Trump card addressing

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Silvester
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Joined: Thu Dec 12, 2013 10:14 am
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Trump card addressing

Post by Silvester »

I see from logic of Trump card PAL 1 (1v4) access to WD1772 is assigned to area $1C000-$1DFFF. Has anyone any info of further decode in this area? More to the point; would incidental access to $1C060 & $1C064 (ie. for proof of GC/SGC existence) potentially cause upset to FLP hardware/driver?

Addresses assigned to WD1772 registers/drive select can be extracted from driver source, but I can't be sure of potential incomplete decode.

Edit : Nope
$1C000-$1DFFF = WD1772 chip select (A1-A0 = A1-A0)
$1E000-$1FFFF = 74F175 clock (D3-D0 = side/motor/ds1/ds2)

Lots of incomplete addressing.


David
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