Hi everyone.

Found another one (maybe).
The Televideo PM/286 has an "HIGH RES COLOR GRAPH" card.

It can do high-res CGA in 640x200 and 640x400.
As well as 4 color CGA in 320x200 and 320x400.

Not sure if it isn't simple scan-doubling, though.
Judging by the pictures/videos, it might be real 400 line support.

https://www.vintagecomputer.net/browse_thread.cfm?id=252

https://www.youtube.com/watch?v=Cob8tWlmgaI

Grzyb wrote on 2023-03-24, 21:47:

AT&T 6300 High Res

The AT&T 6300 machine is identical to Xerox 6060 and Logabax Persona 1600, they all are rebadged Olivetti M24.

1ST1 wrote on 2025-04-22, 07:51:

Grzyb wrote on 2023-03-24, 21:47:

AT&T 6300 High Res

The AT&T 6300 machine is identical to Xerox 6060 and Logabax Persona 1600, they all are rebadged Olivetti M24.

Thank you very much for the info! ^^
The Xerox 6060 is a fascinating piece of equipment, I think.

Quick update. The Cordata WPC Bridge was an IBM PC+Apple II combo system.
The PC side supported Olivetti graphics, probably in order to drive the built-in monitor.
The line-doubling helped to be able use a single monitor frequency, I assume.
I've attached an ad I've found, because it's a rare computer.

Links:
https://forums.atariage.com/topic/282743-this … -ibm-pc-in-one/
https://bitsavers.org/pdf/cordata/brochures/C … -WPC-Bridge.pdf

Jo22 wrote on 2025-05-09, 23:59:

The line-doubling helped to be able use a single monitor frequency, I assume.

I don't think this is the primary reason. Both CGA and the Apple II used NTSC video output, so plain CGA and Apple II match up perfectly at the same monitor frequency of around 15kHz. On the other hand, this computer seems to target the professional market, not gaming, so text display quality matters. The Olivetti 400-line CGA design allows using a 8x16 character box instead of the 8x8 character box of standard CGA which is a notable improvement.

Hi mkarcher! That’s an plausible explanation, thanks.
According to the little information I found, it seems the computer has a TrakStar ISA card installed or something related.
https://www.diskman.com/presents/trackstar/scans.htm

Edit: I've checked the PDFs on that site..
The TrakStar Plus supports IBM 8503001 mono monitor and 8513001 colour monitor, according to this flyer:
https://www.diskman.com/presents/trackstar/do … lease_flyer.pdf

They seem to be PS/2 monitors.

Edit: Trackstar 128 supports both 640x200 (CGA) and 720x350 monitors (MDA TTL), according to the PDF:
https://www.diskman.com/presents/trackstar/do … 128_leaflet.pdf

Same time, though, the IBM PS/2 Model 30 is shown and named.
("Run Apple software on IBM PC, XT, Personal System Model 30 or compatible")

That being said, I don’t know which TrakStar card is installed, if at all. 🤷‍♂️

There are also IBM PC/Apple II combo PCs without TrakStar technology,- I think -, with an hybrid mainboard instead.
For example, the Gigatronics KAT from Greek.

KAT is a rare hybrid computer (IBM PC-Apple II compatible) from a Greek company (that no longer exists) called Gigatronics. Giga […]
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KAT is a rare hybrid computer (IBM PC-Apple II compatible) from a Greek company (that no longer exists) called Gigatronics.
Gigatronics designed and produced in Greece the mainboard,the case, and the power supply of the computer.
It has a 8088 4.77Mhz processor and a 65c816.
The apple and the IBM hardware plus the cga,serial,parallel and game card are all on the mainboard leaving 3 ISA slots for future expansion.

Source: https://www.youtube.com/watch?v=Zhu9vxEm8Gc