[ mc6847 ]
*/
+#include "vm.h"
+#include "emu.h"
#include "mc6847.h"
#ifndef MC6847_VRAM_OFS
#define GRAY 11
// from mess m6847.c
-static const uint8 intfont[64 * 12] = {
+static const uint8_t intfont[64 * 12] = {
0x00, 0x00, 0x38, 0x44, 0x04, 0x34, 0x4C, 0x4C, 0x38, 0x00, 0x00, 0x00,
0x00, 0x00, 0x10, 0x28, 0x44, 0x44, 0x7C, 0x44, 0x44, 0x00, 0x00, 0x00,
0x00, 0x00, 0x78, 0x24, 0x24, 0x38, 0x24, 0x24, 0x78, 0x00, 0x00, 0x00,
void MC6847::initialize()
{
+ MC6847_BASE::initialize();
+
// semigraphics pattern
for(int i = 0; i < 16; i++) {
for(int j = 0; j < 6; j++) {
sg6[i * 12 + j] = ((i & 0x02) ? 0xf0 : 0) | ((i & 0x01) ? 0x0f : 0);
}
}
-
// pc pallete
palette_pc[LIGHTGREEN] = RGB_COLOR(184,255,181);
palette_pc[RED ] = RGB_COLOR(254, 65,105);
update_timing(CPU_CLOCKS, FRAMES_PER_SEC, LINES_PER_FRAME);
}
-void MC6847::reset()
-{
- vsync = hsync = disp = true;
-}
-
-void MC6847::write_signal(int id, uint32 data, uint32 mask)
-{
- switch(id) {
- case SIG_MC6847_AG:
- ag = ((data & mask) != 0);
- break;
- case SIG_MC6847_AS:
- as = ((data & mask) != 0);
- break;
- case SIG_MC6847_INTEXT:
- intext = ((data & mask) != 0);
- break;
- case SIG_MC6847_GM:
- gm = (gm & ~mask) | (data & mask);
- break;
- case SIG_MC6847_CSS:
- css = ((data & mask) != 0);
- break;
- case SIG_MC6847_INV:
- inv = ((data & mask) != 0);
- break;
- case SIG_MC6847_ENABLE:
- disabled = ((data & mask) == 0);
- break;
- case SIG_MC6847_DISABLE:
- disabled = ((data & mask) != 0);
- break;
- }
-}
-
-void MC6847::update_timing(int new_clocks, double new_frames_per_sec, int new_lines_per_frame)
-{
- // this should be called before vline event
- tWHS = (int)((double)new_clocks / new_frames_per_sec / (double)new_lines_per_frame * 16.5 / 227.5 + 0.5);
-}
-
-void MC6847::event_vline(int v, int clock)
-{
- // vsync
- set_vsync(v > 32); // 32/262
-
- // hsync
- set_hsync(false);
- register_event_by_clock(this, 0, tWHS, false, NULL);
-}
-
-void MC6847::event_callback(int event_id, int err)
-{
- set_hsync(true);
-}
-
-void MC6847::set_vsync(bool val)
-{
- if(vsync != val) {
- write_signals(&outputs_vsync, val ? 0xffffffff : 0);
- vsync = val;
- set_disp(vsync && hsync);
- }
-}
-
-void MC6847::set_hsync(bool val)
-{
- if(hsync != val) {
- write_signals(&outputs_hsync, val ? 0xffffffff : 0);
- hsync = val;
- set_disp(vsync && hsync);
- }
-}
-
-void MC6847::set_disp(bool val)
-{
- if(disp != val) {
- if(d_cpu != NULL && !disabled) {
- d_cpu->write_signal(SIG_CPU_BUSREQ, val ? 1 : 0, 1);
- }
- disp = val;
- }
-}
-
-void MC6847::load_font_image(const _TCHAR *file_path)
-{
- // external font
- FILEIO* fio = new FILEIO();
- if(fio->Fopen(file_path, FILEIO_READ_BINARY)) {
- fio->Fread(extfont, sizeof(extfont), 1);
- fio->Fclose();
- }
- delete fio;
-}
-
-void MC6847::draw_screen()
-{
- // render screen
- if(disabled) {
- memset(screen, 0, sizeof(screen));
- } else if(ag) {
- // graphics mode
- switch(gm) {
- case 0: draw_cg(4, 3); break; // 64x 64
