Posted: Mon Apr 30, 2012 12:18 am
tokra:
As Mike pointed out, you would need to solder a few wires.
Basic usage
To only expand the memory internally (basically an internal 3k expansion) that all are usable by the VIC chip, you need to solder 3 wires and make one cut.
This will also give you RAM at $8000 where the original character ROM is. 4 banks + the original ROM switchable through software.
Extended Color
If you want the extended colormemory, you need to add another 6 wires, and make one cut.
Extra features
If you add another wire you will also have an autostarting firmware that will give you a menu for setting everything up, and possibly some extensions to the BASIC to make use of the hardware modification (if there are room, not really sure yet). No sys needed to enable it. It is all started automatically during reset.
With this you will also have the possibility to add another 4k of RAM usable by the CPU (and possibly BASIC, but I need to check if there are some hardcoded limitations) at $8000.
As Mike pointed out, you would need to solder a few wires.
Basic usage
To only expand the memory internally (basically an internal 3k expansion) that all are usable by the VIC chip, you need to solder 3 wires and make one cut.
This will also give you RAM at $8000 where the original character ROM is. 4 banks + the original ROM switchable through software.
Extended Color
If you want the extended colormemory, you need to add another 6 wires, and make one cut.
Extra features
If you add another wire you will also have an autostarting firmware that will give you a menu for setting everything up, and possibly some extensions to the BASIC to make use of the hardware modification (if there are room, not really sure yet). No sys needed to enable it. It is all started automatically during reset.
With this you will also have the possibility to add another 4k of RAM usable by the CPU (and possibly BASIC, but I need to check if there are some hardcoded limitations) at $8000.