Re: DEC 8235 IC? (repost)
To answer my own question, DEC 82xx type IC's are actually Signetics N82xx IC's. On 07-09-15 11:10, simon wrote: As something went wrong in posting this question, I try to repost it here. please don't be offended by this. - Hi all. is there a list of equivalents for DEC ic's? I've made a mistake in attaching our BA-8 to the PDP8/f and plugged in the ribbon cable connecting connector C and D the wrong way. some magic smoke came loose and there are a few chips broken . by comparing the signals on those connectors, I made a list of suspect chips on which some pins got-15v or +15v... The M8330 board got most of the blast, resulting in 4 burned chips, but other boards could well be affected. --- -- Met vriendelijke Groet, Simon Claessen drukknop.nl
Re: punchcard svg file available
Hi Lee. Thanks. feel free to rename the file to anything you like. :-) I decided to ignore rude yelling people. Being right and being polite are two completely different things. btw. in the Netherlands where I live, they are called ponskaarten and are nowhere to be find also. We only have one box of fresh cards and one box of used cards with our IBM 029. Of course the unused cards stay in the depot until we can do something usefull with them. That is why I made this file. As soon as I find a good local supply of the right type of paper, the cards can be reproduced. :-) Simon from hack42.nl On 10-09-15 17:22, Lee Courtney wrote: punchcard or PUNCH or PUNCHED card, still nice work. Thanks for sharing. Lee C. On Thu, Sep 10, 2015 at 4:38 AM, simon <sim...@dds.nl> wrote: Hi All, just to let you know that i've made a vector graphics file for A hollerith punchcard. https://hack42.nl/wiki/Bestand:Punchcard.svg enjoy -- Met vriendelijke Groet, Simon Claessen drukknop.nl -- Met vriendelijke Groet, Simon Claessen drukknop.nl
using new technology on old machines. Was: PDP-12 Restoration at the RICM
as long as it is done in a way that it can be restored to its original, i have no problems in using newer technology in older machines. we have a alix sbc build into our tek 4002a for demonstrational purpouses, all done without damaging or altering the original machine. On 14-06-15 17:25, tony duell wrote: The ripple on the power supplies is still going lower as we put more run time on the system. The power supplies are now within spec. Capacitors reforming naturally? Warren made an Arduino based programmable baud rate generator that works for both serial ports. After some debugging, it works nicely. I am sorry, but I find that obscene!. To use more components than the rest of the machine (probably) just for the baud rate clock is ridiculous. IMHO if you are going to modify a vintage machine, particularly one as rare as a PDP12, you should use the components that were available at the time. It's not as if a programmable buad rate generator is hard to make from TTL either. In fact given the Arduino thing needed 'some debugging' it might well have taken less time to do it in hardware. -tony -- Met vriendelijke Groet, Simon Claessen drukknop.nl
pdp8/e /f /m Omnibus legenda available
Hello all, As part of my effort to resurrect our lately broken pdp8/f, I've made a nice drawing of the connector lugs of an omnibus card with its signals next to it. Both sides are done together on one page. any comments are welcome link: https://hack42.nl/wiki/Bestand:Omnibus_legenda.pdf -- Met vriendelijke Groet, Simon Claessen drukknop.nl
