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This commit is contained in:
Jeff Parsons 2016-03-09 14:22:26 -08:00
commit 0735ea8186
9 changed files with 61 additions and 45 deletions
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modules/pcjs/lib/bus.js
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@ -504,7 +504,7 @@ Bus.prototype.getA20 = function()
/**
* setA20(fEnable)
*
* On 32-bit bus machines, I've adopted the approach that Compaq took with DeskPro 386 machines,
* On 32-bit bus machines, I've adopted the approach that COMPAQ took with DeskPro 386 machines,
* which is to map the 1st Mb to the 2nd Mb whenever A20 is disabled, rather than blindly masking
* the A20 address bit from all addresses; in fact, this is what the DeskPro 386 ROM BIOS requires.
*