Compupro System Number 2

I purchased this system in April 2013. It cost $510 plus shipping. That was well worth it. The boards it contained were worth much more than that. It contains the following boards (* have manual):
Macrotech MI-286 CPU V1.2 *
Macrotech MSR 512 KB DRAM
Compupro RAM-21 128 KB DRAM 190B *
Compupro RAM-21 128 KB DRAM 190B *
Compupro Selector Channel 172C (removed) *D
Compupro Disk 2 HD Controller 177C (removed) *D
Compupro Disk 3 HD Controller 194D (removed) *G
Compupro Disk 1 FDD Controller 171F *
Compupro System Support 1 162G *
Compupro Interfacer 3 174C *

Search of Web did not find manuals for mismatched manual versions. The Selector Channel, Disk 2 and Disk 3 were removed since they will not be used in the final configuration of this system. I will probably use a simple PATA interface to a more modern HD.

Here is a picture of the system:

Compupro 8/16

Initial tests showed the following:
Initial power up (with all boards):
9.45V (at PS Capacitor)
16.66V (at PS Capacitor)
-16.66V (at PS Capacitor)
No odd sounds
No smoke
No fire or hot components with several minutes of run time.
No sign on message from System Support 1 nor Interfacer 3 serial ports on reset. This may be perfectly normal without an operational disk system of any type attached. All RS-232 voltages are normal on all ports.
System Support EPROM label reads "GO86".
Disk 1 board EPROM label reads "Boot F 68/85/86"
Z80 led lit on CPU board.

Search of Web did not find manuals for mismatched manual versions. The Selector Channel, Disk 2 and Disk 3 were removed since they will not be used in the final configuration of this system. I will probably use a simple PATA interface to a more modern HD.

I have an operational Compupro 85/88 system. I may have to use this to test the boards that are in the 8/16 system. Initially, I may just burn a version of my monitor to operate on the Z80 side of the MI-286 CPU card with the current RAM and a serial port off the Interfacer 3 or System Support 1 boards.

Bill

1632 MST 26 April 2013

THIS WAS POINTED OUT AS A BAD IDEA BY Herb Johnson. He suggests connecting a set of 8-inch disk drives to the Disk 1 board and attempt to boot a standard Compupro boot disk. I will follow his suggestion.

Bill

1157 MST 27 April 2013

This system did boot with each of the disks provided by Herb Johnson. The jumpers on the FDD 200-8 drives were not quite right. I modified the jumpers on a pair of FDD 100-8 drives. These drives did boot. I will mount these drives in a drive cabinet and dedicate them to the second S-100 machine. I still have one more FDD 200-8, which I may put in the B drive position.

Bill

1814 MST 11 May 2013