IBM 360/30 in verilog

[Dave Wade]

> -----Original Message-----
> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Camiel
> Vanderhoeven
> Sent: 12 July 2016 09:56
> To: General Discussion: On-Topic and Off-Topic Posts
> <cctalk at classiccmp.org>
> Subject: RE: IBM 360/30 in verilog
> 
> Op 12 jul. 2016 10:14 a.m. schreef "Dave Wade" <dave.g4ugm at gmail.com>:
> >
> > > -----Original Message-----
> > > From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of
> > > Curious Marc
> > > Sent: 12 July 2016 08:58
> > > To: General Discussion: On-Topic and Off-Topic Posts
> > > <cctalk at classiccmp.org>
> > > Subject: Re: IBM 360/30 in verilog
> > >
> > > Darn. My hopes are shattered. Lots of Verilog in my future, that is
> > > if
> we
> > can
> > > find 360/50 ALDs...
> > > Marc
> > >
> >
> > It actually might be easier to produce a generic S/360 clone in FPGA
> > using the POP rather than individual ALU's.
> > Having built a very simple CPU (in VHDL not Verilog) and planning to
> > start on a more complex (Ferranti Pegasus) Of course it wouldn't be
> > cycle accurate, but perhaps that wouldn't be important.
> 
> Sure, a generic one would be simpler, but the point of doing an accurate one
> of a specific model (65 in my case) is to accurately drive the panel that shows
> the  internal registers and opening of gates.

I think you are correct. I had assumed that the panel only displayed the normal 360 registers, in which case 
the VHDL could easily route these to a panel, but on reading the 360/65 Functional Characteristics 

http://bitsavers.informatik.uni-stuttgart.de/pdf/ibm/360/funcChar/A22-6884-3_360-65_funcChar.pdf

I can see several registers are displayed that are not mentioned or defined elsewhere so you would need a
Set of ALDs for the 65 (or possibly a 67 as that’s basically the same machine) to get a full panel display. It would
Also be nice to see what is on the roller selector switchs as that page in the manual has not scanned very well..

Dave