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PDP 8i sells for $15,000

by billdeg - 01/17/2010
Total messages in this thread: 1
Pictures taken during a visit to a nearby hobbyist. This system was later sold to Vulcan Electronics.
The venerable PDP 8/i system
PDP 8i - 4 full-height racks. ... [ read more ]

IBM 5160 - unsung hero

by billdeg - 01/12/2010
Total messages in this thread: 1
Funny, as much as I use my IBM XT for testing, I never took any pictures of it before.
The empty right-hand drive bay of my IBM 5160 XT computer has been used to test countless floppy disks and hard drives destined for other systems. The reliability of this computer allows me to focus on the drive and any issues that may be related to it, knowing I can count on the computer.
Rear left view of the IBM 5160 XT computer
The IBM 5151 Personal Computer Display
IBM Pics... [ read more ]

Altair 88-MBL MultBoot Loader

by billdeg - 01/12/2010
Total messages in this thread: 1
I won an Altair 8800 Prom Board with an 88-MBL prom installed. Tested. The data loaded into memory matches the code listing in the documentation. To be continued.... [ read more ]

Fido BBS listing node list 6-13-1986

by billdeg - 01/10/2010
Total messages in this thread: 1
I found a copy of a fidonet node list on a diskette. This nodelist is not currently on any archive. In the BBS spirit, one used to have to upload files before one could get into the deeper levels of a BBS. Back then I remember thinking, what files do I have that anyone would want? Fido BBS listing as of Friday, June 13, 1986 -- Day number 164 : 201113 FIDONET node list 6/13/1986 ... [ read more ]

AT&T PC 7300

by billdeg - 01/02/2010
Total messages in this thread: 4
Last Post: [ Correction.. ] 10/05/2014
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 ]

IBM 5144 Display

by billdeg - 12/17/2009
Total messages in this thread: 1
The IBM 5144 was the first "modern" design display made by IBM.
The IBM 5140 PC Convertible Laptop had a lot of add-on features. One of these was an rear attachment for an external display. Pictured is the 5144 monochrome display.
The IBM 5144 the monochrome display made for the Convertible. There was also a color version. The 5144 pre-dated the PS/2 line VGA monitor style, and had the same angles as the 8514 and other first generation PS/2 VGA monitors.
The IBM 5140 came with a customizable menu program and IBM DOS 3.2.
More pictures of IBM PC Convertible Model 5140... [ read more ]

Commodore IEEE Drive Blink Codes

by billdeg - 12/05/2009
Total messages in this thread: 1
This is a copy of text from http://www.6502.org , for my reference, whose source is I assume the owners/repair manual or somewhere else on the web. Disk drive error codes (4040, 8050, 8250, sfd-1001, D9060, D9090) The Commodore disk drives indicated hardware failures detected during boot with a blink code. Here's the meaning from the 8050/8250 service manual: POWER UP DIAGNOSTIC FOR 8050/8250 FLASH CODE On power up, the three LED's on the drive should blink. The drive LED's go off and the center Tri-State LED remains green. The system has a built-in self diagnostic which can be read in the form of a flash code. In the event of a failure, the 3 LED's will blink in a repetitive sequence. The number of blinks between intervals will indicate the possible location of a failure. ERROR INDICATIONS NUMBER OF FLASHES ERROR CAUSE COMPONENT LOCATION 1 Zero Page 6532 UC1,... [ read more ]

Fire Destroys Orig. R.E.S.T.O.R.S Home

by billdeg - 12/04/2009
Total messages in this thread: 1
http://www.trentonian.co...4474191.txt HOPEWELL TWP. Windswept flames 50 feet high yesterday destroyed the local barn where computer programming first flourished, beneath an imported stage that was first used at the New York Worlds Fair of 1964. The 50-by-100 foot building on the property of computer pioneer Claude A.R. Kagan, now 85, gained a reputation in the late 60s and 70s as a hangout for misfits from Hopewell Valley High and Princeton kids whom Kagan said he pulled away from pot and turned on to computers. Early members of that first 1967 computer club in New Jersey, known as the RESISTORS, wrote programs in SAM76, Kagans own early computer language, and even wrote a primer about the language, said an ode to Kagan when he was honored as 2007 Hobbyist of the Year by the Amateur Computer Group of New Jersey. ... [ read more ]

