retro-computers

Adapter to connect a PS/2 mouse to a serial port

 ps/2 to serial

If you still have an old computer, the problem is to connect to it modern mouse may be familiar to you. Old mechanical mouse, sooner or later come into disrepair - cable wear, buttons do not work, etc. In general, modern laser mouse is usually much nicer than the devices of the last century

Because the serial mouses are no longer produced, then the for PC without a PS/2 port is still two options: adapt the PS/2 or USB mouse. With PS/2 mouse everything is much easier - this protocol can be implemented in almost any microcontroller, such as ATMega8.

The adapter is built on ATMega8 microcontroller and uses MAX232 to match the TTL signal levels with a serial port levels. The microcontroller receives data from the PS/2 mouse and transmits them via the UART.

Tape player and recorder for Sinclair ZX Spectrum on Atmega128

ZX tape simulator for zx spectrum

ZX Spectrum - a computer designed over 30 years ago with a 3.5 MHz processor and only 48 KB of RAM. For him, it developed a huge number of software and games. Moreover, new game releases are constantly in our days.

Previously, the program is loaded from the tape. And the loading is not always succeeds, sometimes the game had to try several times to load often getting message "R Tape loading error".

Alternatively audiotapes today suggests a memory card that stores the program files in the formats TAP, WAV and TZX. And as an alternative to tape recorder - microcontroller device that can play and store these files.

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