The 6530 and 6532 are very close in functionality.
Nearly the same timer, 2 8 bit I/O ports, RAM.
With an external ROM and some clever addressing logic many 6530’s have been replaced with a 6532.
Here some examples:
- KIM 6530 to 6532 for a KIM-1 clone
- KIM 6530 replacement board
- Allied Leisure pinball machines
- 6530 replacement Commodore
- Gottlieb sound board
- Corsham replacement board for the KIM-1
- Eduardo Casino 6530 replacement board for the KIM-1
- Retrospy Technologies 6530 replacement
Design by Dwight Elvey

See also:
MACH-9 MMS Inc 6809 CPU Plug-in for AIM 65
Royce Taft has a MACH-9 MMS Inc 6809 CPU Plug-in for AIM 65 and reverse engineered it.
He sent me his design to be pu...
PicoSYM, a SYM-1 emulator on a Raspberry Pico
Emulation of a Synertek Sym-1 on a Raspberry Pi Pico 1 (W).
By andysa on the emulation forum on 6502.org
Here is t...
Amazing it works!
After publishing the photos of the transistors used in the KIM-1 a discussion started on forum64.de in the 'Instandsetzu...
Transistors in the KIM-1
Even a microprocessor based computer as the KIM-1 required some simple transistors.
To drive the LEDs some extra curren...