Alexiev

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Description

Minimal 8085 Single Board Computer - MiniMax8085 by Sergey Kiselev

The MiniMax8085 is based on the Intel 8085A CPU (U1). The 74*573 octal latch (U6) is used to demultiplex the lower 8-bit of address and data bus.

The board uses the Intel 8251A USART (U2) for serial input / output, for example for connecting a console. The MAX232A RS-232 driver/receiver (U7) is used to convert TTL logic levels to RS-232 voltage.

The 62256 32 KiB SRAM (U4) is used for the system RAM. The RAM is battery backed using the DS1210 NVRAM controller (U8).

The board supports a variety of ROM options (U3): The 28C256 EEPROM; UV EPROMs, such as 27C256 (32 KiB), 27C128 (16 KiB), and 27C64 (8 KiB); or The 29C256 Flash ROM ICs.

Please refer to the Project page , which can be found: http://www.malinov.com/Home/sergeys-projects/minimax8085

Schematic and Layout

http://www.malinov.com/Home/sergeys-projects/minimax8085

Aug 27,2019

6,477 views

Minimal 8085 Single Board Computer - MiniMax8085 by Sergey Kiselev

2 Layers PCB 80 x 100 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen

The MiniMax8085 is a Single Board Computer based on the Intel 8085A CPU.

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Published: Aug 27,2019

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Topic

DIY Electronics

Programmable Logic Projects

SInle board computer SBC 8085

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