Kees's Computer Home: Study room

Philips P2000M, Tandy Model 4p

On the left the first Philips P2000 computer, the P2000M. It originally was a word processor only, running off a rom cart and using the floppies for saving text only, but later there also appeared a basic cart. Even later a home version of the machine was released the P2000T, that could be hooked up to a TV and used small cassettes to store programs. The cassette recorder was totally operated by the computer, sort of like a disk drive complete with a directory. Next to it a TRS-80 Model 4p.

Grid laptop, ZX81

A Grid XT laptop, here masquerading as a Philips PC200. It has the extension box which had two standard ISA slots. I managed to cram a Plus Hard Card and a network card in there, so the machine is actually usable, much more than if you only had the single 720K drive to use. Next to it Clive Sinclairs ZX81, the even cheaper follow up to the ZX80.

IBM M80

I don't know if this one counts as an old computer already, because many of them are still doing duty today, but it was a landmark: The IBM PS/2 Model 80, IBM's first 386 system. This one runs SCO OpenServer 5.0.2, the Free SCO Unix, on a 300MB SCSI drive off an Adaptec MCA SCSI controller. I found the Adaptec in a junk box at a flea market where it was thrown in among many other PC cards, not even an antistatic bag around it. It had been there all day, and many people had been digging through the box, but when I put it in the Model 80 it worked at once.

CM110 CDROM drive

This is a unique machine: the very first SCSI CDROM drive ever. It is a Philips CM110, manufactured in July 1987. It is built like a tank and today still runs flawlessly. Philips invented the CDROM technology and this is the first SCSI CDROM drive they built. It has the same mechanical innards as the first audio CD drive, the Philips CD100, but with other logic boards. It was not very fast, its throughput of 36K would rate it a one quarter speed drive today. I used this one to install the operating system on the Model 80 above. There also existed a CM100 CDROM drive, which ran off a proprietary interface card for the PC. That one was a lot cheaper. The CM110 has an extra board inside, which converts SCSI to the proprietary protocol.

CM121 and CM201 CDROM drive

These drives are the second CDROM drive Philips produced. You see here the CM201 internal model on top of the CM121 external model. On top of the CM201 is the strange caddy-like device you had to use to place a CD in the drive. It was not a real caddy because a part of the device would come back out of the drive after the CD was loaded. The drives were faster than the CM110 tho. The external version was with a SCSI interface also available as the DEC RRD40.

Intel 8008 in chip carrier

While looking for something completely different in my study room I found this original Intel 8008 chip. It is mounted in a strange chip carrier, obviously meant for easy replacement. I think I'll leave it in there, it will be much safer :)


Back to the Computer Home page