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Writes to Printer Interface card strobe should not be interpreted as a data byte (#1017 PR #1027)

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sh95014 2022-02-11 12:57:09 -08:00 committed by GitHub
parent 3d39698d2c
commit 9459ec261a
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1 changed files with 5 additions and 1 deletions
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6
source/ParallelPrinter.cpp
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@ -142,11 +142,15 @@ static BYTE __stdcall PrintStatus(WORD, WORD, BYTE, BYTE, ULONG)
} }
//=========================================================================== //===========================================================================
static BYTE __stdcall PrintTransmit(WORD, WORD, BYTE, BYTE value, ULONG) static BYTE __stdcall PrintTransmit(WORD, WORD address, BYTE, BYTE value, ULONG)
{ {
if (!CheckPrint()) if (!CheckPrint())
return 0; return 0;
// only allow writes to the load output port (i.e., $C090)
if ((address & 0xF) != 0)
return 0;
BYTE c = value & 0x7F; BYTE c = value & 0x7F;
if (IsPravets(GetApple2Type())) if (IsPravets(GetApple2Type()))