Mercurial > repos > blastem

annotate jag_video.c @ 1088:c0a026e974f4

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Basic handling of video/object processor register writes
author Michael Pavone <pavone@retrodev.com>
date Sat, 08 Oct 2016 23:49:20 -0700
parents 6433d4d05934
children 87597a048d38
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1 #include <stdint.h>
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2 #include <stdlib.h>
1088
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
3 #include <stdio.h>
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
4 #include "jag_video.h"
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
5
1088
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
6 enum {
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
7 VMODE_CRY,
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
8 VMODE_RGB24,
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
9 VMODE_DIRECT16,
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
10 VMODE_RGB16,
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
11 VMODE_VARIABLE
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
12 };
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
13
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
14 char *vmode_names[] = {
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
15 "CRY",
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
16 "RGB16",
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
17 "DIRECT16",
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
18 "VARIABLE"
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
19 };
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
20
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
21 jag_video *jag_video_init(void)
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
22 {
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
23 return calloc(1, sizeof(jag_video));
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
24 }
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
25
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
26 void jag_video_run(jag_video *context, uint32_t target_cycle)
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
27 {
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
28 context->cycles = target_cycle;
1088
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
29
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
30 }
1088
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
31
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
32 static uint8_t is_reg_writeable(uint32_t address)
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
33 {
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
34 return address < VID_HLPEN || address >= VID_OBJLIST1;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
35 }
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
36
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
37 void jag_video_reg_write(jag_video *context, uint32_t address, uint16_t value)
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
38 {
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
39 uint32_t reg = (address >> 1 & 0x7F) - 2;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
40 if (reg < JAG_VIDEO_REGS && is_reg_writeable(reg)) {
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
41 context->regs[reg] = value;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
42 if (reg == VID_VMODE) {
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
43 context->pclock_div = (value >> 9 & 7) + 1;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
44 context->pclock_counter = 0;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
45 if (value & 0x10) {
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
46 context->mode = VMODE_VARIABLE;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
47 } else {
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
48 context->mode = value >> 1 & 3;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
49 }
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
50 printf("Mode %s, pixel clock divider: %d, time base generation: %s\n", vmode_names[context->mode], context->pclock_div, value & 1 ? "enabled" : "disabled");
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
51 }
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
52 switch (reg)
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
53 {
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
54 case VID_OBJLIST1:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
55 printf("Object List Pointer 1: %X\n", value);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
56 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
57 case VID_OBJLIST2:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
58 printf("Object List Pointer 2: %X\n", value);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
59 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
60 case VID_HPERIOD:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
61 printf("Horizontal period: %d\n", value & 0x3FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
62 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
63 case VID_HBLANK_BEGIN:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
64 printf("horizontal blanking begin: %d\n", value & 0x7FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
65 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
66 case VID_HBLANK_END:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
67 printf("horizontal blanking end: %d\n", value & 0x7FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
68 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
69 case VID_HSYNC:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
70 printf("horizontal sync start: %d\n", value & 0x7FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
71 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
72 case VID_HDISP_BEGIN1:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
73 printf("horizontal display begin 1: %d\n", value & 0x7FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
74 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
75 case VID_HDISP_BEGIN2:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
76 printf("horizontal display begin 2: %d\n", value & 0x7FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
77 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
78 case VID_HDISP_END:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
79 printf("horizontal display end: %d\n", value & 0x7FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
80 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
81 case VID_VPERIOD:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
82 printf("Vertical period: %d\n", value & 0x7FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
83 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
84 case VID_VBLANK_BEGIN:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
85 printf("vertical blanking begin: %d\n", value & 0x7FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
86 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
87 case VID_VBLANK_END:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
88 printf("vertical blanking end: %d\n", value & 0x7FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
89 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
90 case VID_VSYNC:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
91 printf("vertical sync start: %d\n", value & 0x7FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
92 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
93 case VID_VDISP_BEGIN:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
94 printf("vertical display begin: %d\n", value & 0x7FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
95 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
96 case VID_VDISP_END:
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
97 printf("vertical display end: %d\n", value & 0x7FF);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
98 break;
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
99 }
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
100 } else {
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
101 fprintf(stderr, "Write to invalid video/object processor register %X:%X\n", address, value);
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
102 }
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
103 }