Home Page Forums MAME MAME ex- USSR and Soviet Bloc hardware

... apparently it is (ATAPI-1 standard allows "Initialize drive parameters" (aka Set Configuration) and "Execute drive diagnostic" while DRDY=0). Using a virtual disk for now, real hardware emulation is hard

Some games are now playable, f.e. a RiseOut clone:

Love this stuff. Back in the 80s US magazines were all about what we were missing from Japan (at least until the Amiga/ST/IIgs pretty much outclassed the PC88) but there was never any visibility into what was going on in the USSR and Eastern Europe, so it's great to finally see some of it.

I'd say that two major home platforms were Spectrum (rather, its many clones like the Pentagon) and BK series (BK-0010, BK-0011) -- market was flooded with former and the latter was mass-produced and could be actually bought in a shop. There's demoscene for both of these, see f.e. (Insult gigademo for the BK) and (showcase of several Spectrum demos from Assembly'2011).

The UKNC (on the screenshot) was an educational machine and I'm not sure how many were sold to general public; the DVK series (screenshots earlier in this thread) was a professional machine and generally wasn't available to the public at all. Of course, either could be 'obtained' if you really wanted it...

it was probably region-specific, haven't seen BKs here at home use.
people mostly had ZX clones, some Vector 06C (btw, ~1/3 of it's current MAME softlist made by my old RL friends), a bit of Lviv PK-01, and very few MSX clones.

Workin on Q-bus and slot devices for it. This is uknc booted from add-on IDE controller:



and yet another Tetris game (one of several for this machine, this one just looks nice )

Another Qbus hard disk controller -- very similar to MFM controller from DEC Pro; in fact, it is based on a clone of it, and has very similar API (CSR at 174000, vector 300, device name DW). HLE for now, if (when) its full dump surfaces, I may attempt to plug into 8x300 cpu core and mfmhd.cpp.

Second screenshot is of swiss-army knife tool, DESS.SAV (hex editor/assembler/disassembler -- edits memory, files and devices too).

good job!

Working on HLE of RX11 controller and RX01 device (to boot XXDP and run more diags, with more comfort):


Going to compare notes with Don North's emulator (http://www.vcfed.org/forum/showthread.php?51918-Is-there-an-RX01-Emulator/page5).

HLE is passing both of DEC tests (ZRXA and ZRXB), but I had to hack basicdsk.cpp to work around option_resolution::get_default() -- it is not yet reimplemented in c++:

Well, real life came calling and I have to put MAME on hold for a while. Pushed most of my WIP tree to github (https://github.com/shattered/mame/commits/gitwip), key parts are not committable unfortunately.

What's in there:

- K1801VM2 core (= severely hacked T11 core). This chip has no MMU.
- parts of chipset for this cpu (DEC DL11-compatible serial line unit, etc.)
- new bus (DEC Q-bus with add-ons to support uknc.cpp)
- new driver, ms1201.cpp (Electronika MS1201.02 single-board computer)
- de-skeletonized uknc.cpp, sans sound and floppy
- much improved DVK KCGD -- intelligent color graphics card, 800x480 px
- qbus devices:
-- DEC PC11 paper tape reader (no punch)
-- DEC RX11 floppy controller with RX01 drive (HLE)
-- virtual hard disk driver (not a real hardware device)
-- DVK KGD -- dumb monochrome framebuffer, 400x286 px
-- DVK KZD -- MFM harddisk controller (HLE, read-only)
-- UKNC ROM carts
-- UKNC IDE harddisk controller
-- skeletons of MX: and MZ: floppy controllers

What works and what doesn't:

- ms1201: 5 of 6 tests in ROM pass (remaining test is for unimplemented printer port)
- ms1201: boots and runs RT-11 SJ/FB monitors, XXDP+ small monitor
- ms1201: passes DEC VKAA, VKAB tests but fails VKAH (VKAC is supposed to fail). Passes equivalent tests 791401, 791402 but fails 791403, 791404
- uknc: passes ROM tests but fails many standalone tests
- both drivers run many games (text-only and graphical), see screeshots and videos earlier in the thread
- there's no softlist but a long TODO list for all of the above

There's also SIMH WIP tree at https://github.com/shattered/simh/tree/newwip -- based on Seth Morabito's 3B2 WIP, it adds simulation of AT&T DMD 5620 terminal, good enough to run GEBACA (screenshot).