C64 (Breadbox)

Kernal: 8K 2364 ROM chip 901226-0x, where revision number is “x”. Available revisions are : 1,2 or 3(latest).
0000-1FFF = Kernal ROM (901227-03), located at $E000-$FFFF.

This is a 2364 ROM and is NOT pincompatible with a 2764. You will need an adapter to replace the ROM with an EPROM.

 



C64C (C64E, Short board)

Basic and Kernal combined on a 16K chip, U4, 251913-01.
0000-1FFF = Basic ROM (same as 901226-01), located at $A000-$BFFF
2000-3FFF = Kernal ROM (same as 901227-03), located at $E000-$FFFF
Pincompatible with a 27128 eprom.

 

Use 251913-01 ROM or combine basic and kernal yourself:

 

Custom C64-E ROM (32K, switchable between standard and dolphin dos2):

0000-1FFF = Basic ROM (same as 901226-01), located at $A000-$BFFF
2000-3FFF = Kernal ROM (same as 901227-03), located at $E000-$FFFF
4000-5FFF = Basic ROM (same as 901226-01), located at $A000-$BFFF
6000-7FFF = Dolphin DOS 2 Kernal, located at $E000-$FFFF