source: buchla-68k/ram/gcurpos.c@ a3eb131

Last change on this file since a3eb131 was 8c8b4e5, checked in by Thomas Lopatic <thomas@…>, 7 years ago

More volatile hardware accesses.
  • Property mode set to 100644
File size: 8.7 KB
Line 
1/*
2 =============================================================================
3 gcurpos.c -- MIDAS cursor arrow functions and arrow object definitions
4 Version 16 -- 1988-03-11 -- D.N. Lynx Crowe
5 =============================================================================
6*/
7
8#include "ram.h"
9
10#define YOFF 15 /* y pixel offset */
11#define XOFF 14 /* x pixel offset */
12
13/* 4 bit pixel patterns */
14
15#define AW_0 0x0000
16#define AW_1 0xF000
17#define AW_2 0x0F00
18#define AW_3 0xFF00
19#define AW_4 0x00F0
20#define AW_5 0xF0F0
21#define AW_6 0x0FF0
22#define AW_7 0xFFF0
23#define AW_8 0x000F
24#define AW_9 0xF00F
25#define AW_A 0x0F0F
26#define AW_B 0xFF0F
27#define AW_C 0x00FF
28#define AW_D 0xF0FF
29#define AW_E 0x0FFF
30#define AW_F 0xFFFF
31
32static uint16_t ar_ule[] = { /* upper left even pixel arrow */
33
34 AW_F, AW_0, AW_0, AW_0, /* 0 */
35 AW_C, AW_0, AW_0, AW_0, /* 1 */
36 AW_A, AW_0, AW_0, AW_0, /* 2 */
37 AW_9, AW_0, AW_0, AW_0, /* 3 */
38 AW_0, AW_8, AW_0, AW_0, /* 4 */
39 AW_0, AW_4, AW_0, AW_0, /* 5 */
40 AW_0, AW_2, AW_0, AW_0, /* 6 */
41 AW_0, AW_1, AW_0, AW_0, /* 7 */
42 AW_0, AW_0, AW_8, AW_0, /* 8 */
43 AW_0, AW_0, AW_7, AW_8, /* 9 */
44 AW_0, AW_0, AW_6, AW_0, /* 10 */
45 AW_0, AW_0, AW_5, AW_E, /* 11 */
46 AW_0, AW_0, AW_5, AW_8, /* 12 */
47 AW_0, AW_0, AW_1, AW_4, /* 13 */
48 AW_0, AW_0, AW_1, AW_2, /* 14 */
49 AW_0, AW_0, AW_0, AW_0 /* 15 */
50};
51
52static uint16_t ar_ulo[] = { /* upper left odd pixel arrow */
53
54 AW_7, AW_8, AW_0, AW_0, /* 0 */
55 AW_6, AW_0, AW_0, AW_0, /* 1 */
56 AW_5, AW_0, AW_0, AW_0, /* 2 */
57 AW_4, AW_8, AW_0, AW_0, /* 3 */
58 AW_0, AW_4, AW_0, AW_0, /* 4 */
59 AW_0, AW_2, AW_0, AW_0, /* 5 */
60 AW_0, AW_1, AW_0, AW_0, /* 6 */
61 AW_0, AW_0, AW_8, AW_0, /* 7 */
62 AW_0, AW_0, AW_4, AW_0, /* 8 */
63 AW_0, AW_0, AW_3, AW_C, /* 9 */
64 AW_0, AW_0, AW_3, AW_0, /* 10 */
65 AW_0, AW_0, AW_2, AW_F, /* 11 */
66 AW_0, AW_0, AW_2, AW_C, /* 12 */
67 AW_0, AW_0, AW_0, AW_A, /* 13 */
68 AW_0, AW_0, AW_0, AW_9, /* 14 */
69 AW_0, AW_0, AW_0, AW_0 /* 15 */
