2 EPOCH Super Cassette Vision Emulator 'eSCV'
4 Author : Takeda.Toshiya
11 #include "../upd7801.h"
13 static const scrntype palette_pc[16] = {
15 RGB_COLOR( 0, 90,156), RGB_COLOR( 0, 0, 0), RGB_COLOR( 58,148,255), RGB_COLOR( 0, 0,255),
16 RGB_COLOR( 16,214, 0), RGB_COLOR( 66,255, 16), RGB_COLOR(123,230,197), RGB_COLOR( 0,173, 0),
17 RGB_COLOR(255, 41,148), RGB_COLOR(255, 49, 16), RGB_COLOR(255, 58,255), RGB_COLOR(239,156,255),
18 RGB_COLOR(255,206, 33), RGB_COLOR( 74,123, 16), RGB_COLOR(165,148,165), RGB_COLOR(255,255,255)
20 RGB_COLOR( 0, 90,156), RGB_COLOR( 0, 0, 0), RGB_COLOR( 0, 58,255), RGB_COLOR( 0, 0,255),
21 RGB_COLOR( 0,255, 0), RGB_COLOR( 58,255, 90), RGB_COLOR( 0,255,255), RGB_COLOR( 0,255, 0),
22 RGB_COLOR(255, 58,156), RGB_COLOR(255,156,156), RGB_COLOR(255, 58,255), RGB_COLOR(255,156,255),
23 RGB_COLOR(255,255, 90), RGB_COLOR(123,156, 0), RGB_COLOR(189,189,189), RGB_COLOR(255,255,255)
28 // table analyzed by Enri
29 static const uint8 color_pair0[16] = {0x0, 0xf, 0xc, 0xd, 0xa, 0xb, 0x8, 0x9, 0x6, 0x7, 0x4, 0x5, 0x2, 0x3, 0x1, 0x1};
30 static const uint8 color_pair1[16] = {0x0, 0x1, 0x8, 0xb, 0x2, 0x3, 0xa, 0x9, 0x4, 0x5, 0xc, 0xd, 0x6, 0x7, 0xe, 0xf};
32 static const uint8 color_pair0[16] = {0xe, 0xf, 0xc, 0xd, 0xa, 0xb, 0x8, 0x9, 0x6, 0x7, 0x4, 0x5, 0x2, 0x3, 0x0, 0x1};
33 static const uint8 color_pair1[16] = {0x0, 0x1, 0x8, 0x9, 0x2, 0x3, 0xa, 0xb, 0x4, 0x5, 0xc, 0xd, 0x6, 0x7, 0xe, 0xf};
36 static const uint8 symbol[32][8] = {
37 {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},{0x00,0x02,0x7a,0x84,0x84,0x7a,0x00,0x00},
38 {0x00,0x3c,0x42,0x7c,0x42,0x7c,0x40,0x40},{0x00,0x62,0x94,0x08,0x08,0x08,0x00,0x00},
39 {0x00,0xfc,0x50,0x50,0x52,0x8c,0x00,0x00},{0xfe,0x82,0x60,0x10,0x60,0x82,0xfe,0x00},
40 {0x38,0x44,0x82,0x82,0x82,0x44,0xc6,0x00},{0x10,0x7c,0xfe,0xfe,0xfe,0x10,0x38,0x00},
41 {0x6c,0xfe,0xfe,0xfe,0xfe,0x7c,0x10,0x00},{0x10,0x10,0x38,0xfe,0x38,0x10,0x10,0x00},
42 {0x10,0x7c,0x92,0xfe,0x92,0x10,0x38,0x00},{0x38,0x44,0xba,0xa2,0xba,0x44,0x38,0x00},
43 {0x80,0x80,0x88,0x44,0x3e,0x04,0x08,0x00},{0x02,0x02,0x22,0x44,0xf8,0x40,0x20,0x00},
44 {0x10,0x00,0x00,0xfe,0x00,0x00,0x10,0x00},{0x00,0x80,0x40,0x20,0x10,0x08,0x04,0x00},
45 {0x7c,0x82,0x82,0x82,0x82,0x82,0x7c,0x00},{0x7c,0xfe,0xfe,0xfe,0xfe,0xfe,0x7c,0x00},
46 {0x7c,0x82,0xba,0xba,0xba,0x82,0x7c,0x00},{0xfe,0x82,0x82,0x82,0x82,0x82,0xfe,0x00},
47 {0xaa,0x55,0xaa,0x55,0xaa,0x55,0xaa,0x55},{0xff,0x80,0x80,0x80,0x80,0x80,0x80,0x80},
48 {0xff,0x01,0x01,0x01,0x01,0x01,0x01,0x01},{0x80,0x80,0x80,0x80,0x80,0x80,0x80,0xff},
49 {0x01,0x01,0x01,0x01,0x01,0x01,0x01,0xff},{0xfe,0x00,0xfe,0x10,0x10,0x10,0x10,0x00},
50 {0x18,0x14,0x12,0x12,0x72,0xf0,0x60,0x00},{0x18,0x14,0x12,0x12,0x72,0x90,0x60,0x00},
51 {0x10,0x08,0x04,0xfe,0x04,0x08,0x10,0x00},{0x10,0x20,0x40,0xfe,0x40,0x20,0x10,0x00},
52 {0x10,0x38,0x54,0x92,0x10,0x10,0x10,0x00},{0x10,0x10,0x10,0x92,0x54,0x38,0x10,0x00}
55 void VDP::initialize()
58 for(int i = 0, c = 0x20, p = 0; i < 3; i++, c += 32) {
59 for(int j = 0; j < 16; j++) {
60 for(int k = 0; k < 8; k += 2) {
61 uint8 d0 = font_ptr[p++];
