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Added CPU external cache enable/disable for the SiS 471, SiS 496/497, and Intel 4x0 chipsets.

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This commit is contained in:
OBattler
2019-10-21 03:47:44 +02:00
parent c6ee6f48de
commit 7e8efb29fd
3 changed files with 35 additions and 5 deletions
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21
src/chipset/intel_4x0.c
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@@ -8,7 +8,7 @@
*
* Implementation of the Intel PCISet chips from 420TX to 440FX.
*
* Version: @(#)intel_4x0.c 1.0.1 2019/10/19
* Version: @(#)intel_4x0.c 1.0.2 2019/10/21
*
* Authors: Sarah Walker, <http://pcem-emulator.co.uk/>
* Miran Grca, <mgrca8@gmail.com>
@@ -21,6 +21,7 @@
#include <string.h>
#include <wchar.h>
#include "../86box.h"
#include "../cpu/cpu.h"
#include "../mem.h"
#include "../io.h"
#include "../rom.h"
@@ -118,6 +119,17 @@ i4x0_write(int func, int addr, uint8_t val, void *priv)
}
break;
case 0x52: /*Cache Control Register*/
#if defined(DEV_BRANCH) && defined(USE_I686)
if (dev->type < INTEL_440FX) {
#endif
cpu_cache_ext_enabled = (val & 0x01);
cpu_update_waitstates();
#if defined(DEV_BRANCH) && defined(USE_I686)
}
#endif
break;
case 0x59: /*PAM0*/
if ((dev->regs[0x59] ^ val) & 0xf0) {
i4x0_map(0xf0000, 0x10000, val >> 4);
@@ -305,6 +317,13 @@ static void
if (i4x0->type >= INTEL_430FX)
i4x0->regs[0x72] = 0x02;
#if defined(DEV_BRANCH) && defined(USE_I686)
if (i4x0->type == INTEL_440FX) {
cpu_cache_ext_enabled = 1;
cpu_update_waitstates();
}
#endif
pci_add_card(0, i4x0_read, i4x0_write, i4x0);
return i4x0;