Rertocomputing

GS2HD - Apple IIgs RGB to HDTV Component Adapter

Submitted by GG on Tue, 11/24/2015 - 15:25

GS2HD D00The apple IIgs, like many computers from the 80's and early 90's, has a analog RGB output at a 15KHz horizontal frequency (same as NTSC/PAL). The majority of modern monitors and TVs will not sync to anything below 31.5KHz on their VGA input. If you have a TV with a SCART connector it is possible to wire the RGB directly to the TV. Most TVs in USA, however, use the YPbPr component instead of SCART making a direct connection not possible.

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Rertocomputing
Apple

T232-A01 - Simple DB9 RS232 monitor and breakout board

Submitted by GG on Thu, 05/28/2015 - 16:10

A new version of this project is available here

T232RS232 monitors are quite common but most of them use the standard good old DB25 connectors. Most of the RS232 ports in use today however use the DB9 connector. This forces the use chains of adapters to get the commercial monitor/breakout boards working. The GGLABS T232 solves the problem by providing native DB9 connections.

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Rertocomputing
MCU
Linux
Windows

GLINK-LT-A00 - User Port RS232 for Commodore 8-bit Computers

Submitted by GG on Sat, 04/18/2015 - 00:52

A new version of this project is available here

glink232GLINK-LT is a modern clone of the Commodore VIC-1011A RS232 User Port adapter for Commodore 8-bit computers. The adapter is fully supported by the standard Commodore BASIC at up to 2400 baud. Jumpers allow the card to be configured as a UP9600 for 9600 baud operation in Novaterm and Striketerm. A reset button is also provided for added convenience.

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Rertocomputing
C64

RAMGS-A01 - 4MB memory expansion for the Apple IIgs

Submitted by GG on Sun, 08/03/2014 - 22:37

ramgsThe apple IIgs is the most advanced computer in the Apple II series. Equipped with a 65c816 8/16-bit CPU with 24-bit address space it could address up to 16MB of memory. The original rom 01 model shipped with 256KB of fast RAM, the revised rom 3 shipped with 1MB (both had an additional 128KB of standard RAM and 64KB of sound RAM). RAMGS is a newly designed 4MB expansion card for this great classic computer.

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Rertocomputing
Apple

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