- case 1: draw_rg(2, 3); break; // 128x 64
- case 2: draw_cg(2, 3); break; // 128x 64
- case 3: draw_rg(2, 2); break; // 128x 96
- case 4: draw_cg(2, 2); break; // 128x 96
- case 5: draw_rg(2, 1); break; // 128x192
- case 6: draw_cg(2, 1); break; // 128x192
- case 7: draw_rg(1, 1); break; // 256x192
- }
- } else {
- // alphanumerics / semigraphics
- draw_alpha();
- }
-
- // copy to screen
- for(int y = 0; y < 192; y++) {
- scrntype* dest = emu->get_screen_buffer(y);
- for(int x = 0; x < 256; x++) {
- dest[x] = palette_pc[screen[y][x]];
- }
- }
-}
-
-void MC6847::draw_cg(int xofs, int yofs)
-{
- uint8 color = css ? 4 : 0;
- int ofs = 0;
-
- for(int y = 0; y < 192; y += yofs) {
- for(int x = 0; x < 256; x += xofs * 4) {
- uint8 data = vram_ptr[ofs];
- if(++ofs >= vram_size) {
- ofs = 0;
- }
- uint8* dest = &screen[y][x];
-
- if(xofs == 4) {
- dest[ 0] = dest[ 1] = dest[ 2] = dest[ 3] = color | ((data >> 6) & 3);
- dest[ 4] = dest[ 5] = dest[ 6] = dest[ 7] = color | ((data >> 4) & 3);
- dest[ 8] = dest[ 9] = dest[10] = dest[11] = color | ((data >> 2) & 3);
- dest[12] = dest[13] = dest[14] = dest[15] = color | ((data >> 0) & 3);
- } else {
- dest[0] = dest[1] = color | ((data >> 6) & 3);
- dest[2] = dest[3] = color | ((data >> 4) & 3);
- dest[4] = dest[5] = color | ((data >> 2) & 3);
- dest[6] = dest[7] = color | ((data >> 0) & 3);
- }
- }
- if(yofs >= 2) {
- memcpy(screen[y + 1], screen[y], 256);
- if(yofs >= 3) {
- memcpy(screen[y + 2], screen[y], 256);
- }
- }
- }
-}
-
-void MC6847::draw_rg(int xofs, int yofs)
-{
- static const uint8 color_table[4] = {
- GREEN, LIGHTGREEN, BLACK, WHITE
- };
- static const uint8 color_table2[4] = {
- BLACK, BLACK, CYAN, WHITE
- };
- static const uint8 color_table3[4] = {
- BLACK, ORANGE, BLACK, WHITE
- };
- uint8 color = css ? 2 : 0;
- int ofs = 0;
-
- for(int y = 0; y < 192; y += yofs) {
- for(int x = 0; x < 256; x += xofs * 8) {
- uint8 data = vram_ptr[ofs];
- if(++ofs >= vram_size) {
- ofs = 0;
- }
- uint8* dest = &screen[y][x];
-
- if(xofs == 2) {
- dest[ 0] = dest[ 1] = color_table[color | ((data >> 7) & 1)];
- dest[ 2] = dest[ 3] = color_table[color | ((data >> 6) & 1)];
- dest[ 4] = dest[ 5] = color_table[color | ((data >> 5) & 1)];
- dest[ 6] = dest[ 7] = color_table[color | ((data >> 4) & 1)];
- dest[ 8] = dest[ 9] = color_table[color | ((data >> 3) & 1)];
- dest[10] = dest[11] = color_table[color | ((data >> 2) & 1)];
- dest[12] = dest[13] = color_table[color | ((data >> 1) & 1)];
- dest[14] = dest[15] = color_table[color | ((data >> 0) & 1)];
- } else if(css) {
- // color bleed in black/white pattern
- dest[0] = color_table2[(data >> 6) & 3];
- dest[1] = color_table3[(data >> 6) & 3];
- dest[2] = color_table2[(data >> 4) & 3];
- dest[3] = color_table3[(data >> 4) & 3];
- dest[4] = color_table2[(data >> 2) & 3];
- dest[5] = color_table3[(data >> 2) & 3];
- dest[6] = color_table2[(data >> 0) & 3];
- dest[7] = color_table3[(data >> 0) & 3];
- } else {
