• MixSID 1.0 released

    I’m proud to anounce the first official release of MixSID, a new stereo SID board for the C64.

    The MixSID can be used with any combination of SID models on a wide range of C64 mainboards.

    Features include an integrated stereo channel mixer, pragmatic stereo addressing scheme, flexible handling of io areas, onboard audio input, output and digiboost circuits, dedicated stereo output, full paddle compatibility and versatile digital control.

    Documentation is available in both english and german.

  • reprom64 1.2 released

    This is just a maintenance release reflecting minor last minute changes to board revision 2 before production. The board revision was not bumped since there are no such boards yet.

    Please see the project page for more information.

  • keyman64 1.2 released

    This release features a new board revision and also introduces new functionality.

    The 7660 used for negative voltage suppy has turned out not to be required at all and has thus been removed from the board.

    Instead, a PLCC28 socket has been added to allow using either DIP or PLCC versions of the crosspoint switch IC.

    Two new commands have been added to save the current state of the control lines into eeprom and to restore a previously saved state later. See the save and restore commands.

    In addition, the configuration utility has gained a --preserve option to preserve a previously saved state when creating a new binary configuration. See Preserving saved state when updating the configuration.

    In addition, key specifications can now contain an execution policy that allows different commands or command sequences to be run every other time the key is pressed. Thus a single key can serve as a toggle switch. See Commands and bindings.

    Both features have been suggested by Thomas “GMP” Müller.

    Please refer to the project page for detailed documentation.

  • reprom64 1.1 released

    This release adds support for ancient board types (KU, HB) as well as for the SX64 CPU board. More pin headers have been added to adjust to the differences in position and spacing between ROM ICs, resulting in four different assembly options.

    A simple Makefile has been added in the ./image directory to help with the assembly of eprom images.

    Please see the project page for more information.

  • reprom64 1.0 released

    Reprom64 prototype assembled for 250469

    Reprom64 is a rom replacement board for the C64. It replaces all of the C64 rom chips with a single 64kb Eprom offering space for up to 4 Kernals, 4 Charsets and 2 Basic roms. The board can be assembled for use on either old or new mainboard layouts.

    Please see the project page for more information.

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