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Came across the TRS-80 Portable Terminal PT-210 and so far I'm able to type on it.

Oddly, the keyboard matrix is basically "in order", seeming to match the table in rom.


It uses the i8039, the i8251, the i8279, and the i8243.

So we don't know if that really is the EPN3116C in the AIM-65... Whatever it is in the AIM-65, it has 10 input lines, and an odd/even select set of two enable pins to choose one set of 10 of the 20 thermal heads; the aim-65 printer has a motor which oscillates the 20 heads back and forth in a serpentine pattern, and has a sort of 'hblank' state from the motor showing either a tachometer style feedback, and/or a pulse when it reaches the beginning of its cycle.

Schematics of the AIM-65 printer

http://retro.hansotten.nl/6502-sbc/aim-65/aim-65-40/

edit: oh that's a different unit

from an article:

The AIM-65 computer motherboard also sports a very interesting and compact Thermal
Printer module, made by Shimadzu in Kyoto, Japan. Their company goes back to the
1870’s and they became experts in high quality medical electronics. This extraordinary,
compact and brilliant printer module was also used in equipment made by Tektronix. It
is the subject of another article I’m working on, under construction. This printer is worthy
of an article all on its own. It is quite an exceptional little machine).



Schematic of the aim65 printer interface is in the user's guide, page 7-21 along with a detailed explanation of how the printhead works.


https://www.commodore.ca/wp-content/uploads/2018/11/rockwell-aim65-user-manual.pdf


how to print graphics on the aim65 printer:

http://archive.6502.org/publications/aiminteractive/aim_interactive_2.pdf

The printer in the Rockwell (later Dynatem) AIM-65 might also be using the EPN3116C, but I can't find schematics of the printer itself offhand.
(This is also not yet hooked up in MAME)

Yesterday I found I/O ports for the NEC 765 and a 8255 in the Floppy disk controller card.
How would I have to do to define the bus, please? This way I could start with the development of the FDC card.

Thank you in advance!

I never bother with that forum now since it's owned and run by the new Atari owners. Too much censorship going on there. To them emulation is evil and roms are illegal.
Not sure why you would even bother posting TI99 stuff there, let alone anything MAME related.
Keep MAME wip here where there are people interesting in emulation.

Some different percentage indicators for Guru.

I came across the TI-99 PHP1900 Thermal Printer and thought I'd give it a try.

I made a thread over at atari age forums if you're curious.

https://forums.atariage.com/topic/381636-php1900-printer-emulation/

Update to OG's compressor work at 0.277 (mame0277-165-gd7c5398bd5d)

I don't remember it was a while ago that I worked on it. Just try some stuff and see what doesn't work.

Hello people,

I heard the emulation of the DS 2069 is still unfinished since Helmut passed away. I think I can provide a window of opportunity to finish this machine. What are the pending tasks that remain to be done with this computer?
Is there anything else from this family of computers that requires attention?

Please, would anybody from the developers who worked on them willing to continue the work if a source of information was found?

Thank you all,
Jaume

I still don't know, the part still has to arrive. Still, considering it has an independent clock from the motherboard I don't think it overlays, but replaces it.

The biggest lift there is going to be just defining and attaching the bus. Does this card completely replace the motherboard's video or overlay it? Taking completely over a system's built-in video from a bus card is very doable, I just did it in 0.277.

I am thinking about the word-processing card, and it will be a challenge for me. In the first place, it is an optional device, so it will require the pre-ISA bus to be defined. In the second place, it contains a second 8275 CRTC so it means it will generate a "second screen". Finally, that it intercepts the video signal of the motherboard and possibly disables it to supplant it with the second field generated by the auxiliary CRTC. I know there will be some time before this piece of hardware reaches me, but I would like to have some idea of how to treat it when it arrives. Please, could anybody give me some piece of advice or guides on how to proceed with the foresaid stuff?

Thank you in advance!

I have acquired a word-editor card. When I receive it, I will study it in order to bring it to MAME.