It's true that there were multiple revisions of the DTV ASIC... Three to be exact.
Rev 1 was used in the US 2004 production shipped to QVC and KB Toys.
Rev 2 was used in the first production of PAL DTV's for Toy Lobster.
While the Rev 2 ASIC was already in production the Hummer Racing software team discovered a bug in the blitter that caused black vertical lines in transparent blits. The bug was corrected and Rev 3 was used in Hummer and the next productions runs of PAL C64 DTV's.
Rev 1:
NTSC Only
DMA,(no blitter)
SRAM Support Only
Two Crystals
No Illegal Opcodes
Extended High Color Video Modes
Rev1 Bugs:
CLUT Chroma15 Mirrored over 16-255's Chroma
Counter runs backwards in DMA
Modulus applied 8 times at end of line
F7 Key not mapped
Rev 2:
PAL and NTSC
Better Timing
SDRAM Support
DMA and Blitter
Burst and Skip CPU Modes
Most Illegal Opcodes support
More Extended Video Modes
Extended 6510 control port
Rev 2 Bugs:
Black Pixels Every 4 in Blitter Transparent Mode
F7 Key not mapped
Rev 3:
Same features of Rev 2 with blitter bug fixed.
I've heard that there are multiple revisions of the Commodore 64 DTV ASIC. Could you explain the differences between them?
Sincerly,
Cob Grinder
Arkansas City, Kansas