |
318e20ff |
359 | .else |
360 | jsr wait_vsync_poll |
361 | jsr VBL |
362 | .endif |
4db6e09f |
363 | bra forever |
4db6e09f |
364 | |
365 | |
d4279640 |
366 | INT: |
367 | /* let's hope VRAM is already set up.. */ |
318e20ff |
368 | lea (txt_exc,pc),a0 |
d4279640 |
369 | move.l #9,d0 |
370 | move.l #27,d1 |
371 | move.l #0xe000,d2 |
372 | jsr print |
373 | bra forever |
374 | |
375 | ################################################## |
376 | |
1286a1ba |
377 | VBL: |
fbad1b76 |
378 | addq.b #1,d7 |
d90ff128 |
379 | # movem.l d0-d4/a0-a5,-(a7) |
1286a1ba |
380 | |
fbad1b76 |
381 | moveq.l #0,d0 |
382 | move.w d7,d0 |
383 | lsr.w #6,d0 |
384 | and.w #0x1c,d0 |
318e20ff |
385 | lea (jumptab,pc,d0),a0 |
fbad1b76 |
386 | jmp (a0) |
387 | jumptab: |
318e20ff |
388 | bra mode_main |
389 | bra mode_val_input |
390 | bra mode_edit_val /* edit val in editor */ |
391 | bra mode_goto |
392 | bra mode_start_menu |
393 | bra mode_goto_predef |
394 | bra mode_jmp_addr |
395 | bra mode_main |
fbad1b76 |
396 | |
397 | ##################### main ####################### |
398 | |
399 | mode_main: |
d4279640 |
400 | /* assume we will hang */ |
318e20ff |
401 | lea (txt_dtack_err,pc),a0 |
d4279640 |
402 | move.l #9,d0 |
403 | move.l #27,d1 |
404 | move.l #0xe000,d2 |
405 | jsr print |
406 | |
407 | moveq.l #0,d1 |
1286a1ba |
408 | move.l a6,d0 |
4276cd7a |
409 | move.b d0,d1 |
1286a1ba |
410 | lsr.l #8,d0 |
411 | move.l d0,a1 /* current addr */ |
4276cd7a |
412 | lsr.b #3,d1 |
413 | neg.b d1 |
414 | add.b #27-1,d1 /* line where the cursor sits */ |
415 | swap d1 |
1286a1ba |
416 | |
27d5cc88 |
417 | movea.l #0xe002,a2 |
4276cd7a |
418 | move.l #27-1,d5 /* line counter for dbra */ |
419 | or.l d1,d5 |
1286a1ba |
420 | |
27d5cc88 |
421 | draw_row: |
1286a1ba |
422 | move.l a2,a0 |
423 | jsr load_prepare |
424 | |
27d5cc88 |
425 | btst.l #15,d7 |
426 | beq 0f |
427 | move.w #' ',(a0) |
428 | 0: |
1286a1ba |
429 | /* addr */ |
430 | move.l a1,d2 |
431 | moveq.l #6,d3 |
432 | jsr print_hex_preped |
433 | |
27d5cc88 |
434 | btst.l #4,d6 |
435 | bne draw_row_safe |
436 | |
d4279640 |
437 | bsr get_safety_mask |
438 | cmp.b #0xf,d0 |
439 | beq draw_row_safe |
27d5cc88 |
440 | |
d4279640 |
441 | # unsafe or partially safe |
442 | draw_row_hsafe: |
443 | move.l d0,d4 |
444 | swap d4 /* mask in upper word */ |
27d5cc88 |
445 | btst.l #15,d7 |
d4279640 |
446 | bne draw_row_hsafe_words_pre |
27d5cc88 |
447 | |
d4279640 |
448 | draw_row_hsafe_bytes_pre: |
27d5cc88 |
449 | /* 8 bytes */ |
d4279640 |
450 | moveq.l #2,d3 |
451 | move.w #3,d4 |
452 | |
453 | draw_row_hsafe_bytes: |
27d5cc88 |
454 | move.w #' ',(a0) |
d4279640 |
455 | move.b d4,d0 |
456 | add.b #16,d0 |
457 | btst.l d0,d4 |
458 | bne 0f |
27d5cc88 |
459 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
460 | move.w #' ',(a0) |
461 | move.l #'?'|('?'<<16),(a0) |
462 | bra 1f |
463 | 0: |
464 | move.b (0,a1),d2 |
465 | jsr print_hex_preped |
466 | move.w #' ',(a0) |
467 | move.b (1,a1),d2 |
468 | jsr print_hex_preped |
469 | 1: |
470 | addq.l #2,a1 |
471 | dbra d4,draw_row_hsafe_bytes |
27d5cc88 |
472 | |
473 | move.w #' ',(a0) |
474 | |
475 | move.l d5,d0 |
476 | swap d0 |
477 | cmp.w d5,d0 |
478 | beq draw_cursor_unsafe_byte |
d4279640 |
479 | bra draw_chars_hsafe_pre |
27d5cc88 |
480 | |
d4279640 |
481 | draw_row_hsafe_words_pre: |
27d5cc88 |
482 | /* 4 shorts */ |
d4279640 |
483 | moveq.l #4,d3 |
484 | move.w #3,d4 |
485 | |
486 | draw_row_hsafe_words: |
27d5cc88 |
487 | move.w #' ',(a0) |
d4279640 |
488 | move.b d4,d0 |
489 | add.b #16,d0 |
490 | btst.l d0,d4 |
491 | bne 0f |
27d5cc88 |
492 | move.l #'?'|('?'<<16),(a0) |
493 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
494 | bra 1f |
495 | 0: |
496 | move.w (a1),d2 |
