On 2015-06-15 12:57 PM, Dave G4UGM wrote:
-----Original Message-----
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of ben
Sent: 15 June 2015 17:18
To: cctalk@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.
Altera has the old version of Quartus for download on their site. I had
to take advantage of this to get a version that would compile for my
Cyclone I. :)
Anyone with older chips might want to grab the appropriate versions
while they are still there...
--Toby
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.
