diff options
Diffstat (limited to 'src/devices/machine/ins8154.cpp')
-rw-r--r-- | src/devices/machine/ins8154.cpp | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/src/devices/machine/ins8154.cpp b/src/devices/machine/ins8154.cpp index ff1cd79906e..11943cdee2c 100644 --- a/src/devices/machine/ins8154.cpp +++ b/src/devices/machine/ins8154.cpp @@ -78,6 +78,7 @@ void ins8154_device::device_start() save_item(NAME(m_mdr)); save_item(NAME(m_odra)); save_item(NAME(m_odrb)); + save_item(NAME(m_ram)); } @@ -97,7 +98,7 @@ void ins8154_device::device_reset() } -READ8_MEMBER(ins8154_device::ins8154_r) +uint8_t ins8154_device::read_io(offs_t offset) { uint8_t val = 0xff; @@ -146,7 +147,12 @@ READ8_MEMBER(ins8154_device::ins8154_r) return val; } -WRITE8_MEMBER(ins8154_device::ins8154_porta_w) +uint8_t ins8154_device::read_ram(offs_t offset) +{ + return m_ram[offset & 0x7f]; +} + +void ins8154_device::porta_w(uint8_t data) { m_out_a = data; @@ -155,7 +161,7 @@ WRITE8_MEMBER(ins8154_device::ins8154_porta_w) m_out_a_cb(offs_t(0), (data & m_odra) | (m_odra ^ 0xff)); } -WRITE8_MEMBER(ins8154_device::ins8154_portb_w) +void ins8154_device::portb_w(uint8_t data) { LOG("%s: INS8154 Write PortB %02x with odrb: %02x\n", machine().describe_context(), data, m_odrb); m_out_b = data; @@ -165,7 +171,7 @@ WRITE8_MEMBER(ins8154_device::ins8154_portb_w) m_out_b_cb(offs_t(0), (data & m_odrb) | (m_odrb ^ 0xff)); } -WRITE8_MEMBER(ins8154_device::ins8154_w) +void ins8154_device::write_io(offs_t offset, uint8_t data) { if (offset > 0x24) { @@ -176,11 +182,11 @@ WRITE8_MEMBER(ins8154_device::ins8154_w) switch (offset) { case 0x20: - ins8154_porta_w(space, 0, data); + porta_w(data); break; case 0x21: - ins8154_portb_w(space, 0, data); + portb_w(data); break; case 0x22: @@ -205,12 +211,12 @@ WRITE8_MEMBER(ins8154_device::ins8154_w) if (offset < 0x08) { LOGBITS("%s: INS8154 Port A set bit %02x\n", machine().describe_context(), offset & 0x07); - ins8154_porta_w(space, 0, m_out_a |= (1 << (offset & 0x07))); + porta_w(m_out_a |= (1 << (offset & 0x07))); } else { LOGBITS("%s: INS8154 Port B set bit %02x\n", machine().describe_context(), offset & 0x07); - ins8154_portb_w(space, 0, m_out_b |= (1 << (offset & 0x07))); + portb_w(m_out_b |= (1 << (offset & 0x07))); } } else @@ -219,14 +225,19 @@ WRITE8_MEMBER(ins8154_device::ins8154_w) if (offset < 0x08) { LOGBITS("%s: INS8154 Port A clear bit %02x\n", machine().describe_context(), offset & 0x07); - ins8154_porta_w(space, 0, m_out_a & ~(1 << (offset & 0x07))); + porta_w(m_out_a & ~(1 << (offset & 0x07))); } else { LOGBITS("%s: INS8154 Port B clear bit %02x\n", machine().describe_context(), offset & 0x07); - ins8154_portb_w(space, 0, m_out_b & ~(1 << (offset & 0x07))); + portb_w(m_out_b & ~(1 << (offset & 0x07))); } } break; } } + +void ins8154_device::write_ram(offs_t offset, uint8_t data) +{ + m_ram[offset & 0x7f] = data; +} |