Cameron Kaiser:
> * CHESSmate (thanks Martijn van Buul) -- contains 6530 RIOTs, for you KIM-1 freaks
and from the page:
> 6530 RIOT (identical to KIM-1; 64 bytes RAM, 1KB ROM, 2 I/O ports, 8-bit timer),
> [...]
> The 6530 RIOT chip is identical to the twin RIOTs in the KIM-1, a
> custom multifunction chip developed by MOSTek originally for that
> system though versions of the RIOT also appear in the Atari VCS. The
> MOS 6532 is not compatible with the 6530, however, and the 6530 is
> unfortunately no longer manufactured.
6530s have been used in several Commodore boxes. Especialy within
FD units. But they are _not_ identical to any KIM-1 6530, same as
the 6530s on the KIM are not identical - The CS logic is always
specific to each of the Models (althrough some have used the same
schema) and of course the ROM content differs. Also some versions
used less CS lines to recover some I/O lines.
The 6530 was also not a special developed for the KIM, the KIM is
only the most visible device using it. The idea of the 6530 was to
offer a solution for small designs used in lagre quantity products,
where the Chipcount is esential, and an additional ROM will raise
the cost - and since such products, at least at this time tends
to use ROMS, a genuine ROM production run has to be done any way,
the usage of an 6530 lowers the cost, since the production process
is the same from the customers view than with a ROM.
Also the 6532 is somewhat compatible - this schould be changed
into 'not pin compatible'.
But beside that - nice page - great work - thank you.
Hans
--
Ich denke, also bin ich, also gut
HRK
Received on Fri Nov 13 1998 - 07:58:24 GMT