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fix k/i input handling

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This commit is contained in:
hap 2015-02-15 20:31:35 +01:00
parent 925035f8f7
commit 6b6019207b
3 changed files with 11 additions and 14 deletions
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9
src/emu/cpu/amis2000/amis2000.c
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@ -156,8 +156,7 @@ void amis2000_device::device_start()
m_bu = 0;
m_acc = 0;
m_e = 0;
m_i = 0;
m_k = 0;
m_ki_mask = 0;
m_d = 0;
m_d_active = false;
m_d_polarity = 0;
@ -177,8 +176,7 @@ void amis2000_device::device_start()
save_item(NAME(m_bu));
save_item(NAME(m_acc));
save_item(NAME(m_e));
save_item(NAME(m_i));
save_item(NAME(m_k));
save_item(NAME(m_ki_mask));
save_item(NAME(m_d));
save_item(NAME(m_d_active));
save_item(NAME(m_d_polarity));
@ -214,8 +212,7 @@ void amis2000_device::device_reset()
m_d_polarity = 0;
m_d = 0; d_latch_out(false);
m_a = 0; m_write_a(0, 0, 0xffff);
m_i = 0xf;
m_k = 0xf;
m_ki_mask = 0xf;
}

3
src/emu/cpu/amis2000/amis2000.h
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@ -91,8 +91,7 @@ protected:
UINT8 m_bu; // 2/3-bit ram index y
UINT8 m_acc; // 4-bit accumulator
UINT8 m_e; // 4-bit generic register
UINT8 m_i; // 4-bit i-pins latch
UINT8 m_k; // 4-bit k-pins latch
UINT8 m_ki_mask; // 4-bit k/i-pins select latch
UINT8 m_d; // 8-bit d-pins latch
bool m_d_active; // d-pins available for direct i/o(floating), or outputting d-latch
UINT8 m_d_polarity; // invert d-latch output

13
src/emu/cpu/amis2000/amis2000op.inc
View File

@ -45,8 +45,7 @@ void amis2000_device::op_lai()
{
UINT8 param = m_op & 0x0f;
m_acc = param;
m_i = m_read_i(0, 0xff) & param;
m_k = m_read_k(0, 0xff) & param;
m_ki_mask = param;
}
}
@ -371,14 +370,16 @@ void amis2000_device::op_szm()
void amis2000_device::op_szi()
{
// SZI: skip next on zero I pin(s)
m_skip = !m_i;
// SZI: skip next on I pin(s)
// note: AMI's manual is ambiguous here
m_skip = ((m_read_i(0, 0xff) & m_ki_mask) != 0);
}
void amis2000_device::op_szk()
{
// SZK: skip next on zero K pin(s)
m_skip = !m_k;
// SZK: skip next on K pin(s)
// note: AMI's manual is ambiguous here
m_skip = ((m_read_k(0, 0xff) & m_ki_mask) != 0);
}
void amis2000_device::op_sbe()