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Back to forum Reply to this topic Go to last reply Posted By Jay on 2002-04-19  C64 Expansion Devices Compatible with +4? Anyone know anything about the compatibility of the expansion port on the +4 and the C64? I'm just curious about things like the SuperCPU and the IDE Hard Drive interface that has recently been designed for the C64. I've been toying with a Database program for the +4, and a HD with faster disk access would really make something like that really useful! Just wondering... Jay Posted By JamesC on 2002-04-19  Plus/4 Expansion Port Most hard drives for the 64/128 plug into the CARTRIDGE port, at least here in the States.... and that's a 44 pin connector. The Plus/4 and 16 use a 50 pin cartridge connector. And although Commodore claimed when the Plus/4 came out that the USER port is the same as the 64, there are a couple of pins that have to be swapped if you want the Plus/4's ACIA to detect things correctly. (offhand I don't remember which pins these are, sorry) James C in NTSC-land Back to top Reply to this topic Copyright © Plus/4 World Team, 2001-2025. Support Plus/4 World on Patreon