Sol-20 software

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I'd be happy to host them here and give you a tip o' the hat. Do you have any paper documents you could share? Check out my Sol manuals page , and if I don't have it already, maybe it is something that I could scan and put online.

Do you have any Sol program tapes? Or, barring that, maybe you could duplicate the tape, or mail it to me so I can clone it and mail it back to you. It toggles the interrupt enable line on the CPU on and off at a fast rate; after a low pass filter, three part harmony was generated. This worked because the Sol did not use the interrupt line. Both are located in his code repository.

They also solicited contributions of programs, which they would periodically bundle up and sell on cassette tape. Here are some of those collections. Below the zip file contains the binary. If you have any of the other collections hiding in a shoebox in your basement and want to help preserve the bits, please contact me. Be careful not to run any transient programs. COM file for later use. That's it. Another way that would conceivably work would be to have the program in the form of an Intel HEX file.

RDR: might not be the right device; use whatever your serial port is mapped to. HEX file to a. COM file. Well, that's in theory. I found that when I transferred large programs, the Sol would have to save a block to disk on occasion and the serial line would drop characters. I don't yet know enough about the serial interface chip on the Sol to know if it supports hardware flow control, which would prevent this exact problem. If you can get this to work on your machine, or know why it doesn't work on mine, let me know.

The first program, nsboot. There is some relocation trickery involved in the process. Although most of it makes sense, there are a few things that I am unsure of in the program. If you know what is going on there, or even have just some guesses, let me know.

The boot PROM reads sector 4 of track 0 off the disk and jumps to that code. There is nothing in the boot prom that is Sol-specific either.

The second program, dboot. This is B long and has some other black magic and vestigial code. This site used to have each chapter of the Sol Systems Manual broken out as a separate document, which was probably somewhat inconvenient to download.

A recent contribution has caused me to reassemble this manual into a single pdf after cherry picking the best parts of various sources. Chapters of the manual mostly came from Roger Lewis's website at www. It is mirrored here with his permission. It appears he let the domain go and someone else has picked it up, and with a name like that, you know it is worth a visit.