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Z-Berry is the smallest Z80 based computer ever built.
Original Z80 CPU, modern memories and 74xxx discrete logic ICs.
Old-school computer design: no logic arrays, no special chips. Completely replicable.
DIY your own.
Features:
Z80 CPU running at 10MHz (20MHz possible)
32kB ROM
512kB RAM
microSD card storage
1 output full 8 bit-port
1 input full 8-bit port
3 independent input pins
4 independent output pins
serial interface
I2C bus
SPI bus
PS/2 keyboard connector
beeper
software driven LED
reset button
connector with almost full Z80 bus
5V powered via micro-USB connector
pluggable daughter board with real-time clock or OLED display
total 16 IC chips (12 on top side)
two layers PCB
credit card size (85x56mm)
fits Raspberry Pi 2 cases (but only a few of them fits perfectly)
firmware with SD card support
CP/M ready
More info on request.
Somebody likes it in assembler.
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