MK61 reverse engineering
From Felixl.com
Jump to navigationJump to searchThis page is dedicated to reverse engineering of old russian programmable microcalculator MK61.
It is notable for it's unique architecture -- sequential bit processing, ring memory architecture, serial data bus.
The chipset is based on 145IK13 series microcontroller with different masks for different functions :
- 145IK1302 - master microcontroller: Display and keyboard drivers, memory partitioning, main functionality, synchronization
- 145IK1303 - slave microcontroller (slave 1): extended math functions: sin,cos ... etc
- 145IK1306 - slave microcontroller (slave 2): extended logic functions: OR, XOR ... etc
