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Support for the BEXT instruction

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The BEXT instruction is needed for the Unisonic Champion driver which I'm building.
The Intellivision doesn't need it since its EBCA0, EBCA1,EBCA2 and EBCA3 pins are grounded.
The method used was a suggestion from RB
This commit is contained in:
David Viens 2014-10-24 21:42:41 -04:00
parent 0fcd9bf702
commit 754a24b583
1 changed files with 11 additions and 1 deletions
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12
src/emu/cpu/cp1610/cp1610.h
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@ -33,13 +33,21 @@ enum
#define CP1610_RESET INPUT_LINE_RESET /* Non-Maskable */
#define CP1610_INT_INTR INPUT_LINE_NMI /* Non-Maskable */
#define MCFG_CP1610_BEXT_CALLBACK(_read) \
downcast<cp1610_cpu_device *>(device)->set_bext_callback(DEVCB_##_read);
class cp1610_cpu_device : public cpu_device
{
public:
// construction/destruction
cp1610_cpu_device(const machine_config &mconfig, const char *_tag, device_t *_owner, UINT32 _clock);
template<class _read> void set_bext_callback(_read rd)
{
m_read_bext.set_callback(rd);
}
protected:
// device-level overrides
virtual void device_start();
@ -79,6 +87,8 @@ private:
int m_mask_interrupts;
address_space *m_program;
int m_icount;
devcb_read8 m_read_bext;
void cp1610_illegal();
void cp1610_hlt();