497 | jsr print_hex_preped |
498 | 1: |
499 | addq.l #2,a1 |
500 | dbra d4,draw_row_hsafe_words |
27d5cc88 |
501 | |
502 | move.l #(' '<<16)|' ',(a0) |
503 | |
504 | move.l d5,d0 |
505 | swap d0 |
506 | cmp.w d5,d0 |
507 | beq draw_cursor_unsafe_word |
508 | |
d4279640 |
509 | draw_chars_hsafe_pre: |
510 | subq.l #8,a1 |
511 | move.w #3,d4 |
512 | moveq.l #0,d0 |
513 | |
514 | draw_chars_hsafe: |
515 | move.b d4,d0 |
516 | add.b #16,d0 |
517 | btst.l d0,d4 |
518 | bne 0f |
27d5cc88 |
519 | move.l #'?'|('?'<<16),(a0) |
d4279640 |
520 | bra draw_chars_hsafe_next |
521 | 0: |
522 | btst.l #15,d7 /* must perform correct read type */ |
523 | bne 0f /* doing byte reads on security reg hangs */ |
524 | move.b (0,a1),d0 |
525 | lsl.l #8,d0 |
526 | move.b (1,a1),d0 |
527 | bra 1f |
528 | 0: |
529 | move.w (a1),d0 |
530 | 1: |
531 | ror.l #8,d0 |
532 | move.b d0,d1 |
533 | sub.b #0x20,d1 |
534 | cmp.b #0x60,d1 |
535 | blo 0f |
536 | move.b #'.',d0 |
537 | 0: |
538 | move.w d0,(a0) |
539 | |
540 | move.b #0,d0 |
541 | rol.l #8,d0 |
542 | move.b d0,d1 |
543 | sub.b #0x20,d1 |
544 | cmp.b #0x60,d1 |
545 | blo 0f |
546 | move.b #'.',d0 |
547 | 0: |
548 | move.w d0,(a0) |
549 | |
550 | draw_chars_hsafe_next: |
551 | addq.l #2,a1 |
552 | dbra d4,draw_chars_hsafe |
27d5cc88 |
553 | |
554 | move.l #(' '<<16)|' ',(a0) |
27d5cc88 |
555 | add.w #0x80,a2 |
556 | dbra d5,draw_row |
557 | bra draw_status_bar |
558 | |
559 | |
560 | # normal draw |
561 | draw_row_safe: |
562 | btst.l #15,d7 |
563 | bne draw_row_words |
564 | |
565 | draw_row_bytes: |
566 | /* 8 bytes */ |
567 | moveq.l #2,d3 |
568 | moveq.l #8-1,d4 |
569 | draw_bytes: |
570 | move.w #' ',(a0) |
571 | move.b (a1)+,d2 |
572 | jsr print_hex_preped |
573 | dbra d4,draw_bytes |
574 | |
575 | move.w #' ',(a0) |
576 | |
577 | move.l d5,d0 |
578 | swap d0 |
579 | cmp.w d5,d0 |
580 | beq draw_cursor_byte |
581 | bra draw_chars_pre |
582 | |
583 | draw_row_words: |
1286a1ba |
584 | /* 4 shorts */ |
4276cd7a |
585 | moveq.l #4,d3 |
1286a1ba |
586 | moveq.l #4-1,d4 |
27d5cc88 |
587 | draw_words: |
1286a1ba |
588 | move.w #' ',(a0) |
589 | move.w (a1)+,d2 |
1286a1ba |
590 | jsr print_hex_preped |
27d5cc88 |
591 | dbra d4,draw_words |
592 | |
593 | move.l #(' '<<16)|' ',(a0) |
1286a1ba |
594 | |
4276cd7a |
595 | move.l d5,d0 |
596 | swap d0 |
597 | cmp.w d5,d0 |
27d5cc88 |
598 | beq draw_cursor_word |
4276cd7a |
599 | |
600 | draw_chars_pre: |
1286a1ba |
601 | /* 8 chars */ |
602 | subq.l #8,a1 |
603 | moveq.l #8-1,d4 |
604 | draw_chars: |
605 | move.b (a1)+,d0 |
606 | move.b d0,d1 |
607 | sub.b #0x20,d1 |
608 | cmp.b #0x60,d1 |
609 | blo 0f |
610 | move.w #'.',d0 |
611 | 0: |
612 | move.w d0,(a0) |
613 | dbra d4,draw_chars |
614 | |
27d5cc88 |
615 | move.l #(' '<<16)|' ',(a0) |
616 | |
1286a1ba |
617 | add.w #0x80,a2 |
27d5cc88 |
618 | dbra d5,draw_row |
1286a1ba |
619 | |
d4279640 |
620 | |
27d5cc88 |
621 | draw_status_bar: |
4276cd7a |
622 | /* status bar */ |
27d5cc88 |
623 | move.l a2,a0 |
4276cd7a |
624 | jsr load_prepare |
27d5cc88 |
625 | |
626 | btst.l #15,d7 |
627 | beq 0f |
628 | move.w #' ',(a0) |
629 | 0: |
4dfddc2f |
630 | mk_a6_addr d2 |
4276cd7a |
631 | move.l #0x4006,d3 |
632 | jsr print_hex_preped |
d4279640 |
633 | |
634 | /* clear error */ |
635 | moveq.l #5-1,d0 |
636 | 0: |
637 | move.l #' '|(' '<<16),(a0) |
638 | move.l #' '|(' '<<16),(a0) |
639 | dbra d0,0b |
640 | |
4276cd7a |
641 | |
1286a1ba |
642 | /* handle input */ |
643 | jsr get_input /* x0cbrldu x1sa00du */ |
1286a1ba |
644 | |
fbad1b76 |
645 | btst.l #16+4,d0 /* A - scroll modifier */ |
646 | beq input_noa |
647 | |
648 | do_dpad 16+0, sub, #0x0800 |
649 | do_dpad 16+1, add, #0x0800 |
650 | do_dpad 16+10, sub, #0xd800 |
