Tuesday, 8 July 2014

Last tiny parts arrived

Today the last tiny parts (eproms) arrived from the USA.
These UV-eproms in CLCC (Ceramic Leaded Chip Carrier) are very rare and hard to find!

All these CMOS-parts are TTL/NMOS-compatible:

  • PLCC Rockwell 65c02 is compatible (not pin-compatible) to the 6510 except the I/O-port. I will use two VIA-outputs to control LORAM/HIRAM.
  • 65c22s will be my replacement for the 6526s. The ports are only exchanged but I have to modify some timer/interrupt programming in the kernal.
  • SDT71024 128k very fast 15ns SRAM as DRAM replacement. I just buyed some rare SOJ-sockets for it.
  • 65C51 as serial interface. An upgrade to the bit-banging RS232 in the real C64.
  • AT27C256 will be my KERNAL/BASIC and an optional expansion cartridge eprom.
  • Atmega 8515 is my SID-replacement: SWINSID - thanks to Swinkels!
  • GAL22V10 as adress-decoder - my PLA ;-)