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.
19 lines
258 B
Plaintext
19 lines
258 B
Plaintext
SEVEN_SEG = $7ff0
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UART = $7ff4
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UART_TXB = UART
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UART_RXB = UART
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UART_STATUS = UART + 1
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LED = $7ff6
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SW = LED
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MM_CTRL = $7ff7
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MM_DATA = $7fe0
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SD_ARG = $7ff8
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SD_CMD = $7ffc
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SD_DATA = $7ffd
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IRQ_STATUS = $7fff
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