protected override void UpdateMapping()
{
m_lock = (CMR0 & 0x20) != 0;
var norom = CPUS; // CPUS
if (!norom)
{
if (m_lock)
{
SetAfeAfb(AFE, (byte)(AFB & 0x7F), false);
}
if (DOSEN && CPNET) // what is CPNET?
{
// more priority, then 7FFD
SetAfeAfb(AFE, (byte)(AFB | 0x80), false);
}
}
int romPage;
if (CPSYS)
{
romPage = GetRomIndex(RomId.ROM_SYS);
}
else if (DOSEN) // trdos or 48/128
{
romPage = GetRomIndex(RomId.ROM_DOS);
}
else
{
romPage = (CMR0 & 0x10) != 0 ?
GetRomIndex(RomId.ROM_SOS) :
GetRomIndex(RomId.ROM_128);
}
romPage |= CMR1 & 4; // extended 64K rom (if exists)
var videoPage = (CMR0 & 0x08) == 0 ? 5 : 7;
var ramPage = CMR0 & 7;
var sega = CMR1 & 3; // & 7 for 1024K
ramPage |= sega << 3;
if (m_ulaAtm != null)
{
var videoMode = (AtmVideoMode)(((AFE >> 6) & 1) | ((AFE >> 4) & 2)); // (m_aFE >> 5) & 3
m_ulaAtm.SetPageMappingAtm(
videoMode,
videoPage,
norom ? 0 : -1,
norom ? 4 : 5,
2,
ramPage);
}
else
{
m_ula.SetPageMapping(
videoPage,
norom ? 0 : -1,
norom ? 4 : 5,
2,
ramPage);
}
MapRead0000 = norom ? RamPages[0] : RomPages[romPage];
MapRead4000 = norom ? RamPages[4] : RamPages[5];
MapRead8000 = RamPages[2];
MapReadC000 = RamPages[ramPage];
MapWrite0000 = norom ? MapRead0000 : m_trashPage;
MapWrite4000 = MapRead4000;
MapWrite8000 = MapRead8000;
MapWriteC000 = MapReadC000;
}
protected override void UpdateMapping()
{
m_lock = (CMR0 & 0x20) != 0;
if (PEN)
{
int videoPage = (CMR0 & 0x08) == 0 ? 5 : 7;
if (m_ulaAtm != null)
{
m_ulaAtm.SetPageMappingAtm(
RG, videoPage, -1, -1, -1, -1);
}
else
{
m_ula.SetPageMapping(
videoPage, -1, -1, -1, -1);
}
int romPage = RomPages.Length - 1;
MapRead0000 = RomPages[romPage];
MapRead4000 = RomPages[romPage];
MapRead8000 = RomPages[romPage];
MapReadC000 = RomPages[romPage];
MapWrite0000 = m_trashPage;
MapWrite4000 = m_trashPage;
MapWrite8000 = m_trashPage;
MapWriteC000 = m_trashPage;
Map48[0] = -1;
Map48[1] = -1;
Map48[2] = -1;
Map48[3] = -1;
}
else
{
int videoPage = (CMR0 & 0x08) == 0 ? 5 : 7;
var index = (CMR0 & 0x10) >> 2;
var w0 = m_ru2[index + 0] ^ 0xFF;
var w1 = m_ru2[index + 1] ^ 0xFF;
var w2 = m_ru2[index + 2] ^ 0xFF;
var w3 = m_ru2[index + 3] ^ 0xFF;
var kpa0 = CMR0 & 7;
var kpa8 = (DOSEN | SYSEN) ? 1 : 0;
var romPage0 = ((w0 & 0x80) == 0 ? kpa8 | (w0 & 6) : w0 & 7) & m_romMask;
var romPage1 = ((w1 & 0x80) == 0 ? kpa8 | (w1 & 6) : w1 & 7) & m_romMask;
var romPage2 = ((w2 & 0x80) == 0 ? kpa8 | (w2 & 6) : w2 & 7) & m_romMask;
var romPage3 = ((w3 & 0x80) == 0 ? kpa8 | (w3 & 6) : w3 & 7) & m_romMask;
var ramPage0 = ((w0 & 0x80) == 0 ? (w0 & 0x38) | kpa0 : w0 & 0x3F) & m_ramMask;
var ramPage1 = ((w1 & 0x80) == 0 ? (w1 & 0x38) | kpa0 : w1 & 0x3F) & m_ramMask;
var ramPage2 = ((w2 & 0x80) == 0 ? (w2 & 0x38) | kpa0 : w2 & 0x3F) & m_ramMask;
var ramPage3 = ((w3 & 0x80) == 0 ? (w3 & 0x38) | kpa0 : w3 & 0x3F) & m_ramMask;
var isRam0 = (w0 & 0x40) == 0;
var isRam1 = (w1 & 0x40) == 0;
var isRam2 = (w2 & 0x40) == 0;
var isRam3 = (w3 & 0x40) == 0;
if (m_ulaAtm != null)
{
m_ulaAtm.SetPageMappingAtm(
RG,
videoPage,
isRam0 ? ramPage0 : -1,
isRam1 ? ramPage1 : -1,
isRam2 ? ramPage2 : -1,
isRam3 ? ramPage3 : -1);
}
else
{
m_ula.SetPageMapping(
videoPage,
isRam0 ? ramPage0 : -1,
isRam1 ? ramPage1 : -1,
isRam2 ? ramPage2 : -1,
isRam3 ? ramPage3 : -1);
}
MapRead0000 = isRam0 ? RamPages[ramPage0] : RomPages[romPage0];
MapRead4000 = isRam1 ? RamPages[ramPage1] : RomPages[romPage1];
MapRead8000 = isRam2 ? RamPages[ramPage2] : RomPages[romPage2];
MapReadC000 = isRam3 ? RamPages[ramPage3] : RomPages[romPage3];
MapWrite0000 = isRam0 ? MapRead0000 : m_trashPage;
MapWrite4000 = isRam1 ? MapRead4000 : m_trashPage;
MapWrite8000 = isRam2 ? MapRead8000 : m_trashPage;
MapWriteC000 = isRam3 ? MapReadC000 : m_trashPage;
Map48[0] = isRam0 ? -1 : romPage0;
Map48[1] = isRam1 ? ramPage1 : -1;
Map48[2] = isRam2 ? ramPage2 : -1;
Map48[3] = isRam3 ? ramPage3 : -1;
}
}