PDP-8.co.uk » PDP-8/A http://pdp8.co.uk A guide to the preservation and restoration of PDP-8 computers Mon, 07 Jun 2010 08:39:29 +0000 http://wordpress.org/?v=2.9.1 en hourly 1 PDP-8’s for sale http://pdp8.co.uk/2010/06/07/pdp-8s-for-sale/ http://pdp8.co.uk/2010/06/07/pdp-8s-for-sale/#comments Mon, 07 Jun 2010 08:39:08 +0000 Toby Russell http://pdp8.co.uk/?p=247 I’ve decided to sell of a few PDP-8’s as the hoard is getting rather large at the moment and so I’m prepared to part with the following:

  • PDP-8/M, 8KW core, M8655 serial UART, very clean machine in working order
  • PDP-8/E, 4KW core, M8650 UART, requires a full rebuild
  • PDP-8/A, 16KW core, extended memory, serial, paper tape drive and controller (non DEC). Very clean and in working order
  • RX8E + RX01 drives
  • PC8E + PC04 paper tape
  • DECmate III
  • WP78 (aka a VT78)

Email offers to toby@pdp11.co.uk . Machines are located in UK

]]> http://pdp8.co.uk/2010/06/07/pdp-8s-for-sale/feed/ 0 PDP-8/A Documentation http://pdp8.co.uk/2010/05/23/pdp-8a-documentation/ http://pdp8.co.uk/2010/05/23/pdp-8a-documentation/#comments Sun, 23 May 2010 18:30:53 +0000 Toby Russell http://pdp8.co.uk/?p=234 [ ] EK-8A002-MM-02_PDP8A_UsersMan.pdf 21-Apr-2003 02:21 37M [ ] EK-FPP8A-MM-001_FPP8-A_Maint_Sep76.pdf 24-Aug-2007 02:02 7.8M [ ] EK-FPP8A-OP-001_FPP8-A_UsersMan_Dec76.pdf 22-Jan-2007 00:45 1.0M [ ] EK-KL80A-OP-001_KL8-A_jan78.pdf 19-Dec-2003 06:19 3.6M [ ] EK-KT08A-UG_jul78.pdf 19-Aug-2001 21:44 1.8M [ ] EK-MS8CD-TM-001_MS8-C_MOS_Memory_Technical_Manual_Sep80.pdf 24-Aug-2007 17:56 2.0M [ ] FPP8-A_EngrDrws_Feb76.pdf 06-Oct-2006 17:56 2.8M [ ] KC8-A_engrDrws_Dec74.pdf 12-Mar-2003 19:42 1.2M [ ] KC8-A_schem.pdf 29-Oct-2003 20:39 1.2M [ ] MP-00KL8-A0_KL8-A_Engineering_Drawings_Dec75.pdf 14-Jun-2009 19:03 2.7M [ ] MP00057_FPP8-A_Mar76.pdf 22-Jan-2007 00:37 6.3M [ ] MP00415_8Asemi_Schem_Apr81.pdf 21-Jun-2005 20:26 21M [ ] PDP8A_Schems_Apr81.pdf 28-Mar-2002 17:19 21M [DIR] firmware/ 20-Dec-2009 17:59 - ]]> http://pdp8.co.uk/2010/05/23/pdp-8a-documentation/feed/ 0 Overview of my PDP-8/A (1 of 2) http://pdp8.co.uk/2008/11/23/overview-of-my-pdp-8a-1-of-2/ http://pdp8.co.uk/2008/11/23/overview-of-my-pdp-8a-1-of-2/#comments Sun, 23 Nov 2008 08:53:42 +0000 Toby Russell http://www.pdp8.co.uk/?p=33 I have two identically spec-ed PDP-8/As which I purchased a couple of years ago across ebay. The machines were originally from a CNC machine and feature 16KW of memory together with paper tape readers.

The cards fitted are as follows:

  • M8315 – KK8A PDP-8/A CPU board (hex wide)
  • M8317 – KM8AA PDP-8/A bootstrap, powerfail (hex wide)
  • M8316 – DKC8AA PDP-8/A I/O serial/parallel/clock (hex wide)
  • G650 – MM8AB PDP8A 16K Memory stack (hex wide)
  • H219B – MM8AB PDP8A 16K Memory control (hex wide)
  • G650 – MM8AB PDP8A 16K Memory stack (hex wide)
  • H219B – MM8AB PDP8A 16K Memory control (hex wide)
  • Third party paper tape drive controller

My intention my second 8/A in this configuration, however for the first I am going to upgrade it to create a fairly highly spec-ed machine. I have the following additional cards:

  • M8319 KL8A PDP-8/A 4 channel serial I/O
  • M8357 RX8E RX01/RX02 interface
  • M8416 KT8AA PDP8A Memory Management (hex wide)
  • M8417 MSC8DJ PDP8A 128K MOS Memory (hex wide)
  • M8433 RL8A Disk controller for RL01/02 (hex wide)

I will be removing the current core memory and paper tape controller as part of this upgrade. In theory I believe the memory might be reusable in my PDP-8/M (at least the PDP-8 FAQ suggest it can), although I a moderately sceptical due to the cards being hex slot and an Ms backplane only being quad slot.

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