Coking Plant, Zeche Zollverein, Essen

Retro

Restauring an old iRiver iHP-120, Part 1

In a time before smartphones, people used so called "digital music players" for portable music. One of them was the iRiver iHP-100 series, which came to the market in October 2003.

R Tape loading error, Part 2

Find out what's stored on #ZXSpectrum tapes, in this second part.

R Tape loading error

Have you ever wondered how 1980's computers like #ZXSpectrum stored data on tape? Read here how...

Z80 Disassembler

How to write a Z80 disassembler in one afternoon...

Reviving a Sony CDP-991, Part 5

The player is playing again. Time for some final cleanings.

Reviving a Sony CDP-991, Part 4

The CD player finally plays music again, but still has trouble with the higher tracks.

Reviving a Sony CDP-991, Part 3

In the last part, I made the tray operational. It's a precondition for this part: Inserting a CD.

Reviving a Sony CDP-991, Part 2

In the first part, I powered up my CDP-991 again after 15 years. Next step: Open the tray.

Reviving a Sony CDP-991

Let's do a hardware related project for a change. A few days ago, I found my good old CD player from the time when I was in my early twenties. It's a CDP-991. Sony has produced them around 1991.

Recovering old ZX Spectrum tapes, Part 2

The ZX Spectrum was a comparable cheap home computer, and thus the tape loading and saving mechanisms have not been very sophisticated.

Recovering old ZX Spectrum tapes

Since I am in the mood of heavy ZX Spectrum retro action, I dug out all my old computer tapes in an attept to digitize and convert them. It turned out to be more difficult than I thought...

Optimizations

On a slow processor like the Z80, it is essential to think about execution time. Often a clean approach is too slow, and you need to optimize the code to make it a lot faster.

ZX Spectrum retro game programming

If you are a child of the 1980’s, you maybe remember the Sinclair ZX Spectrum.