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Z80-MIO

dennis9819·Z8C-Homebrew-Computer·.old/Schematics/Z80-MIO/Z80-MIO.kicad_pcb

Z80-MIO PCB layout, top view — open source board by dennis9819

About the Z80-MIO PCB

Z80-MIO is an open source PCB design by dennis9819, published on GitHub. It is a 2-layer board measuring 160 × 100.3 mm, with 75 components from 31 distinct parts.

Other key parts include the 74HC688, GAL16V8, 74HC245, PIO-DIP-40 and 74LS06. By type, the board carries 21 resistors, 16 capacitors, 13 diodes, 12 ICs, 9 connectors and 1 transistor.

It belongs with the retro computing and usb & debug tools designs in this gallery.

From the project

To easily develop for my Z80 homebrew system, I designed a simple assempler development environment. This packs the following tasks into one script: zmac assembly object file creation (for xmodem upload) monitor file creation (creates monitor commands for ascii upload) symbol tab

To easily develop for my Z80 homebrew system, I designed a simple assempler development environment. This packs the following tasks into one script: zmac assembly object file creation (for xmodem upload) monitor file creation (creates monitor commands for ascii upload) symbol table include file generation * eeprom programming for the minipro

./build.sh dir`: Path to the location of the asm file

Main components on the Z80-MIO

74HC688GAL16V874HC245PIO-DIP-4074LS06PCF85848048DS1307+74HC161Am9511A

Z80-MIO bill of materials (BOM)

75 components, 31 distinct parts.

QtyPartRefs
1
74HC688
U1
1
GAL16V8
U2
3
74HC245
U3, U4, U5
1
PIO-DIP-40
U6
1
74LS06
U7
1
PCF8584
U8
1
8048
U9
1
DS1307+
U10
1
74HC161
U11
1
Am9511A
U12
1
BC548
Q1
1
32.768 kHz
Y1
1
Conn_02x05_Odd_Even
J1
1
Conn_02x32_Row_Letter_First
J2
1
Conn_02x02_Top_Bottom
J3
1
Conn_02x06_Odd_Even
J4
2
Mini-DIN-6
J5, J6
1
Jumper_2_Bridged
J7
2
Conn_02x04_Odd_Even
J8, J9
1
3V
BT1
Show 11 more
QtyPartRefs
1
Speaker
LS1
9
5.1V
D1, D2, D3, D4, D5, D6, D7, D8 +1
4
D
D9, D10, D11, D12
4
47pF
C1, C2, C3, C4
12
100nF
C5, C6, C7, C8, C9, C10, C11, C12 +4
6
4k7
R1, R14, R15, R16, R17, R19
3
10k
R2, R18, R20
1
220
R3
8
68
R4, R5, R6, R7, R10, R11, R12, R13
2
R
R8, R9
1
R_Network08
RN1

Z80-MIO design files

The KiCad project lives in the dennis9819/Z8C-Homebrew-Computer repository on GitHub; these links point at the commit this page was built from.

Z80-MIO: common questions

How big is the Z80-MIO PCB?

The Z80-MIO measures 160 × 100.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Z80-MIO?

75 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the Z80-MIO design files?

From the dennis9819/Z8C-Homebrew-Computer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Z80-MIO design in my own project?

The repository has no license, so all rights stay with dennis9819. Use it as a reference, and ask the author before reusing the design.

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