osiweb.org

Hi Mike,

Thanks for the uploads! I somehow didn't see them until now. I will look through these and post them on the site. It looks like you also uploaded some additional binary files as well the monitory ROMs--do you have any documentation on these?

Many thanks for the contributions!

Dave

Hi Joaquin, Welcome to the OSIweb forum! I like to think OSI'ers are a special breed of computer owners. So glad you joined us! I'll try to bring an OSI setup to one of the upcoming North Texas Retrocomputing meetups. That means I'll have to get something working first ;-) Meanwhile, take a look aro...

Hi Mike, You could re-map it anywhere. However, it was easiest to remap to F400, since it could be done with little circuitry. I did this on my 502-based machine, but I believe the 505 is pretty much the same. The easiest way is to remove the 502/505 block-remapping circuitry, and just hook the addr...

That's not a bad starting point. Would love to follow your progress on this. Some photos would be super!!

Dennis, That's fantastic progress! Some pictures would be awesome. So, you're driving the TV through a built-in RF modulator? I think you'll get a MUCH better result bypassing the modulator and using the video out directly, if you can find a TV that has a video input. Even better, if you can get an ...

MK14HAK wrote:Dave how about starting a WANTED topic for requests for software and hardware ....

Done!

http://osiweb.org/osiforum/viewforum.php?f=7

C4P with two floppy drives (but no disks). Ebay auction# 261281476008. Current bid is >$1000, with 6 days left. Looks like it's in great shape. I would LOVE to have this system but it's out of my price range :( Steve Yes, looks nice, but very pricey. I am guessing at these prices, more OSI stuff wi...

Just saw this C8P on ebay. It's kind of pricey, but looks like a really nice setup: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=221279347505&ssPageName=ADME:B:SS:US:3160 If anybody here ends up with it, would you consider scanning some of the documents (such as the Boston Users Group newslett...

Denis, Your findings are promising. With respect to the memory, I think you've established that that the memory chips should be fine. When you insert chips in the higher 2K, have you tried limiting the memory size to 6K (6144 bytes) on cold start, to see if your system is stable? Also, is the system...

Hi Denis, Is the RAM socketed? If so, try removing the upper most 2K of RAM, and confirm that the 4K is detected correctly. Then, insert one pair of the new chips to see if 5K is detected, is should show about 4351 bytes free (I think, depending on any mods to the BASIC firmware). If that doesn't wo...