photos from VCF UK

[Lawrence Wilkinson]

On Mon, 2010-06-21 at 14:25 -0400, Dave McGuire wrote:
> On 6/21/10 7:03 AM, Roger Pugh wrote:
> > I quite fancy an IBM 360 / 30 FPGA board now i know a little about big
> > iron!
> 
>   Urr?  Is someone working on that?

Ah, yes.  VCF was its debut.  I haven't got a page up yet, but you can
see Andrew's photo at:
http://www.flickr.com/photos/carrierdetect/4718559358/

Basically, it's a 1000K gate Spartan 3 which contains the microcode
store (2k x 55) and 8k x 9 of main memory.  Front panel switches are
physical rotaries and pushbuttons; blinkenlights are via a VGA display
for now.

Right now it fails the microcode startup diagnostics with a main memory
parity error, probably due to a race condition somewhere (the
memory /used/ to work).

Once that's sorted, the next step is to get it executing 360 code.  Then
adding virtual peripherals to the multiplexor and selector channels.
Then taking a 2311 DOS/360 image, and booting.  Simple!

Once I get the diagnostic stuff sorted I'll put an image or the VHDL up
for anyone that wants to have a go at programming it into one of the
Digilent S3 boards, or perhaps porting it to something similar.


-- 
Lawrence Wilkinson                                 lawrence at ljw.me.uk
The IBM 360/30 page                       http://www.ljw.me.uk/ibm360