Monday, 23 February 2015

PLCCs in 1541-Floppy

I found the error in my 65c02-PLCC-adapter and tested both adapters in a 1541.
They worked without any problems - they are fully NMOS-compatible.

Friday, 13 February 2015

C64 runs on breadboard with TFT

Now I connected the AVR-TFT-controller to the VIA-port (2-wire clock/data).
I modified my AVR/TFT-kernal so that it uses the 65c22 timers and interrrupts.
After some troubleshooting and debugging the C64 BASIC runs !!!!!!

Wednesday, 11 February 2015

First PLCC testing

Now I built PLCC-adapters for my breadboard for the 65c02 and the 65c22.
The 65c02s in the adapter didn't work - I don't know why - I didn't find any errors?
For the RAM I built a SOJ-adapter for the 32k ISSI-SRAM.
65c22 and RAM worked well!

Saturday, 7 February 2015

First breadboard-computer

I built a first breadboard-computer with a 6502 CPU, 6522 VIA, 6116 RAM, 27C256 EPROM and some TTL-adress-decoder:

I wrote a small test program that stores the digit-combinations to the RAM and counts from 0 to 9 to test the system.
I need shorter jumper-wires ;-)