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MGH8060
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README.md

MGH8060

SC/MP INS8060-based microcomputer running National Industrial Basic Language (NIBL)

Here is an overview of the device:

MGH8060_overview

And here is my assembled unit - hardware v1.2

Assembled_unit_v1.2

Bill of Materials

Component type Reference Description Quantity
PCB Order from PCBWay 1
Integrated Circuit U1 MAX232(A) - RS232 Driver, 16 pin DIP 1
Integrated Circuit U2 INS8060 - SC/MP II Microcontroller, 40 pin DIP 1
Integrated Circuit U3 HM62256B - 32kb SRAM, 28 pin DIP 1
Integrated Circuit U4 74LS573 - high-speed octal latch, 20 pin DIP 1
Integrated Circuit U5 8255A - Programmable Peripheral Interface, 40 pin DIP 1
Integrated Circuit U6 27C512 - 64kb EPROM, 28 pin DIP 1
Integrated Circuit U7 74LS138 - 3-to-8 line decoder, 16 pin DIP 1
Integrated Circuit U8 74LS21 - Dual 4 -Input AND Logic, 14 pin DIP 1
Integrated Circuit U8 74LS04 - HEX Inverter, 14 pin DIP 1
LED D1 LED indicator, 3 mm 1
LED D2 LED indicator, 3 mm 1
Diode D3 1N4002, general-purpose diode 1
Pin Header J1 2x17 header female, 2.54 mm pitch 1
Connector J2 Screw terminal 1
Connector J3 DB9 male 1
Pin Header J4 1x6 pin header, 2.54 mm pitch, angle 1
Pin Header J5 2x25 header female, 2.54 mm pitch 1
Pin Header J6 1x6 pin header, 2.54 mm pitch 1
Pin Header JP1 1x2 pin header, 2.54 mm pitch 1
Pin Header JP2-JP4 1x3 pin header, 2.54 mm pitch 3
Capacitor C8-C15 1 uF, 16V, electrolytic, 2.54 mm pitch 5
Capacitor C6 27pF, ceramic, 2.54 mm pitch 1
Capacitor C8-C15 0.1 uF, 50V, MLCC, 5 mm pitch 8
Capacitor C7,C20 22uF, 6.8V, electrolytic, 2.54 mm pitch 2
Resistor R1 160 kohm, 0.125 W, axial 1
Resistor R2-R4,R8 1 kohm, 0.125 W, axial 4
Resistor R5 10k kohm, 0.125 W, axial 1
Resistor R9 4.7k kohm, 0.125 W, axial 1
Crystal X1 4MHz, short 3.5mm heigh max 1
IC Socket U8,U9 14 pin DIP 2
IC Socket U1,U7 16 pin DIP 2
IC Socket U4 20 pin DIP 1
IC Socket U3,U6 28 pin DIP 2
IC Socket U2,U5 40 pin DIP 2

Memory Map

Start End RAM ROM I/O
0x0000 0x1FFF X
0x2000 0x3FFF X
0x4000 0x5FFF X
0x6000 0x7FFF X
0x8000 0x9FFF X
0xA000 0xBFFF X
0xC000 0xDFFF X
0xE000 0xFFFF X
Address 8255 Function
0xA000 Port A
0xA001 Port B
0xA002 Port C
0xA003 Ctrl Register

Schematic

Schematic - Version 1.2

Credits

  • The device is based on the work of Ronald Dekker

  • Early versions of my design were reviewed by Phil(aka Retro Phil) who offered a lot of helpful suggestions, he also contributed all the firmware for MGH8060

Release Notes

I used HCT parts for most of the ICs. Power usage was about 60mA

I used Winbond W27C512 (EEPROM pin compatible with EPROMs)

Please consider getting the PCB from my sponsor PCBWay

PCBWay

If you found this helpful and you like the work I do, why not buy me a coffee, thanks! :)

ko-fi

Changes

  • Version 1.2:

    • Fixed missing connections.

  • Version 1.1:

    • Corrected CE signals (thanks Phil)

  • Version 1.0

    • Initial version

License

Copyright 2024 Kris Sekula

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) .

Trademarks

  • Other names and brands may be claimed as the property of others.