Search Posts:

Latest Projects:

Commodore CBM PET 2001-32B Keyboard

by billdeg
Total messages in this thread: 3
Updated: [ External Cassette Short ] 02/02/2018
The Commodore CBM (PET) 2001-32B, after restoration. Click image for larger view.
After years sitting on top of a dryer in the laundry room, the entire motherboard became covered by lint dust. This photo shows some dust removed, revealing a pretty serviceable circuit board with little rust. Click image for larger view.
Keyboard Repair The system boots but other than the "u" key and the "Enter" key the keyboard does not respond to keystrokes. I took apart the keyboard. The circuit board tests OK and the key">... [ read more ]


by billdeg
Total messages in this thread: 2
Updated: [ ADA 1450 Printer Interface ] 02/02/2018
Cassette of the CmC Edit/Assembler program, 11/18/79 version. The editor / assembler is a Commodore BASIC program interface that calls PEEK and POKE commands through BASIC to edit and generate 6502 assembly language programs. Click image for larger view.
This photo shows a Commodore PET 2001-8 loading the CmC editor/assembler from cassette. Click image for larger view.
The CmC editor/">... [ read more ]

Sun Ultra 1 Creator Needs Battery

by billdeg
Total messages in this thread: 2
Updated: [ Video ] 01/17/2018
sun ultra 1 boot error
With a serial terminal attached, the Sun Ultra 1 workstation displays the point of failure upon boot. False color image taken without flash. Click image for larger view.
The keyboard lights when power is applied and it appears that the system attempts to read a CD if present in the CD ROM drive. That's kind of good news. Consistent with a bad NVRAM chip there is nothing coming through the hi-res display. I have 2 unformatted harddrives installed and a Solaris 9 CD (system came with it in the CD drive). I think the system is freezing when it gets to the point of attempting to access the CD drive, but that's just a hunch. Does not matter if there is something in the CD drive or not. The harddrives I have">... [ read more ]

AT&T PC 7300

by billdeg
Total messages in this thread: 5
Updated: [ Video, Disassembly for repairs ] 01/17/2018
This AT&T PC 7300 was donated for study. The AT&T PC 7300 UNIX Computer from 1985. Serial Number 370429020 000139
So far I have tested the power and the memory, all OK. System originally booted up, but I did not have any login info so I decided to format the drive and re-install the OS from disks. There is a minimal OS 3.5.1 loaded for the moment. Doing research to determine next best action. Pictures">... [ read more ]

Sun Sparcstation 10

by billdeg
Total messages in this thread: 1
Sun Sparcstation 10
Cover removed to show the motherboard and attached componets of the Sun Sparcstation 10. Note ROSS processor upgrade and TurboXGX display card. Click image for larger view.
Sun Sparcstation 10
This SCSI to SD adapter serves as hard drive. A lot faster and more reliable. Click image for larger view.
Installed an SD to SCSI drive and Jon Chapman (glitchworks) installed onto that Sun OS Release 4.1.4 from the internal CD drive (I think or external drive). Either way , it works. the only issue is that from the serial c">... [ read more ]

NeXTstation Turbo

by billdeg
Total messages in this thread: 1
NeXT NeXTStation Turbo
The NeXTstation Turbo computer. The effort required to get this machine running was minimal. I was able to complete a usable network configuration within a few minutes. As with most NeXT systems it came installed with the NeXTStep version of Berkeley UNIX BSD, the grandfather of the MAC OS X. Click image for larger view.
NeXT NeXTStation Turbo
Here is a view of the motherboard, drives, and power supply. Click image for larger view.
">... [ read more ]

Object Photography

by billdeg
Total messages in this thread: 1
An Atomic Instrument Company Model 111 computer tube module from the late 1950's early 60's. Click image for larger view.
Program drum for an IBM 29 card punch (and similar models) punch card machine. Click image for larger view.
SLT Logic module from an IBM 360 or 1800. Click image for larger view.
[ read more ]

