FPGA tricks - Re: using new technology on old machines. Was: PDP-12 Restoration at the RICM

[Dave G4UGM]

> -----Original Message-----
> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of ben
> Sent: 15 June 2015 17:18
> To: cctalk at classiccmp.org
> Subject: Re: FPGA tricks - Re: using new technology on old machines. Was:
> PDP-12 Restoration at the RICM
> 
> On 6/15/2015 9:08 AM, Toby Thain wrote:
> > On 2015-06-15 9:35 AM, Dave G4UGM wrote:
> >> I don't think it is over kill. If you want over kill try this:-
> >>
> >> https://www.youtube.com/watch?v=ALXax3Gydl8
> >>
> >> and FPGA implementation of the Baby or SSEM which had 32x32 bits of
> > RAM. The implementation uses around 1% of the Spartan 3E 1200K gates,
> > and that includes the logic to generate the VGA which is around 50% of
> > the circuit. I expect to get it on a 100K gate chip but that’s still
> > over-kill.
> >>
> >
> > Speaking of VGA, you might like this:
> >
> > http://www.fpgarelated.com/showarticle/42.php
> >
> > --Toby
> >
> 
> But alas the software does *not* support the older chips.

How old is old? I managed to get a copy of ISE10.1 downloaded, installed and running without phoning, ringing or otherwise jumping through hoops. That supports the Spartan 2 which has been obsolete for some time..  If you want to play with some Spartan 2 chips contact me off-line.

> You want to make a mod 5 years down the road, sorry we do not support
> that model any more. TTL needs to  be stock piled now for the next +50
> years.
> I finally got 18 bit FPGA computer (DE1) design I like, that is early 70's speed.
> 1.5 us core. What I am having problems is finding a good book on Operating
> Systems from that Era that is online, any one know a good book? I have
> software that I need to write.
> Ben.
> 
> 
> 
>