62 uint8 d1 = font_ptr[p++];
63 uint8 d2 = font_ptr[p++];
64 uint8 d3 = font_ptr[p++];
66 font[c + j ][k ] = (d0 & 0xf0) | (d1 >> 4);
67 font[c + j + 16][k ] = (d2 & 0xf0) | (d3 >> 4);
68 font[c + j ][k + 1] = (d0 << 4) | (d1 & 0x0f);
69 font[c + j + 16][k + 1] = (d2 << 4) | (d3 & 0x0f);
73 memcpy(font, symbol, sizeof(symbol));
74 memcpy(font[0xb], font[0x60], 8); // copyright mark
76 // register event to interrupt
77 register_vline_event(this);
80 void VDP::event_vline(int v, int clock)
83 d_cpu->write_signal(SIG_UPD7801_INTF2, 1, 1);
85 d_cpu->write_signal(SIG_UPD7801_INTF2, 0, 1);
89 void VDP::draw_screen()
91 // get vdc control params
98 memset(text, vdc1 & 0xf, sizeof(text));
101 // draw sprite screen
102 memset(sprite, 0, sizeof(sprite));
104 draw_sprite_screen();
108 int ty = ((vdc0 & 0xf7) == 0x17 && (vdc2 & 0xef) == 0x4f) ? 32 : 0;
109 uint16 back = palette_pc[vdc1 & 0xf];
111 for(int y = 0; y < ty; y++) {
112 // patch for nekketsu kung-fu road
113 scrntype* d = emu->screen_buffer(y);
114 uint8* t = &text[y + 23][24];
116 for(int x = 0; x < SCREEN_WIDTH; x++) {
117 d[x] = palette_pc[t[x]];
120 for(int y = ty; y < SCREEN_HEIGHT; y++) {
121 scrntype* d = emu->screen_buffer(y);
122 uint8* s = &sprite[y + 21][28];
123 uint8* t = &text[y + 23][24];
125 for(int x = 0; x < SCREEN_WIDTH; x++) {
126 d[x] = palette_pc[s[x] ? s[x] : t[x]];
131 void VDP::draw_text_screen()
133 int xmax = (vdc2 & 0xf) * 2;
134 //xmax = xmax ? xmax : 32;
135 int ymax = vdc2 >> 4;
136 int xs = (vdc0 & 0x40) ? xmax : 0;
137 int xe = (vdc0 & 0x40) ? 32 : xmax;
138 int ys = (vdc0 & 0x80) ? ymax : 0;
139 int ye = (vdc0 & 0x80) ? 16 : ymax;
141 uint8 ct = vdc3 >> 4;
142 uint8 cb = vdc3 & 0xf;
143 uint8 cg = vdc1 >> 4;
145 for(int y = 1; y < 16; y++) {
146 bool t = (ys <= y && y < ye);
149 for(int x = 2; x < 29; x++) {
150 if(t && (xs <= x && x < xe)) {
152 uint8 data = (x < 26) ? (vram1[y32 + x] & 0x7f) : 0;
153 draw_text(x, y, data, ct, cb);
154 } else if((vdc0 & 3) == 1) {
156 uint8 data = vram1[y32 + x];
157 draw_graph(x, y, data, cg);
158 } else if((vdc0 & 3) == 3) {
160 uint8 data = vram1[y32 + x];
161 draw_block(x, y, data);
167 void VDP::draw_text(int dx, int dy, uint8 data, uint8 tcol, uint8 bcol)
169 int dx8 = dx << 3, dy16 = dy << 4;
171 for(int l = 0; l < 8 && data; l++) {
172 uint8* dest = &text[dy16 + l][dx8];
173 uint8 pat = font[data][l];
175 dest[0] = (pat & 0x80) ? tcol : bcol;
176 dest[1] = (pat & 0x40) ? tcol : bcol;
177 dest[2] = (pat & 0x20) ? tcol : bcol;
178 dest[3] = (pat & 0x10) ? tcol : bcol;
179 dest[4] = (pat & 0x08) ? tcol : bcol;
180 dest[5] = (pat & 0x04) ? tcol : bcol;
181 dest[6] = (pat & 0x02) ? tcol : bcol;
182 dest[7] = (pat & 0x01) ? tcol : bcol;
184 for(int l = (data ? 8 : 0); l < 16; l++) {
185 memset(&text[dy16 + l][dx8], bcol, 8);
189 void VDP::draw_block(int dx, int dy, uint8 data)
191 int dx8 = dx << 3, dy16 = dy << 4;
192 uint8 cu = data >> 4, cl = data & 0xf;
195 for(int l = 0; l < 8; l++) {
196 memset(&text[dy16 + l][dx8], cu, 8);
200 for(int l = 8; l < 16; l++) {
201 memset(&text[dy16 + l][dx8], cl, 8);
