Recent content by Al Kossow

would it be possible to get a copy of the schematics to add to the information on bitsavers?

here is the actual standard http://bitsavers.org/pdf/dec/standards/EL-00092-00-0_F_Finish_and_Color_Standard_Dec82.pdf page 53 specifies "Brite Rose" and "Morris Maroon" specified by the supplier of the silk-screen ink

I'm about to start cleaning up a sad looking MMD-1. I notice it has a 6.75 MHz crystal on the 8224. It must be dog slow.

This has been discussed MANY times. There were no Pantone colors

Is the card near the core memory? Do you have the core memory shield card in place?

Could someone upload the original 1.7 213AE firmware from soviet9932? I didn't uload it to bitsavers and the link is now dead I pushed a bunch of Informer information to http://bitsavers.org/pdf/informer yesterday

check the caps and the rectifiers. the transformers shouldn't be buzzing

all of the pictures are up now

Not in-circuit. You would have to force logic inputs high or low when they are being driven by other ICs There was a scheme HP was promoting that Atari used on some 80s arcade boards called signature analysis which put a board into a state where a known bit pattern would be produced on an...

I just sent you a DM with an invitation

https://en.wikipedia.org/wiki/George_Morrow_(computers) was this one of the systems from Eddie in Union City? if you care, someone was asking a few months ago who made the enclosure it was Buckeye Stamping in OH, who is still around

You can find the manual for the disk here http://bitsavers.org/pdf/fujitsu/disk/M2301_M2302 The interface is not the same that the Shugart/Quantum 8" used. Another little annoyance getting them imaged. They don't work with the 8" adapter for the MFM emulator

I'll see if I can get pictures taken today after I clean the dust bunnies off of the boards. The system was in poor condition, so I just saved the boards and back panel connectors. The system is slightly different from the Decision, which has the I/O ports on the motherboard. I have several...

I uploaded a couple of mechanical drawings and this picture to http://bitsavers.org/components/akizukiDenshi The pins are designed to side mount to through-hole pins of a specific board thickness I've not been able to find a US source The only other pins I know of are Flip-Pins...

there are regulators on the motherboard I just ripped apart one of these systems (didn't save the supplies) and I haven't had a chance to take a picture of the backplane yet