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.
66 lines
1.1 KiB
C
66 lines
1.1 KiB
C
#ifndef _O65_H
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#define _O65_H
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#include <stdint.h>
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#define O65_NON_C64 0x0001
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#define O65_MAGIC_0 0x6f
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#define O65_MAGIC_1 0x36
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#define O65_MAGIC_2 0x35
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#define O65_OPT_FILENAME 0
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#define O65_OPT_OS 1
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#define O65_OPT_ASSEMBLER 2
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#define O65_OPT_AUTHOR 3
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#define O65_OPT_DATE 4
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#define O65_OS_OSA65 1
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#define O65_OS_LUNIX 2
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#define O65_OS_CC65 3
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#define O65_OS_OPENCBM 4
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#define O65_OS_SUPER6502 5
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typedef union {
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struct {
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int cpu : 1;
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int reloc : 1;
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int size : 1;
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int obj : 1;
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int simple : 1;
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int chain : 1;
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int bsszero : 1;
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int cpu2 : 4;
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int align : 2;
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};
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uint16_t _mode;
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} o65_mode_t;
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typedef struct {
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uint16_t c64_marker;
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uint8_t magic[3];
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uint8_t version;
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o65_mode_t mode;
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uint16_t tbase;
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uint16_t tlen;
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uint16_t dbase;
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uint16_t dlen;
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uint16_t bbase;
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uint16_t blen;
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uint16_t zbase;
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uint16_t zlen;
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uint16_t stack;
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} o65_header_t;
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typedef struct {
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uint8_t olen;
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uint8_t type;
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uint8_t data[1]; //This is actually variable length
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} o65_opt_t;
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void o65_print_option(o65_opt_t* opt);
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#endif
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