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Telebyte 65A RS232 Converter

MITS Altair 680 cover removed
I modified my Altair 680 for 110b, no Baudout, 1 stop bit (see notes about stop bits below). I te... read more

by billdeg - 03/25/2015 23:39 - Total messages in this thread: 4 Last Post: YouTube.com Video papertape BASIC 03/31/2015
 
TRS 80 Model III Hi-res Graphics Board

TRS 80 Model III 26-1125 hi-res board demo image
TRS 80 Model III 26-1125 hi-res board demo image. Click on image for larger view... read more

by billdeg - 09/05/2014 10:43 - Total messages in this thread: 2 Last Post: Space Invaders 03/30/2015
 
PDP 11/40 M7656 Serial Comms

Animated gif of PDP 11/40 running chase the lights program. While the program was running I was doing heat tests on the power supply control board to see if any resistors were running too hot.

Now that the core system ... read more

by billdeg - 03/16/2015 23:33 - Total messages in this thread: 2 Last Post: M7856 Setup 03/18/2015
 
PDP 11/40 Power Supply Issue!

Nooo! The console and power supply light flicked out while in use. WTD: Power Supply or Power Supply Module. The part number on the front is "H742a" and it's the big part of the power supply in the back. In front (looking from the side) are power modules. The modules and the console po... read more

by billdeg - 08/12/2008 22:02 - Total messages in this thread: 10 Last Post: Restore Complete 03/16/2015
 
Altair 8800B Restoration

The subject of this thread is to document the restoration of a previously-working Altair 8800B, which I accidentally shorted by inserting a RAM card with the power on (oops). After probing voltages and looking for A/C ripple, the general consensus of the MARCH workshop team was to open up the front... read more

by billdeg - 05/19/2013 19:59 - Total messages in this thread: 7 Last Post: VR2 cap replacement no improvement 03/08/2015
 
Raspberry Pi as Gateway to Internet

Raspberry Pi as Internet Gateway for Vintage Computers
The Raspberry Pi can be used to connect vintage computers to the intern... read more

by billdeg - 01/03/2015 13:48 - Total messages in this thread: 2 Last Post: Demonstration Video 02/28/2015
 
Live long and prosper, Spock

Live long and prosper, Spock... read more

by billdeg - 02/27/2015 14:20 - Total messages in this thread: 1
 
Intellec MON 80 Monitor HEX Dump

Intel 1702A with MON 80 ROMs
Intel Intellec/8 MON 80 on 8 1702A ePROMs starting from address 3800H. Each 1702A has a sticker that reads MON 80 38... read more

by billdeg - 01/26/2015 13:04 - Total messages in this thread: 5 Last Post: Intel imm 6-26 PROM Memory Module 02/25/2015
 
1966 Honeywell u-COMP DDP-516

Pictured is the cover from Honeywell's sales brochure of the u-COMP DDP-516 "...third generation general purpose digital computer...". The DDP-615 was a 16-bit word minicomputer expandable to 32K Core RAM mem... read more

by billdeg - 02/16/2015 18:46 - Total messages in this thread: 1
 
SIMH Emulator - 1956 LGP-30 Computer

The 1956 Royal Precision Electronic Computer model LGP-30
The 1956 Royal Precision Electronic Computer model LGP-30
Making heads or tails of the LGP-30 SIMH simulator written for the Royal Precision Electro... read more

by billdeg - 02/09/2015 20:49 - Total messages in this thread: 3 Last Post: How Instructions are Processed 02/16/2015
 
Digital PDP-9 The Serious Computer

Digital PDP-9 Computer PDP/9
Cover of the November 1967 Digital PDP-9 Sales Brochure. Sigh. Click image for larger view.
... read more

by billdeg - 01/25/2015 11:46 - Total messages in this thread: 1
 
Digital PDP11 late 1969 early 1970

The Cover of the Jan/Feb 1970 Digital PDP11 sales brochure.
There is a popular misconception that the PDP11/20 was the first PDP 11 and that the 11/10 was introduced later, with the 11/05 and 11/40. In... read more

by billdeg - 01/25/2015 11:33 - Total messages in this thread: 1
 
Teletype Model 15

Caption contest Avert your eyes before it's too late! "Ms. Amateur Radio 73 November 1976"
Click thumbnail to download larger ... read more

by billdeg - 12/09/2008 16:08 - Total messages in this thread: 3 Last Post: Threads with Comments about Photo 01/11/2015
 
Remodeling Project

Vintage Computer Desks
Can you name all of the items in this photo? Click image for larger view.
I have been working to remodel ... read more

by billdeg - 01/04/2015 19:00 - Total messages in this thread: 1
 
Computer History and Restoration Links

The thread date will be updated to indicate the last update. Suggest a site here. Mid-Atlantic Retro Computing Hobbyists http://www.midatlanticretro.org Every Computer That Ever Was (list) http://www.crowl.org/lawrence/history/computer_list Bryan's Old Compute... read more

by billdeg - 12/26/2014 13:05 - Total messages in this thread: 1
 
 
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