collapseos/blk/811

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2020-06-12 14:01:24 -04:00
H@ ORG ! 0x7c00 BIN( ! ( BIOS loads boot bin at 0x7c00 )
2020-06-13 16:21:56 -04:00
JMPs, L1 FWRs ( start )
ORG @ 0x25 + HERE ! ( bypass BPB )
2020-06-12 14:01:24 -04:00
L1 FSET ( start )
CLI, CLD, AX 0x800 MOVxI, DS AX MOVsx, ES AX MOVsx,
SS AX MOVsx, STI,
AH 2 MOVri, DX 0 MOVxI, CH 0 MOVri, CL 2 MOVri, AL 12 MOVri,
BX 0 MOVxI, 0x13 INT, ( read sectors 2-14 of boot floppy )
( TODO: reading 12 sectors like this probably doesn't work
on real vintage PC/AT with floppy. Make this more robust. )
0x800 0 JMPf,
ORG @ 0x1fe + HERE ! 0x55 A, 0xaa A,