651 | do_dpad 16+11, add, #0xd800 |
652 | input_noa: |
653 | moveq.l #0,d1 |
4dfddc2f |
654 | move.w d7,d1 |
655 | lsr.w #7,d1 |
656 | lsr.w #7,d1 |
fbad1b76 |
657 | |
658 | do_dpad 0, subq, #0x0008 |
659 | do_dpad 1, addq, #0x0008 |
660 | do_dpad 10, sub, d1 |
661 | do_dpad 11, add, d1 |
662 | |
663 | dpad_end: |
4dfddc2f |
664 | /* update addr */ |
665 | move.l a6,d1 |
666 | cmp.b #0xf0,d1 |
667 | blo 0f |
668 | sub.l #0xd800,a6 |
669 | add.w #0x00d8,a6 |
670 | bra 1f |
671 | 0: |
672 | cmp.b #0xd8,d1 |
673 | blo 1f |
674 | add.l #0xd800,a6 |
675 | sub.w #0x00d8,a6 |
676 | 1: |
677 | |
678 | /* other btns */ |
fbad1b76 |
679 | moveq.l #0,d1 |
680 | btst.l #12,d0 /* B - switch byte/word mode */ |
681 | beq input_nob |
4dfddc2f |
682 | bclr.l #15,d7 |
683 | add.w #0x4000,d7 /* changes between 01 10 */ |
fbad1b76 |
684 | move.l a6,d1 |
685 | and.l #1,d1 |
686 | sub.l d1,a6 /* make even, just in case */ |
687 | |
688 | input_nob: |
689 | btst.l #13,d0 /* C - edit selected byte */ |
690 | beq input_noc |
4dfddc2f |
691 | |
692 | change_mode MMODE_EDIT_VAL, MMODE_MAIN |
27d5cc88 |
693 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
fbad1b76 |
694 | |
695 | input_noc: |
27d5cc88 |
696 | btst.l #5,d0 /* Start - menu */ |
4dfddc2f |
697 | beq input_nos |
698 | |
27d5cc88 |
699 | moveq.l #0,d5 |
700 | change_mode MMODE_START_MENU, MMODE_MAIN |
701 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL) |
1286a1ba |
702 | |
4dfddc2f |
703 | input_nos: |
fbad1b76 |
704 | vbl_end: |
d90ff128 |
705 | # movem.l (a7)+,d0-d4/a0-a5 |
318e20ff |
706 | .if USE_VINT |
1286a1ba |
707 | rte |
318e20ff |
708 | .else |
709 | rts |
710 | .endif |
1286a1ba |
711 | |
712 | |
27d5cc88 |
713 | draw_cursor_unsafe_byte: |
714 | move.l a6,d0 |
715 | and.l #7,d0 /* byte offs */ |
716 | move.b d0,d1 |
717 | add.b d0,d0 |
718 | add.b d1,d0 /* d0 *= 3 (chars) */ |
719 | add.b d0,d0 |
720 | lea (7*2,a2,d0),a0 |
721 | jsr load_prepare |
722 | move.l #(0x2000|'?'|((0x2000|'?')<<16)),(a0) |
723 | |
724 | move.l a2,a0 |
725 | add.w #31*2,a0 |
726 | jsr load_prepare /* restore a0 */ |
318e20ff |
727 | bra draw_chars_hsafe_pre |
27d5cc88 |
728 | |
729 | draw_cursor_unsafe_word: |
4276cd7a |
730 | move.l a6,d0 |
731 | and.l #7,d0 /* byte offs */ |
732 | move.l d0,d1 |
733 | lsr.b #1,d1 /* which word */ |
734 | move.b d1,d2 |
735 | lsl.b #2,d2 |
736 | add.b d2,d1 /* num of chars to skip */ |
27d5cc88 |
737 | add.b d1,d1 |
738 | |
739 | lea (8*2,a2,d1),a0 |
740 | jsr load_prepare |
741 | move.l #(0x2000|'?'|((0x2000|'?')<<16)),d0 |
742 | move.l d0,(a0) |
743 | move.l d0,(a0) |
744 | |
745 | move.l a2,a0 |
746 | add.w #29*2,a0 |
747 | jsr load_prepare /* restore a0 */ |
318e20ff |
748 | bra draw_chars_hsafe_pre |
4276cd7a |
749 | |
4276cd7a |
750 | |
fbad1b76 |
751 | draw_cursor_byte: |
27d5cc88 |
752 | move.l a6,d0 |
753 | and.l #7,d0 /* byte offs */ |
754 | move.w #0x2002,d3 |
755 | |
fbad1b76 |
756 | move.b (-8,a1,d0),d2 |
27d5cc88 |
757 | move.b d0,d1 |
758 | add.b d0,d0 |
759 | add.b d1,d0 /* d0 *= 3 (chars) */ |
760 | add.b d0,d0 |
761 | lea (7*2,a2,d0),a0 |
762 | jsr load_prepare |
763 | jsr print_hex_preped |
764 | |
765 | move.l a2,a0 |
766 | add.w #31*2,a0 |
767 | jsr load_prepare /* restore a0 */ |
768 | |
318e20ff |
769 | bra draw_chars_pre |
fbad1b76 |
770 | |
771 | draw_cursor_word: |
27d5cc88 |
772 | move.l a6,d0 |
773 | and.l #7,d0 /* byte offs */ |
774 | move.l d0,d1 |
775 | lsr.b #1,d1 /* which word */ |
776 | move.b d1,d2 |
777 | lsl.b #2,d2 |
778 | add.b d2,d1 /* num of chars to skip */ |
779 | add.b d1,d1 |
780 | move.w #0x2004,d3 |
781 | |
fbad1b76 |
782 | move.w (-8,a1,d0),d2 |
27d5cc88 |
783 | lea (8*2,a2,d1),a0 |
4276cd7a |
784 | jsr load_prepare |
4276cd7a |
785 | jsr print_hex_preped |
