Re: Python programming

From	Grant Edwards <invalid@invalid.invalid>
Newsgroups	comp.lang.python
Subject	Re: Python programming
Date	2014-02-13 02:57 +0000
Organization	PANIX Public Access Internet and UNIX, NYC
Message-ID	<ldhcau$d9v$1@reader1.panix.com> (permalink)
References	<b2db52b0-d7f7-43dd-9ddf-86feb109ebc8@googlegroups.com> <roy-18C608.22022011022014@news.panix.com> <201402112314.42370.gheskett@wdtv.com> <ldftlc$ohg$1@ger.gmane.org> <mailman.6815.1392256827.18130.python-list@python.org>

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On 2014-02-13, Dennis Lee Bieber <wlfraed@ix.netcom.com> wrote:

> 	An S-100 wire-wrap board.

Yup, been there done that!

I had a second-hand, off-the-shelf S-100 Z80 CPU board, a second-hand
S-100 memory board with 4KB of DRAM (eight 4Kx1 chips) and 2KB of ROM
(eight 256x8 Intel 1702A EPROMS), a home made backplace PCB with 5 or
6 slots, a home-made S-100 wire-wrapped board with two UARTs and some
other miscellaneous stuff. I shoved it all into rack-mount Motorola
Exorciser chassis I pulled out of a dumpster.

> I hand assembled a monitor program with, as I recall, 0..F, High,
> Low, Store, Go functions for the keyboard/display.

I was living large: I had access to an Intel MDS-800 "blue box" system
in one of the University's labs.  It ran CPM with dual 8" floppies and
an EPROM programmer. [I think it also may have run some proprietary
Intel OS, but I was a CP/M man.] I typed in an assembly language
monitor program out of some book or other, assembled it on the
MDS-800, burned the ROMs, hooked up a borrowed Lear-Siegler ADM3A
terminal to my wire-wrapped serial board, and it actually worked for a
little while before something failed.  Building reliable wire-wrap
stuff is a real art -- unfortunately one I never learned.  It also
could have been the backplane that failed: the S-100 bus connecters
never _quite_ lined up preciesly with the card cage's guides, so there
were probably mechanical stress issues.

-- 
Grant

Thread

Python programming ngangsia akumbo <ngangsia@gmail.com> - 2014-02-11 16:21 -0800
  Re: Python programming Chris Angelico <rosuav@gmail.com> - 2014-02-12 12:17 +1100
  Re: Python programming Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-02-11 21:06 -0500
  Re: Python programming Rustom Mody <rustompmody@gmail.com> - 2014-02-11 18:46 -0800
  Re: Python programming Roy Smith <roy@panix.com> - 2014-02-11 22:02 -0500
    Re: Python programming Gene Heskett <gheskett@wdtv.com> - 2014-02-11 23:14 -0500
    Re: Python programming Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-02-12 13:41 +0000
    Re: Python programming Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-02-12 21:00 -0500
      Re: Python programming Grant Edwards <invalid@invalid.invalid> - 2014-02-13 02:57 +0000
        Re: Python programming Roy Smith <roy@panix.com> - 2014-02-12 22:04 -0500
          Re: Python programming Chris Angelico <rosuav@gmail.com> - 2014-02-13 14:13 +1100
            Re: Python programming Grant Edwards <invalid@invalid.invalid> - 2014-02-13 15:13 +0000
          Re: Python programming William Ray Wing <wrw@mac.com> - 2014-02-12 22:56 -0500
            Re: Python programming Dan Sommers <dan@tombstonezero.net> - 2014-02-13 05:18 +0000
          Re: Python programming Larry Martell <larry.martell@gmail.com> - 2014-02-13 03:30 -0500
  Re: Python programming Asdrúbal Iván Suárez <asdrubalivan.listas@gmail.com> - 2014-02-11 20:01 -0430
  Re: Python programming Ben Finney <ben+python@benfinney.id.au> - 2014-02-12 15:09 +1100
  Re: Python programming Larry Martell <larry.martell@gmail.com> - 2014-02-12 08:55 -0500
    Re: Python programming Roy Smith <roy@panix.com> - 2014-02-12 09:13 -0500
      Re: Python programming Larry Martell <larry.martell@gmail.com> - 2014-02-12 11:43 -0500
      Re: Python programming Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-02-12 21:13 -0500
  Re: Python programming Tim Delaney <timothy.c.delaney@gmail.com> - 2014-02-13 08:02 +1100
  Re: Python programming Chris Angelico <rosuav@gmail.com> - 2014-02-13 08:34 +1100
  Re: Python programming Tim Delaney <timothy.c.delaney@gmail.com> - 2014-02-13 09:57 +1100
  Re: Python programming Neil Cerutti <neilc@norwich.edu> - 2014-02-13 15:30 +0000
    Re: Python programming ngangsia akumbo <ngangsia@gmail.com> - 2014-02-14 12:29 -0800

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