Results: VXT X terminal question

From: Michael Sokolov <msokolov_at_ivan.Harhan.ORG>
Date: Sat Jan 18 18:14:00 2003

Fred N. van Kempen <Fred.van.Kempen_at_microwalt.nl> wrote:

> When booting the M76 with the VXT (V2.1) load image, nothing happens
> after the load image has been loaded. In other words, it dies when
> started.
>
> [...]
>
> So.. heh. Now, to find out what is happening with the M76...

Well, it's obvious what's happening. The VXT program reads the SID register,
sees the top byte equal to 0B, and doesn't know what the heck to do with it. In
other words, it just doesn't support this machine.

> When loading the M38... _it_works_ !
> The VXT software "detects" a VT1300 with SPX and 16MB, and happily runs.

Good. This is what I expected, but just to make sure. The real VT1300 was AFAIK
a KA42-A (M30, 90 ns cycle time) with GPX video, so you've just built a better
VT1300 with a faster 60 ns cycle time CPU and with SPX video. Given that the
VXT program runs on 3 different CPUs (VS2000 with MV II, KA42/VT1300 with CVAX,
and VXT2000 with SOC), we can safely assume that your faster VT1300 won't cause
any problems later, i.e., the program is very unlikely to time things with CPU
cycles.

MS
Received on Sat Jan 18 2003 - 18:14:00 GMT