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MiniMax8085 - Extension Board [message #9184]

Fri, 08 October 2021 14:23

Sergey
Messages: 236
Registered: October 2015
Location: Portland, OR

Senior Member

Hi,

I am designing an extension board for my MiniMax8085 SBC (https://github.com/skiselev/minimax8085 Wink

It is rather a mix of components, that hopefully will allow to run a bit more things than just the monitor and the BASIC interpreter:
- 8231A/Am9511A floating point coprocessor
- 8254 timer
- 8255 parallel port interface
- Additional 32 KiB SRAM, which can be switched in instead of the ROM

The preliminary schematic and the PCB layout are attached.

I'd appreciate your feedback!

Thanks,
Sergey

Attachment: Mini8085Ext-Schematic-0.9.pdf
(Size: 221.93KB, Downloaded 381 times)
Attachment: Mini8085Ext-Board-0.9.pdf
(Size: 88.59KB, Downloaded 413 times)

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[Message index]

		MiniMax8085 - Extension Board By: Sergey on Fri, 08 October 2021 14:23
		Re: MiniMax8085 - Extension Board By: b1ackmai1er on Fri, 08 October 2021 20:25
		Re: MiniMax8085 - Extension Board By: alkmar on Sat, 09 October 2021 13:39
		Re: MiniMax8085 - Extension Board By: Sergey on Mon, 18 October 2021 13:16
		Re: MiniMax8085 - Extension Board By: Sergey on Sat, 08 January 2022 00:19
		Re: MiniMax8085 - Extension Board By: Sergey on Fri, 14 January 2022 14:12
		Re: MiniMax8085 - Extension Board By: alkmar on Mon, 17 January 2022 13:30
		Re: MiniMax8085 - Extension Board By: alank2 on Sun, 23 January 2022 09:47
		Re: MiniMax8085 - Extension Board By: Sergey on Wed, 26 January 2022 08:05

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