RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 07:17:45 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

timing for fast mode

Browse source 
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@246 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-09-13 18:09:11 +00:00
parent b8cbd802cd
commit e849512f15
2 changed files with 30 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

29
Pico/Pico.c
View file

@ -495,21 +495,21 @@ static int PicoFrameSimple(void)
int y=0,line=0,lines=0,lines_step=0,sects;
int cycles_68k_vblock,cycles_68k_block;
if (Pico.m.pal) {
// M68k cycles/frame: 152009.78
// split to 16 run calls for active scan, for vblank split to 2 (ntsc), 3 (pal 240), 4 (pal 224)
if (Pico.m.pal && (pv->reg[1]&8)) { // 240 lines
if(pv->reg[1]&8) { // 240 lines
cycles_68k_block = (int) ((double) OSC_PAL / 7 / 50 / 312 * 15 + 0.4); // 16 sects, 16*15=240, 7308
cycles_68k_vblock = (int) ((double) OSC_PAL / 7 / 50 / 312 * 24 + 0.4); // 3 sects, 3*24=72, 35163?
cycles_68k_block = 7329; // (488*240+148)/16.0, -4
cycles_68k_vblock = 11640; // (72*488-148-68)/3.0, 0
lines_step = 15;
} else {
cycles_68k_block = (int) ((double) OSC_PAL / 7 / 50 / 312 * 14 + 0.4); // 16*14=224
cycles_68k_vblock = (int) ((double) OSC_PAL / 7 / 50 / 312 * 22 + 0.4); // 4 sects, 4*22=88
cycles_68k_block = 6841; // (488*224+148)/16.0, -4
cycles_68k_vblock = 10682; // (88*488-148-68)/4.0, 0
lines_step = 14;
}
} else {
// M68k cycles/frame: 127840.71
cycles_68k_block = (int) ((double) OSC_NTSC / 7 / 60 / 262 * 14 + 0.4); // 16*14=224, 6831
cycles_68k_vblock = (int) ((double) OSC_NTSC / 7 / 60 / 262 * 19 + 0.4); // 2 sects, 2*19=38, 18544
cycles_68k_block = 6841; // (488*224+148)/16.0, -4
cycles_68k_vblock = 9164; // (38*488-148-68)/2.0, 0
lines_step = 14;
}
@ -565,7 +565,8 @@ static int PicoFrameSimple(void)
}
// render screen
if(!PicoSkipFrame) {
if (!PicoSkipFrame)
{
if (!(PicoOpt&0x10))
// Draw the screen
#if CAN_HANDLE_240_LINES
@ -580,6 +581,11 @@ static int PicoFrameSimple(void)
else PicoFrameFull();
}
// a gap between flags set and vint
pv->pending_ints|=0x20;
pv->status|=8; // go into vblank
SekRun(68+4);
// ---- V-Blanking period ----
// fix line counts
if(Pico.m.pal) {
@ -598,11 +604,8 @@ static int PicoFrameSimple(void)
lines_step = 19;
}
//dprintf("vint: @ %06x [%i]", SekPc, SekCycleCnt);
pv->pending_ints|=0x20;
if (pv->reg[1]&0x20) SekInterrupt(6); // Set IRQ
pv->status|=8; // go into vblank
if(Pico.m.z80Run && (PicoOpt&4)) // ?
if (Pico.m.z80Run && (PicoOpt&4))
z80_int();
while (sects) {

7
platform/readme.txt
View file

@ -227,6 +227,13 @@ Symbian:
Changelog
---------
1.332
+ Some new optimizations in memory handlers, and for shadow/hilight mode.
+ Added some hacks to make more games work without enabling "accurate timing".
* Fixed hang of NBA Jam (ingame saves do not work though).
* Adjusted timing for "accurate timing" mode and added preliminary VDP FIFO
emulation. Fixes Double Dragon 2, tearing in Chaos Engine and some other games.
1.33
* Updated Cyclone core to 0.0088.
+ Added A r k's usbjoy fix.