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sms, minor fixes (vdp mode switch, zram init)

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This commit is contained in:
kub 2021-10-24 22:51:16 +02:00
parent 1c70532fc2
commit 1603058a88
2 changed files with 17 additions and 6 deletions
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11
pico/mode4.c
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@ -18,7 +18,7 @@
static void (*FinalizeLineSMS)(int line);
static int skip_next_line;
static int screen_offset, line_offset;
static u8 mode;
/* sprite collision detection */
static int CollisionDetect(u8 *mb, u16 sx, unsigned int pack, int zoomed)
@ -558,6 +558,12 @@ void PicoFrameStartSMS(void)
loffs = screen_offset = 24; // 192 lines is really 224 with top/bottom bars
Pico.est.rendstatus = PDRAW_32_COLS;
// if mode changes make palette dirty since some modes switch to a fixed one
if (mode != ((Pico.video.reg[0]&0x06) | (Pico.video.reg[1]&0x18))) {
mode = (Pico.video.reg[0]&0x06) | (Pico.video.reg[1]&0x18);
Pico.m.dirtyPal = 1;
}
// Copy LCD enable flag for easier handling
Pico.m.hardware &= ~0x2;
if (PicoIn.opt & POPT_EN_GG_LCD)
@ -569,7 +575,7 @@ void PicoFrameStartSMS(void)
loffs = 48;
lines = 144;
columns = 160;
} else switch ((Pico.video.reg[0]&0x06) | (Pico.video.reg[1]&0x18)) {
} else switch (mode) {
// SMS2 only 224/240 line modes, e.g. Micro Machines
case 0x06|0x08:
loffs = screen_offset = 0;
@ -717,6 +723,7 @@ void PicoDrawSetOutputSMS(pdso_t which)
PicoDrawSetInternalBuf(Pico.est.Draw2FB, 328); break;
}
rendstatus_old = -1;
mode = -1;
}
// vim:shiftwidth=2:ts=2:expandtab

12
pico/sms.c
View file

@ -1,6 +1,7 @@
/*
* SMS emulation
* (C) notaz, 2009-2010
* (C) kub, 2021
*
* This work is licensed under the terms of MAME license.
* See COPYING file in the top-level directory.
@ -149,10 +150,10 @@ static unsigned char z80_sms_in(unsigned short a)
case 0x01:
if ((Pico.m.hardware & 0x1) && a < 0x8) { // GG I/O area
switch (a) {
case 0: d = 0xff & ~(PicoIn.pad[0] & 0x80); break;
case 1: d = Pico.ms.io_gg[1] | Pico.ms.io_gg[2]; break;
case 5: d = Pico.ms.io_gg[5] & 0xf8; break;
default: d = Pico.ms.io_gg[a]; break;
case 0: d = 0xff & ~(PicoIn.pad[0] & 0x80); break;
case 1: d = Pico.ms.io_gg[1] | (Pico.ms.io_gg[2] & 0x7f); break;
case 5: d = Pico.ms.io_gg[5] & 0xf8; break;
default: d = Pico.ms.io_gg[a]; break;
}
}
break;
@ -398,6 +399,9 @@ void PicoPowerMS(void)
memset(&Pico.m,0,sizeof(Pico.m));
Pico.m.pal = 0;
for (s = 0; s < sizeof(PicoMem.zram); s++)
PicoMem.zram[s] = rand();
// calculate a mask for bank writes.
// ROM loader has aligned the size for us, so this is safe.
s = 0; tmp = Pico.romsize;