On 2025-06-02 13:26, Bill Degnan via cctalk wrote:
Do you know the controller model number?
OK, I tore into mine tonight. Here's what I see.
My machine is a PC 6300, the CPU 2 model. (I have three of these, and
another of them was marked CPU 3/X. Didn't check the third.) It was
built in 12/84 by Olivetti in Italy.
The two cables from the drive enclosure go to DB-25 female connectors on
two separate cards. In fact, it appears that other than sharing an
enclosure and power supply, the two drives have nothing to do with each
other.
The disk controller (marked with a red dot on the connector on my
machine) was made in 1987. It is a 1/3-length card, a WD1002A-WX1.
There are flying wire ends of a ribbon cable from the data and control
header plugs to the DB-25 connector, which is in a separate slot from
the card. Looks like a pretty standard MFM controller to me, not SCSI
in any way.
The tape controller (marked with a green dot on the connector on my
machine) was made in 1986. It is a full-length card, a Wangtek
30006-007 rev C. It has an 8085, 8257, 6264 SRAM, 2764 EPROM, what
appears to be a chipset of 2x CF40100BN, 1x CF40101N, and 1x CF40102N,
and some PALS marked Everex. I couldn't Google up what those CF4010...
ICs do very readily, although several sellers claim to have some. There
are two cards which are almost identical on Ebay right now, items
393821606763 and 201549538949, although neither of them has the DB-25
connector on the bracket. On mine it goes to a ribbon cable, which goes
into the header by means of flying wire ends.
The drive enclosure is an AT&T Comcode 405117714 (I guess I'd take that
to be a model number, since there isn't any other), with FCC ID
CLP77N187072. It is made in USA and contains a 20 MB hard drive and a
60 MB (or 67 MB according to the Iotamat tape I have in mine) tape
drive.
It occurs to me that although I occasionally see AT&T 7300/3B1 systems,
I rarely see 6300s. Somehow I happened onto the three that I have a
long time ago and that was it.
Richard KF9VP