786 | |
787 | move.l a2,a0 |
27d5cc88 |
788 | add.w #29*2,a0 |
4276cd7a |
789 | jsr load_prepare /* restore a0 */ |
790 | |
318e20ff |
791 | bra draw_chars_pre |
4276cd7a |
792 | |
793 | |
4dfddc2f |
794 | #################### hedit ####################### |
795 | |
796 | mode_edit_val: |
797 | btst.l #7,d6 |
798 | bne mode_hedit_finish |
799 | |
800 | /* read val to edit */ |
5f6473d9 |
801 | moveq.l #0,d5 |
4dfddc2f |
802 | mk_a6_addr d1 |
803 | move.l d1,a0 |
4dfddc2f |
804 | btst.l #15,d7 |
805 | bne 0f |
5f6473d9 |
806 | move.b (a0),d5 |
807 | lsl.l #8,d5 |
808 | or.b #1,d5 |
4dfddc2f |
809 | bra 1f |
810 | 0: |
5f6473d9 |
811 | move.w (a0),d5 |
812 | lsl.l #8,d5 |
813 | or.b #2,d5 |
4dfddc2f |
814 | 1: |
4dfddc2f |
815 | |
4dfddc2f |
816 | change_mode MMODE_VAL_INPUT, MMODE_EDIT_VAL |
318e20ff |
817 | bra vbl_end |
4dfddc2f |
818 | |
819 | mode_hedit_finish: |
820 | /* write the val */ |
821 | mk_a6_addr d1 |
822 | move.l d1,a0 |
5f6473d9 |
823 | lsr.l #8,d5 |
4dfddc2f |
824 | |
825 | btst.l #15,d7 |
826 | bne 0f |
5f6473d9 |
827 | move.b d5,(a0) |
4dfddc2f |
828 | bra 1f |
829 | 0: |
5f6473d9 |
830 | move.w d5,(a0) |
4dfddc2f |
831 | 1: |
832 | |
4dfddc2f |
833 | bra return_to_main |
834 | |
835 | ##################### goto ####################### |
836 | |
837 | mode_goto: |
838 | btst.l #7,d6 |
839 | bne mode_goto_finish |
fbad1b76 |
840 | |
5f6473d9 |
841 | moveq.l #0,d5 |
842 | swap d6 |
843 | move.w d6,d5 |
844 | swap d6 |
845 | swap d5 |
846 | or.b #3,d5 /* 3 bytes */ |
4dfddc2f |
847 | bclr.l #7,d6 |
848 | change_mode MMODE_VAL_INPUT, MMODE_GOTO |
318e20ff |
849 | bra vbl_end |
4dfddc2f |
850 | |
851 | mode_goto_finish: |
5f6473d9 |
852 | lsr.l #8,d5 |
853 | move.l d5,d0 |
4dfddc2f |
854 | move.l d0,d1 |
855 | and.l #7,d1 |
856 | and.b #0xf8,d0 |
857 | lsl.l #8,d0 |
858 | or.l d1,d0 |
859 | move.l d0,a6 |
860 | |
5f6473d9 |
861 | lsr.l #8,d5 |
862 | swap d6 |
863 | move.w d5,d6 |
864 | swap d6 |
865 | |
4dfddc2f |
866 | bra return_to_main |
867 | |
868 | ################### val edit ##################### |
869 | |
870 | mode_val_input: |
871 | /* frame */ |
872 | movea.l #0xe000+14*2+11*64*2,a1 |
873 | moveq.l #6-1,d1 |
874 | 0: |
875 | move.w a1,a0 |
876 | jsr load_prepare |
877 | moveq.l #11-1,d0 |
878 | 1: |
879 | move.w #0,(a0) |
880 | dbra d0,1b |
881 | |
882 | add.w #64*2,a1 |
883 | dbra d1,0b |
884 | |
885 | /* text */ |
318e20ff |
886 | lea (txt_edit,pc),a0 |
4dfddc2f |
887 | move.l #15,d0 |
888 | move.l #11,d1 |
889 | move.l #0xc000,d2 |
890 | jsr print |
891 | |
318e20ff |
892 | lea (txt_a_confirm,pc),a0 |
4dfddc2f |
893 | move.l #15,d0 |
894 | move.l #15,d1 |
895 | move.l #0xc000,d2 |
896 | jsr print |
897 | |
898 | /* edit field */ |
899 | moveq.l #0,d0 |
900 | moveq.l #0,d1 |
901 | moveq.l #0,d3 |
5f6473d9 |
902 | move.b d5,d3 |
903 | and.b #3,d3 /* edit field bytes */ |
4dfddc2f |
904 | |
905 | move.b #19,d0 |
906 | sub.b d3,d0 |
907 | move.b #13,d1 |
5f6473d9 |
908 | move.l d5,d2 |
4dfddc2f |
909 | lsr.l #8,d2 |
910 | add.b d3,d3 |
911 | or.w #0x8000,d3 |
912 | jsr print_hex |
913 | |
914 | /* current char */ |
915 | moveq.l #0,d0 |
916 | moveq.l #0,d1 |
917 | |
918 | and.w #6,d3 |
919 | move.b #19,d0 |
920 | move.b d3,d1 |
921 | lsr.b #1,d1 /* length in bytes */ |
922 | sub.b d1,d0 |
5f6473d9 |
923 | move.b d5,d1 |
924 | lsr.b #2,d1 |
4dfddc2f |
925 | and.b #7,d1 /* nibble to edit */ |
926 | add.b d1,d0 |
927 | |
928 | sub.b d1,d3 |
929 | sub.b #1,d3 /* chars to shift out */ |
930 | lsl.b #2,d3 |
931 | add.b #8,d3 |
5f6473d9 |
932 | move.l d5,d2 |
4dfddc2f |
933 | lsr.l d3,d2 |
934 | |
935 | move.b #13,d1 |
936 | move.w #0xa001,d3 |
937 | jsr print_hex |
938 | |
939 | /* handle input */ |
940 | jsr get_input /* x0cbrldu x1sa00du */ |
