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Author Topic: A600 8Mb fast expansion  (Read 33426 times)

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Offline boing4000

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Re: A600 8Mb fast expansion
« on: June 16, 2008, 03:44:46 PM »
Quote

AJCopland wrote:

I did take a look at using some of the spare IO on the MiniMig 1.1 board to try and do some "dead-bug" style modding with a single 64Mbit SDRAM chip but I don't think that approach would actually be feasible for a host of reasons. Besides I'm still building my FIRST MiniMig! :-D

Andy



Spare-I/O offers 3 bit, adding 15/31khz pin as IO make 4 bit for extra use. It could help for addressing more (s)ram.
Altering the existing internal ram structure could be used to have 512kb chipram and 1mb real fast ram starting at $200000 (with propper autoconfig entry). In this case bootrom.v has to be adapted to work with less then 1mb of chipram.
I hope your first selfmade minimig will be finished soon :-)