The SIDstick is a pocket-sized chiptunes player. Chiptunes are songs written to be synthesized in real-time. A lot of chiptunes are ripped from classic videogames, and some are new works. The SIDstick plays the most common variety of chiptunes, music written for playback on a SID chip. Main features:

• Removable Storage supporting microSD cards, 1 card can hold 20,000 songs.
• 20+ hour battery life.
• Super Hi-Quality hardware-based playback at 31kHz sample rate, >16 bit resolution.
• Completely Open, hardware and software are available under the MIT license.
• Upgradable with connections on the board.

source: gadgetgangster.com wikipedia hvsc.c64.org

This site is about recreating gaming hardware from the past in modern programmable devices, known as FPGAs.

source: fpgaarcade.com

The PLA chip (906114-01) used in the Commodore C64 is a generic 82S100 gate array with custom programming. Its logic functions were dumped and reverse engineered by the community and are available from a variety of sources. They’re reused for this particular PLA replacement in the FPGA Arcade 28 pin DIL CPLD board.

Two approaches exist to build such a PLA replacement:

1. Implementation based on a truth table with 216 entries, each entry consiting of 8 bits and programmed into an EPROM chip.
2. Reverse engineered logic equations programmed into a PLD.

Both approaches result in the same logic functionality when implemented in a CPLD. Since equations are more common for CPLDs, I chose this implementation style for the final design. However, there’s a variant for the truth table available which has been verified in simulation but not in real C64 hardware. Following are descriptions for both of them.

We have run simulations proving that the equations perfectly match the truth table, so both compiled outputs are effectively identical in the C64 implementation discussed here.

source: fpgaarcade.com

Dtv2ser is a small hardware device that bridges TLR’s dtvtrans protocol used to communicate with a DTV via a RS232 interface to your Mac or PC.

By using a serial-to-USB adapter the dtv2ser provides dtvtrans access for all modern PCs where the original dtvtrans parallel cable cannot be used.

The new dtv2ser+usb board directly integrates the USB adapter and realizes the full dtv2ser functionality on a USB-stick-like device.

source: lallafa.de