f3c7ac9696
Instead of using the bootsector to load a bootloader, just put the bootloader in the ROM and call it a day. It looks for a file on the SD card in the root directory named `kernel.bin` and loads it into memory. This is not a perfect solution, as the kernel will grow larger and the kernel load address will have to change. At this point I could add back the bootloader, but that is for later. Also the bootloader is just a copy of the kernel, so that can be trimmed down a lot.
24 lines
405 B
C
24 lines
405 B
C
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#include <stdint.h>
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#include <conio.h>
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#include "devices/interrupt.h"
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#include "devices/uart.h"
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char lastchar;
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void handle_irq() {
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uint8_t status;
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status = irq_get_status();
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if (status & BUTTON) {
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cputs("Button Interrupt!\n");
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irq_set_status(status & ~BUTTON);
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}
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if (status & UART) {
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lastchar = uart_rxb();
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irq_set_status(status & ~UART);
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}
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} |