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Ran across the PRT-MPF printer for the MicroProfessor 1b (mpf1b), and it looks pretty simple.

It's actually quite a simple design, the carriage moves forward and then returns while feeding the paper for a single line.

Two io addresses are used, CA and CB where one address controls the motor and the thermal head elements, and the other reads the home position and the motor "tacho generator pulse".

I managed to get it to do something that looks recognizable:

It seems that the μPD7730 or μPD77C30 might be the only chip that functions as a dedicated ADPCM encoder - the other chips are either decoders or general purpose DSPs. I can only find a 2 page datasheet about this chip although I have not looked in the product catalogs yet.

I also found a diagram on page 5 of this 7751 datasheet that shows how the audio samples are mapped to ADPCM codes.

MAME 0.272

The end of the year is almost upon us, but before that happens, make sure you try MAME 0.272! We’re very happy to announce that the early SNK game Tangram Q is now supported. This game was never widespread, and working examples are rarer than ever. MAME now gives you the unprecedented opportunity to experience this piece of gaming history. Another obscure system that’s starting to take shape is the Estonian EKTA Juku. This 8-bit educational computer was powered by a Soviet 8080 clone and ran the CP/M-derived EKDOS operating system.

The French Thomson computers have been receiving some attention lately, and software compatibility is starting to improve. Progress on the NEC PC-98 family is still coming along nicely. Our CD-ROM drive emulation has been getting better, which has a positive impact on numerous computers as well as game systems. The Epoch Super Cassette vision also got some nice fixes this month.

Numerous reported issues were fixed in this release, including some long-standing issues that had eluded developers for years. There are lots of new working bootleg arcade games to try out. Several TV games have been promoted to working this month, too.

You can read about all the exciting work that went into this release in the whatsnew.txt file. As always, the source code and 64-bit Windows binary packages are available on the download page.

Read the rest of this entry »

I've added support for the RIPPLE IDE controller for the Amiga 2000/3000/4000. It's a modern controller supporting drives up to 2 TB and also allows booting from CD-ROM. Here's a screenshot where I've hooked up a 40 GB CHD:



This is using Amiga OS 3.2.2 as the original versions from Commodore or Amiga Technologies don't support drives as large.

You can also update it's firmware from inside MAME:

MAME is now the first emulator capable of running PC-98 Lemmings without having to fiddle with the arcane CLI options.







And by arcane I really mean it, doesn't help that it has very high conventional memory requirements so nothing I tried really worked, looks one of those things that only a manual can tell for good ...

Yeah, one of the things I fixed earlier in this thread was like that. If you pass a value as an enum type it's gonna assume only the defined values are valid. Which is definitely smarter than compilers used to be about that stuff.

Along the SB16 LLE improvements I've bothered to check why MSCDEX DOS redbook didn't work.
Say hello to sjgplay, which is an open source audio CD DOS player.
Fixing this problem also means fixing hiccups/no redbook in games that uses it (zyclunt).



It's "working" as far as base playback goes, it has issues like with pausing or using the intro feature, to not mention that is supposed to read Karaoke CD+G format too ...

There's full in-depth documentation for the amstrad available if someone feels like it.

https://shaker.logonsystem.eu/ACCC1.8-EN.pdf

To answer my own question, the 64-bit Objective-C implementation is interoperable with C++ exceptions - a catch-all block in either language will catch exceptions from both languages, and destructors and finally blocks are honoured for exceptions from both languages.

That's a modern nerd toy, but there was a commercial port of V7 UNIX (Demos) to more powerful clone hardware (with memory management and tty lines). There's an old SIMH fork that runs it.

Installing OS/2 Warp 3 in pc9821ap2 (part 2).
Press ESC to return back to a previous step.

14. Device select.
The ones on top row are Code Page and JIS arrangement
middle row is serial support (yes), keyboard (98 keys), graphic adapter (PEGC at 256 colors)
Bottom row is APM (none), PCMCIA (no), CD-ROM, Printer (do not install default printer), Music adapter (PC-9821 A Mate), SCSI (no).
ETA: at current time there's a bug that will list CD-ROM as その他 (others), eventually leading to the media missing when installed. Going in CD select and select PC CD-101 should fix this inconvenient.



Most of the stuff not automatically detected isn't supported at the time of this writing, so just click on bottom left button to go on.

15. OS component select. Bottom right box is available space (top) vs. required (bottom).
Pressing (R) button will go "Recommended", which gets rid of most fonts packages and マルチメディアのソフトウェアのサポート (Multimedia Software Support), (A) button will install everything. Going R then re-enabling the extra Multimedia pack will trim down installation to 38-ish MB.
Press (I) button to install.


16. "Expansion Options". Not sure what this setting does, the other two are always greyed out (open preference then modem service options?). Press left button to continue.


17. Ready to be greeted with the OS/2 install progress bar.


18. Once done, it will prompt to this screen, that suggests to change system defaults. Press left button to go "End" and soft reset.




19. Finally ready to use the OS

Yeah there's a lot of missing stuff in Rapid River. But wow that's some mind-blowing and totally *amazing* camera work in those vids lol! Pity I no longer have the board I dumped or I would make a proper video of it.

After a fix by crazyc this should be working again in the next release.