collapseos/blk/753

: MOVri, SWAP 0xb0 OR A, A, ;
: MOVrI, SWAP 0xb0 OR A, SPLITB A, A, ;
: MOVsx, 0x8e A, SWAP MODRMrr A, ;
: INT, 0xcd A, A, ;
( no argument, flow ops are special )
: JMP8, 0xeb A, ; : JMP16, 0xe9 A, ; : JZ, 0x74 A, ;
: JMPr, 0xff A, 7 AND 0xe0 OR A, ;
: LODSB, 0xac A, ; : CLI, 0xfa A, ; : HLT, 0xf4 A, ;
: STI, 0xfb A, ;
: ORrr, 0x08 A, MODRMrr A, ;
: XORxx, 0x31 A, MODRMrr A, ;
: CLD, 0xfc A, ; : STD, 0xfd A, ;
8086asm: first steps 2020-06-13 00:49:27 +10:00			`: MOVri, SWAP 0xb0 OR A, A, ;`
8086asm: begin adding MODRM-enabled ops 2020-06-13 02:07:48 +10:00			`: MOVrI, SWAP 0xb0 OR A, SPLITB A, A, ;`
8086asm: properly initialize DS and DF 2020-06-13 09:07:23 +10:00			`: MOVsx, 0x8e A, SWAP MODRMrr A, ;`
8086asm: add 8-bit JMP, MOVrI, INT, Verified against nasm with equivalent code. 2020-06-13 01:29:00 +10:00			`: INT, 0xcd A, A, ;`
			`( no argument, flow ops are special )`
8086asm: now enough tooling to assemble a PC/AT Hello World boot 2020-06-13 03:12:41 +10:00			`: JMP8, 0xeb A, ; : JMP16, 0xe9 A, ; : JZ, 0x74 A, ;`
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			`: JMPr, 0xff A, 7 AND 0xe0 OR A, ;`
8086asm: now enough tooling to assemble a PC/AT Hello World boot 2020-06-13 03:12:41 +10:00			`: LODSB, 0xac A, ; : CLI, 0xfa A, ; : HLT, 0xf4 A, ;`
recipes/pcat: now tested on real hardware! 2020-06-14 01:47:32 +10:00			`: STI, 0xfb A, ;`
8086asm: begin adding MODRM-enabled ops 2020-06-13 02:07:48 +10:00			`: ORrr, 0x08 A, MODRMrr A, ;`
8086asm: properly initialize DS and DF 2020-06-13 09:07:23 +10:00			`: XORxx, 0x31 A, MODRMrr A, ;`
			`: CLD, 0xfc A, ; : STD, 0xfd A, ;`