Prototype SNES / PC Amplifier

posted in: Audio Projects | 0

This was a 2-Watt/channel audio amplifier designed for Super Nintendo or computer sound cards. This prototype used an integrated amp IC, volume control, power switch, power light, etc. The power supply was a surplus wall transformer, rated 15VDC @ 1000mA. This unit is still in use today by an old friend in NY. This project was a good example of what could be built using some spare parts found in my myriad of parts cabinets and drawers. Read More

Z80 Control Board

posted in: Z80 Projects | 0

Through the late 80s and early 90s the Zilog Z80 was my favorite CPU to work with. I loved the architecture, instruction set, capabilities and vast array of support chips available. I started designing commercial Z80 boards around 1992 and the early designs were built on perf-board and wire-wrapped. This article discusses a couple of early boards I made, the design, the development tools I used and even some example code. Read More

QuickBASIC Applications

posted in: PC Applications | 0

A collection of applications I wrote in both QuickBASIC 4.5 and PDS 7.0 that ran on a DOS PC with CGA/EGA/VGA graphics. These applications are very old and do not run on modern 64-bit architecture. You made need to use a special emulator to run them, unless you have an old DOS-based PC. You can click the title of each application to download it as a ZIP archive. Read More

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