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(MESS) vic20: Fixed 16K RAM expansion. (nw)

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This commit is contained in:
Curt Coder 2012-09-06 14:49:49 +00:00
parent 11b496cbc2
commit cade999fbc
1 changed files with 12 additions and 4 deletions
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16
src/mess/machine/vic1111.c
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@ -51,9 +51,13 @@ void vic1111_device::device_start()
UINT8 vic1111_device::vic20_cd_r(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) UINT8 vic1111_device::vic20_cd_r(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3)
{ {
if (!blk1 || !blk2) if (!blk1)
{ {
data = m_ram[offset & 0x3fff]; data = m_ram[offset];
}
else if (!blk2)
{
data = m_ram[0x2000 + offset];
} }
return data; return data;
@ -66,8 +70,12 @@ UINT8 vic1111_device::vic20_cd_r(address_space &space, offs_t offset, UINT8 data
void vic1111_device::vic20_cd_w(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) void vic1111_device::vic20_cd_w(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3)
{ {
if (!blk1 || !blk2) if (!blk1)
{ {
m_ram[offset & 0x3fff] = data; m_ram[offset] = data;
}
else if (!blk2)
{
m_ram[0x2000 + offset] = data;
} }
} }