7 Commits

Author	SHA1	Message	Date
Virgil Dupras	705d68deec	Move most of the high layer of comp core into the low one ... With KEY and EMIT being switch words, most of the high layer can be defined before drivers. In addition to this change, I've compacted core blocks which were becoming quite sparse.	2020-10-28 18:18:00 -04:00
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