HardLabs

MZ80K SD

yanataka60·MZ80K_SD·KiCad/MZ80k_SD/MZ80k_SD.kicad_pcb

MZ80K SD PCB layout, top view — open source AVR/Arduino board by yanataka60

About the MZ80K SD PCB

MZ80K SD is an open source AVR/Arduino PCB design by yanataka60, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 100 mm, with 21 components from 16 distinct parts.

Its main chip is the Arduino_Pro_Mini_5V, from the AVR/Arduino family. Other key parts include the 74LS04, 2764, 8255 and 74LS30. By type, the board carries 6 ICs, 6 capacitors, 5 connectors, 3 switches and 1 resistor.

From the project

MZ-80KシリーズでSD-CARDからのアプリケーション起動、BASICなどのアプリケーションからSD-CARDへのロード、セーブを実現するものです

ROMをF000Hに置くことでMZ-80シリーズにフロッピーディスク装置を外付けした際に起動するためのFDコマンドを利用できますが、フロッピーディスク装置の代わりにSD-CARDを繋いでしまおうというものです。

アダプタを繋ぐだけでもBASIC SP-5030が約4秒で起動できるようになるなどアプリケーションランチャーとして便利に使えますが、MONITOR SP-1002にパッチをあてることでBASIC SP-5030はもちろん、ほとんどのMZ-80KアプリケーションがSD-CARD対応となります。

MZ-700もMZ-80K用アプリケーションについては同様にSD-CARD対応となりますが、標準添付のS-BASIC、Hu-BASICともMONITOR 1Z-009A、1Z-009BのCMTルーチンを利用していないためMONITOR 1Z-009A、1Z-009BにパッチをあてただけではSD-CARD対応となりません。

MZ80K SD, from the project README
From the project README

Main components on the MZ80K SD

74LS0427648255Arduino_Pro_Mini_5V74LS30

MZ80K SD bill of materials (BOM)

21 components, 16 distinct parts.

QtyPartRefs
1
74LS04
U1
1
2764
U2
1
8255
U3
1
Arduino_Pro_Mini_5V
U4
2
74LS30
U5, U6
1
MZ-80K BUS
J1
1
Micro_SD_Card_Kit
J2
1
INT VCC
J3
1
EXT 5V
J4
1
MicroSD Card Adapter
J5
1
INT/EXT
S1
1
SD/CMT
S2
1
80K/700
S3
5
0.1uF
C1, C2, C3, C4, C5
1
100uF
C6
1
10k
R1

MZ80K SD design files

The KiCad project lives in the yanataka60/MZ80K_SD repository on GitHub; these links point at the commit this page was built from.

MZ80K SD: common questions

What microcontroller does the MZ80K SD use?

The MZ80K SD is built around the Arduino_Pro_Mini_5V, from the AVR/Arduino family.

How big is the MZ80K SD PCB?

The MZ80K SD measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MZ80K SD?

21 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the MZ80K SD design files?

From the yanataka60/MZ80K_SD repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the MZ80K SD design in my own project?

Yes, under the terms of its MIT license, which yanataka60 chose for the repository.

Can I test firmware for the MZ80K SD without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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