Difference between revisions of "6 MHz CPC"
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Revision as of 11:52, 19 December 2010
The 6 MHz CPC is a DIY hardware modification which allows to run the CPC6128 with a CPU speed of 6 MHz instead of the usual 4 MHz.
Contents
Technic
The 16 MHz crystal of the CPC is replaced by a 24 MHz crystal. Both crystals should kept on the main board, but a switch (2 lines at least, better 3) selects between them. You have to select the CPU and bus speed before you switch on the CPC. Switching the speed while the system is switched on is not advised. None of the authors of this article is responsible for danger on your CPC, in case you try to use this DIY.
Advantages
- Z80 runs with 6 MHz
- Bus runs with 6 MHz
- FDC is 50% faster
- Disc formats with 50% more sectors can be used
- Sound is better, since PSG runs more quick
- Games run more fluid
Disadvantages
- Not every hardware expansion is able to work with the 6 MHz bus speed
- FDC can't read old disc formats any longer
- Sound must be reprogrammed
Software
- A lot of games run well with 6 MHz. For example: Nebulus, StarFox, Starstrike and others.
- There is a 6 MHz version of FutureOS
