/* Imported from Wayback Machine
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   Snapshot date: 2024-12-08
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*/

==== Table of Contents ====

[[#zz80mb_rev0_a_z280-based_motherboard_with_rc2014_expansion_obsolete|ZZ80MB Rev0, A Z280-based Motherboard with RC2014 Expansion (Obsolete)]]

[[#introduction|Introduction]]

[[#features|Features]]

[[#design_information|Design Information]]

[[#software|Software]]

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

===== Introduction =====

**Please note, this is rev0 of ZZ80MB, it is superceded by [[builderpages:plasmo:zz80mb:zz80mbr3|ZZ80MB rev3]].**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.

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=2dadd4&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/zz80mb/dsc_50871107.jpg|{{https://retrobrewcomputers.org/lib/exe/fetch.php?w=600&h=421&tok=7e34c6&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fzz80mb%2Fdsc_50871107.jpg?600x421|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_zz80mb_dsc_50871107.jpg}}]]

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=b375b3&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/zz80mb/dsc_50881107.jpg|{{https://retrobrewcomputers.org/lib/exe/fetch.php?w=600&h=382&tok=8b9314&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fzz80mb%2Fdsc_50881107.jpg?600x382|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_zz80mb_dsc_50881107.jpg}}]]

===== Features =====

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

===== Design Information =====

[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zz80mb:zz80mb_r0_scm.pdf|Schematic]]

[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zz80mb:zz80mb_r0.zip|Gerber photoplots]]

Bill of Materials

==== Software ====

ZZ80Mon, a simple monitor for ZZ80MB

CP/M2.2 BIOS/BDOS/CCP