Diagnostic Cartridge
-
Four 16K ROMs on one 27C512, picked with a DIP switch: building the ZX External ROM board and testing ZX Diagnostics, DiagROM and more on a 48K Spectrum.
-
A gifted Atari 130XE shows nothing at power on. A thermal camera finds RAM running hot enough to boil water, but replacing it wasn’t the end of the story.
-
Part three of the Toastrack series: the Z80 reset pin had no rise time, and the cause was a tiny trace lifted during the recap. One wire later, it lives again.
-
An Atari 800 with a missing key gets expanded to 48K, RAM tested with a Super Salt diagnostic cartridge and a 3D printed temporary keycap. Then the original key turns up in the box.
-
A three part build that replicates the classic Atari Super Salt diagnostic cartridge: soldering, EPROM programming and testing an Atari 65XE.