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FINALLY Added Disk support!!! f_disk.c name explanation in README.md

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Disk reading only, but it works!
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Tom-on
2024-04-09 20:18:03 +02:00
parent eb97401ac0
commit 78367d56d6
10 changed files with 67 additions and 15 deletions
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src/kernel/f_disk.c
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#include "disk.h"
#include "stdint.h"
#include "system.h"
#define PIO_PORT 0x1f0
void diskRead(uint8_t sector, uint8_t sectorCount, uint8_t drive, char* dst) {
outb(PIO_PORT + 6, (drive & 0x0f) | 0xa0); // Head and drive number port
outb(PIO_PORT + 2, sectorCount); // Sector count
outb(PIO_PORT + 3, sector); // Sector to start reading at
outb(PIO_PORT + 4, 0); // Cylinder number low
outb(PIO_PORT + 5, 0); // Cylinder number high
outb(PIO_PORT + 7, 0x20); // Command register, 0x20 - Read with retry
while (inb(PIO_PORT + 7) == 8); // Status register, wait until ready
uint32_t i = 512 * sectorCount;
while (i > 0) {
uint16_t data = inw(PIO_PORT); // Data port
*dst++ = (uint8_t)(data);
*dst++ = (uint8_t)(data >> 8);
i--;
}
}
void diskWrite(uint8_t sector, uint8_t sectorCount, uint8_t drive, const char* src);