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Found some Force Computers manuals at mvme.com, could be useful.

In particular, CPU-30 rev.4 manual describes the 68230 PIT

Last edited by shattered; 08/02/12 08:52 PM.
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Originally Posted By shattered
With a bit of hackery, mc1502 how has diskette I/O. This machine had the usual cloned MS-DOS (nee Sigma-Four DOS) and something original called OTS (One Track System), for low-memory (128K) machines. DOS runs, OTS boots but hangs.


Apparently, all existing dumps of OTS are bad -- there were extra tracks on original disks and boot loader is looking for them.

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Originally Posted By shattered
UK-NC -- school computer (was not available in stores). Two CPUs (second CPU used for I/O, sound etc.) with PDP-11 instruction set, color graphics, sound, integrated keyboard, serial networking. Teacher's workstation also had dual 5" floppy drives, printer, and (sometimes) color monitor; several RT-11-derived operating systems were available, and lots of commercial educational software.


Hackers over at zx.pk.ru [1] have found a hidden/poorly documented color mode (8 fixed palettes of 8 colors at low and high intensity, selectable for individual scan lines) and there's talk of porting/writing games for this hardware :-)

[1] http://zx.pk.ru/showpost.php?p=570148&postcount=80

Mock-up screenshots:




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That's a nifty hack smile

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And I think they're serious about porting Mario...

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They "port" the screenshots, not the actual games, just to demonstrate the palette.

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I was talking about another forum thread -- http://zx.pk.ru/showthread.php?t=20758 (yes, I know that forum talk is cheap)

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Some kind soul dumped keyboard ROMs from iskr1030 and ec184x.

iskr1030 -- uses a i8035 clone, ROM dump: http://chukaev.ru54.com/firmware/i1030.zip, pics: http://ru.pc-history.com/klaviatura-pevm-iskra-1030.html, schematic: http://ru.pc-history.com/wp-content/uploads/Shema_klaviaturi_ISKRA-1030.jpg

ec184x -- "EC1841\1816BE48.BIN" attached to forum post http://zx.pk.ru/showpost.php?p=303758&postcount=83 (1816BE48 is a clone of i8048)

Last edited by shattered; 02/11/13 07:41 PM. Reason: pics
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Originally Posted By shattered
Someone asked Haze about emulation status of terminal that Tetris originally ran on -- http://mamedev.emulab.it/haze/2012/05/31/emulation-status/#comment-22334

It's the 15IE-00-013, and is not emulated. There's a technical manual, not sure if ROMs are already dumped.


Program ROMs (three versions) have been dumped [1], and disassembly looks sane [2]. Now to write CPU core...

[1] http://zx.pk.ru/showpost.php?p=577018&postcount=21
[2] https://gist.github.com/shattered/4971416

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... and here's a WIP screenshot of an emulated 15IE talking to chargen TCP service:



Now to locate the original Tetris...

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