By Bob Applegate
Adding I/O devices that don’t need much address space. On the KIM-1, the space from 1400-17FF is grouped into the K0 block but only 17xx are used, leaving 1400-16FF open for use. To decode that range into four blocks of 256 bytes is easy using a single chip and a few signals from the KIM Clone expansion bus:
Everyone has a 74LS138 in their parts collection, so just connect a few signals from the expansion bus and use one of the three signals from the 138 to decode which block you want to use. Use the A0-A7 address lines to decode into smaller pieces.
See also:
Tiny Basic
Tiny Basic for the KIM-1 and the TIM in the Superjolt
Tiny Basic interpreter Copyright 1976 Itty Bitty Computers, used ...
The KIM-1 family
Rockwell AIM 65
Synertek SYM-1
MCS Alpha 1
KIM UNO
KIM-1 Simulator
The KIM-1 is one of the first computer...
Cubit KIM Bus for AIM 65
K-1008-2L Patches to Microsoft BASIC
Patches to Microsoft Basic K-1008-2L sources, binaries and demos
This package was distributed as a manual and a cassett...