57 lines
923 B
C
57 lines
923 B
C
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/* Intel 82335 SX emulation, used by the Phoenix 386 clone. */
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#include <stdint.h>
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#include "ibm.h"
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typedef struct
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{
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uint8_t reg_22;
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} i82335_t;
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i82335_t i82335;
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void i82335_write(uint16_t addr, uint8_t val, void *priv)
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{
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int i = 0;
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switch (addr)
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{
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case 0x22:
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i82335_t.reg_22 = val | 0xd8;
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if (val & 1)
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{
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for (i = 0; i < 8; i++)
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{
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mem_mapping_enable(&bios_mapping[i]);
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}
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}
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else
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{
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for (i = 0; i < 8; i++)
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{
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mem_mapping_disable(&bios_mapping[i]);
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}
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}
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break;
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case 0x23:
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if (val & 0x80)
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{
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io_removehandler(0x0022, 0x0001, i82335_read, NULL, NULL, i82335_write, NULL, NULL, NULL);
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}
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break;
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}
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}
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uint8_t i82335_read(uint16_t addr, void *priv)
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{
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}
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void i82335_init()
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{
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memset(i82335_t, 0, sizeof(i82335_t));
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i82335_t.reg_22 = 0xd9;
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io_sethandler(0x0022, 0x0014, i82335_read, NULL, NULL, i82335_write, NULL, NULL, NULL);
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}
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