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less clickypoppy

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This commit is contained in:
dinkc64 2019-04-12 09:44:16 -04:00
parent f014b19ce7
commit 51bece8947
2 changed files with 23 additions and 12 deletions
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33
src/burn/devices/midcsd.cpp
View File

@ -10,27 +10,36 @@ static UINT16 dacvalue;
static UINT16 csd_status;
static INT32 csd_in_reset;
static INT32 csd_is_intialized = 0;
static UINT16 *csd_ram = NULL;
extern INT32 ssio_spyhunter;
static void csd_porta_w(UINT16, UINT8 data)
{
dacvalue = (data << 2) | (dacvalue & 3);
// if (dacvalue !=0) bprintf(0, _T("%X,"), dacvalue);
if (dacvalue == 0x02 || dacvalue == 0x03) dacvalue = 0xFE; // silly hack gets rid of pops in spyhunter when the music starts/stops
dacvalue = (data << 2) | (dacvalue & 3);
if (ssio_spyhunter) {
static UINT16 cm = 0;
// csd_ram[0x30/2] continuously counts down as music is playing
// if its stopped, or 0 - nothing is playing. Let's zero-out the dac
// so that we don't get loud clicks or pops before or after the music.
// 0x4000 + (0x100 << 6) ends up being 0 in the dac.
// extra notes:
// porta is called every sample, playing or not.
// portb is only called when music is playing (if needed)
if (cm == csd_ram[0x30/2] || csd_ram[0x30/2] == 0) dacvalue = 0x100;
cm = csd_ram[0x30/2];
}
DACWrite16Signed(0, 0x4000 + (dacvalue << 6));
}
static void csd_portb_w(UINT16, UINT8 data)
{
dacvalue = (dacvalue & ~0x3) | (data >> 6);
// if (dacvalue !=0) bprintf(0, _T("%X,"), dacvalue);
if (dacvalue == 0x02 || dacvalue == 0x03) dacvalue = 0xFE; // see "silly hack", above
DACWrite16Signed(0, 0x4000 + (dacvalue << 6));
//if (~pia_get_ddr_b(0) & 0x30) csd_status = (data >> 4) & 3;
UINT8 z_mask = pia_get_ddr_b(0);
if (~z_mask & 0x10) csd_status = (csd_status & ~1) | ((data >> 4) & 1);
if (~z_mask & 0x20) csd_status = (csd_status & ~2) | ((data >> 4) & 2);
if (~pia_get_ddr_b(0) & 0x30) csd_status = (data >> 4) & 3;
}
static void csd_irq(int state)
@ -138,6 +147,7 @@ static const pia6821_interface pia_intf = {
void csd_init(UINT8 *rom, UINT8 *ram)
{
csd_ram = (UINT16*)ram;
SekInit(0, 0x68000);
SekOpen(0);
SekMapMemory(rom, 0x000000, 0x007fff, MAP_ROM);
@ -165,7 +175,8 @@ void csd_exit()
SekExit();
pia_init();
DACExit();
csd_is_intialized = 0;
csd_is_intialized = 0;
csd_ram = NULL;
}
void csd_scan(INT32 nAction, INT32 *pnMin)

2
src/burn/drv/pre90s/d_mcr3.cpp
View File

@ -1284,7 +1284,7 @@ static INT32 SpyhuntDraw()
}
if (lamp&0x08) {
// smoke
RenderZoomedTile(pTransDraw, DrvGfxROM1, 0x02f, 0, 0, nScreenWidth-16, 80, 0, 0, 32, 32, 0x10000/2, 0x10000/2);
RenderZoomedTile(pTransDraw, DrvGfxROM1, 0x019, 0, 0, nScreenWidth-16, 80, 0, 0, 32, 32, 0x10000/2, 0x10000/2);
}
if (lamp&0x02) {
// missile (pre-rotated)