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don't crash on garbage values roadedge / samsh64 write on startup (nw)

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This commit is contained in:
mamehaze 2015-03-09 00:37:34 +00:00
parent c11d8fcdc6
commit bbeddce0b4
1 changed files with 5 additions and 0 deletions
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5
src/emu/cpu/nec/v53.c
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@ -202,6 +202,7 @@ void v53_base_device::install_peripheral_io()
if (m_OPSEL & 0x01) // DMA Unit available if (m_OPSEL & 0x01) // DMA Unit available
{ {
UINT16 base = (m_OPHA << 8) | m_DULA; UINT16 base = (m_OPHA << 8) | m_DULA;
base &= 0xfffe;
if (m_SCTL & 0x02) // uPD71037 mode if (m_SCTL & 0x02) // uPD71037 mode
{ {
@ -222,6 +223,7 @@ void v53_base_device::install_peripheral_io()
if (m_OPSEL & 0x02) // Interupt Control Unit available if (m_OPSEL & 0x02) // Interupt Control Unit available
{ {
UINT16 base = (m_OPHA << 8) | m_IULA; UINT16 base = (m_OPHA << 8) | m_IULA;
base &= 0xfffe;
if (IOAG) // 8-bit if (IOAG) // 8-bit
{ {
@ -239,6 +241,7 @@ void v53_base_device::install_peripheral_io()
{ {
UINT16 base = (m_OPHA << 8) | m_TULA; UINT16 base = (m_OPHA << 8) | m_TULA;
//printf("installing TCU to %04x\n", base); //printf("installing TCU to %04x\n", base);
base &= 0xfffe;
if (IOAG) // 8-bit if (IOAG) // 8-bit
{ {
@ -256,6 +259,8 @@ void v53_base_device::install_peripheral_io()
if (m_OPSEL & 0x08) // Serial Control Unit available if (m_OPSEL & 0x08) // Serial Control Unit available
{ {
UINT16 base = (m_OPHA << 8) | m_SULA; UINT16 base = (m_OPHA << 8) | m_SULA;
base &= 0xfffe;
if (IOAG) // 8-bit if (IOAG) // 8-bit
{ {