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sms vdp, support 224/240 line mode

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This commit is contained in:
kub 2021-10-04 18:03:49 +02:00
parent b784d4a5f7
commit 3758124cb8
2 changed files with 15 additions and 6 deletions
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19
pico/mode4.c
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@ -232,12 +232,14 @@ static void DrawDisplayM4(int scanline)
// Find the line in the name table
line = pv->reg[9] + scanline; // vscroll + scanline
if (line >= 224)
line -= 224;
line &= 0xff;
// Find name table:
nametab = PicoMem.vram;
nametab += (pv->reg[2] & 0x0e) << (10-1);
if ((Pico.video.reg[0] & 6) == 6 && (Pico.video.reg[1] & 0x18))
nametab += ((pv->reg[2] & 0x0c) << (10-1)) + (0x700 >> 1);
else
nametab += (pv->reg[2] & 0x0e) << (10-1);
nametab += (line>>3) << (6-1);
dx = pv->reg[8]; // hscroll
@ -276,7 +278,7 @@ static void DrawDisplayM4(int scanline)
static void FinalizeLineRGB555M4(int line);
void PicoFrameStartMode4(void)
{
int lines = 192, coffs;
int lines = 192, columns = 256, coffs;
skip_next_line = 0;
screen_offset = 24;
Pico.est.rendstatus = PDRAW_32_COLS;
@ -291,13 +293,18 @@ void PicoFrameStartMode4(void)
lines = 224;
}
}
line_offset = PicoIn.opt & (POPT_DIS_32C_BORDER|POPT_EN_SOFTSCALE) ? 0 : 32;
if (PicoIn.opt & POPT_EN_SOFTSCALE) {
line_offset = 0;
columns = 320;
} else
line_offset = PicoIn.opt & POPT_DIS_32C_BORDER ? 0 : 32;
coffs = line_offset;
if (FinalizeLineM4 == FinalizeLineRGB555M4)
line_offset = 0 /* done in FinalizeLine */;
if (Pico.est.rendstatus != rendstatus_old || lines != rendlines) {
emu_video_mode_change(screen_offset, lines, coffs, 256);
emu_video_mode_change(screen_offset, lines, coffs, columns);
rendstatus_old = Pico.est.rendstatus;
rendlines = lines;
}