70};
71
72static uint16_t ar_ure[] = { /* upper right even pixel arrow */
73
74 AW_0, AW_0, AW_1, AW_E, /* 0 */
75 AW_0, AW_0, AW_0, AW_6, /* 1 */
76 AW_0, AW_0, AW_0, AW_A, /* 2 */
77 AW_0, AW_0, AW_1, AW_2, /* 3 */
78 AW_0, AW_0, AW_2, AW_0, /* 4 */
79 AW_0, AW_0, AW_4, AW_0, /* 5 */
80 AW_0, AW_0, AW_8, AW_0, /* 6 */
81 AW_0, AW_1, AW_0, AW_0, /* 7 */
82 AW_0, AW_2, AW_0, AW_0, /* 8 */
83 AW_3, AW_C, AW_0, AW_0, /* 9 */
84 AW_0, AW_C, AW_0, AW_0, /* 10 */
85 AW_F, AW_4, AW_0, AW_0, /* 11 */
86 AW_3, AW_4, AW_0, AW_0, /* 12 */
87 AW_5, AW_0, AW_0, AW_0, /* 13 */
88 AW_9, AW_0, AW_0, AW_0, /* 14 */
89 AW_0, AW_0, AW_0, AW_0 /* 15 */
90};
91
92static uint16_t ar_uro[] = { /* upper right odd pixel arrow */
93
94 AW_0, AW_0, AW_0, AW_F, /* 0 */
95 AW_0, AW_0, AW_0, AW_3, /* 1 */
96 AW_0, AW_0, AW_0, AW_5, /* 2 */
97 AW_0, AW_0, AW_0, AW_9, /* 3 */
98 AW_0, AW_0, AW_1, AW_0, /* 4 */
99 AW_0, AW_0, AW_2, AW_0, /* 5 */
100 AW_0, AW_0, AW_4, AW_0, /* 6 */
101 AW_0, AW_0, AW_8, AW_0, /* 7 */
102 AW_0, AW_1, AW_0, AW_0, /* 8 */
103 AW_1, AW_E, AW_0, AW_0, /* 9 */
104 AW_0, AW_6, AW_0, AW_0, /* 10 */
105 AW_7, AW_A, AW_0, AW_0, /* 11 */
106 AW_1, AW_A, AW_0, AW_0, /* 12 */
107 AW_2, AW_8, AW_0, AW_0, /* 13 */
108 AW_4, AW_8, AW_0, AW_0, /* 14 */
109 AW_0, AW_0, AW_0, AW_0 /* 15 */
110};
111
112static uint16_t ar_lle[] = { /* lower left even pixel arrow */
113
114 AW_0, AW_0, AW_0, AW_0, /* 0 */
115 AW_0, AW_0, AW_1, AW_2, /* 1 */
116 AW_0, AW_0, AW_1, AW_4, /* 2 */
117 AW_0, AW_0, AW_5, AW_8, /* 3 */
118 AW_0, AW_0, AW_5, AW_E, /* 4 */
119 AW_0, AW_0, AW_6, AW_0, /* 5 */
120 AW_0, AW_0, AW_7, AW_8, /* 6 */
121 AW_0, AW_0, AW_8, AW_0, /* 7 */
122 AW_0, AW_1, AW_0, AW_0, /* 8 */
123 AW_0, AW_2, AW_0, AW_0, /* 9 */
124 AW_0, AW_4, AW_0, AW_0, /* 10 */
125 AW_0, AW_8, AW_0, AW_0, /* 11 */
126 AW_9, AW_0, AW_0, AW_0, /* 12 */
127 AW_A, AW_0, AW_0, AW_0, /* 13 */
128 AW_C, AW_0, AW_0, AW_0, /* 14 */
129 AW_F, AW_0, AW_0, AW_0 /* 15 */
130};
131
132static uint16_t ar_llo[] = { /* lower left odd pixel arrow */
133
134 AW_0, AW_0, AW_0, AW_0, /* 0 */
135 AW_0, AW_0, AW_0, AW_9, /* 1 */
136 AW_0, AW_0, AW_0, AW_A, /* 2 */
137 AW_0, AW_0, AW_2, AW_C, /* 3 */
138 AW_0, AW_0, AW_2, AW_F, /* 4 */
139 AW_0, AW_0, AW_3, AW_0, /* 5 */
140 AW_0, AW_0, AW_3, AW_C, /* 6 */