941 | |
942 | move.w d0,d1 |
943 | and.w #0x0f00,d1 |
944 | beq ai_no_dpad |
5f6473d9 |
945 | move.b d5,d1 |
946 | and.b #3,d1 |
4dfddc2f |
947 | add.b d1,d1 /* nibble count */ |
948 | sub.b #1,d1 /* max n.t.e. val */ |
5f6473d9 |
949 | move.b d5,d2 |
950 | lsr.b #2,d2 |
4dfddc2f |
951 | and.b #7,d2 /* nibble to edit */ |
952 | |
953 | move.b d0,d3 |
954 | and.b #3,d3 |
955 | beq ai_no_ud |
956 | moveq.l #0,d3 |
957 | moveq.l #0,d4 |
958 | move.b #0xf,d3 |
959 | move.b #0x1,d4 |
960 | sub.b d2,d1 |
961 | lsl.b #2,d1 |
962 | add.b #8,d1 |
963 | lsl.l d1,d3 /* mask */ |
964 | lsl.l d1,d4 /* what to add/sub */ |
5f6473d9 |
965 | move.l d5,d1 |
4dfddc2f |
966 | and.l d3,d1 |
967 | btst.l #8,d0 |
968 | beq 0f |
969 | add.l d4,d1 |
970 | bra 1f |
971 | 0: |
972 | sub.l d4,d1 |
973 | 1: |
974 | and.l d3,d1 |
975 | eor.l #0xffffffff,d3 |
5f6473d9 |
976 | and.l d3,d5 |
977 | or.l d1,d5 |
318e20ff |
978 | bra vbl_end |
4dfddc2f |
979 | |
980 | ai_no_ud: |
981 | btst.l #10,d0 |
982 | bne 0f |
983 | add.b #1,d2 |
984 | bra 1f |
985 | 0: |
986 | sub.b #1,d2 |
987 | 1: |
988 | cmp.b #0,d2 |
989 | bge 0f |
990 | move.b d1,d2 |
991 | 0: |
992 | cmp.b d1,d2 |
993 | ble 0f |
994 | move.b #0,d2 |
995 | 0: |
5f6473d9 |
996 | and.b #0xe3,d5 |
997 | lsl.b #2,d2 |
998 | or.b d2,d5 |
318e20ff |
999 | bra vbl_end |
4dfddc2f |
1000 | |
1001 | ai_no_dpad: |
1002 | move.w d0,d1 |
1003 | and.w #0x1020,d1 |
1004 | beq ai_no_sb |
1005 | |
4dfddc2f |
1006 | bra return_to_main |
1007 | |
1008 | ai_no_sb: |
5f6473d9 |
1009 | btst.l #4,d0 /* A - confirm */ |
4dfddc2f |
1010 | beq ai_no_input |
1011 | bset.l #7,d6 |
5f6473d9 |
1012 | move.w d7,d1 /* back to prev mode */ |
4dfddc2f |
1013 | and.w #0x3800,d1 |
1014 | lsr.w #3,d1 |
1015 | and.w #0xc0ff,d7 |
1016 | or.w d1,d7 |
1017 | |
1018 | ai_no_input: |
318e20ff |
1019 | bra vbl_end |
4dfddc2f |
1020 | |
1021 | |
27d5cc88 |
1022 | ################### start menu ################### |
1023 | |
1024 | mode_start_menu: |
1025 | /* frame */ |
1026 | bsr start_menu_box |
1027 | |
1028 | /* text */ |
1029 | menu_text txt_about, 13, 9, 1 |
1030 | menu_text txt_goto, 13, 11, 0 |
1031 | menu_text txt_goto_predef, 13, 12, 0 |
d90ff128 |
1032 | menu_text txt_jmp_addr, 13, 13, 0 |
1033 | menu_text txt_dtack, 13, 14, 0 |
1034 | menu_text txt_a_confirm, 13, 16, 2 |
27d5cc88 |
1035 | |
1036 | /* dtack safety on/off */ |
d90ff128 |
1037 | movea.l #0xe000+26*2+14*64*2,a0 |
27d5cc88 |
1038 | jsr load_prepare |
1039 | move.w #0x8000|'O',(a0) |
1040 | btst.l #4,d6 |
1041 | bne 0f |
1042 | move.w #0x8000|'N',(a0) |
1043 | bra 1f |
1044 | 0: |
1045 | move.w #0x8000|'F',(a0) |
1046 | move.w #0x8000|'F',(a0) |
1047 | 1: |
1048 | |
1049 | /* cursor */ |
1050 | movea.l #0xe000+11*2+11*64*2,a0 |
1051 | moveq.l #0,d0 |
1052 | move.b d5,d0 |
1053 | and.b #3,d0 |
1054 | lsl.w #7,d0 |
1055 | add.w d0,a0 |
1056 | jsr load_prepare |
1057 | move.w #'>',(a0) |
1058 | |
1059 | /* input */ |
1060 | jsr get_input /* x0cbrldu x1sa00du */ |
1061 | |
1062 | move.w d0,d1 |
1063 | and.w #3,d1 |
1064 | beq msm_no_ud |
1065 | move.b d5,d1 |
1066 | and.b #3,d1 |
1067 | btst.l #0,d0 |
1068 | sne d2 |
1069 | or.b #1,d2 /* up -1, down 1 */ |
1070 | add.b d2,d1 |
1071 | cmp.b #0,d1 |
1072 | bge 0f |
d90ff128 |
1073 | move.b #3,d1 |
27d5cc88 |
1074 | 0: |
d90ff128 |
1075 | cmp.b #3,d1 |
27d5cc88 |
1076 | ble 0f |
1077 | move.b #0,d1 |
1078 | 0: |
1079 | and.b #0xfc,d5 |
1080 | or.b d1,d5 |
318e20ff |
1081 | bra vbl_end |
27d5cc88 |
1082 | |
1083 | msm_no_ud: |
1084 | btst.l #4,d0 /* A - confirm */ |
1085 | beq msm_no_a |
1086 | move.b d5,d1 |
1087 | and.b #3,d1 |
1088 | bne 0f |
1089 | change_mode MMODE_GOTO, MMODE_MAIN |
1090 | bsr start_menu_box |
318e20ff |
