collapseos/blk/812

H@ ORG !
JMPs, L1 FWRs ( start )
L2 ( msg ) BSET ," Hello World!" 0 A,
L1 FSET ( start )
SI L2 @ ( msg ) MOVxi, AH 0x0e MOVri, ( print char )
L1 BSET ( loop ) LODSB, AL AL ORrr, ( end of str? )
JZ, L2 FWRs ( next ) 0x10 INT, ( print char )
JMPs, L1 ( loop ) BWR
L2 FSET ( next ) AH 0 MOVri, 0x16 INT, ( read kbd )
AH 0x0e MOVri, 0x10 INT, ( spit read char ) HLT, ( done )
pcat: use a far jump to boot into the OS Unless I misunderstood, this is supposed to set CS. This would make all SREG have the same value. This allows us to remove BIN( offset from os.bin. I've tried booting to offset 0, but it didn't seem to work. Let's settle for 0x8000. 512kb of system RAM is way more than we need anyways. 2020-06-14 10:06:51 +10:00			`H@ ORG !`
8086asm: tidy up a bit 2020-06-14 06:21:56 +10:00			`JMPs, L1 FWRs ( start )`
pcat: separate MBR code and OS code 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. 2020-06-14 05:35:16 +10:00			`L2 ( msg ) BSET ," Hello World!" 0 A,`
			`L1 FSET ( start )`
8086asm: clarify operands and fix stupidities 2020-06-14 07:58:42 +10:00			`SI L2 @ ( msg ) MOVxi, AH 0x0e MOVri, ( print char )`
pcat: separate MBR code and OS code 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. 2020-06-14 05:35:16 +10:00			`L1 BSET ( loop ) LODSB, AL AL ORrr, ( end of str? )`
8086asm: tidy up a bit 2020-06-14 06:21:56 +10:00			`JZ, L2 FWRs ( next ) 0x10 INT, ( print char )`
			`JMPs, L1 ( loop ) BWR`
pcat: separate MBR code and OS code 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. 2020-06-14 05:35:16 +10:00			`L2 FSET ( next ) AH 0 MOVri, 0x16 INT, ( read kbd )`
			`AH 0x0e MOVri, 0x10 INT, ( spit read char ) HLT, ( done )`