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07e50313c7
MBR code now strictly loads OS code into memory and jumps into it. Now, I've got to consolidate my assembler code, modrm logic is messed up.
11 lines
386 B
Plaintext
11 lines
386 B
Plaintext
H@ ORG ! 0x7c00 BIN( ! ( BIOS loads boot bin at 0x7c00 )
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JMP8, L1 FWR8 ( start )
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ORG @ 0x25 + HERE ! ( bypass BPB )
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L1 FSET ( start )
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CLI, CLD, AX AX XORxx, DS AX MOVsx, ES AX MOVsx,
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SS AX MOVsx, SP 0xffff MOVrI, STI,
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AH 2 MOVri, DX 0 MOVrI, CH 0 MOVri, CL 2 MOVri, AL 1 MOVri,
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BX 0x8000 MOVrI, 0x13 INT, ( read 2nd sector of boot floppy )
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BX JMPr,
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ORG @ 0x1fe + HERE ! 0x55 A, 0xaa A,
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