super-reu -- an advanced FPGA-based ram expansion module for C64/C128
Features
The extensions that super-reu offer over a regular 1700/1750 REU are:
- Larger storage capacity (up to 16 mibioctets)
- Paced DMA transfers
- Multiple DMA channels
- External data generators/consumers
See also:
Movie player demonstrator
An example application demonstrating the capabilities of the super-reu in the form of a full screen movie player is included in the repository. The application can stream full screen bitmapped video (320x200 in hires or 160x200 in multicolor) at 50 fps and sampled sound at 16 kHz from an sdcard.
Chameleon v2 top level design
While the DMA engine and MMC64 modules are not tied to any specific FPGA solution, this repository contains a top level design integrating the modules onto the Chameleon v2 hardware. Although the super-reu does not depend on any address decoder PLA tricks, and thus should work fine in a C128, note that the default core of the Chameleon v2 does use such tricks and thus it is not safe to use it in a C128.
The Chameleon v2 top level design does not support the VGA port or 3.5mm stereo-audio plug on the Chameleon. Please use the DIN video connector or RF output on the C64 for audio and video connection.
Prerequisites
To build the movie player demonstrator for Chameleon v2, the following is needed:
Building and installing
To build the movie player demonstrator and m64conv tool, run
make QUARTUS_SH=/path/to/quartus_sh
specifying the correct path to quartus_sh in your Quartus installation
(default is /opt/intelFPGA_lite/18.0/quartus/bin/quartus_sh).
ca65 and ld65 need to be present in the executable path.
If everything goes well, the core and ROM can be flashed on Chameleon v2 using
make SLOT=n flash
If no SLOT is specified, slot 2 will be used. chacocmd must be
present in the executable path.