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SDRAM as adress decoder

Posted: Mon Feb 22, 2016 3:46 pm
by grzeg2
Hello.
I would like the system 6502 get the opportunity to change the map memory and I / O on the fly.
He wants to apply SRAM as adress decoder.
What do you think about this idea, and what problems to pay attention.
Similar to:
http://mikenaberezny.com/hardware/proje ... placement/

Re: SDRAM as adress decoder

Posted: Mon Feb 22, 2016 4:52 pm
by BitWise
grzeg2 wrote:
Hello.
I would like the system 6502 get the opportunity to change the map memory and I / O on the fly.
He wants to apply SRAM as adress decoder.
What do you think about this idea, and what problems to pay attention.
Similar to:
http://mikenaberezny.com/hardware/proje ... placement/
It's possible. An operating system for the 6809, OS-9 level 2, used to use this trick.

https://en.m.wikipedia.org/wiki/OS-9