12 Commits

Author	SHA1	Message	Date
Virgil Dupras	8cc8df0446	pcat: add native _find	2020-06-19 07:56:54 -04:00
Virgil Dupras	6b07296d30	pcat: more native words	2020-06-18 19:06:53 -04:00
Virgil Dupras	a92864a595	pcat: implement RSP mechanism in execution model	2020-06-16 20:41:53 -04:00
Virgil Dupras	dabbd6c253	8086asm: add support for modrm 8-bit displacement	2020-06-15 06:52:47 -04:00
Virgil Dupras	1a467efae1	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.	2020-06-13 20:06:51 -04:00
Virgil Dupras	507c2c12e7	8086asm: clarify operands and fix stupidities	2020-06-13 17:58:42 -04:00
Virgil Dupras	5033f17be2	8086asm: tidy up a bit	2020-06-13 16:21:56 -04:00
Virgil Dupras	07e50313c7	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.	2020-06-13 15:35:16 -04:00
Virgil Dupras	e17f2e6907	pcat: read sector from floppy	2020-06-13 13:29:04 -04:00
Virgil Dupras	b037c86598	recipes/pcat: now tested on real hardware!	2020-06-13 11:47:32 -04:00
Virgil Dupras	66b27b0790	8086asm: properly initialize DS and DF	2020-06-12 19:07:23 -04:00
Virgil Dupras	177750c928	recipes/pcat: first steps into 8086!	2020-06-12 14:03:31 -04:00