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:
Elektor Junior ASSM/TED
MAE ASSM/TED for the Elektor Junior
Adapted version for the Junior of the KIM-1 MAE. Adaptations from the KIM User Cl...
KIM-1 Macro Assembler Editor
I bought MAE in 1980 for Use Schroder, Ingenieur bureau Schroder, as a package for the KIM-1. As did some friends in the...
MAE ASSM/TED CW Moser
MAE (Macro Assembler Text Editor) or ASSM/TED is a program sold by Eastern House Software for the KIM-1, Apple, PET, C64...
SYM-1 RAE
SYM-1 Resident Assembler Editor RAE
Written by C.W. Moser, other versions known as MAE or ASSM/TED. RAE is an optional ...