Several months ago I had won an auction for a ZX Spectrum 128 +2B of an unknown state and no big surprise the machine was not working properly. This is what I saw after booting up the machine
Black screen with a white border
On August 5th, 2018 Uwe Geiken posted a programming excercise in the Facebook group ‘BASIC on the ZX Spectrum’. The challenge had to do with something called the “Kaprekar’s Constant”. I had never heard of it before this post appeared in the group. Never too old to learn something new…
The post linked to a Wikipedia article about the Kaprekar’s Constant. The article lists the following properties for the constant (6174);
After posting the last article on refurbishing the ZX Spectrum I got a tip from Alex (a.k.a. ZX Wife) via Twitter on what I could try to resolve the issue with the keyboard as soon as the case was completely screwed down. Together with Ian she forms the team behind Mutant Caterpillar.
https://twitter.com/zx_wife/status/1010155645386022914
Xcode tip - Using behaviors to improve debugging
All the parts required to finish refurbishing the ZX Spectrum 48K (upgraded from a 16K model) have been delivered, so time to start working on the unit again.
To complete this unit I will be performing the following tasks
