RE: XH558 - was Re: using new technology etc

-an-expensive-revamp-to-its-flagship-a380/ Dave G4UGM

RE: using new technology on old machines

That's only the schematic. The link I included earlier:- http://dustyoldcomputers.com/pdp-common/reference/drawings/modules/m/m452.pd f also includes the PCB component layout, from which I inferred the Trim Pot is of the 10-turn variety. Dave -Original Message- From: cctalk

RE: using new technology on old machines

-Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Noel Chiappa Sent: 17 June 2015 15:08 To: cctalk@classiccmp.org Cc: j...@mercury.lcs.mit.edu Subject: Re: using new technology on old machines From: Dave G4UGM I found it easier

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

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

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

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

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

A friend of mine refused to buy modern SD Cards because there was no way he was going to fill them. Trouble is that although smaller SD cards were available they were way more expensive (being discontinued and therefore rare and valuable).. He struggled with buying a larger card only to waste most

RE: 80 column (un)punched cards

-Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis Sent: 10 June 2015 06:07 To: gene...@classiccmp.org; discuss...@classiccmp.org:On-Topic and Off- Topic Posts Subject: Re: 80 column (un)punched cards On 06/09/2015 08:52 PM, Mike Stein

RE: Front Panel Update

-Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of tony duell Sent: 10 June 2015 05:46 To: General Discussion: On-Topic and Off-Topic Posts Subject: RE: Front Panel Update Interesting. Varian is a microwave equipment company; I have one of their

RE: Pertec Tape Drive Interface Musings

Mark, Traditional 9-track tapes are always written block-by block with a short gap between the records, WikiPedia say 0.6 for 1600BPI which sounds about right. From what I remember as tapes are not the most reliable medium the process was to have the read head after the write head so the tape

RE: Pertec Tape Drive Interface Musings

-Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Mark J. Blair Sent: 10 June 2015 17:13 To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Pertec Tape Drive Interface Musings On Jun 10, 2015, at 08:46, Al Kossow

RE: Front Panel Update

Is this appropriate for an SBC6120 or does that need different switch labels ... -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Rod Smallwood Sent: 08 June 2015 13:20 To: gene...@classiccmp.org; discuss...@classiccmp.org:On-Topic and Off- Topic

RE: PDP8/e front panels.

Rob, How much in the UK Dave -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Adrian Stoness Sent: 06 June 2015 14:39 To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: PDP8/e front panels. pic? On Sat, Jun 6, 2015 at 5:13 AM,

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