206 void VDP::draw_graph(int dx, int dy, uint8 data, uint8 col)
208 int dx8l = dx << 3, dx8r = (dx << 3) + 4, dy16 = dy << 4;
211 for(int l = 0; l < 4; l++) {
212 memset(&text[dy16 + l][dx8l], col, 4);
216 for(int l = 0; l < 4; l++) {
217 memset(&text[dy16 + l][dx8r], col, 4);
221 for(int l = 4; l < 8; l++) {
222 memset(&text[dy16 + l][dx8l], col, 4);
226 for(int l = 4; l < 8; l++) {
227 memset(&text[dy16 + l][dx8r], col, 4);
231 for(int l = 8; l < 12; l++) {
232 memset(&text[dy16 + l][dx8l], col, 4);
236 for(int l = 8; l < 12; l++) {
237 memset(&text[dy16 + l][dx8r], col, 4);
241 for(int l = 12; l < 16; l++) {
242 memset(&text[dy16 + l][dx8l], col, 4);
246 for(int l = 12; l < 16; l++) {
247 memset(&text[dy16 + l][dx8r], col, 4);
252 void VDP::draw_sprite_screen()
254 for(int index = 0; index < 128; index++) {
255 uint8 atb0 = vram1[0x200 + (index << 2)];
256 uint8 atb1 = vram1[0x201 + (index << 2)];
257 uint8 atb2 = vram1[0x202 + (index << 2)];
258 uint8 atb3 = vram1[0x203 + (index << 2)];
260 int dx = atb2 & 0xfe;
261 int dy = atb0 & 0xfe;
262 bool conx = ((atb2 & 1) != 0);
263 bool cony = ((atb0 & 1) != 0);
264 uint8 col0 = atb1 & 0xf;
267 int sy = atb1 >> 4, ey = 8;
269 // half/quarter sprite
273 dy = !cony ? dy : dy - 8;
278 dx = !conx ? dx : dx - 8;
284 if((index & 0x20) && (vdc0 & 0x20)) {
286 uint8 col1 = (index & 0x40) ? color_pair1[col0] : color_pair0[col0];
287 int no1 = atb3, no2 = atb3 ^ ((conx ? 8 : 0) | (cony ? 1 : 0));
289 draw_sprite(dx, dy, sx, ex, sy, ey, no1, col0);
291 draw_sprite(dx, dy, sx, ex, sy, ey, no2, col1);
295 int no1 = atb3, no2 = atb3 | 1, no3 = atb3 | 8, no4 = atb3 | 9;
297 draw_sprite(dx, dy, sx, ex, sy, ey, no1, col0);
299 draw_sprite(dx, dy + 16, sx, ex, sy - 8, 8, no2, col0);
302 draw_sprite(dx + 16, dy, 0, 4, sy, ey, no3, col0);
305 draw_sprite(dx + 16, dy + 16, 0, 4, sy - 8, 8, no4, col0);
311 void VDP::draw_sprite(int dx, int dy, int sx, int ex, int sy, int ey, int no, uint8 col)
313 // color #0 is transparent
317 for(int y = (sy < 0 ? 0 : sy), no32 = no << 5; y < ey; y++) {
318 int y2u = (y << 1) + dy, y2l = (y << 1) + dy + 1, y4 = (y << 2) + no32;
320 for(int x = sx; x < ex; x++) {
321 int x4 = dx + (x << 2);
322 uint8* du = &sprite[y2u][x4];
323 uint8* dl = &sprite[y2l][x4];
324 uint8 p = vram0[y4 + x];
326 if(p & 0x80) du[0] = col;
327 if(p & 0x40) du[1] = col;
328 if(p & 0x20) du[2] = col;
329 if(p & 0x10) du[3] = col;
330 if(p & 0x08) dl[0] = col;
331 if(p & 0x04) dl[1] = col;
332 if(p & 0x02) dl[2] = col;
333 if(p & 0x01) dl[3] = col;
338 #define STATE_VERSION 1
340 void VDP::save_state(FILEIO* state_fio)
342 state_fio->FputUint32(STATE_VERSION);
343 state_fio->FputInt32(this_device_id);
345 state_fio->FputUint8(vdc0);
346 state_fio->FputUint8(vdc1);
347 state_fio->FputUint8(vdc2);
348 state_fio->FputUint8(vdc3);
351 bool VDP::load_state(FILEIO* state_fio)
353 if(state_fio->FgetUint32() != STATE_VERSION) {
356 if(state_fio->FgetInt32() != this_device_id) {
359 vdc0 = state_fio->FgetUint8();
360 vdc1 = state_fio->FgetUint8();
361 vdc2 = state_fio->FgetUint8();
362 vdc3 = state_fio->FgetUint8();