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Directory /pub/cbm/firmware/computers/vic20/

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Disk drive firmware
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VIC-20 and VIC-20CR schematic diagrams

VIC-20 parts and firmware versions
Commodore VIC-20 BASIC V2. The first and only version.
Commodore VIC-20 character generator ROM.
Commodore VIC-20 character generator ROM for Swedish/Finnish character set.
Commodore VIC-20 KERNAL ROM, revision 6. Intended for NTSC-M systems. Probably not the first revision. But not the sixth revision either, since the BASIC ROM has the same part number.
Commodore VIC-20 KERNAL ROM, revision 7. Intended for PAL-B systems. Probably the last revision.
Commodore VIC-20 KERNAL ROM, 901486-07 version patched for Swedish/Finnish keyboard and character set. Chip markings: NEC JAPAN P22489-207 / D2364C 689 UE12 (Yes, it is a 8kb*8 mask-programmable ROM!).
Lists the differences between the VIC-20 KERNAL ROMs 901486-06 and 901486-07.

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