CBM SuperPET Tips (CBM S9000)

by billdeg
Total messages in this thread: 4
Updated: [ SuperPET WCS Disk Backup ] 12/21/2017
The manuals supplied by Commodore are frustratingly incomplete and require a lot of head banging and experimenting to accomplish what should be simple tasks. The top of the klugey list is printing a program listing. Here are some useful tips and tricks including a few things that are not found in the original manuals. I still recommend that you try to find and read a copy of the SuperPET manuals (pamplets) too. 1. In order to use the SuperPET in 6809 mode, you must have the OS boot disk titled "SuperPet WCS" present in drive 1 (left drive) of an 8050 (or 8250) dual-diskette drive. Set the side dip switches to 6809 and R/W. If you do not have this disk or a 8050/8250 drive, you'll have to trouble doing much more than staring at the initial boot menu. This menu lists the programming language options (Pascal, COBOL, FORTRAN, BASIC, etc.) BUT these components are not included in">... [ read more ]

NExT Cube Restoration

by billdeg
Total messages in this thread: 1
NeXT N1000 Cube
The NeXT N1000 or "NeXT Cube" computer. Click image for larger view.
NeXT N1000 Cube
Here is a view of the NeXT Cube from the front with the chassis, optical drive and inner drive cover removed. The backplane is visible on the bottom with the motherboard (on it's side) and power supply (not visible) plugged into it. The system's internal full-height 5 1/4" hard drive sits unsecured upon the power supply, plugged into the motherboard from the back. The hard drive is an SCSI Seagate ST41200N. Click image for larger view.
... [ read more ]

NextStation Color

by billdeg
Total messages in this thread: 6
Updated: [ Replacing the Internal Battery ] 12/04/2017
NextStation Color System
The NextStation Color. Photo shows system while loading NextStep. Click image for larger view.
NextStation Color City
Pictured Next's Sound Box, an I/O port station. A separate box is necessary because the color workstation display does not have internal speakers like the monochrome display. The NS Color I/O cable attaches to the back of the computer on one end and on the other end the cable is s">... [ read more ]

Prevent VMS MULTINET SMTP Relay Hijacks

by billdeg
Total messages in this thread: 2
Updated: [ Apply SMTP security to Vax 4000-200 ] 12/02/2017
A VAX with VMS 5 that uses the MULTINET TCP/IP stack is vulnerable to third-party SMTP relay hijacks by any Tom-BOT-and-Harry probing around for a port 25 SMTP server. Case in point, my MicroVAX 3100 exposed to the outside Internet would clog up with queued relay messages in a matter of hours putting me at risk of being flagged by my ISP (Comcast). As a result I could not keep the machine online for an extended period. I decided to see if I could solve the problem at the VMS or MULTINET stack level. Yes it would be easier to simply install a modern router or firewall solution but what fun would that be? Here is an example message from the queue: $ show queue /full 10 SMTP-RETURN SYSTEM 19 Holding until 2-DEC-2017 12:49 Submitted 2-DEC-2017 12:18 /FORM=DEFAULT /PARAM=("; Error sending MAIL command to">... [ read more ]

IBM DOS 3.30 on a Commodore BX700 CBM-II

by billdeg
Total messages in this thread: 1
This stack of IEEE drives was used during testing of Michal Pleban's port of IBM DOS 3.30 to the CBM-II. Michal has a GITHUB page that explains how it works in detail but in short he created a PC compatibility layer that functions between the 8088 co-processor card on the CBM-II and the 6509 CPU on the main board. Click image for larger view.
I used a Zoom Floppy with an IEEE adapter added to build the disks using CBM Transfer. This was tricky, the s">... [ read more ]

Apple //GS (II GS) Battery

by billdeg
Total messages in this thread: 1
Apple II // GS Battery
Pictured is the original 1/2 AA Lithum battery dated 1/8/1987. The voltage measured from the terminals was nearly 0. Although the battery was not leaking yet, eventually it will leak and if left unchecked ruin the motherboard. So I snipped it off, leaving the posts still attached and folded out of the way. Click image to view larger version of image.
Apple II // GS Battery
Snip, battery removed. If I used this computer a lot I might put in a new battery, but it's not necessary">... [ read more ]

