mirror of
https://github.com/AppleWin/AppleWin.git
synced 2024-12-23 16:30:23 +00:00
107 lines
3.4 KiB
C++
107 lines
3.4 KiB
C++
/*
|
|
AppleWin : An Apple //e emulator for Windows
|
|
|
|
Copyright (C) 1994-1996, Michael O'Brien
|
|
Copyright (C) 1999-2001, Oliver Schmidt
|
|
Copyright (C) 2002-2005, Tom Charlesworth
|
|
Copyright (C) 2006-2007, Tom Charlesworth, Michael Pohoreski
|
|
|
|
AppleWin is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
AppleWin is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with AppleWin; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
/* Description: This module is created for emulation of the 8bit character mode (mode 1) switch,
|
|
* which is located in $c060, and so far does not intend to emulate a tape device.
|
|
*
|
|
*
|
|
* Author: Various
|
|
*/
|
|
|
|
#include "StdAfx.h"
|
|
|
|
#include "AppleWin.h"
|
|
#include "Keyboard.h"
|
|
#include "Memory.h"
|
|
|
|
static bool g_CapsLockAllowed = false;
|
|
|
|
//---------------------------------------------------------------------------
|
|
|
|
BYTE __stdcall TapeRead(WORD, WORD address, BYTE, BYTE, ULONG nCyclesLeft)
|
|
{
|
|
/*
|
|
If retrieving KeybGetKeycode(); causes problems uCurrentKeystroke shall be added
|
|
in the submission variables and it shall be added by the TapeRead caller
|
|
i.e. BYTE __stdcall TapeRead (WORD, WORD address, BYTE, BYTE, ULONG nCyclesLeft) shall become
|
|
BYTE __stdcall TapeRead (WORD, WORD address, BYTE, BYTE, ULONG nCyclesLeft, BYTE uCurrentKeystroke)
|
|
*/
|
|
|
|
if (g_Apple2Type == A2TYPE_PRAVETS8A)
|
|
{
|
|
const BYTE uCurrentKeystroke = KeybGetKeycode();
|
|
BYTE C060 = MemReadFloatingBus(nCyclesLeft);
|
|
|
|
if (g_CapsLockAllowed) //8bit keyboard mode
|
|
{
|
|
if (((P8CAPS_ON == false) && (P8Shift == false)) || ((P8CAPS_ON ) && (P8Shift ))) //LowerCase
|
|
{
|
|
if ((uCurrentKeystroke<65) //|| ((uCurrentKeystroke>90) && (uCurrentKeystroke<96))
|
|
|| ((uCurrentKeystroke>126) && (uCurrentKeystroke<193)))
|
|
C060 |= 1 << 7; //Sets bit 7 to 1 for special keys (arrows, return, etc) and for control+ key combinations.
|
|
else
|
|
C060 &= 127; //sets bit 7 to 0
|
|
}
|
|
else //UpperCase
|
|
{
|
|
C060 |= 1 << 7;
|
|
}
|
|
}
|
|
else //7bit keyboard mode
|
|
{
|
|
C060 &= 191; //Sets bit 6 to 0; I am not sure if this shall be done, because its value is disregarded in this case.
|
|
C060 |= 1 << 7; //Sets bit 7 to 1
|
|
}
|
|
|
|
return C060;
|
|
}
|
|
|
|
return (1<<7) | (MemReadFloatingBus(nCyclesLeft) & 0x7F); // Keep high-bit fixed (since TAPEIN isn't supported)
|
|
}
|
|
|
|
/*
|
|
In case s.o. decides to develop tape device emulation, this function may be renamed,
|
|
because tape is not written in $C060
|
|
*/
|
|
BYTE __stdcall TapeWrite(WORD programcounter, WORD address, BYTE write, BYTE value, ULONG nCyclesLeft)
|
|
{
|
|
if (g_Apple2Type == A2TYPE_PRAVETS8A)
|
|
{
|
|
if (value & 1)
|
|
g_CapsLockAllowed = true;
|
|
else
|
|
g_CapsLockAllowed = false;
|
|
|
|
//If bit0 of the input byte is 0, it will forbid 8-bit characters (Default)
|
|
//If bit0 of the input byte is 1, it will allow 8-bit characters
|
|
return 0;
|
|
}
|
|
|
|
return MemReadFloatingBus(nCyclesLeft);
|
|
}
|
|
|
|
bool GetCapsLockAllowed(void)
|
|
{
|
|
return g_CapsLockAllowed;
|
|
}
|