Subject: CT:Re: Test programs you can toggle in

From: [email-masked] (David Razler)
Date: Tue, 17 May 94 02:51:00 -0500

i >Message-ID: <[email-masked]>
i >Newsgroups: alt.sys.pdp8
i >Organization: Utah State University

i >In article <[email-masked]>, [email-masked] 
i >(Charles
i >Lasner) writes:
> Of course you're right on an -8/e-type panel, where it's also confusin
> to see the address of anything going through the same lights.  Sometim
> it's the updated address of the program counter telling you the next 
> location that will be fetched subsequently, and at other times it's th
> address of the operand data (or pointer if an indirect).  At least on 
> older panels the address displays are separate.

i >Could be worse. I imagine the PDP-5 spent about half its time displaying
i >address of the PC; you know, zeros. Haven't used one, though, so I'm jus
i >imagining; I'd appreciate it if any PDP-5 users out there can pipe up.

Never used one - the one I was supposed to get from Brooklyn Poly was gutted 
a week before I got there. Arithmetic Logic Unit went to the Computer 
Museum, the 1K core block is sitting next to me right now. The 3 micorsecond 
core was so slow that the machine had plenty of time to turn the lights on 
and off.
                                                  dmr

[[email-masked]]
---
 * WaveRdr 1.0 [NR] * UNREGISTERED EVALUATION COP