1091 | bra vbl_end |
27d5cc88 |
1092 | 0: |
1093 | cmp.b #1,d1 |
1094 | bne 0f |
1095 | moveq.l #0,d5 |
1096 | change_mode MMODE_GOTO_PREDEF, MMODE_MAIN |
1097 | bsr start_menu_box |
318e20ff |
1098 | bra vbl_end |
27d5cc88 |
1099 | 0: |
1100 | cmp.b #2,d1 |
1101 | bne 0f |
d90ff128 |
1102 | change_mode MMODE_JMP_ADDR, MMODE_MAIN |
1103 | bsr start_menu_box |
318e20ff |
1104 | bra vbl_end |
d90ff128 |
1105 | 0: |
1106 | cmp.b #3,d1 |
1107 | bne 0f |
27d5cc88 |
1108 | bchg.l #4,d6 |
318e20ff |
1109 | bra vbl_end |
27d5cc88 |
1110 | 0: |
1111 | |
1112 | msm_no_a: |
1113 | move.w d0,d1 |
1114 | and.w #0x3000,d1 |
1115 | beq msm_no_bc |
1116 | bra return_to_main |
1117 | |
1118 | msm_no_bc: |
318e20ff |
1119 | bra vbl_end |
27d5cc88 |
1120 | |
1121 | start_menu_box: |
1122 | movea.l #0xe000+10*2+8*64*2,a1 |
d90ff128 |
1123 | move.w #10-1,d1 |
27d5cc88 |
1124 | 0: |
1125 | move.w a1,a0 |
1126 | jsr load_prepare |
1127 | move.w #20-1,d0 |
1128 | 1: |
1129 | move.w #0,(a0) |
1130 | dbra d0,1b |
1131 | |
1132 | add.w #64*2,a1 |
1133 | dbra d1,0b |
1134 | rts |
1135 | |
1136 | ################### goto predef ################## |
1137 | |
1138 | mode_goto_predef: |
1139 | /* frame */ |
1140 | movea.l #0xe000+14*2+8*64*2,a1 |
1141 | move.l #predef_addr_cnt+2-1,d1 |
1142 | 0: |
1143 | move.w a1,a0 |
1144 | jsr load_prepare |
1145 | moveq.l #10-1,d0 |
1146 | 1: |
1147 | move.w #0,(a0) |
1148 | dbra d0,1b |
1149 | |
1150 | add.w #64*2,a1 |
1151 | dbra d1,0b |
1152 | |
1153 | /* draw addresses */ |
1154 | movea.l #0xe000+17*2+9*64*2,a1 |
318e20ff |
1155 | lea (predef_addrs,pc),a2 |
27d5cc88 |
1156 | move.w #predef_addr_cnt-1,d4 |
1157 | move.l #0x8006,d3 |
1158 | mgp_da_loop: |
1159 | move.w a1,a0 |
1160 | jsr load_prepare |
1161 | move.l (a2)+,d2 |
1162 | jsr print_hex_preped |
1163 | add.w #64*2,a1 |
1164 | dbra d4,mgp_da_loop |
1165 | |
1166 | /* cursor */ |
1167 | movea.l #0xe000+15*2+9*64*2,a0 |
1168 | moveq.l #0,d0 |
1169 | move.b d5,d0 |
1170 | lsl.w #7,d0 |
1171 | add.w d0,a0 |
1172 | jsr load_prepare |
1173 | move.w #'>',(a0) |
1174 | |
1175 | /* input */ |
1176 | jsr get_input /* x0cbrldu x1sa00du */ |
1177 | |
1178 | move.w d0,d1 |
1179 | and.w #3,d1 |
1180 | beq mgp_no_ud |
1181 | btst.l #0,d0 |
1182 | sne d2 |
1183 | or.b #1,d2 /* up -1, down 1 */ |
1184 | add.b d2,d5 |
1185 | cmp.b #0,d5 |
1186 | bge 0f |
1187 | move.b #predef_addr_cnt-1,d5 |
1188 | 0: |
1189 | cmp.b #predef_addr_cnt-1,d5 |
1190 | ble 0f |
1191 | move.b #0,d5 |
1192 | 0: |
318e20ff |
1193 | bra vbl_end |
27d5cc88 |
1194 | |
1195 | mgp_no_ud: |
1196 | btst.l #4,d0 /* A - confirm */ |
1197 | beq mgp_no_a |
1198 | moveq.l #0,d0 |
1199 | move.b d5,d0 |
1200 | lsl.w #2,d0 |
318e20ff |
1201 | lea (predef_addrs,pc),a0 |
27d5cc88 |
1202 | move.l (a0,d0),d5 |
1203 | lsl.l #8,d5 |
318e20ff |
1204 | bra mode_goto_finish |
27d5cc88 |
1205 | |
1206 | mgp_no_a: |
1207 | move.w d0,d1 |
1208 | and.w #0x3000,d1 |
1209 | beq mgp_no_bc |
1210 | bra return_to_main |
1211 | |
1212 | mgp_no_bc: |
318e20ff |
1213 | bra vbl_end |
27d5cc88 |
1214 | |
d90ff128 |
1215 | ##################### jmp ######################## |
1216 | |
1217 | mode_jmp_addr: |
1218 | btst.l #7,d6 |
1219 | bne mode_jmp_finish |
1220 | |
1221 | moveq.l #0,d5 |
1222 | or.b #3,d5 /* 3 bytes */ |
1223 | bclr.l #7,d6 |
1224 | change_mode MMODE_VAL_INPUT, MMODE_JMP_ADDR |
318e20ff |
1225 | bra vbl_end |
d90ff128 |
1226 | |
1227 | mode_jmp_finish: |
1228 | lsr.l #8,d5 |
1229 | write_vdp_r_dst 1,(VDP1_E_DISPLAY | VDP1_MODE5),(GFXCNTL) /* disable vint */ |
1230 | move.l d5,a0 |
1231 | jmp (a0) |
1232 | |
27d5cc88 |
1233 | |
4dfddc2f |
1234 | # go back to main mode |
1235 | return_to_main: |
5f6473d9 |
1236 | bclr.l #7,d6 /* not edited */ |
4dfddc2f |