141 AW_0, AW_0, AW_4, AW_0, /* 7 */
142 AW_0, AW_0, AW_8, AW_0, /* 8 */
143 AW_0, AW_1, AW_0, AW_0, /* 9 */
144 AW_0, AW_2, AW_0, AW_0, /* 10 */
145 AW_0, AW_4, AW_0, AW_0, /* 11 */
146 AW_4, AW_8, AW_0, AW_0, /* 12 */
147 AW_5, AW_0, AW_0, AW_0, /* 13 */
148 AW_6, AW_0, AW_0, AW_0, /* 14 */
149 AW_7, AW_8, AW_0, AW_0 /* 15 */
150};
151
152static uint16_t ar_lre[] = { /* lower right even pixel arrow */
153
154 AW_0, AW_0, AW_0, AW_0, /* 0 */
155 AW_9, AW_0, AW_0, AW_0, /* 1 */
156 AW_5, AW_0, AW_0, AW_0, /* 2 */
157 AW_3, AW_4, AW_0, AW_0, /* 3 */
158 AW_F, AW_4, AW_0, AW_0, /* 4 */
159 AW_0, AW_C, AW_0, AW_0, /* 5 */
160 AW_3, AW_C, AW_0, AW_0, /* 6 */
161 AW_0, AW_2, AW_0, AW_0, /* 7 */
162 AW_0, AW_1, AW_0, AW_0, /* 8 */
163 AW_0, AW_0, AW_8, AW_0, /* 9 */
164 AW_0, AW_0, AW_4, AW_0, /* 10 */
165 AW_0, AW_0, AW_2, AW_0, /* 11 */
166 AW_0, AW_0, AW_1, AW_2, /* 12 */
167 AW_0, AW_0, AW_0, AW_A, /* 13 */
168 AW_0, AW_0, AW_0, AW_6, /* 14 */
169 AW_0, AW_0, AW_1, AW_E /* 15 */
170};
171
172static uint16_t ar_lro[] = { /* lower right odd pixel arrow */
173
174 AW_0, AW_0, AW_0, AW_0, /* 0 */
175 AW_4, AW_8, AW_0, AW_0, /* 1 */
176 AW_2, AW_8, AW_0, AW_0, /* 2 */
177 AW_1, AW_A, AW_0, AW_0, /* 3 */
178 AW_7, AW_A, AW_0, AW_0, /* 4 */
179 AW_0, AW_6, AW_0, AW_0, /* 5 */
180 AW_1, AW_E, AW_0, AW_0, /* 6 */
181 AW_0, AW_1, AW_0, AW_0, /* 7 */
182 AW_0, AW_0, AW_8, AW_0, /* 8 */
183 AW_0, AW_0, AW_4, AW_0, /* 9 */
184 AW_0, AW_0, AW_2, AW_0, /* 10 */
185 AW_0, AW_0, AW_1, AW_0, /* 11 */
186 AW_0, AW_0, AW_0, AW_9, /* 12 */
187 AW_0, AW_0, AW_0, AW_5, /* 13 */
188 AW_0, AW_0, AW_0, AW_3, /* 14 */
189 AW_0, AW_0, AW_0, AW_F /* 15 */
190};
191
192static volatile uint16_t *arrows[] = { /* arrow pointer table */
193
194 v_curs0, /* 0 - upper left, even pixel */
195 v_curs1, /* 1 - upper left, odd pixel */
196
197 v_curs2, /* 2 - upper right, even pixel */
198 v_curs3, /* 3 - upper right, odd pixel */
199
200 v_curs4, /* 4 - lower left, even pixel */
201 v_curs5, /* 5 - lower left, odd pixel */
202
203 v_curs6, /* 6 - lower right, even pixel */
204 v_curs7 /* 7 - lower right, odd pixel */
205};
206
207/*
208 =============================================================================
209 gcurpos(xloc, yloc) -- position the graphic cursor at ('xloc', 'yloc')
