7 Jun
2023
7 Jun
'23
2:52 p.m.
On Jun 7, 2023, at 11:26 AM, Jonathan Katz via cctalk
<cctalk(a)classiccmp.org> wrote:
Hello!
I have an IBM 6152 aka IBM RT system I rescued. (It may be a 6151?)
You have a 6151, the 6152 has VGA graphics (is built inside a PS/2 Model 60)
I'm 90% sure it has colour graphics. The system
does seem to POST
correctly (according to the LED on the front) but the CRT is dead. I'm
wondering if anyone has built an adapter to hook this to a VGA
monitor.
You’re going to run into trouble, then, as the video signal is completely incompatible
with a normal VGA multisync monitor. It’s TTL color, interlaced, with a horizontal scan
frequency less than 31kHz. 720x512 interlaced.
The RT knows how to use a “standard” IBM PC MDA or EGA adapter. Might be better off using
one of those instead, at least for now.
ok
bear.