Build a bootable RSX11/M on RL02 disk

by billdeg
Total messages in this thread: 2
Updated: [ Adding PDP 11 Programming ] 11/14/2017
Scan of my cover of the Digital pdp11 RSX-11M Beginner's Guide manual.
RSX-11M Manuals http://wwcm.syn...0Manuals.html This thread describes how one might use simH on a $9.95 Next Thing Co CHIP to make an RL02 image of RSX11/M V 4.0 BL 32 (BASELINE). I got the how-to via web search and clues from CCTECH and simH user group members interested in the project. My case - For my PDP 11/40 I have no working EIS option card. (Otherwise I'd be using UNIX 6.) I already have RT11 running but I wanted to try RSX11. I was told that RSX11/M v.4.0 BL 3.2 is the newest OS version compatible with my system. Distribution media disk images for RSX11/M can be found in RL01 format but not RL02, so I had to first build one RL01 boot disk using 4 RL01s and then port to RL02. ... [ read more ]

Donner 3500 - an early portable computer

by billdeg
Total messages in this thread: 9
Updated: [ Retro Thing Article ] 11/11/2017
The 1959 Donner 3500 portable analog computer. Click for larger image.
Pushing the exploration of portable computing one giant step farther (for me), here is a quick glimpse of the Donner 3500...My copy of the instruction manual was published in 1960, after Systron merged with Donner to form Systron-Donner Corporation. The manual depicts a Model 3500 with leather handles on the sides. The computer I have has metal handles on top, and I am unsure if this means it's an earlier model made before the merger or if the handles were added by the owner. Because they are symmetrical, I'd like to believe that they are factory/original handles. Also, this computer's serial number is 107, which also indicates an earlier version. Serial numbers can be deceiving however.">... [ read more ]
OLDER POSTS (15 threads per page): 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 |


Buy a Commodore Computer Poster

Popular Topics and FAQs

  • Commodore B Series Tips and Tricks
  • Aerocomp TRS 80 M 1 Expansion Unit DDC
  • Items Wanted
  • Lobo Max 80
  • Zenith Z-19-CN
  • Prototype PET 2001 photo
  • Using Toggle Switches to Analyze Memory
  • Commodore Disk Archive Project
  • PET 2001 Prototype at Gametronics 1977
  • Jim Butterfield Photo
  • IMSAI 8080 With Processor Tech. Cutter
  • Secrecy is the keystone of all tyranny
  • Cromemco System Three
  • Northstar Horizon - Boot Problem
  • Computer History and Restoration Links
  • Commodore BX-256-80 - 8088 Co-processor
  • S-100 board testing with Z-80 ICE
  • Donner 3500 - an early portable computer
  • Digital (DEC) PDP 11/05 NC Assembly
  • Univac 1219 rescue
  • Fido BBS listing node list 6-13-1986
  • PDP 8e
  • MITS 88-2 SIO (2SIO) for BASIC
  • Visual Technology Inc Model 1050
  • Amiga 2500 Restoration
  • The Evolution Of IBM Computers
  • Replacement teletype print hammer head
  • Archiving and Copying Software 101
  • Computers Built 1940 - 1950
  • CBM B-520 (a.k.a B256-80 or B500 256)
  • RCA COSMAC Microkit
  • Commodore 64K C-116 Mods
  • MITS 8800b Turnmon 9600 baud
  • Catweasel, 8in and 5 1/4
  • Raspberry Pi as Gateway to Internet
  • Digital PDP11 late 1969 early 1970
  • PDP 11/40 72 inch cabinet model
  • PDP 11/40 Industrial 11 model
  • Digitial MicroVAX 3100 30 System
  • Digital VAX 4000-200
  • Commodore 64 / 1541 DRIVEKNOCK
  • Booting the System Using RL02 drive
  • PACS: Reflections by Kathleen Mauchly
  • Tele-Graphic Computer Systems Inc.
  • Commodore B Series SID Jukebox?
  • Installing Core into PDP 11/40
  • Setting Up OpenVMS 7.1 DNS CLERK
  • Felt-Tarrant Comptometer Model J
  • NextStation Color
  • Digital Rainbow (PC100-B2)
  • 1970 Compusad Compulogical Tutor
  • Archiving Papertapes Using DSI NC 2400
  • 1976 P.C.C. Features the MAI JOLT 6502
  • 1961 Beckman DEXTIR Computer
  • UNIVAC 1 and UNIVAC File Computer 1
  • Past Issues:

    Burroughs J 700 adding machine

    This image was selected at random from the archive. Click image for more photos and files from this set.