Spare Parts

Spare Parts
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This used to be a parts-for-trade page. Most of these are already gone, but I'll leave the info here in case anyone is interested in seeing what they look like.

M8012 BVD11 Bootstrap/Diagnostic ROM board

This board contains a bunch of stuff, including:

Bootstrap/Diagnostic ROMs
lots of empty ROM sockets
LTC (line clock)
Terminator
Run/Halt/Restart switches

This board is well documented in the Microcomputer Interfaces Handbook. This board will be what you need if you are building a PDP-11 using a bare card cage and no front panel. I don't know if those are the original ROMs, or if someone has changed things around.

DSD 4140

This is an RX02 compatible controller for 8" floppy disks. Data Systems Design is a long since defunct company that made PDP-11 boxes stuffed with both DEC and their own custom boards. I have digital photo's of the manual for this board.

DSD 8240

This is a controller for 8" Winchester disks and a Kennedy tape drive. The connector on the left is for the tape, the center connector is for the Winchester control cable, and the two small connectors are for the individual Winchester data cables. This is not an ST412/ST506 MFM compatible controller, as in IBM PC and Seagate ST225. It handles an older standard that hardly anyone still alive remembers, called SA-1000. This board was used with a Quantum Q2040 40 megabyte Winchester disk.

It makes the Q2040 look like 3 RL02s, and the hard drive controller registers are RLV12 compatible.

The large chip near the D connector is a Signetics 8X305 TTL microprocessor. This chip is also used on the UDC11. This chip was blazing fast for its day, around 10 MIPs (and also blazing hot). It used a Harvard architecture, and a rather strange instruction set. I have digital photos of the manual.

Interlan Ethernet card

I can tell this is an Ethernet adapter because it has an Ethernet address sticker on it. I have no documentation for it. Notice that it is a double-decker.