ZZ80MB Rev0, A Z280-based Motherboard with RC2014 Expansion (Obsolete)

Please note, this is rev0 of ZZ80MB, it is superceded by ZZ80MB rev3.

ZZ80MB is a Z280-based motherboard with RC2014 expansion slots. It is based on the ZZ80RC-CF design, but with additional expansion slots added.

• Z280 CPU configured to Z80-compatible mode running at 24MHz with selectable bus speed of 12 MHzor 6 MHz
• 1/2 megbyte of non-volatile RAM
• RAM-only system, programs are loaded into the non-volatile RAM in UART-bootstrap mode.
• CP/M 2.2 and CP/M 3 ready.
• CF interface supports 4 CF drives
• 3 RC2014 expansion slots
• One internal UART at 115200 baud, odd parity, no handshake
• bootstrap to ZZ80Mon, a simple monitor
• A standalone single-board computer with I/O expansion bus compatible with RC2014 I/O bus

Schematic

Gerber photoplots

Bill of Materials

ZZ80Mon, a simple monitor for ZZ80MB

CP/M2.2 BIOS/BDOS/CCP