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Use buffer devices (nw)

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This commit is contained in:
R. Belmont 2014-03-02 18:00:57 +00:00
parent dcaa1db090
commit e3035b01a4
2 changed files with 13 additions and 37 deletions
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38
src/emu/bus/a2bus/a2pic.c
View File

@ -23,15 +23,11 @@ const device_type A2BUS_PIC = &device_creator<a2bus_pic_device>;
MACHINE_CONFIG_FRAGMENT( pic )
MCFG_CENTRONICS_ADD(PIC_CENTRONICS_TAG, centronics_printers, "image")
MCFG_CENTRONICS_DATA0_HANDLER(WRITELINE(a2bus_pic_device, datain0_w))
MCFG_CENTRONICS_DATA1_HANDLER(WRITELINE(a2bus_pic_device, datain1_w))
MCFG_CENTRONICS_DATA2_HANDLER(WRITELINE(a2bus_pic_device, datain2_w))
MCFG_CENTRONICS_DATA3_HANDLER(WRITELINE(a2bus_pic_device, datain3_w))
MCFG_CENTRONICS_DATA4_HANDLER(WRITELINE(a2bus_pic_device, datain4_w))
MCFG_CENTRONICS_DATA5_HANDLER(WRITELINE(a2bus_pic_device, datain5_w))
MCFG_CENTRONICS_DATA6_HANDLER(WRITELINE(a2bus_pic_device, datain6_w))
MCFG_CENTRONICS_DATA7_HANDLER(WRITELINE(a2bus_pic_device, datain7_w))
MCFG_CENTRONICS_DATA_INPUT_BUFFER("ctx_data_in")
MCFG_CENTRONICS_ACK_HANDLER(WRITELINE(a2bus_pic_device, ack_w))
MCFG_DEVICE_ADD("ctx_data_in", INPUT_BUFFER, 0)
MCFG_CENTRONICS_OUTPUT_LATCH_ADD("ctx_data_out", PIC_CENTRONICS_TAG)
MACHINE_CONFIG_END
ROM_START( pic )
@ -105,6 +101,8 @@ a2bus_pic_device::a2bus_pic_device(const machine_config &mconfig, const char *ta
device_a2bus_card_interface(mconfig, *this),
m_dsw1(*this, "DSW1"),
m_ctx(*this, PIC_CENTRONICS_TAG),
m_ctx_data_in(*this, "ctx_data_in"),
m_ctx_data_out(*this, "ctx_data_out"),
m_started(false)
{
}
@ -114,6 +112,8 @@ a2bus_pic_device::a2bus_pic_device(const machine_config &mconfig, device_type ty
device_a2bus_card_interface(mconfig, *this),
m_dsw1(*this, "DSW1"),
m_ctx(*this, PIC_CENTRONICS_TAG),
m_ctx_data_in(*this, "ctx_data_in"),
m_ctx_data_out(*this, "ctx_data_out"),
m_started(false)
{
}
@ -134,7 +134,6 @@ void a2bus_pic_device::device_start()
m_timer->adjust(attotime::never);
save_item(NAME(m_ack));
save_item(NAME(m_datain));
save_item(NAME(m_irqenable));
save_item(NAME(m_autostrobe));
}
@ -143,7 +142,6 @@ void a2bus_pic_device::device_reset()
{
m_started = true;
m_ack = 0;
m_datain = 0;
m_irqenable = false;
m_autostrobe = false;
lower_slot_irq();
@ -185,7 +183,7 @@ UINT8 a2bus_pic_device::read_c0nx(address_space &space, UINT8 offset)
switch (offset)
{
case 3:
return m_datain;
return m_ctx_data_in->read();
case 4:
return m_ack;
@ -214,14 +212,7 @@ void a2bus_pic_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data
switch (offset)
{
case 0: // set data out and send a strobe
m_ctx->write_data0(data&0x01);
m_ctx->write_data1((data&0x02)>>1);
m_ctx->write_data2((data&0x04)>>2);
m_ctx->write_data3((data&0x08)>>3);
m_ctx->write_data4((data&0x10)>>4);
m_ctx->write_data5((data&0x20)>>5);
m_ctx->write_data6((data&0x40)>>6);
m_ctx->write_data7((data&0x80)>>7);
m_ctx_data_out->write(data);
if (m_autostrobe)
{
@ -245,15 +236,6 @@ void a2bus_pic_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data
}
}
WRITE_LINE_MEMBER( a2bus_pic_device::datain0_w ) { m_datain &= ~0x01; m_datain |= (state == ASSERT_LINE) ? 0x01 : 0; }
WRITE_LINE_MEMBER( a2bus_pic_device::datain1_w ) { m_datain &= ~0x02; m_datain |= (state == ASSERT_LINE) ? 0x02 : 0; }
WRITE_LINE_MEMBER( a2bus_pic_device::datain2_w ) { m_datain &= ~0x04; m_datain |= (state == ASSERT_LINE) ? 0x04 : 0; }
WRITE_LINE_MEMBER( a2bus_pic_device::datain3_w ) { m_datain &= ~0x08; m_datain |= (state == ASSERT_LINE) ? 0x08 : 0; }
WRITE_LINE_MEMBER( a2bus_pic_device::datain4_w ) { m_datain &= ~0x10; m_datain |= (state == ASSERT_LINE) ? 0x10 : 0; }
WRITE_LINE_MEMBER( a2bus_pic_device::datain5_w ) { m_datain &= ~0x20; m_datain |= (state == ASSERT_LINE) ? 0x20 : 0; }
WRITE_LINE_MEMBER( a2bus_pic_device::datain6_w ) { m_datain &= ~0x40; m_datain |= (state == ASSERT_LINE) ? 0x40 : 0; }
WRITE_LINE_MEMBER( a2bus_pic_device::datain7_w ) { m_datain &= ~0x80; m_datain |= (state == ASSERT_LINE) ? 0x80 : 0; }
WRITE_LINE_MEMBER( a2bus_pic_device::ack_w )
{
if (m_started)

12
src/emu/bus/a2bus/a2pic.h
View File

@ -33,14 +33,6 @@ public:
required_ioport m_dsw1;
DECLARE_WRITE_LINE_MEMBER( datain0_w );
DECLARE_WRITE_LINE_MEMBER( datain1_w );
DECLARE_WRITE_LINE_MEMBER( datain2_w );
DECLARE_WRITE_LINE_MEMBER( datain3_w );
DECLARE_WRITE_LINE_MEMBER( datain4_w );
DECLARE_WRITE_LINE_MEMBER( datain5_w );
DECLARE_WRITE_LINE_MEMBER( datain6_w );
DECLARE_WRITE_LINE_MEMBER( datain7_w );
DECLARE_WRITE_LINE_MEMBER( ack_w );
protected:
@ -53,6 +45,8 @@ protected:
virtual UINT8 read_cnxx(address_space &space, UINT8 offset);
required_device<centronics_device> m_ctx;
required_device<input_buffer_device> m_ctx_data_in;
required_device<output_latch_device> m_ctx_data_out;
void start_strobe();
void clear_strobe();
@ -60,7 +54,7 @@ protected:
private:
UINT8 *m_rom;
bool m_started;
UINT8 m_ack, m_datain;
UINT8 m_ack;
bool m_irqenable;
bool m_autostrobe;
emu_timer *m_timer;