Micro 8088 Case

Case for Micro 8088 and ISA 8-Bit Backplane Based Computer

Introduction

This case is intended to be used with Micro 8088 and ISA 8-Bit Backplane based computer.

The front panel features the standard Intel* 9-pin front panel pinout, and can work with other systems as well.

Hardware Documentation

3D Printed Parts

Parts can be printed using PETG or other fillament. The parts are designed to be printed without supports, with the exception of the case back, which needs supports for the DC power connector area.

Part	File	Notes
Case Front	case_front.stl	For the system name in colored letters, print sytem_name.stl first
Case Back	case_back.stl
Case Bottom	case_bottom.stl	Use supports on the build plate only option when printing
Case Top	case_top.stl	It is possible to use a 192.8 mm * 192.8 mm piece of transparent 1/8" / 3 mm acrylic plastic instead
Case Left	case_left.stl
Case Right	case_right.stl
ISA Slots Cover	slots_cover.stl	Snaps into the Case Back
Speaker Bracket	speaker_bracket.stl
System Name	system_name.stl	System Name "Micro 8088". Print and remove the rectangle on the perimeter. Next print case_front.stl
Keycaps	keycap_6mm_round.stl	Print two using colorful plastic. It is recommended to print several keycaps at the time. Omron B32-2000 keycaps can be used instead

Other Parts

Part	Quantity	Notes
M3 x 8 mm flat head screws	16	Hold case sides together
M3 x 1.8 mm square nuts	16	Hold case sides together
M3 x 8 mm pan head screws	6	Floppy drive
M3 x 6 mm pan head screws	15	Backplane - 6 screws, front panel - 2 screws, ISA cards - 7 screws

Front Panel Schematic and PCB Layout

Schematic - Version 1.0

PCB Layout - Version 1.0

Jumpers, Connectors, and Switches

J1 - Front Panel Connector

Pin	Description	Pin	Description
1	HDD Activity LED Anode (+)	2	Power LED Anode (+)
3	HDD Activity LED Cathode (-)	4	Power LED Cathode (-)
5	Reset Switch (Ground)	6	Power Switch (Output)
7	Reset Switch (Output)	8	Power Switch (Ground)
9	5V (Unused)	10	Key (Pin removed)

SW1 - Power Switch

Press SW1 to turn on/off the system

SW2 - Reset Switch

Press SW2 to reset the system

Front Panel Bill of Material

Micro 8088 Front Panel project on Mouser.com - View and order all components except of the PCB. Micro 8088 Front Panel project on OSH Park - View and order the PCB.

Component type	Reference	Description	Quantity	Possible sources and notes
PCB		Micro 8080 Front Panel PCB V1.0	1	OSH Park Micro 8088 Front Panel V1.0 Alternatively order from a PCB manufacturer of your choice using provided KiCad files
LED	D1	3 mm, blue LED indicator	1	Mouser 604-WP710A10QBC/D Alternatively use 3 mm green LED Note: Intel* specifies a bi-color green/yellow LED
LED	D2	3 mm, pink LED indicator	1	Mouser 604-WP7104VRVCWA Alternatively use 3 mm yellow LED
Tactile Button	SW1, SW2	6 mm tactile button, projected	2	Mouser 653-B3F-1052, 653-B3F-1050
Key Cap	SW1, SW2	Omron 6 mm round keycap, black	2	Mouser 653-B32-2000. Or use 3D printed keycaps
Pin Header	J1	2x5 pin header, 2.54 mm pitch	1	Mouser 855-M20-9980545
Speaker		36 mm x 4.6 mm, 8 ohm, 1 W	1	Mouser 665-AS03608MRLW100R

Front Panel Cables Bill of Material

Component type	Reference	Description	Quantity	Possible sources and notes
Connector	J1	2x5 pin wire housing, 2.54 mm pitch	1	Front panel connector. Mouser 855-M20-1070500
Connector		4 pin wire housing, 2.54 mm pitch	2	Speaker connector. Power switch and Power LED connector for the ISA 8-bit backplane. Mouser 855-M20-1060400
Connector		2 pin wire housing, 2.54 mm pitch	2	Reset switch connector. HDD LED connector. Mouser 855-M20-1060200
Contact		Female crimp contact	20	All connectors. Mouser 855-M20-1160042, 855-M20-1180042
Wire		22 AWG - 26 AWG stranded wire, white	60 cm or 2'	Negative wires for LEDs and switches
Wire		22 AWG - 26 AWG stranded wire, black	10 cm or 1/3'	Negative wire for the speaker
Wire		22 AWG - 26 AWG stranded wire, red	30 cm or 1'	Positive wire for the speaker and the HDD LED
Wire		22 AWG - 26 AWG stranded wire, green	10 cm or 1/3'	Positive wire for the Power LED
Wire		22 AWG - 26 AWG stranded wire, blue	30 cm or 1'	Positive wire for the Reset switch
Wire		22 AWG - 26 AWG stranded wire, yellow	10 cm or 1/3'	Positive wire for the Power switch