On 2019-04-06 22:28, Timothy Stark wrote:
I was surprised to see that! Very good news!! Good job! I will try that soon.
For 8250/8350, you need two MP processors. Does vax820 emulate two MP
processors like VAX-11/782?
The 8250 multiprocessor uses VAXBI for interconnection, and it's a
symmetric multiprocessor system.
The VAX-11/782 was a very different beast with shared memory, and
asymmetric multiprocessing.
But as far as I know, simh supports neither, as it don't really manage
multiple processors that easily in general. Too much global data, if I
remember right.
Johnny
Tim
-----Original Message-----
From: Simh <simh-boun...@trailing-edge.com> On Behalf Of Matt Burke
Sent: Saturday, April 6, 2019 1:21 PM
To: Simh Trailing-Edge Mailing List <simh@trailing-edge.com>
Subject: [Simh] VAX 8200/8250
Here is a new simulator for the VAX 8200/8250 systems. Most of the key features
are there including the DWBUA BI-Unibus adapter which allows all the existing
Unibus devices to be used. The console RX50 is also implemented.
The console processor is not simulated so it uses the same VMB trick as the VAX-11/7xx simulators
i.e. you boot directly from a device "boot rq0" rather than "boot cpu".
You can get the code from:
https://github.com/9track/simh/tree/vax820
And Windows executable from:
http://www.9track.net/simh/vax820
Please try it out and let me know how you get on.
Matt
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|| on a psychedelic trip
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