mirror of
https://github.com/holub/mame
synced 2025-04-19 23:12:11 +03:00
aha1542a, aha1542b: Split out AIC-580 emulation to new device (nw)
This commit is contained in:
AJR
parent
cb231a5e92
commit
d4eb7c7d2c
@ -4078,6 +4078,18 @@ if (MACHINES["AIC565"]~=null) then
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}
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end
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---------------------------------------------------
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--
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--@src/devices/machine/aic580.h,MACHINES["AIC580"] = true
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---------------------------------------------------
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if (MACHINES["AIC580"]~=null) then
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files {
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MAME_DIR .. "src/devices/machine/aic580.cpp",
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MAME_DIR .. "src/devices/machine/aic580.h",
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}
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end
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---------------------------------------------------
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--
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--@src/devices/machine/aic6250.h,MACHINES["AIC6250"] = true
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@ -685,6 +685,7 @@ MACHINES["PS2INTC"] = true
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--MACHINES["IOPSIO2"] = true
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--MACHINES["IOPTIMER"] = true
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MACHINES["AIC565"] = true
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MACHINES["AIC580"] = true
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MACHINES["AIC6250"] = true
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MACHINES["VRENDER0"] = true
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@ -720,6 +720,7 @@ MACHINES["IOPSIO2"] = true
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MACHINES["IOPTIMER"] = true
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MACHINES["Z8038"] = true
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MACHINES["AIC565"] = true
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MACHINES["AIC580"] = true
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MACHINES["AIC6250"] = true
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MACHINES["DC7085"] = true
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MACHINES["I82357"] = true
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@ -14,6 +14,7 @@
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#include "bus/nscsi/devices.h"
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#include "cpu/i8085/i8085.h"
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#include "machine/aic580.h"
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#include "machine/gen_latch.h"
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#include "machine/nscsi_bus.h"
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@ -29,10 +30,6 @@ aha154x_device::aha154x_device(const machine_config &mconfig, device_type type,
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, m_scsic(*this, "scsi:7:scsic")
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, m_fdc(*this, "fdc")
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, m_bios(*this, "bios")
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, m_fifo_data(*this, "fifo_data")
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, m_fifo_read_index(0)
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, m_fifo_write_index(0)
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, m_dma_mode(0)
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{
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}
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@ -49,85 +46,17 @@ aha1542b_device::aha1542b_device(const machine_config &mconfig, const char *tag,
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void aha154x_device::device_start()
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{
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save_item(NAME(m_fifo_read_index));
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save_item(NAME(m_fifo_write_index));
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save_item(NAME(m_dma_mode));
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}
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void aha154x_device::device_reset()
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{
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m_fifo_read_index = 0;
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m_fifo_write_index = 0;
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m_dma_mode = 0;
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}
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void aha154x_device::transfer_speed_w(u8 data)
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{
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const unsigned div = BIT(data, 3) ? (data & 3) + 5 : 4;
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logerror("Transfer speed = %.2f MB/s\n", 20.0 * 2 / div);
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}
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void aha154x_device::dma_mode_w(u8 data)
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{
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m_dma_mode = data;
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}
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void aha154x_device::bus_on_time_w(u8 data)
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{
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logerror("Bus on time = %d microseconds\n", data & 0x0f);
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}
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void aha154x_device::bus_off_time_w(u8 data)
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{
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logerror("Bus off time = %d microseconds\n", std::max(1, (data & 0x0f) * 4));
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}
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u8 aha154x_device::fifo_data_r()
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{
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const u8 data = m_fifo_data[m_fifo_read_index];
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if (!machine().side_effects_disabled())
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m_fifo_read_index = (m_fifo_read_index + 1) % 10;
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return data;
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}
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void aha154x_device::fifo_data_w(u8 data)
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{
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m_fifo_data[m_fifo_write_index] = data;
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if (!machine().side_effects_disabled())
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m_fifo_write_index = (m_fifo_write_index + 1) % 10;
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}
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WRITE_LINE_MEMBER(aha154x_device::aic_breq_w)
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{
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if (state)
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{
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if (m_dma_mode == 0x80)
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{
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m_fifo_data[m_fifo_write_index] = m_scsic->dma_r();
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m_fifo_write_index = (m_fifo_write_index + 1) % 10;
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m_scsic->back_w(0);
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}
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else if (m_dma_mode == 0x90)
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{
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m_scsic->dma_w(m_fifo_data[m_fifo_read_index]);
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m_fifo_read_index = (m_fifo_read_index + 1) % 10;
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m_scsic->back_w(0);