210
211 Also sets stcrow and stccol to keep them in sync.
212 =============================================================================
213*/
214
215int16_t gcurpos(int16_t xloc, int16_t yloc)
216{
217 register int16_t ab, xo, yo;
218 register struct octent *op;
219
220 if (xloc LT XCTR) {
221
222 xo = 0; /* arrow points left */
223
224 if (yloc LT YCTR)
225 {ab = 0; yo = 0;} /* arrow points up */
226 else
227 {ab = 4; yo = -YOFF;} /* arrow points down */
228
229 } else {
230
231 xo = -XOFF; /* arrow points right */
232
233 if (yloc LT YCTR)
234 {ab = 2; yo = 0;} /* arrow points up */
235 else
236 {ab = 6; yo = -YOFF;} /* arrow points down */
237 }
238
239 if (v_regs[5] & 0x0180)
240 vbank(0);
241
242 v_odtab[GCPRI][0] |= V_BLA;
243 objclr(GCPRI);
244
245 op = &v_obtab[GCURS];
246 op->objx = xloc + xo;
247 op->objy = yloc + yo;
248 op->obase = arrows[ab + (xloc & 0x0001)];
249 op->odtw1 = 0x0400 | (0x03FF & (op->objx >> 1));
250
251 SetPri(GCURS, GCPRI);
252
253 stcrow = yloc / 14;
254 stccol = xloc >> 3;
255 return(ab + (xloc & 0x0001));
256}
257
258/*
259 =============================================================================
260 andcopy() -- copy a pattern
261 =============================================================================
262*/
263
264void andcopy(volatile uint16_t *to, volatile uint16_t *from, uint16_t with, int16_t len)
265{
266 register int16_t i;
267
268 for (i = len; i--; )
269 *to++ = *from++ & with;
270}
271
272/*
273 =============================================================================
274 arcurs() -- setup the arrow cursor
275 =============================================================================
276*/
277
278void arcurs(uint16_t icolor)
279{
280 register int16_t color;
281
282 color = exp_c(icolor);
283
284 if ((v_regs[5] & 0x0180) NE 0x0100)
285 vbank(1);
286
287 andcopy(v_curs0, ar_ule, color, 64); /* setup arrow cursor */
288 andcopy(v_curs1, ar_ulo, color, 64);
289 andcopy(v_curs2, ar_ure, color, 64);
290 andcopy(v_curs3, ar_uro, color, 64);
291 andcopy(v_curs4, ar_lle, color, 64);
292 andcopy(v_curs5, ar_llo, color, 64);
293 andcopy(v_curs6, ar_lre, color, 64);
294 andcopy(v_curs7, ar_lro, color, 64);
295}
296
297/*
298 =============================================================================
299 sgcon() -- set graphic cursor object "on"
300 =============================================================================
301*/
302
303void sgcon(void)
304{
305 if (sgcsw)
306 return;
307
308 if (v_regs[5] & 0x0180)
309 vbank(0);
310
311 v_odtab[GCPRI][0] &= ~V_BLA;
312 sgcsw = TRUE;
313}
314
315/*
316 =============================================================================
317 sgcoff() -- set graphic cursor object "off"
318 =============================================================================
319*/
320
321void sgcoff(void)
322{
323 if (!sgcsw)
324 return;
325
326 if (v_regs[5] & 0x0180)
327 vbank(0);
328
329 v_odtab[GCPRI][0] |= V_BLA;
330 sgcsw = FALSE;
331}
332
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