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https://gist.github.com/shattered/7517008 -- minor WIP for besta, mc1502 and mikrosha.
http://www.sendspace.com/file/lblltk -- the new dump

A good dump of 'One-Track System' (works in mc1502, but apparently was designed for poisk1) surfaced (thanks to dk_spb) -- this is a weird, somewhat DOS-compatible OS, that fits on a single disk track (which is track 82 and therefore is missing from all existing dumps). Will softlist it soon:

That's awesome!

BTW, would anyone object if T11 core disassember switched to octal instead of hex? All of DEC's assemblers use octal, IIRC.

https://gist.github.com/shattered/7682631 -- replaces OTS with a good dump, adds a dump of M86 (CP/M-86 clone)
http://www.sendspace.com/file/9luqne and http://www.sendspace.com/file/gqx0z8 -- the software itself

poisk1 WIP, displaying magic '3-color' text mode (background, foreground and alternate foreground).


This machine did not have a mc6845 but still managed to emulate most of CGA capabilities. Notably, it did not have a native text mode; when one is set via BIOS call, writes to lower half of video memory cause a NMI and ISR then draws pixels into upper half. Bit 7 in every character cell is magic and selects 'alternate foreground' color for that cell.

Nice work!

Thanks. pc.c is getting less and less maintainable though. Plus, to support option cards I'd need to add a bus, correct?

Correct. And yes, pc.c needs systems which aren't 100% PC compatible to get moved out.

Yet another XT clone -- EC 1847, this one Bulgarian. There are ROMs, pics and brief tech manual here: http://zx.pk.ru/showthread.php?t=15239

Apparently this box has two ISA buses and internal bus expander, which we don't emulate and POST thus fails (code 1801). Will submit a skeleton soon.

I think that's a VME bus, not ISA