PROMS ANYONE?

[intersections]

I just picked up a sym-1 and am in the process of getting an aim-65. Both systems had additional PROM's available when they were first released. Like most things it is difficult to find information much less hardware for these classics. The SYM-1 had I believe both basic and assembler in PROM. The AIM-65 has the basic normally but could include Assembly and ? PL65?
What does everyone think? Any Idea where these old proms might be found?

[Dallas Shell]

I have several SYM-1's that I bought in 1979 and have used extensively. I have the RAE and BASIC for the SYM. They were both made to run from ROM or EPROM at specific addresses. Some people back then re-assembled the assembler and BASIC to run from RAM as I recall. They then filled up the address space with RAM and loaded whicever program you wanted from disk and ran it. I do have the object code and probably the source code for both. I have seen a sight that has all of the object code for the SYM and RAE, Basic, etc that you could download and burn into eproms.

I also have a Disk Opperating System that I have used for years on the SYM. It was written by a guy in Japan and he gave me the source code for the DOS. I made up the interface electronics and it works great. It will interface will all of the SYM applications (MON Basic RAE etc) and uses IBM style disk drives.

I have one AIM that I do not have the ROM chips for. Someone had removed them and had it running a custom application. I may like to get a copy of yours if it has any. I have been looking at http://www.armory.com/~rstevew/Public/Roms/
where you can get the AIM Forth, PL65 and Mathpack object code that could be burned into eprom or loaded by tape or disk into ram at the correct address.

[Dallas Shell]

I just looked thru my favorites for the place that had the images of the PROM for the SYM and AIM. Look at the following site where you can download anything you want for either of these machines. The one thing I do not know, is , what it takes to get from the PC to a EPROM. You would obviously need a programmer that would connect to the PC.

As I recall, I programmed my RAE and BASIC into 2716 or 2732 EPROMs. I did this using hardware and software that I wrote to run on the SYM.

http://highgate.comm.sfu.ca/~rcini/clas ... y_docs.htm

[esarintulo]

Hi,
you sure did a lot with your Sym but why not provide us with more details on how to interface it to a diskette drive (schematics) along with the Dos source you must still have ????
It's Christmas.......

René.

[Dallas Shell]

I posted photos of most of the SYM thing I mentioned in the Nostolga section of this fourm. I did neglect to include the schematics, I have uploaded them at http://www.gbronline.com/n5fee/
I don't know of a good way to display the source code for the DOS, the only format I have it in is on the SYM. I would somehow have to transfer it to the PC. If someone needs it I can work on a way.

Dallas

[esarintulo]

Wow,Dallas Shell,for sure that's A Sym !!!!First time i see such a professionnal looking buid-up.
Gives me a lot of good ideas,thanks.Now if only i could find thoose
2x22 connectors in France ......
As for the Dos source,do your best,do your best,it's the only thing
i can say.That ,along with all the doc Mike is going to put on 6502.org,
will make the Sym a real winner.
AAHH,at last,Christmas came true !!
René.

[Dallas Shell]

If you do not find the connectors in France, they are avaliable here a few places. This style of connector is not used very much here anymore. It is something linke 0.156 inch center to center, as I recall. This was a standard connector in the 1960's and 70's but was replaced by newer connectors that were based on 0.1 inch spacing by the early 1980's.

I would recommend finding something that is avaliable in your area with the greatest frequency and building your projects using what you have. I would then get just a few of these 44 pin connectors and make an adapter to adapt the 44 pin to your new choice. It does not really matter what you pick as long as there is more than 44 conductors.

I am not that familiar with what is happening in Europe, but surely there are surplus connectors, and mating project boards somewhere. I have used this technique of connecor conversion on a lot of projects. You get to make up your own standard using what you can find.

I did a search on google and found the following link that has the 44 pin SYM, AIM connector pretty cheap. If you don't find some, I could always order you a few and mail them to you. The postage would be much more than the parts cost though.

Dallas Shell



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