- dest[0] = color_table[(data >> 7) & 1];
- dest[1] = color_table[(data >> 6) & 1];
- dest[2] = color_table[(data >> 5) & 1];
- dest[3] = color_table[(data >> 4) & 1];
- dest[4] = color_table[(data >> 3) & 1];
- dest[5] = color_table[(data >> 2) & 1];
- dest[6] = color_table[(data >> 1) & 1];
- dest[7] = color_table[(data >> 0) & 1];
- }
- }
- if(yofs >= 2) {
- memcpy(screen[y + 1], screen[y], 256);
- if(yofs >= 3) {
- memcpy(screen[y + 2], screen[y], 256);
- }
- }
- }
-}
-
void MC6847::draw_alpha()
{
for(int y = 0; y < 192; y += 12) {
for(int x = 0; x < 256; x += 8) {
- uint8 data = vram_ptr[ofs + MC6847_VRAM_OFS];
+ uint8_t data = vram_ptr[ofs + MC6847_VRAM_OFS];
#ifdef MC6847_ATTR_OFS
- uint8 attr = vram_ptr[ofs + MC6847_ATTR_OFS];
+ uint8_t attr = vram_ptr[ofs + MC6847_ATTR_OFS];
#endif
if(++ofs >= vram_size) {
ofs = 0;
inv2 = ((attr & MC6847_ATTR_INV) != 0);
#endif
#endif
- uint8 *pattern;
- uint8 col_fore, col_back;
+ uint8_t *pattern;
+ uint8_t col_fore, col_back;
if(!as2) {
if(intext2) {
// external alphanumerics
pattern = &extfont[16 * data];
} else {
// internal alphanumerics
- pattern = (uint8 *)(&intfont[12 * (data & 0x3f)]);
+ pattern = (uint8_t *)(&intfont[12 * (data & 0x3f)]);
}
// note: we need to overwrite the color table by each driver
- static const uint8 color_table[6] = {
+ static const uint8_t color_table[6] = {
#ifdef _PHC20
WHITE, GRAY, WHITE, GRAY, WHITE, GRAY
#else
col_back = BLACK;
}
for(int l = 0; l < 12; l++) {
- uint8 pat = pattern[l];
- uint8* dest = &screen[y + l][x];
+ uint8_t pat = pattern[l];
+ uint8_t* dest = &screen[y + l][x];
dest[0] = (pat & 0x80) ? col_fore : col_back;
dest[1] = (pat & 0x40) ? col_fore : col_back;
}
}
}
-
-#define STATE_VERSION 1
-
-void MC6847::save_state(FILEIO* state_fio)
-{
- state_fio->FputUint32(STATE_VERSION);
- state_fio->FputInt32(this_device_id);
-
- state_fio->Fwrite(sg4, sizeof(sg4), 1);
- state_fio->Fwrite(sg6, sizeof(sg6), 1);
- state_fio->FputBool(ag);
- state_fio->FputBool(as);
- state_fio->FputBool(intext);
- state_fio->FputUint8(gm);
- state_fio->FputBool(css);
- state_fio->FputBool(inv);
- state_fio->FputBool(vsync);
- state_fio->FputBool(hsync);
- state_fio->FputBool(disp);
- state_fio->FputInt32(tWHS);
- state_fio->FputBool(disabled);
-}
-
-bool MC6847::load_state(FILEIO* state_fio)
-{
- if(state_fio->FgetUint32() != STATE_VERSION) {
- return false;
- }
- if(state_fio->FgetInt32() != this_device_id) {
- return false;
- }
- state_fio->Fread(sg4, sizeof(sg4), 1);
- state_fio->Fread(sg6, sizeof(sg6), 1);
- ag = state_fio->FgetBool();
- as = state_fio->FgetBool();
- intext = state_fio->FgetBool();
- gm = state_fio->FgetUint8();
- css = state_fio->FgetBool();
- inv = state_fio->FgetBool();
- vsync = state_fio->FgetBool();
- hsync = state_fio->FgetBool();
- disp = state_fio->FgetBool();
- tWHS = state_fio->FgetInt32();
- disabled = state_fio->FgetBool();
- return true;
-}
-
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