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The Computer Church

by billdeg
Total messages in this thread: 1
the computer church museum
Unpacking the large collection. Looks like we have a pair of vintage Heathkit Servo Recorders. Click image for larger view.
the computer church museum
Dr. Michael Pearson, Director of The Computer Church. Click image for larger view.
More Photos ...more to come. The Computer Church a computer museum that will become open to the public in Spring 2018. It's located in Parkesburg, PA. about 15 miles from my house.">... [ read more ]

MITS 8800b Turnmon 9600 baud

by billdeg
Total messages in this thread: 7
Updated: [ VG Monitor, TURNMON, Front Panel Altair ] 02/07/2018
Pertec MITS altair 8800b Turnkey model key view.
A view of the on/off key on the Pertec / MITS 8800b Turnkey model. The system required some minor repairs, a short was detected in the turnmon board preventing I/O from the Turnmon board. I repaired some burned out traces and set the baud rate to 9600.
Pertec / MITS Altair 8800b Turnkey model 9600 baud jumpers
View of a repaired turnkey "turnmon" board. Note S0, S1, and S2 are jumpered to produce 9600 baud. S0 required minor repair, some of the original trace metal was lost. The staining is only cosmetic. Click image for larger vie">... [ read more ]

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 ]

CONNECTICUT microCOMPUTER (CmC)

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 ]

Computer History and Restoration Links

by billdeg
Total messages in this thread: 1
The thread date indicated last update. Suggest a site here. Bitsavers Software and Document Archive http://bitsaver...ge.com TextFiles.com rTTY Art Repository http://artsc...LLECTION/ Mazjel.com Datastore: Manuals and system docs galore. http://maben.ho...S100/index.html Dave Dunfield's Site - vintage computer newbies should start here, disk archiving info here http://www.classic...dunfield Glitchworks FDC Results Registry - Drive controllers for imaging disks https://services....tfdc_results Bryan's Old Computers Document Archive http://bytecoll...om/m8_docs.htm Every Computer That Ever Was (list) http://www.crowl...computer_list Samuel S Snyder's 1964 "History of NSA General-Purpose Electronic Digital Computers" http://www.govern">... [ read more ]

SIMH Emulator - 1956 LGP-30 Computer

by billdeg
Total messages in this thread: 6
Updated: [ Clock Gen Card Image ] 01/18/2018
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 Electronic Computer model LGP-30 is a worthy challenge for any early 21st Century computer user. Built by the Royal McBee Corporation and first sold in late 1956, this machine is mentioned by sources to be the first personal computer - i.e. the first electronic computer designed for one person to use / operate. The Friden Flexowriter is the I/O device. The Flexowriter is similar to the ASR 33 Teletype in that it included both a typewriter/printer and a papertape storage/reader function. Operational">... [ 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=("yahoo.com.hk; Error sending MAIL command to yahoo.com.">... [ read more ]
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Tektronix 535 oscilloscope cart

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