Search found 365 matches

by dave
Wed Jan 18, 2017 5:42 am
Forum: Files (software, documentation, images, projects)
Topic: OSI 510 ASCII Art Quickref
Replies: 2
Views: 2598

Re: OSI 510 ASCII Art Quickref

Interesting, so you have the older 510 board with the 1702A EPROMs? That matches the schematic in the comprehensive information package, and on Mark's site, but the schematic on the archive (and in Mark's photo) are the newer rev C, which uses 2716's (or 2316 Mask ROMs). Looks like Grant has the 170...
by dave
Thu Jan 12, 2017 12:09 am
Forum: OSI discussion, thoughts, projects
Topic: OSI reproduction project
Replies: 26
Views: 3099

Re: OSI reproduction project

Mile High Test (now called Gardien Services) received the other boards and will start the scanning. Now I have the 470 board depopulated in addition to the 540B. The 470 board was configured as a Parallel port and wave-soldered, and whoever stuffed the board used a dull cutter that flared out the le...
by dave
Wed Jan 11, 2017 7:05 am
Forum: OSI discussion, thoughts, projects
Topic: OSI reproduction project
Replies: 26
Views: 3099

Re: OSI reproduction project

Is anyone interested in a 6809 add on for the 560z. If the proto area is to dense then I would rather a plugin board on the Z80 socket. Maybe add two ROM sockets,RAM and a multi pin jumper that would allow selection of Z80/6809 in situ. Doable ? I think the 510 would be more of a natural basis for ...
by dave
Wed Jan 11, 2017 5:45 am
Forum: OSI discussion, thoughts, projects
Topic: OSI reproduction project
Replies: 26
Views: 3099

Re: OSI reproduction project

PS Emails to glitch are stuck in forum outbox, no reply from your address Dave or glitch's contact webpage. I realy feel downunder. Thanks for the heads up. This prompted me to check my spam folder, which had no spam, but did have 15 emails, either from forum users or forum notifications. I have no...
by dave
Tue Jan 10, 2017 7:14 am
Forum: OSI discussion, thoughts, projects
Topic: OSI reproduction project
Replies: 26
Views: 3099

Re: OSI reproduction project

I think Klyball has already done some upgrades, such as his 470 card with built-in data separator, RAM, and ROM. I would be interested in doing some upgrades, but there is value in just having the original boards in Gerber format. Adding upgrades to scanned boards would require importing the Gerbers...
by dave
Sun Jan 08, 2017 8:23 pm
Forum: OSI discussion, thoughts, projects
Topic: OSI reproduction project
Replies: 26
Views: 3099

Re: OSI reproduction project

The 540B is fully depopulated, and I'm in the process of doing some cleanup. By the way folks, the smoke from the ancient flux on the 540 board completely jammed up the filter element on my desolder station. I had to change out brown, rock-hard filters three times for this one board. So if you have ...
by dave
Sun Jan 08, 2017 8:22 pm
Forum: OSI discussion, thoughts, projects
Topic: OSI reproduction project
Replies: 26
Views: 3099

Re: OSI reproduction project

I already have the 555 done and boards made All right then. I'll tell them to hold off on the 555 for now, and will use the funds toward scanning other boards. The 430b would be an excellent addition. I have one of these but would be reluctant to depopulate it for scanning. I have been working on a...
by dave
Sun Jan 08, 2017 1:16 am
Forum: OSI discussion, thoughts, projects
Topic: OSI reproduction project
Replies: 26
Views: 3099

OSI reproduction project

Adding to Glitch's initiative, I have sent off a few bare boards to be scanned to Gerber: 505 - CPU / Disk controller 555 - Jungle Board 580 - 8-slot backplane A15 - I/O expansion board 498 - Extender board 573 - EPROM programmer head-end board 575 - Prototyping head-end board I am in the process of...
by dave
Wed Dec 28, 2016 6:09 am
Forum: Files (software, documentation, images, projects)
Topic: The CHALLENGER 1P Technical Report
Replies: 2
Views: 716

Re: The CHALLENGER 1P Technical Report

You're right! The title seemed familiar, somehow, but I don't think I've seen this particular document before. Thanks for sharing!

Dave
by dave
Wed Dec 21, 2016 12:39 am
Forum: OSI discussion, thoughts, projects
Topic: OSI 560Z Clone?
Replies: 23
Views: 17111

Re: OSI 560Z Clone?

Very nice! You can count me in for a couple of those boards.