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Nice! Congratulations.

Hi Rich, What was the file size of the hex file and the binary? I haven't seen the source of CLEAN, but I imagine that it looks for track and sector headers to extract the meaningful data from the raw data, ignoring garbage bytes between sectors. That way, if you want to verify you have a good image...

Hi Rich, That's fantastic! An easy way to convert the hex dump to a binary file is to use the free SRECORD utility to convert it. The command line would look like: Assuming you want to convert a file called "dump.hex" to a binary file called "dump.img", you would use a command line like: srec_cat du...

From the schematic you posted, try adjusting R9. It may cause the overall display to brighten or dim, but if you are looking at reflections due to impedance mismatch, you should find you are able to identify a point of minimum snow, relative to the characters.

Beautiful!!

Welcome!

So glad to have you here

Dave

Oh, man! I just saw this thread. I wish I had seen it prior to the end.

Did anyone here win the auction? It would be awesome if copies of those ROMs and manuals found their way into the archive. . .

At a glance, it looks correct. 1 start bit, 10101010, 1 stop bit.

The blue trace looks like clock + data pulse for 1, clock only for 0, providing the frequency modulation. Each pulse in the blue trace should be close to 400 ns.

I believe OSI used shift-O as the rubout function. I can't remember if any of the software platforms actually used the rubout key.

Dave

Cool. So can you confirm that their listing them as 1024 bit (256 x 4) is a typo?

Thanks,

Dave