Re: PDP-12 Restoration at the RICM (tony duell)

On Tue, Oct 13, 2015 at 08:32:49PM -0400, Michael Thompson wrote: > > What exactly do you mean by 'glitches'? Are these on a TTL level signal, > > an analogue > > output of the read amplifer, or what? > > > > You can see the logic analyzer trace of many of the TC12 signals here. >

RE: PDP-12 Restoration at the RICM (tony duell)

> > Date: Mon, 12 Oct 2015 18:29:11 + > From: tony duell > Subject: RE: PDP-12 Restoration at the RICM > > > We swapped the TU56 and TU55 drives between the PDP-12 and the PDP-8/I. > We > > Does the TU55 work correctly on the 8/I ? > Yes, it works perfectly. It even

Re: PDP-12 Restoration at the RICM (tony duell)

On 10/13/2015 07:32 PM, Michael Thompson wrote: Tracks 1 & 2 look fine. We swapped the probes for track 2 & 3 just to make sure that it wasn't a logic analyzer problem. A 'scope connected to the differential signals shows the same track 3 glitches. The glitches were present with the TU55 and

RE: PDP-12 Restoration at the RICM (tony duell)

Tony, thank you for your offer to supply replacement M452 Variable Clock modules for the console. We already have one jumpered for 110 baud for the Teletype. The other two M452 modules should be jumpered for 9600 baud and 38400 baud. The second serial port uses a M405 Crystal Clock module

RE: PDP-12 Restoration at the RICM (tony duell)

Date: Sun, 14 Jun 2015 15:25:08 + From: tony duell a...@p850ug1.demon.co.uk To: General Discussion: On-Topic Posts cct...@classiccmp.org Subject: RE: PDP-12 Restoration at the RICM Warren made an Arduino based programmable baud rate generator that works for both serial ports. After

RE: PDP-12 Restoration at the RICM (tony duell)

Tony, thank you for your offer to supply replacement M452 Variable Clock modules for the console. We already have one jumpered for 110 baud for the Teletype. The other two M452 modules should be jumpered for 9600 baud and 38400 baud. The second serial port uses a M405 Crystal Clock module