diff options
Diffstat (limited to 'src/devices/machine/6525tpi.cpp')
-rw-r--r-- | src/devices/machine/6525tpi.cpp | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/src/devices/machine/6525tpi.cpp b/src/devices/machine/6525tpi.cpp index cffb9ba5f50..addebf837b1 100644 --- a/src/devices/machine/6525tpi.cpp +++ b/src/devices/machine/6525tpi.cpp @@ -476,7 +476,18 @@ void tpi6525_device::write(offs_t offset, uint8_t data) m_port_c = data; if (!INTERRUPT_MODE) + { m_out_pc_cb((offs_t)0, (m_port_c & m_ddr_c) | (m_ddr_c ^ 0xff)); + } + else + { + // clear latches + if (BIT(data, 0) == 0) m_irq_level[0] = 1; + if (BIT(data, 1) == 0) m_irq_level[1] = 1; + if (BIT(data, 2) == 0) m_irq_level[2] = 1; + if (BIT(data, 3) == 0) m_irq_level[3] = INTERRUPT3_RISING_EDGE ? 0 : 1; + if (BIT(data, 4) == 0) m_irq_level[4] = INTERRUPT4_RISING_EDGE ? 0 : 1; + } break; case 3: @@ -532,20 +543,3 @@ void tpi6525_device::port_line_w(uint8_t &port, int line, int state) port &= ~(1 << line); port |= state << line; } - -/* this should probably be done better, needed for amigacd.c */ - -uint8_t tpi6525_device::get_ddr_a() -{ - return m_ddr_a; -} - -uint8_t tpi6525_device::get_ddr_b() -{ - return m_ddr_b; -} - -uint8_t tpi6525_device::get_ddr_c() -{ - return m_ddr_c; -} |