49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
#pragma once
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#include <stdint.h>
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typedef struct Drive Drive;
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typedef void (*DriveReadFn)(Drive* drive, uint8_t* block, uint16_t i);
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typedef void (*DriveWriteFn)(Drive* drive, const uint8_t* block, uint16_t i);
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struct Drive {
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void* self;
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uint16_t block_size;
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uint16_t block_amount;
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DriveReadFn read;
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DriveWriteFn write;
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};
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typedef enum {
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InterruptType_None,
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InterruptType_Shutdown,
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InterruptType_KeyEvent,
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} InterruptType;
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typedef struct {
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InterruptType type;
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union {
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uint16_t keycode;
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};
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} Interrupt;
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#define VCD_BUFFER_OFFSET 0x0c00
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#define VCD_BUFFER_SIZE 480
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#define VCD_SCREEN_WIDTH 40
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#define VCD_SCREEN_HEIGHT 12
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typedef struct IODevice IODevice;
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typedef void (*IODeviceSetCharFn)(
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IODevice* device, uint16_t offset, uint8_t value);
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typedef void (*IODeviceWaitForInterruptFn)(IODevice* device);
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typedef Interrupt (*IODeviceMaybeNextInterruptFn)(IODevice* device);
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struct IODevice {
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void* self;
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IODeviceSetCharFn set_char;
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IODeviceWaitForInterruptFn wait_for_interrupt;
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IODeviceMaybeNextInterruptFn maybe_next_interrupt;
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};
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void vm_start(Drive* boot_drive, IODevice* io_device);
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