9
Label
Address Range
K1
0400-07FF
K2
0800-0BFF
K3
0C00-0FFF
K4
1000-13FF
JP6 – 1K ENABLE
These jumpers are normally installed. They control whether an address in that
particular address space will be mapped to the on-board RAM The four jumpers
and their corresponding address rages are:
Label/Address Range
Normally Installed
0000-1FFF
No
2000-3FFF
Yes
4000-5FFF
Yes
6000-7FFF
Yes
8000-9FFF
Yes
A000-BFFF
Yes
C000-DFFF
Yes
E000-FFFF
Yes
Addresses 000-1FFF are part of the KIM’s lower 8K which are always mapped to on-
board RAM, ROM, timers and I/O devices. Putting in the jumper for 0000-1FFF will
cause a lot of confusion as multiple devices will respond to the same address.
Addresses E000-FFFF are also affected by JP1, so if the jumper is installed for that
block, then JP1 determines if the space is mapped to RAM or EEPROM.
Expansion Connectors
The primary improvement in the Rev 4 design is the addition of many bus signals on
two edge connectors to make it possible to add custom designed add-on boards.
Please note that none of the signals are buffered so it is highly recommended that
any external board provide its own buffer so as not to load down the bus too much.
Any pin marked as reserved is not connected to any signals on the KIM Clone, but
are meant for specific uses on motherboards. Please do not use them for custom
boards.
