claunia/86Box
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Rewritten parts of the 86F handler to minimize false CRC errors and misidentification of sectors;

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Replaced IMG handler with one that now proxies to the 86F handler;
Applies the remaining Mainline PCem speedup commit;
Fixed the National Semiconductors PC87306 Super I/O Chip's serial port IRQ assignment;
DMF images are now loaded with the correct sector interleave, improving read/write speed;
XDF images are now loaded in a way that emulates the real order of the sectors on the track, improving read/write speed;
Added 16-bit physical memory read/write routines (mem_phys_readw, mem_phys_writew) and modified the 16-bit DMA code to use them instead of two 8-bit reads/writes.
This commit is contained in:
OBattler
2016-09-22 21:22:56 +02:00
parent 0ae428b5f5
commit 6318e2bb17
24 changed files with 1688 additions and 513 deletions
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7
src/x87_ops_misc.h
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@@ -32,6 +32,7 @@ static int opFINIT(uint32_t fetchdat)
FP_ENTER();
cpu_state.pc++;
cpu_state.npxc = 0x37F;
cpu_state.new_npxc = (cpu_state.old_npxc & ~0xc00);
cpu_state.npxs = 0;
*(uint64_t *)cpu_state.tag = 0x0303030303030303ll;
cpu_state.TOP = 0;
@@ -96,6 +97,7 @@ static int FSTOR()
case 0x000: /*16-bit real mode*/
case 0x001: /*16-bit protected mode*/
cpu_state.npxc = readmemw(easeg, cpu_state.eaaddr);
cpu_state.new_npxc = (cpu_state.old_npxc & ~0xc00) | (cpu_state.npxc & 0xc00);
cpu_state.npxs = readmemw(easeg, cpu_state.eaaddr+2);
x87_settag(readmemw(easeg, cpu_state.eaaddr+4));
cpu_state.TOP = (cpu_state.npxs >> 11) & 7;
@@ -104,6 +106,7 @@ static int FSTOR()
case 0x100: /*32-bit real mode*/
case 0x101: /*32-bit protected mode*/
cpu_state.npxc = readmemw(easeg, cpu_state.eaaddr);
cpu_state.new_npxc = (cpu_state.old_npxc & ~0xc00) | (cpu_state.npxc & 0xc00);
cpu_state.npxs = readmemw(easeg, cpu_state.eaaddr+4);
x87_settag(readmemw(easeg, cpu_state.eaaddr+8));
cpu_state.TOP = (cpu_state.npxs >> 11) & 7;
@@ -676,6 +679,7 @@ static int FLDENV()
case 0x000: /*16-bit real mode*/
case 0x001: /*16-bit protected mode*/
cpu_state.npxc = readmemw(easeg, cpu_state.eaaddr);
cpu_state.new_npxc = (cpu_state.old_npxc & ~0xc00) | (cpu_state.npxc & 0xc00);
cpu_state.npxs = readmemw(easeg, cpu_state.eaaddr+2);
x87_settag(readmemw(easeg, cpu_state.eaaddr+4));
cpu_state.TOP = (cpu_state.npxs >> 11) & 7;
@@ -683,6 +687,7 @@ static int FLDENV()
case 0x100: /*32-bit real mode*/
case 0x101: /*32-bit protected mode*/
cpu_state.npxc = readmemw(easeg, cpu_state.eaaddr);
cpu_state.new_npxc = (cpu_state.old_npxc & ~0xc00) | (cpu_state.npxc & 0xc00);
cpu_state.npxs = readmemw(easeg, cpu_state.eaaddr+4);
x87_settag(readmemw(easeg, cpu_state.eaaddr+8));
cpu_state.TOP = (cpu_state.npxs >> 11) & 7;
@@ -716,6 +721,7 @@ static int opFLDCW_a16(uint32_t fetchdat)
tempw = geteaw();
if (cpu_state.abrt) return 1;
cpu_state.npxc = tempw;
cpu_state.new_npxc = (cpu_state.old_npxc & ~0xc00) | (cpu_state.npxc & 0xc00);
CLOCK_CYCLES(4);
return 0;
}
@@ -728,6 +734,7 @@ static int opFLDCW_a32(uint32_t fetchdat)
tempw = geteaw();
if (cpu_state.abrt) return 1;
cpu_state.npxc = tempw;
cpu_state.new_npxc = (cpu_state.old_npxc & ~0xc00) | (cpu_state.npxc & 0xc00);
CLOCK_CYCLES(4);
return 0;
}