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==== Table of Contents ====

[[#build_a_powerful_z80_computer_in_four_stages|Build a Powerful Z80 Computer in Four Stages]]

[[#introduction|Introduction]]

[[#stage_1|Stage 1]]

[[#stage_2|Stage 2]]

[[#stage_3|Stage 3]]

[[#stage_4|Stage 4]]

====== Build a Powerful Z80 Computer in Four Stages ======

===== Introduction =====

This[[https://hackaday.io/project/163786-building-a-22mhz-z80-computer-in-4-stages/log/159205-introduction-to-z80sbc64|instructio]]n takes a simple Z80 design and build it in stages into a high performance, sophisticated Z80-based system. The Z80 computer is functional in each stage, more functionalities are added in each subsequent stages. The goal is a high-performance, expandable, CP/M capable Z80 system. This Z80 SBC is based on Z80SBC64.

===== Stage 1 =====

Bill of materials

[[https://hackaday.io/project/163786-building-a-22mhz-z80-computer-in-4-stages/log/159250-stage-1-hardware-building-a-minimal-z80-computer|A minimally functioning Z80]].

Features at Stage 1

22MHz Z80

128K RAM

Serial bootstrap

Pictorial stage 1 assembly guide.

[[https://hackaday.io/project/163786-building-a-22mhz-z80-computer-in-4-stages/log/159464-z80sbc64-theory-of-operation|Theory of operation]]

[[https://hackaday.io/project/163786-building-a-22mhz-z80-computer-in-4-stages/log/159508-running-software-on-the-minimal-z80sbc64|Software for Stage 1 Z80 SBC]]

===== Stage 2 =====

Features at Stage 2

22MHz Z80

128K RAM

Serial bootstrap

Back-up battery for RAM and protected RAM area for bootstrap code

Pictorial stage 2 assembly guide

Software for Stage 2 Z80 SBC

===== Stage 3 =====

Features at Stage 3

22MHz Z80

128K RAM

Serial bootstrap

Compact flash interface and CP/M

Pictorial stage 3 assembly guide

Software for Stage 3 Z80 SBC

===== Stage 4 =====

Features at Stage 4

22MHz Z80

128K RAM

Serial bootstrap

RC2014 Expansion bus

Solderless breadboard experiments

Pictorial stage 4 assembly guide

Software for Stage 4 Z80 SBC