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(MESS) c128: MMU WIP. (nw)

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This commit is contained in:
Curt Coder 2012-09-09 18:39:13 +00:00
parent db910043a6
commit 74a2cde889
2 changed files with 29 additions and 49 deletions
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72
src/mess/machine/mos8722.c
View File

@ -158,7 +158,14 @@ void mos8722_device::device_reset()
READ8_MEMBER( mos8722_device::read ) READ8_MEMBER( mos8722_device::read )
{ {
return 0; UINT8 data = 0;
if (!MCR_C64)
{
}
return data;
} }
@ -168,6 +175,10 @@ READ8_MEMBER( mos8722_device::read )
WRITE8_MEMBER( mos8722_device::write ) WRITE8_MEMBER( mos8722_device::write )
{ {
if (!MCR_C64)
{
}
} }
@ -177,47 +188,7 @@ WRITE8_MEMBER( mos8722_device::write )
READ_LINE_MEMBER( mos8722_device::fsdir_r ) READ_LINE_MEMBER( mos8722_device::fsdir_r )
{ {
return 1; return MCR_FSDIR;
}
//-------------------------------------------------
// ms0_r - memory status 0 read
//-------------------------------------------------
READ_LINE_MEMBER( mos8722_device::ms0_r )
{
return 1;
}
//-------------------------------------------------
// ms1_r - memory status 1 read
//-------------------------------------------------
READ_LINE_MEMBER( mos8722_device::ms1_r )
{
return 1;
}
//-------------------------------------------------
// ms2_r - memory status 2 read
//-------------------------------------------------
READ_LINE_MEMBER( mos8722_device::ms2_r )
{
return 1;
}
//-------------------------------------------------
// ms3_r - memory status 3 read
//-------------------------------------------------
READ_LINE_MEMBER( mos8722_device::ms3_r )
{
return 1;
} }
@ -225,7 +196,20 @@ READ_LINE_MEMBER( mos8722_device::ms3_r )
// ta_r - translated address read // ta_r - translated address read
//------------------------------------------------- //-------------------------------------------------
offs_t mos8722_device::ta_r(offs_t offset, int aec) offs_t mos8722_device::ta_r(offs_t offset, int aec, int *ms0, int *ms1, int *ms2, int *ms3)
{ {
return offset; offs_t ta = offset;
if (aec)
{
if (MCR_C64)
{
*ms0 = 1;
*ms1 = 1;
}
*ms3 = !MCR_C64;
}
return ta;
} }

6
src/mess/machine/mos8722.h
View File

@ -86,12 +86,8 @@ public:
DECLARE_WRITE8_MEMBER( write ); DECLARE_WRITE8_MEMBER( write );
DECLARE_READ_LINE_MEMBER( fsdir_r ); DECLARE_READ_LINE_MEMBER( fsdir_r );
DECLARE_READ_LINE_MEMBER( ms0_r );
DECLARE_READ_LINE_MEMBER( ms1_r );
DECLARE_READ_LINE_MEMBER( ms2_r );
DECLARE_READ_LINE_MEMBER( ms3_r );
offs_t ta_r(offs_t offset, int aec); offs_t ta_r(offs_t offset, int aec, int *ms0, int *ms1, int *ms2, int *ms3);
protected: protected:
// device-level overrides // device-level overrides