osiweb.org

Unfortunately, I do not have the means to dump any of the board. :? From the photo, it looks like your board is the older rev with four 1702A EPROMS, which most modern programmers cannot recognize. I do have a 1702A programmer, and if you are willing to send me either the whole board, or just the E...

Grant is right, you need to eliminate the RF modulator. That pathway can't handle the bandwidth of the 64x32 video, and could be the explanation for what you are seeing. Is there any way to find a TV or monitor with direct composite input?

The images are up. Thanks!

Dave

Nice work, Bill--Thanks for undertaking this project. The sources I have originated from Ed's collection, and I don't know if the sources are original, or disassembled from the binary. Since he also distributes a version of the A65 assembler, it's no surprise that the code is compatible with A65. Si...

And lastly a little off-topic, At the same place I got the 4P, I found an "OSI 510 CPU" in a sad little dust covered box. I couldn't find it on the hardware list so... what it it? (It is NOT in the 4P, just got it on the side) That's a CPU for a Challenger III. It has a 6502, 6800, and Z-80 on it. ...

Hi Generic User! Welcome to the site. Congratulations on finding a really nice system! It is definitely fixable. The knob on the back sets the baud rate (data rate) for the UART to various speeds from 300 to 9600. At those low clock speeds, that setup will probably work, but it's not good practice t...

Yes, I need to get those up. I am thinking that there is now enough material that I will need to improve the organization of the site to make things easier to find. Not a bad problem to have. . .

Dave

That's awesome!

@Bill: Nice. I never heard of that one, but I just downloaded it, and it runs just fine under Wine (under OS X). It looks like a really impressive tool, obviously a lot of work went into it. Thanks for the pointer!

Dave

The code compiles with a65, which compiles on just about any platform. I have been using Ed's version, which is available from his website, Ed's DX-Forth and Utilities Page . I will admit I have never used that form myself, but rather the shorter form with the implied 'A'. Adding in the 'A' doesn't ...