1237 | change_mode MMODE_MAIN, MMODE_MAIN |
27d5cc88 |
1238 | write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320),(GFXCNTL) |
318e20ff |
1239 | bra vbl_end |
fbad1b76 |
1240 | |
1241 | |
4db6e09f |
1242 | ################################################# |
1243 | # # |
1244 | # Initialize VDP registers # |
1245 | # # |
1246 | ################################################# |
1247 | |
1248 | init_gfx: |
1249 | move.l #GFXCNTL,a3 |
570c4371 |
1250 | write_vdp_reg 0,(VDP0_E_DISPLAY | VDP0_PLTT_FULL) |
318e20ff |
1251 | write_vdp_reg 1,(VDP1_E_DISPLAY | VDP1_MODE5) |
4db6e09f |
1252 | write_vdp_reg 2,(0xe000 >> 10) /* Screen map a adress */ |
1253 | write_vdp_reg 3,(0xe000 >> 10) /* Window address */ |
1254 | write_vdp_reg 4,(0xc000 >> 13) /* Screen map b address */ |
1255 | write_vdp_reg 5,(0xfc00 >> 9) /* Sprite address */ |
1256 | write_vdp_reg 6,0 |
570c4371 |
1257 | write_vdp_reg 7,0 /* Backdrop color */ |
4db6e09f |
1258 | write_vdp_reg 10,1 /* Lines per hblank interrupt */ |
1259 | write_vdp_reg 11,0 /* 2-cell vertical scrolling */ |
570c4371 |
1260 | write_vdp_reg 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320) |
1261 | write_vdp_reg 13,(0x8000 >> 10) /* Horizontal scroll address */ |
4db6e09f |
1262 | write_vdp_reg 15,2 |
570c4371 |
1263 | write_vdp_reg 16,(VDP16_MAP_V32 | VDP16_MAP_H64) /* layer size */ |
4db6e09f |
1264 | write_vdp_reg 17,0 |
1265 | write_vdp_reg 18,0xff |
1266 | rts |
1267 | |
1268 | |
d4279640 |
1269 | # get mask of bits representing safe words |
27d5cc88 |
1270 | # a1 - address to check |
1271 | # destroys d0-d2, strips upper bits from a1 |
d4279640 |
1272 | get_safety_mask: |
27d5cc88 |
1273 | move.l a1,d1 |
1274 | lsl.l #8,d1 |
1275 | lsr.l #8,d1 |
318e20ff |
1276 | lea (safe_addrs,pc),a1 |
27d5cc88 |
1277 | move.w #(safe_addrs_end - safe_addrs)/8-1,d2 |
1278 | 0: |
1279 | move.l (a1)+,d0 |
1280 | cmp.l d0,d1 |
1281 | blt 1f |
1282 | move.l (a1),d0 |
1283 | cmp.l d0,d1 |
1284 | ble addr_safe |
1285 | 1: |
1286 | addq.l #4,a1 |
1287 | dbra d2,0b |
1288 | |
27d5cc88 |
1289 | move.l d1,a1 |
d4279640 |
1290 | |
1291 | moveq.l #0x0c,d0 |
1292 | cmp.l #0xa14000,d1 |
1293 | beq gsm_rts |
1294 | |
1295 | moveq.l #0x08,d0 |
1296 | cmp.l #0xa14100,d1 |
1297 | beq gsm_rts |
1298 | |
1299 | /* check for VDP address */ |
1300 | move.l d1,d0 |
1301 | swap d0 |
1302 | and.b #0xe0,d0 |
1303 | cmp.b #0xc0,d0 |
1304 | bne addr_unsafe /* not vdp */ |
1305 | |
1306 | move.l d1,d0 |
1307 | and.l #0x0700e0,d0 |
1308 | bne addr_unsafe |
1309 | |
1310 | move.l d1,d0 |
1311 | and.b #0x1f,d0 |
1312 | cmp.b #0x04,d0 |
1313 | blt addr_hsafe_3 /* data port */ |
1314 | cmp.b #0x10,d0 |
1315 | blt addr_safe /* below PSG */ |
1316 | cmp.b #0x18,d0 |
1317 | bge addr_safe /* above PSG */ |
1318 | |
1319 | addr_unsafe: |
1320 | moveq.l #0,d0 /* skip line */ |
1321 | rts |
1322 | |
1323 | addr_hsafe_3: |
1324 | moveq.l #3,d0 /* skip 2 words */ |
27d5cc88 |
1325 | rts |
1326 | |
1327 | addr_safe: |
1328 | move.l d1,a1 |
d4279640 |
1329 | moveq.l #0xf,d0 |
1330 | gsm_rts: |
27d5cc88 |
1331 | rts |
1332 | |
1333 | |
1286a1ba |
1334 | # read single phase from controller |
fbad1b76 |
1335 | # #a0 - addr |
1286a1ba |
1336 | # d0 - result |
fbad1b76 |
1337 | # destroys d1,d2 |
1286a1ba |
1338 | get_input: |
1339 | move.b #0x40,(0xa10003) |
1340 | nop |
1341 | nop |
1342 | nop |
1343 | move.b (0xa10003),d0 |
1344 | move.b #0x00,(0xa10003) |
1345 | lsl.w #8,d0 |
1346 | nop |
1347 | move.b (0xa10003),d0 |
1348 | eor.w #0xffff,d0 |
fbad1b76 |
1349 | |
1350 | swap d7 |
1351 | move.w d7,d1 |
1352 | eor.w d0,d1 /* changed btns */ |
1353 | move.w d0,d7 /* old val */ |
1354 | swap d7 |
1355 | and.w d0,d1 /* what changed now */ |
1356 | bne 0f |
1357 | |
