SYM-1 vs KIM-1 (was Re: MOS Kim-1 Any idea of it's worth/value?)

[Dwight K. Elvey]

>From: "Ethan Dicks" <ethan.dicks at gmail.com>
>
>On 4/12/05, Scott Stevens <chenmel at earthlink.net> wrote:
>> Being the 'root for the underdog' sort of person, I'd say 'Synertec rulez, 
MOS sux'
>
>Well... since I _have_ a SYM-1, and had the books for it many, many
>years prior to locating the computer (like 20 years earlier), I'm
>pretty fond of the SYM-1.  I also like the fact that the SYM-1 does
>_not_ use mask programmed parts (but the KIM-1 does).  Other than
>that, they are really about the same machine.  From a programming
>standpoint, I am unaware of any significant differences.  I know they
>could share peripherals.
>
>Speaking of peripherals, I remember lots of ads back in the day,
>including one for an S-100 chassis for the SYM/KIM.  I'd love to see
>schematics for that, especially since if I ever have one, I'll
>probably have to make my own rather than find one in the wild.  I have
>a few S-100 cards now (something I didn't have back in my PET days),
>and it might be fun to do some driver coding for interesting things.

Hi
 There were actually two S-100 bus extensions on ebay recently.
There was the one that was stated as such and there was one
that was described as a controller for a floppy drive and drive
( I forget which machine it was stated as being for, SYM1, KIM1
or R65 ).

>
>I _do_ have (somewhere) the stuff relevant to hooking Commodore IEC
>peripherals (1541, 1520, 1526...) to a SYM.  That's another thing that
>would be fun to implement... disks and files on a 6502 SBC.

 I do have a card that was intended to be used with the SYM-1 to
drive floppies. When I got it, it was missing the code ROM and
a data bus buffer. I've since located the code but the buffer chip
has been a problem. It is one of those oddball national chips
that can not be easily replaces by a '245 :(
If I ever get one, I should be able to bring up the original SYM DOS
that was really limited. Still, it would be fun.
Dwight

>
>So many 6502 projects, so little time.
>
>-ethan
>
>