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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:


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That's awesome!

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

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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

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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.

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Nice work!

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

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

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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.

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I think that's a VME bus, not ISA

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