6 Commits

Author	SHA1	Message	Date
Virgil Dupras	5a77b80d3d	emul/8086/pcat: fix broken int13h logic ... I had forgotten that heads index increment before track index.	2020-10-25 12:21:44 -04:00
Virgil Dupras	ba21b6a9f5	emul/8086: add PC/AT emulator	2020-10-25 10:27:52 -04:00
Virgil Dupras	8bf6258673	Add word TICKS ... Adding a delay such as the 20ms one we have in AVR programmer's initialization routine is tricky without a word like TICKS. This implementation is highly inaccurate, but more accurate and reliable than a "ballpark" DO..LOOP...	2020-09-25 17:31:06 -04:00
Virgil Dupras	25a35cf28e	Move 8086 boot code from B800 to B440 ... That slims down blkfs a lot.	2020-09-21 20:09:42 -04:00
Virgil Dupras	b21be43535	Move 8086 assembler from B730 to B30 ... Also, move doc to doc/asm.txt. Also, fix the pcat recipe which was broken since the overlay change. I hadn't noticed it because I didn't have to rebuild the MBR.	2020-09-21 19:24:54 -04:00
Virgil Dupras	fea9beac1e	recipes/pcat: move recipe blocks into local overlay	2020-09-20 20:48:52 -04:00