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Posted By

JamesC
on 2014-08-22
09:33:39
 Re: Replacement of 3 in 1 software

Craftsman: the internal function software is hardcoded to reside at $8000, which is the lower ROM bank. Adding a ROM to an upper bank only will require at least one other ROM be changed as well, and would be supplied by whomever supplies the upper bank ROM.

The F1 key function (swap in the built-in software) is almost identical to the additional function ROM slot on the 128, other than the Plus/4 has 2x 16kb sockets rather than the 128's 1x 32kb socket. wink

Though the Plus/4 (and in theory the 128) can have additional ROM software through the cartridge port, and it appear on F2. This is how Script/Plus, Calc/Plus, and LOGO were released.... 3+1 would still be on F1, the other ROMs on F2.



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