It occurred to me that there's no online reference for which C64 add-ons use which I/O spaces. Therefore I am going to start one. Please send details of any hardware add-ons you are familiar with, whether by Commodore or third parties, either to the list to to me personally. Include which of the I/O lines they use and if possible, which addresses within that space the software uses. If you *really* know the hardware, you might be able to say what the decoding circuitry inside the box does. For example, the SFX Sound Expander uses a different set of addresses within DFxx for reads compared with writes, and there are certain areas that should not be read from at all due to bus contention issues. Devices I need details for include: REUs CP/M cartridge Magic Voice Freezer cartridges SID cartridges MIDI cartridges That modem ;) CMD stuff (maybe) 'Large' game cartridges (that use an octal latch for A20 - A13) RS232 cartridges Anything else? I'll produce a sample document detailing the Sound Expander if anyone's unsure of what I mean. Richard - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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