b78b2fecaa
Cleaned up floppy code a lot and reverted to single poller; Fixed segment present bit and limit checking at read/write within segment; The ASUS boards now have memregs too; RTC code improved based on suggestion by Sarah Walker; Fixed SVGA odd/even emulation and added chain odd/even support; Removed non-existent CPU's.
82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
#include "ibm.h"
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#include "cpu.h"
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#include "io.h"
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#include "mem.h"
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#include "pit.h"
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#include "timer.h"
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#include "intel.h"
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uint8_t batman_brdconfig(uint16_t port, void *p)
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{
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// pclog("batman_brdconfig read port=%04x\n", port);
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switch (port)
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{
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case 0x73:
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return 0xff;
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case 0x75:
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return 0xdf;
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}
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return 0;
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}
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static uint16_t batman_timer_latch;
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static int64_t batman_timer = 0;
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static void batman_timer_over(void *p)
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{
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batman_timer = 0;
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}
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static void batman_timer_write(uint16_t addr, uint8_t val, void *p)
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{
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if (addr & 1)
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batman_timer_latch = (batman_timer_latch & 0xff) | (val << 8);
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else
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batman_timer_latch = (batman_timer_latch & 0xff00) | val;
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batman_timer = batman_timer_latch * TIMER_USEC;
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}
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static uint8_t batman_timer_read(uint16_t addr, void *p)
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{
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uint16_t batman_timer_latch;
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cycles -= (int)PITCONST;
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timer_clock();
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if (batman_timer < 0)
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return 0;
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batman_timer_latch = batman_timer / TIMER_USEC;
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if (addr & 1)
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return batman_timer_latch >> 8;
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return batman_timer_latch & 0xff;
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}
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void intel_batman_init()
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{
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io_sethandler(0x0073, 0x0001, batman_brdconfig, NULL, NULL, NULL, NULL, NULL, NULL);
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io_sethandler(0x0075, 0x0001, batman_brdconfig, NULL, NULL, NULL, NULL, NULL, NULL);
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io_sethandler(0x0078, 0x0002, batman_timer_read, NULL, NULL, batman_timer_write, NULL, NULL, NULL);
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timer_add(batman_timer_over, &batman_timer, &batman_timer, NULL);
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}
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uint8_t endeavor_brdconfig(uint16_t port, void *p)
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{
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// pclog("endeavor_brdconfig read port=%04x\n", port);
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switch (port)
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{
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case 0x79:
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return 0xff;
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}
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return 0;
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}
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void intel_endeavor_init()
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{
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io_sethandler(0x0079, 0x0001, endeavor_brdconfig, NULL, NULL, NULL, NULL, NULL, NULL);
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}
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