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Finally, a working keyboard scanner for GbNet

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Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
This commit is contained in:
Adrian Conlon 2019-08-03 17:47:06 +01:00
parent db8ad5ad5b
commit cd80935470
1 changed files with 5 additions and 5 deletions
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10
LR35902/IoRegisters.cs
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@ -338,11 +338,11 @@ namespace EightBit.GameBoy
var directionKeys = this.scanP14 && !this.p14;
var miscKeys = this.scanP15 && !this.p15;
var live = directionKeys || miscKeys;
var rightOrA = live && this.p10 ? 0 : 1;
var leftOrB = live && this.p11 ? 0 : 1;
var upOrSelect = live && this.p12 ? 0 : 1;
var downOrStart = live && this.p13 ? 0 : 1;
var lowNibble = (byte)(rightOrA | (leftOrB << 1) | (upOrSelect << 2) | (downOrStart << 3));
var rightOrA = (live && !this.p10) ? 0 : Bits.Bit0;
var leftOrB = (live && !this.p11) ? 0 : Bits.Bit1;
var upOrSelect = (live && !this.p12) ? 0 : Bits.Bit2;
var downOrStart = (live && !this.p13) ? 0 : Bits.Bit3;
var lowNibble = (byte)(rightOrA | leftOrB | upOrSelect | downOrStart);
var highNibble = (byte)Chip.PromoteNibble((byte)Mask.Mask4);
var value = (byte)(lowNibble | highNibble);
this.Poke(port, value);