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:
MTU K-1007 PET MTU bus interface
The K-1007-1-PET is an interface between the PET 2001 and the MTU/KIM-1 bus. This allows MTU products to be used on the ...
MTU Catalogs, Product Descriptions and Newsletters
Here you can find the product announcements from MTU. Starting with KIM-1 products like the K-1008 Visable memory in 197...
MTU K-1005 Card File and Motherboard using KIM/MTU bus
A passive card cage and 4 -slot bus for KIM-1, SYM-1, AIM 65 and PET Commodore.
Note that the KIM/MTU bus is stil...
TECMUMAS, dem Technikmuseum Matthias Schmitt
In Bad König, Westenwald, Germany, Matthias Schmitt and his wife have developed a museum dedicated to Technik called T...