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)

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 th

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 worked OK after we put it

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 > To: "General Discussion: On-Topic Posts" > Subject: RE: PDP-12 Restoration at the RICM > > > Warren made an Arduino based programmable baud rate generator that works > > for both serial ports. After some debugging, it works nicely. >

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