HardLabs

8085-explorer

bazsimarkus·8085-explorer·schematic/8085-explorer.kicad_pcb

8085-explorer PCB layout, top view — open source board by bazsimarkus

About the 8085-explorer PCB

8085-explorer is an open source PCB design by bazsimarkus, published on GitHub. It is a 2-layer board measuring 120 × 80 mm, with 55 components from 38 distinct parts.

Other key parts include the 8085, 74LS573, 28C256, HM62256BLP and 74LS14. By type, the board carries 18 capacitors, 10 test points, 9 ICs, 6 resistors, 5 diodes and 4 connectors.

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

From the project

A Netronics Explorer/85 compatible Intel 8085 single board computer that runs the original Microsoft ROM BASIC v4.7, the original Netronics Explorer/85 monitor ROM, and a custom MicroPython interpreter written entirely in 8085 assembly.

A Netronics Explorer/85 compatible Intel 8085 single board computer that runs the original Microsoft ROM BASIC v4.7, the original Netronics Explorer/85 monitor ROM, and a custom MicroPython interpreter written entirely in 8085 assembly. Software compatible with the 1979 original, built from a minimal number of through-hole chips, and easy to assemble.

- Overview - Features - Getting Started - What You Need - Flashing the ROM - Connecting - Starting BASIC - MicroPython Interpreter - About - Running MicroPython - MicroPython Features - Building from Source - Examples - Microsoft BASIC Examples…

8085-explorer, from the project README
From the project README

Main components on the 8085-explorer

808574LS57328C256HM62256BLP74LS1474LS3274LS74MAX232L7805

8085-explorer bill of materials (BOM)

55 components, 38 distinct parts.

QtyPartRefs
1
8085
U1
1
74LS573
U2
1
28C256
U3
1
HM62256BLP
U4
1
74LS14
U5
1
74LS32
U6
1
74LS74
U7
1
MAX232
U8
1
L7805
U9
1
6.144 MHz
Y1
1
DC-005 Power Jack
J2
2
Conn_01x02_Pin
J4, J5
1
Conn_02x05_Odd_Even
J6
1
Button TACT 6x6mm
S1
1
Toggle Switch 7x7mm
S2
1
X1
TP1
1
X2
TP2
1
5V
TP3
1
GND
TP4
1
IO/~{M}
TP5
Show 18 more
QtyPartRefs
1
~{WR}
TP6
1
~{RD}
TP7
1
RESET_OUT
TP8
1
~{RAMEN}
TP9
1
~{ROMEN}
TP10
1
LED 5mm YELLOW
D1
1
LED 5mm GREEN
D2
2
1N4001
D3, D5
1
LED 5mm RED
D4
7
100nF
C1, C2, C3, C4, C5, C6, C7
1
22pF
C8
1
47uF
C9
5
1uF
C10, C11, C12, C13, C14
2
10uF
C15, C18
1
0.33uF
C16
1
0.1uF
C17
3
1k
R1, R2, R6
3
10k
R3, R4, R5

8085-explorer design files

The KiCad project lives in the bazsimarkus/8085-explorer repository on GitHub; these links point at the commit this page was built from.

8085-explorer: common questions

How big is the 8085-explorer PCB?

The 8085-explorer measures 120 × 80 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 8085-explorer?

55 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the 8085-explorer design files?

From the bazsimarkus/8085-explorer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the 8085-explorer design in my own project?

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

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