diff options
Diffstat (limited to 'src/devices/machine/dp8390.cpp')
-rw-r--r-- | src/devices/machine/dp8390.cpp | 73 |
1 files changed, 33 insertions, 40 deletions
diff --git a/src/devices/machine/dp8390.cpp b/src/devices/machine/dp8390.cpp index c898332d1f4..c238801122b 100644 --- a/src/devices/machine/dp8390.cpp +++ b/src/devices/machine/dp8390.cpp @@ -28,7 +28,6 @@ dp8390_device::dp8390_device(const machine_config &mconfig, device_type type, co , m_mem_read_cb(*this) , m_mem_write_cb(*this) , m_reset(0) - , m_cs(false) , m_rdma_active(0) { } @@ -172,33 +171,29 @@ void dp8390_device::recv_cb(uint8_t *buf, int len) { if(!LOOPBACK) recv(buf, len); } -WRITE_LINE_MEMBER(dp8390_device::dp8390_cs) { - m_cs = state; -} - WRITE_LINE_MEMBER(dp8390_device::dp8390_reset) { if(!state) device_reset(); } -uint16_t dp8390_device::dp8390_r(offs_t offset) { - uint16_t data; - if(m_cs) { - uint32_t high16 = (m_regs.dcr & 4)?m_regs.rsar<<16:0; - if(m_regs.dcr & 1) { - m_regs.crda &= ~1; - data = m_mem_read_cb(high16 + m_regs.crda++); - data |= m_mem_read_cb(high16 + m_regs.crda++) << 8; - m_regs.rbcr -= (m_regs.rbcr < 2)?m_regs.rbcr:2; - check_dma_complete(); - return DP8390_BYTE_ORDER(data); - } else { - m_regs.rbcr -= (m_regs.rbcr)?1:0; - data = m_mem_read_cb(high16 + m_regs.crda++); - check_dma_complete(); - return data; - } +uint16_t dp8390_device::remote_read() { + uint32_t high16 = (m_regs.dcr & 4)?m_regs.rsar<<16:0; + if(m_regs.dcr & 1) { + m_regs.crda &= ~1; + uint16_t data = m_mem_read_cb(high16 + m_regs.crda++); + data |= m_mem_read_cb(high16 + m_regs.crda++) << 8; + m_regs.rbcr -= (m_regs.rbcr < 2)?m_regs.rbcr:2; + check_dma_complete(); + return DP8390_BYTE_ORDER(data); + } else { + m_regs.rbcr -= (m_regs.rbcr)?1:0; + uint16_t data = m_mem_read_cb(high16 + m_regs.crda++); + check_dma_complete(); + return data; } +} +uint8_t dp8390_device::cs_read(offs_t offset) { + uint8_t data; switch((offset & 0x0f)|(m_regs.cr & 0xc0)) { case 0x00: case 0x40: @@ -350,26 +345,24 @@ uint16_t dp8390_device::dp8390_r(offs_t offset) { return data; } -void dp8390_device::dp8390_w(offs_t offset, uint16_t data) { - if(m_cs) { - uint32_t high16 = (m_regs.dcr & 4)?m_regs.rsar<<16:0; - if(m_regs.dcr & 1) { - data = DP8390_BYTE_ORDER(data); - m_regs.crda &= ~1; - m_mem_write_cb(high16 + m_regs.crda++, data & 0xff); - m_mem_write_cb(high16 + m_regs.crda++, data >> 8); - m_regs.rbcr -= (m_regs.rbcr < 2)?m_regs.rbcr:2; - check_dma_complete(); - } else { - data &= 0xff; - m_mem_write_cb(high16 + m_regs.crda++, data); - m_regs.rbcr -= (m_regs.rbcr)?1:0; - check_dma_complete(); - } - return; +void dp8390_device::remote_write(uint16_t data) { + uint32_t high16 = (m_regs.dcr & 4)?m_regs.rsar<<16:0; + if(m_regs.dcr & 1) { + data = DP8390_BYTE_ORDER(data); + m_regs.crda &= ~1; + m_mem_write_cb(high16 + m_regs.crda++, data & 0xff); + m_mem_write_cb(high16 + m_regs.crda++, data >> 8); + m_regs.rbcr -= (m_regs.rbcr < 2)?m_regs.rbcr:2; + check_dma_complete(); + } else { + data &= 0xff; + m_mem_write_cb(high16 + m_regs.crda++, data); + m_regs.rbcr -= (m_regs.rbcr)?1:0; + check_dma_complete(); } +} - data &= 0xff; +void dp8390_device::cs_write(offs_t offset, uint8_t data) { switch((offset & 0x0f)|(m_regs.cr & 0xc0)) { case 0x00: case 0x40: |