Apple-2-Tools/AppleWin
1
0
Fork 0
mirror of https://github.com/AppleWin/AppleWin.git synced 2026-04-20 15:17:50 +00:00
Code Issues Projects Releases Wiki Activity

Support NSC for Apple II/II+ via F8-ROM (#827 PR #873)

Browse Source
This commit is contained in:
TomCh
2020-11-25 21:57:34 +00:00
committed by GitHub
parent c455488b50
commit 6e166dfff6
8 changed files with 137 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files
source/NoSlotClock.cpp
+17 -4
View File
@@ -59,7 +59,20 @@ void CNoSlotClock::Reset()
m_bWriteEnabled = true;
}
bool CNoSlotClock::Read(int address, int& data)
bool CNoSlotClock::ReadWrite(int address, BYTE& data, BYTE write)
{
if (!write)
{
return Read(address, data);
}
else
{
Write(address);
return true;
}
}
bool CNoSlotClock::Read(int address, BYTE& data)
{
// this may read or write the clock (returns true if data is changed)
if (address & 0x04)
@@ -74,14 +87,14 @@ bool CNoSlotClock::Read(int address, int& data)
void CNoSlotClock::Write(int address)
{
// this may read or write the clock
int dummy = 0;
BYTE dummy = 0;
if (address & 0x04)
ClockRead(dummy);
else
ClockWrite(address);
}
bool CNoSlotClock::ClockRead(int& data)
bool CNoSlotClock::ClockRead(BYTE& data)
{
// for a ROM, A2 high = read, and data out (if any) is on D0
if (!m_bClockRegisterEnabled)
@@ -243,7 +256,7 @@ void CNoSlotClock::RingRegister64::WriteBit(int data)
m_Register = (data & 0x1) ? (m_Register | m_Mask) : (m_Register & ~m_Mask);
}
void CNoSlotClock::RingRegister64::ReadBit(int& data)
void CNoSlotClock::RingRegister64::ReadBit(BYTE& data)
{
data = (m_Register & m_Mask) ? data | 1 : data & ~1;
}