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more robust MB check
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BIN
PLASMA-SYS1.PO
BIN
PLASMA-SYS1.PO
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@ -213,7 +213,7 @@ asm psgWrite(pVIA, reg, val)#0
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INX
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RTS
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end
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asm viaCheck(pVIA)#2
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asm viaCheck(pVIA)#1
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PHP
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SEI
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LDA ESTKL,X
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@ -223,23 +223,18 @@ asm viaCheck(pVIA)#2
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STX ESP
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LDX #$80
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LDY #$04
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SEC
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- LDA (TMP),Y
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BMI +
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DEX
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BNE -
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TXA ; TIMEOUT
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BEQ ++
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+ TAX
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LDA (TMP),Y
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++ TAY
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TXA
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LDX ESP
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DEX
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+ SBC (TMP),Y
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++ LDX ESP
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STA ESTKL,X
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STY ESTKL+1,X
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LDA #$00
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STA ESTKH,X
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STA ESTKH+1,X
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PLP
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RTS
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end
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@ -404,13 +399,8 @@ end
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// Search slots for MockingBoard
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//
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def mbTicklePSG(pVIA)
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byte tmrBegin, tmrEnd
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word tmrDiff
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tmrBegin, tmrEnd = viaCheck(pVIA)
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tmrDiff = tmrEnd - tmrBegin
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//puts("VIA address: $"); puth(pVIA); puts(" Timer Diff = "); puti(tmrDiff); putln
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if tmrDiff == 10
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//puts("VIA address: $"); puth(pVIA); puts(" Timer Diff = "); puti(viaCheck(pVIA)); putln
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if viaCheck(pVIA) == 8 and viaCheck(pVIA) == 8 // Check twice
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pVIA->IER = $7F // Mask all interrupts
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//pVIA->ACR = $00 // Stop T1 countdown
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pVIA->DDRB = $FF // Output enable port A and B
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