Subject: Re: Maths Co-processor.
To: Paul (Jimbo) Duncan GW7KES <>
From: Johnny Billquist <bqt@Update.UU.SE>
List: port-vax
Date: 01/09/2001 13:09:08
On Tue, 9 Jan 2001, Paul (Jimbo) Duncan GW7KES wrote:

> Hi, I was thinking about the messages about IEEE maths operations.
> Back when we used to use Sun 3/60's and the like there used to be
> add-an boards for the Sun's with either Sky or Weitek maths
> processors. Would it be feasable to make a QBUS card with a
> maths processor that main processor could call upon?

Sure. Suspect you could even make that board pretty simple. No DMA. Feed a
few registers with operators and opcode, and then get an interrupt once
the calculation is done. Result in another register.

Should be very simple. Put any CPU with IEEE math on the board, and write
a simple program that interfaces to the Q-bus, and performs the


Johnny Billquist                  || "I'm on a bus
                                  ||  on a psychedelic trip
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