1358 | addq.b #1,d6 |
1359 | move.b d6,d2 |
27d5cc88 |
1360 | and.b #0x0f,d2 /* do autorepeat */ |
1361 | cmp.b #9,d2 |
fbad1b76 |
1362 | bne 1f |
1363 | move.w d0,d1 |
1364 | 0: |
27d5cc88 |
1365 | and.b #0xf0,d6 |
fbad1b76 |
1366 | 1: |
1367 | swap d0 |
1368 | move.w d1,d0 |
1286a1ba |
1369 | rts |
1370 | |
4dfddc2f |
1371 | # Prepare to write to VDP RAM @a0 |
0fc4f06b |
1372 | # sets a0 to VDP data port for convenience |
1373 | # a0: VRAM base |
1374 | # destroys d0 |
570c4371 |
1375 | |
4db6e09f |
1376 | load_prepare: |
0fc4f06b |
1377 | VRAM_ADDR_var a0 |
1378 | move.l d0,(GFXCNTL).l |
1379 | move.l #GFXDATA,a0 |
4db6e09f |
1380 | rts |
1381 | |
1382 | |
0fc4f06b |
1383 | # Load color data from ROM |
1384 | # a0: CRAM base |
1385 | # a1: color list address |
1386 | # d0: number of colors to load |
1387 | # destroys d1 |
4db6e09f |
1388 | |
1389 | load_colors: |
0fc4f06b |
1390 | move.l d0,d1 |
1391 | CRAM_ADDR_var a0 |
1392 | move.l d0,(GFXCNTL).l |
4db6e09f |
1393 | |
0fc4f06b |
1394 | move.l #GFXDATA,a0 |
1395 | subq.w #1,d1 |
1396 | 0: |
1397 | move.w (a1)+,(a0) |
1398 | dbra d1,0b |
4db6e09f |
1399 | |
1400 | rts |
1401 | |
0fc4f06b |
1402 | |
1403 | # print |
1404 | # a0 - string |
1405 | # d0 - x |
1406 | # d1 - y |
4dfddc2f |
1407 | # d2 - tile_bits[15:11] |
0fc4f06b |
1408 | # destroys a1 |
570c4371 |
1409 | |
1410 | print: |
0fc4f06b |
1411 | move.l a0,a1 |
1286a1ba |
1412 | XY2NT |
0fc4f06b |
1413 | jsr load_prepare |
4dfddc2f |
1414 | move.l d2,d0 |
1415 | and.w #0xf800,d0 |
570c4371 |
1416 | |
1417 | _print_loop: |
0fc4f06b |
1418 | move.b (a1)+,d0 |
570c4371 |
1419 | beq _print_end |
1420 | |
0fc4f06b |
1421 | move.w d0,(a0) |
318e20ff |
1422 | bra _print_loop |
570c4371 |
1423 | |
1424 | _print_end: |
1425 | rts |
1426 | |
4db6e09f |
1427 | |
1286a1ba |
1428 | # print_hex |
1429 | # d0 - x |
1430 | # d1 - y |
1431 | # d2 - value |
27d5cc88 |
1432 | # d3 - tile_bits[15:11]|digit_cnt[7:0] |
4276cd7a |
1433 | # destroys a0, preserves d3 |
1286a1ba |
1434 | |
1435 | print_hex: |
1436 | XY2NT |
1437 | jsr load_prepare |
1438 | |
1439 | print_hex_preped: |
4276cd7a |
1440 | moveq.l #0,d0 |
1441 | move.b d3,d0 |
1442 | move.l d0,d1 |
1286a1ba |
1443 | lsl.b #2,d0 |
1444 | ror.l d0,d2 /* prep value */ |
4276cd7a |
1445 | subq.l #1,d1 /* count */ |
1446 | move.w d3,d0 |
1447 | and.w #0xf800,d0 /* keep upper bits in d0 */ |
1286a1ba |
1448 | |
1449 | _print_hex_loop: |
1450 | rol.l #4,d2 |
1451 | move.b d2,d0 |
1452 | and.b #0xf,d0 |
1286a1ba |
1453 | |
1454 | add.b #'0',d0 |
4276cd7a |
1455 | cmp.b #'9',d0 |
1456 | ble 0f |
1457 | addq.b #7,d0 |
1458 | 0: |
1286a1ba |
1459 | move.w d0,(a0) |
4276cd7a |
1460 | dbra d1,_print_hex_loop |
1286a1ba |
1461 | |
1462 | rts |
1463 | |
1464 | |
318e20ff |
1465 | # wait vertical sync interrupt |
4db6e09f |
1466 | |
1467 | wait_vsync: |
fbad1b76 |
1468 | move.b d7,d0 |
4db6e09f |
1469 | _wait_change: |
1470 | stop #0x2000 |
fbad1b76 |
1471 | cmp.b d7,d0 |
4db6e09f |
1472 | beq _wait_change |
1473 | rts |
1474 | |
1475 | |
318e20ff |
1476 | # wait vsync start (polling) |
1477 | # destroys a0,d0 |
1478 | |
1479 | wait_vsync_poll: |
1480 | move.l #GFXCNTL,a0 |
1481 | 0: |
1482 | move.w (a0),d0 |
1483 | and.b #8,d0 |
1484 | nop |
1485 | nop |
1486 | bne 0b |
1487 | 0: |
1488 | move.w (a0),d0 |
1489 | and.b #8,d0 |
1490 | nop |
1491 | nop |
1492 | beq 0b |
1493 | rts |
1494 | |
1495 | |
4db6e09f |
1496 | ################################################# |
1497 | # # |
1498 | # RAM DATA # |
1499 | # # |
1500 | ################################################# |
1501 | |
1502 | .bss |
570c4371 |
1503 | |
fbad1b76 |
1504 | # nothing :) |
4db6e09f |
1505 | |
1506 | .end |
1507 | |
1508 | # vim:filetype=asmM68k |