How to Use PET 2001-8 2nd Cassette Port

by billdeg - 12/02/2009
Total messages in this thread: 1
Commodore PET 2001-8's have the built-in cassette player, but many of the internal players no longer work. Here is how to use an external cassette player from a VIC-20 or newer PET: 1. Plug external cassette unit into the port on the far left (facing from the back). The port has slot guides that should match your cassette jack. 2. The 2nd cassette port is assigned the number "2", so the command to access the 2nd cassette drive is LOAD "FILENAME",2 SAVE "FILENAME",2 ..where FILENAME = the file you wish to open. If you have a cassette but you don't know what the name of the program is, you can get a directory by substituting the FILENAME with the * character. Get a pen and write down the file names as the system lists them to your screen. Even a short program will take 30 seconds or more to load be patient. Note that the oldest PET's do not have the ability to i... [ read more ]

TRS 80 Model III Drive Replacement

by billdeg - 11/29/2009
Total messages in this thread: 1
The TRS 80 Model III with Texas Peripherals 10-5355 drives. The top drive in this unit (drive 1) is not functional so I replaced it.
After testing thoroughly, I determined that the index sensor was bad, I could not verify a formatted disk. I decided to put in a new drive rather than fix it. First I put in an IBM Tandon 100 2A, it worked but it looked funny with the "IBM" logo. I settled instead for a TEC FB-2002-TR000 drive. The two drives look different, but they work. More pictures... [ read more ]

Pictures of New Items

by billdeg - 11/29/2009
Total messages in this thread: 1
I received a whole slew of computers, parts, and vintage electronics from Steve and Marcia Plotkin who were clearning out their garage. Here are some pictures. Atari 400 Tricord M40/50 File Server TI Silent 700 AT&T Dataphone II 2248A Sharp HC-4500 Color Handheld Computer Motorola Alpha Mate II pager terminal Unpopulated Series 1 4956 CPU Chassis The rest of the items are vintage electronics, and I put them all in the "items available" directory for future reference until I figure out what to do with them.... [ read more ]

Toshiba T1100 Plus Laptop

by billdeg - 11/29/2009
Total messages in this thread: 1
I ran some tests on my Toshiba T1100 Plus laptop.
The 1986 Toshiba T1100 Plus laptop.
The LCD display is perfect, and the battery still holds a charge. This is rare for such an old laptop, so I periodically re-charge the battery to try to keep it functional for as long as possible. The only issue is that I have to charge up the battery for about 15 minutes before I can complete the boot cycle and load its Toshiba DOS v 3.2.
Bag and docs for the T1100 Plus
More Pictures... [ read more ]

TRS 80 Model 4 drive replacement

by billdeg - 11/29/2009
Total messages in this thread: 1
I have three Model 4's, this one was used last year by one of my students for his class project.
TRS 80 Model 4 with replacement high capacity 1/2-height disk drive.
I installed a replacement drive with 80 tracks / more capacity. Tested, working. If you look just above the new drive you can still see the old metal plate that was covering the original full-height drive. It looks funny so I removed it. More Pictures... [ read more ]

TRS 80 Model 4P with 15Meg HD

by billdeg - 11/29/2009
Total messages in this thread: 1
I ran a series of tests on my TRS 80 Model 4P with TRS 80 15 Meg hard drive.
TRS 80 Model 4P with TRS 80 15 Meg hard drive
I got this one in a trade with Kelly of MARCH, in exchange for a complete Model 1 set up with Expansion Interface.
This system is formatted with Montezuma CP/M and the hard drive is partitioned into A, B, C, and D drive. The disk drives are E and F. There is also an M RAM drive.
More Pictures... [ read more ]

Tip on Copying CBM disks (non-C64)

by billdeg - 11/28/2009
Total messages in this thread: 1
This is a copy of a post from CBM-hackers mailing list, from Steve Gray. I am going to give it a try. "..I've had good success transfering 8x50 disks using a B128, serial cable, cbmlink, and my own CBMXfer (not really required if you can use the cbmlink commandline interface). The nice thing about the B128/600 is its built-in RS-232 port, so there are no specialized cabling or adapters to build. .." Steve Gray ... [ read more ]
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