ZVT (Zavody automatizace a vypocetni techniky) PP-01 The ZVT SMEP PP-01 is an 8-bit microcomputer developed in the 1980s in Slovakia by the Research Institute of Computer Science (VÚVT). The technical specs are as follow: - 8080 microprocessor - 64K RAM and 16K ROM - 256x256 pixels display in 8 colors Uses 3 bit-planes for graphics. According to Jan Ciger there was also PP-03 (same as PP-01, but with color support) and PP-06 (basicaly an IBM PC clone, with 4MHz 8086 CPU) Hynek Med added that "the PP-06 was a PC-XT clone with two 360k floppies (sometimes 20 MB MFM disk). I uses VUVT-DOS (a translation of MS-DOS), and an expantions bus which wasn't compatible with ISA." The PP 01 keyboard is located on a separate SM 2257 board. In addition to the keyboard circuits, it also contains the interrupt request LED and RUN LED, sound output (acoustic transducer - speaker) and circuits for the INT0 and INT3 interrupt buttons.