source: buchla-68k/ram/midas.c@ 99cac86

Last change on this file since 99cac86 was aa021e2, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Don't shift negative constants.
  • Property mode set to 100644
File size: 6.3 KB
Line 
1/*
2 =============================================================================
3 midas.c -- MIDAS-VII main function
4 Version 26 -- 1989-07-19 -- D.N. Lynx Crowe
5 =============================================================================
6*/
7
8#define DEBUGIT 0
9
10#include "ram.h"
11
12#define LCD_TIME ((int32_t)(800 * 240)) /* LCD backlight 'on' time */
13
14#if DEBUGIT
15short debugmm = 1;
16#endif
17
18int8_t m7verms[32]; /* version message for the main menu */
19int16_t clkdiv; /* clock divider */
20
21/*
22 =============================================================================
23 dopls1() -- process pulse 1 inputs
24 =============================================================================
25*/
26
27void dopls1(void)
28{
29 putwq(&ptefifo, 0x1180); /* pulse 1 trigger -> STM fifo */
30
31 if (NOT clkrun) /* check for clock enable */
32 return; /* done if not enabled */
33
34 if (clksrc EQ CK_PLS24) { /* Pulse 24 mode ? */
35
36 fc_val += 2L; /* 2 clocks per pulse */
37
38 if (fc_val > 0x00FFFFFFL) /* limit clock at maximum */
39 fc_val = 0x00FFFFFFL;
40
41 } else if (clksrc EQ CK_PLS48) { /* Pulse 48 mode ? */
42
43 ++fc_val; /* 1 clock per pulse */
44
45 if (fc_val > 0x00FFFFFFL) /* limit clock at maximum */
46 fc_val = 0x00FFFFFFL;
47
48 } else if (clksrc EQ CK_PLS96) { /* Pulse 96 mode ? */
49
50 if (clkdiv++) { /* 2 pulses per clock */
51
52 clkdiv = 0; /* reset divider */
53 ++fc_val; /* update frame clock */
54
55 if (fc_val > 0x00FFFFFFL) /* limit clock at maximum */
56 fc_val = 0x00FFFFFFL;
57 }
58 }
59}
60
61/*
62 =============================================================================
63 dopls2() -- process pulse 2 inputs
64 =============================================================================
65*/
66
67void dopls2(void)
68{
69 putwq(&ptefifo, 0x1181); /* pulse 2 trigger -> STM fifo */
70}
71
72/*
73 =============================================================================
74 mpcupd() -- MIDI program change display update
75 =============================================================================
76*/
77
78void mpcupd(void)
79{
80 switch (ndisp) {
81
82 case 0: /* Librarian */
83
84 break;
85
86 case 1: /* Patch Editor */
87
88 break;
89
90 case 2: /* Score Editor */
91
92 sdwins(); /* fill in the windows */
93 break;
94
95 case 3: /* Sequence Editor */
96
97 break;
98
99 case 4: /* Instrument Editor */
100
101 setinst(); /* bring variables up to date */
102 allwins(); /* fill in the windows */
103 break;
104
105 case 5: /* Initialize System */
106
107 break;
108
109 case 6: /* Waveshape Editor */
110
111 newws(); /* bring variables up to date */
112 wwins(); /* fill in the windows */
113 break;
114
115 case 7: /* Write Program to Disk */
116
117 break;
118
119 case 8: /* Tuning Editor */
120
121 twins(); /* fill in the windows */
122 break;
123
124 case 9: /* Format Disk */
125
126 break;
127
128 case 10: /* Assignment Editor */
129
130 awins(); /* fill in the windows */
131 break;
132 }
133}
134
135/*
136 =============================================================================
137 MIDAS 700 main function
138 =============================================================================
139*/
140
141void main(void)
142{
143 setipl(FPU_DI); /* disable FPU interrupts */
144
145/* +++++++++++++++++++++++ FPU INTERRUPTS DISABLED ++++++++++++++++++++++++++ */
146
