After reset, the computer doesn't differ from anĮven taking a look at the machine from outside doesn't reveal theĮxpansion, as Pekka needed the expansion port for his IEEE-488 The address space of an expanded machine really remains same for a It could easily have been about 20 FIM cheaper. I constructed my expansion in 1993 March, and it costedġ11 FIM. One American dollar (USD) is equivalent to five or six Finnish Oneself, the following memory expansion should have costed 300-400 Were some in the USA, but they were quite useless, as they had onlyĦ4 kB of memory, and the price was high as well. (Commodore's RAMĮxpansion Units came to our market in the year 1987.) Of course there In 1986, when the original article was written, there were noĬommercial memory extensions for sale in Finland. Then the worst slow-down, incredibly slow disk drive, can be workedĪround by using a part of the memory as a RAM disk. Meanwhile, there is one more program that supports the expansion: myĬommodore 64 becomes remarkably more efficient by adding memory to it. The banked concept is technically better than e.g. The expansion never became a success, although Two expanded by me, and the other two by Wolfgang Scherr and Matthias This expansion has been built, and of four Commodore 128s (of which Mixed, which caused the address block decoding to fail.īy now, I know of two Commodore 64 (mine and Pekka Pessi's) where Marko Mäkelä, with help from Pekka Pessi.Īugust 1996: Thanks to Wolfgang Scherr from Austria, who noticed my Six years later, it was translated to English and edited by
MikroBITTI, in its first two issues of the year 1987. The largest Nordic and Finnish home computer users' magazine at its time, * This document is based on Pekka Pessi's two articles published in CBM: Expansion - C64 to 256 kB 256 kB Memory expansion for the Commodore 64
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