Cold War Computing

Retrocomputing Blog

Retrocomputing

1802 RetroShield – SPI RAM

In the original 1802 Monitor + Tiny Basic Arduino code by Erturk Kocalar, the memory map is divided into three sections: ROM, onboard RAM, and external/simulated RAM. ROM is hardcoded in the Arduino's program memory, is of variable length, and...

1802 RetroShield

After receiving this Hackerbox, I was very intrigued by the idea of exploring vintage 8-bit CPUs via an Arduino Mega, and with WiFi no less. It turns out that 8bitforce has designed RetroShields for a variety of 8-bit microprocessors, including the...

November 2021 Timex/Sinclair Online User Group Meeting

The Timex/Sinclair Online User Group met online for a couple of hours on Monday, November 21, 2021 and got to know each other a little bit as well as find out some of what's going on in the modern Timex/Sinclair universe. The Timex/Sinclair Online...

PDP8 Timing Generator