147 BIOS(B_SETV, 26, fpuint); /* set level 2 int. vector for FPU */
148
149 initcfg = 0; /* set initial configuration (in MS bits) */
150 fp_resv[0] = VALMIN; /* initial output amplitude = 0.0 */
151
152 fpuclr(); /* quiet the FPU */
153
154 tsetup(); /* setup the timer and timer interrupts */
155 setsio(); /* setup the serial I/O port interrupts */
156
157 foot1 = clk_ped; /* setup clock on/off pedal processing */
158 foot2 = pch_ped; /* setup punch in/out pedal processing */
159
160 pulse1 = dopls1; /* setup pulse input 1 processing */
161 pulse2 = dopls2; /* setup pulse input 2 processing */
162
163 lcdontm = LCD_TIME; /* set the LCD backlight 'on' time */
164 lcd_on(); /* turn on the LCD backlight */
165
166 strcpy(m7verms, &VerDate[2]); /* setup the version message */
167
168 im700(); /* initialize everything */
169 settune(); /* ... including fine tuning */
170
171 ndisp = -1; /* say nothing has been selected yet */
172 verbose = FALSE; /* setup to run the script quietly */
173 rscript(script0); /* run the initial script */
174 sc_goto(0L); /* position the score */
175
176 MouseWK(); /* wake up the mouse if it's there */
177
178 goto startup; /* go put up the main menu */
179
180newdisp:
181
182 msl(); /* run the new display */
183
184startup:
185
186#if DEBUGIT
187 if (debugsw AND debugmm)
188 printf("main(): switching to MAIN MENU\N");
189#endif
190
191 m7menu(); /* put up the main menu */
192 msl(); /* run the main menu */
193
194#if DEBUGIT
195 if (debugsw AND debugmm)
196 printf("main(): switching to %d\n", ndisp);
197#endif
198
199 switch (ndisp) { /* setup for a new display */
200
201 case 0: /* =================== librarian ==================== */
202
203 ldfield(); /* setup the librarian field handlers */
204 libdsp(); /* setup the librarian display */
205 break;
206
207 case 1: /* =================== patch editor ================= */
208
209 ptfield(); /* setup the patch field handlers */
210 ptdisp(); /* setup the patch display */
211 break;
212
213 case 2: /* =================== score editor ================= */
214
215 scfield(); /* initialize score field handlers */
216 sdsetup(); /* setup the score display */
217 break;
218
219 case 3: /* ================ sequence editor ================= */
220
221 sqfield(); /* initialize sequence field handlers */
222 sqdisp(); /* setup the sequence display */
223 break;
224
225 case 4: /* =============== instrument editor ================ */
226
227 idfield(); /* setup instrument field handlers */
228 instdsp(); /* setup the instrument display */
229 break;
230
231 case 6: /* ================ waveshape editor ================ */
232
233 wdfield(); /* setup waveshape field handlers */
234 wsdsp(); /* setup the waveshape display */
235 break;
236
237 case 8: /* ================ tuning editor ================ */
238
239 tdfield(); /* setup tuning editor field handlers */
240 tundsp(); /* setup the tuning display */
241 break;
242
243 case 10: /* ================ assignment editor =============== */
244
245 adfield(); /* setup assignment field handlers */
246 asgdsp(); /* setup the assignment display */
247 break;
248
249 case 11: /* ================ diagnostics ===================== */
250
251 scopeon(); /* setup the diagnostics */
252 break;
253
254 default:
255
256#if DEBUGIT
257 if (debugsw AND debugmm)
258 printf("main(): UNKNOWN display (%d)\n", ndisp);
259#endif
260
261 ndisp = -1;
262 goto startup;
263 }
264
265#if DEBUGIT
266 if (debugsw AND debugmm)
267 printf("main(): display switch complete to %d\n", ndisp);
268#endif
269
270 goto newdisp;
271}
272
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