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}
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else
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logerror("AIC-6250 BREQ (DMA mode %02X)\n", m_dma_mode);
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}
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}
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void aha154x_device::i8085_base_map(address_map &map)
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{
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map(0x0000, 0x3fff).rom().region("mcode", 0);
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map(0x8000, 0x800f).m(m_scsic, FUNC(aic6250_device::map));
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map(0xc080, 0xc080).w(FUNC(aha154x_device::transfer_speed_w));
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map(0xc082, 0xc082).w(FUNC(aha154x_device::dma_mode_w));
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map(0xc08c, 0xc08c).w(FUNC(aha154x_device::bus_on_time_w));
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map(0xc08d, 0xc08d).w(FUNC(aha154x_device::bus_off_time_w));
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map(0xc0ac, 0xc0ac).rw(FUNC(aha154x_device::fifo_data_r), FUNC(aha154x_device::fifo_data_w));
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map(0xc0c0, 0xc0c9).ram().share("fifo_data");
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map(0xc000, 0xc0ff).m("dmaaic", FUNC(aic580_device::mpu_map));
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map(0xe000, 0xe7ff).ram();
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}
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@ -452,9 +381,9 @@ ioport_constructor aha1542b_device::device_input_ports() const
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void aha154x_device::scsic_config(device_t *device)
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{
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device->set_clock(20'000'000);
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device->set_clock(20_MHz_XTAL);
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downcast<aic6250_device &>(*device).int_cb().set_inputline("^^localcpu", I8085_RST65_LINE);
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downcast<aic6250_device &>(*device).breq_cb().set("^^", FUNC(aha154x_device::aic_breq_w));
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downcast<aic6250_device &>(*device).breq_cb().set("^^dmaaic", FUNC(aic580_device::breq_w));
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downcast<aic6250_device &>(*device).port_a_r_cb().set_ioport("^^SETUP");
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downcast<aic6250_device &>(*device).port_b_r_cb().set_ioport("^^CONFIG");
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}
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@ -471,11 +400,16 @@ void aha154x_device::scsi_add(machine_config &config)
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NSCSI_CONNECTOR(config, "scsi:6", default_scsi_devices, nullptr);
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NSCSI_CONNECTOR(config, "scsi:7").option_set("scsic", AIC6250)
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.machine_config([this] (device_t *device) { scsic_config(device); });
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aic580_device &dmaaic(AIC580(config, "dmaaic", 20_MHz_XTAL));
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dmaaic.bdin_callback().set(m_scsic, FUNC(aic6250_device::dma_r));
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dmaaic.bdout_callback().set(m_scsic, FUNC(aic6250_device::dma_w));
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dmaaic.back_callback().set(m_scsic, FUNC(aic6250_device::back_w));
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}
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void aha1542a_device::device_add_mconfig(machine_config &config)
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{
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i8085a_cpu_device &localcpu(I8085A(config, m_localcpu, 10'000'000));
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i8085a_cpu_device &localcpu(I8085A(config, m_localcpu, 20_MHz_XTAL / 2));
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localcpu.set_addrmap(AS_PROGRAM, &aha1542a_device::i8085_map);
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generic_latch_8_device &fromhost(GENERIC_LATCH_8(config, "fromhost"));
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@ -490,7 +424,7 @@ void aha1542a_device::device_add_mconfig(machine_config &config)
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void aha1542b_device::device_add_mconfig(machine_config &config)
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{
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i8085a_cpu_device &localcpu(I8085A(config, m_localcpu, 10'000'000));
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i8085a_cpu_device &localcpu(I8085A(config, m_localcpu, 20_MHz_XTAL / 2));
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localcpu.set_addrmap(AS_PROGRAM, &aha1542b_device::i8085_map);
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AIC565(config, m_busaic);
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@ -24,14 +24,6 @@ protected:
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virtual void device_start() override;
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virtual void device_reset() override;
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void transfer_speed_w(u8 data);
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void dma_mode_w(u8 data);
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void bus_on_time_w(u8 data);
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void bus_off_time_w(u8 data);
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u8 fifo_data_r();
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void fifo_data_w(u8 data);
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DECLARE_WRITE_LINE_MEMBER(aic_breq_w);
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void i8085_base_map(address_map &map);
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void scsi_add(machine_config &config);
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void scsic_config(device_t *device);
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@ -40,11 +32,6 @@ protected:
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required_device<aic6250_device> m_scsic;
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required_device<upd765_family_device> m_fdc;
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required_region_ptr<u8> m_bios;
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required_shared_ptr<u8> m_fifo_data;
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u8 m_fifo_read_index;
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u8 m_fifo_write_index;
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u8 m_dma_mode;
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};
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class aha1542a_device : public aha154x_device
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378
src/devices/machine/aic580.cpp
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378
src/devices/machine/aic580.cpp
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@ -0,0 +1,378 @@
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// license:BSD-3-Clause
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// copyright-holders:AJR
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/***************************************************************************
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Adaptec AIC-580
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This 84-pin PLCC ASIC provides 16-bit DMA bus mastering capabilities
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for the AIC-1540A/1542A and AIC-1540B/1542B PC/AT SCSI host adapters
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and the AIC-1640 Micro Channel SCSI host adapter.
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No documentation for this IC has been found. It might function somewhat
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similarly to the AIC-560, which is also poorly documented.
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***************************************************************************/
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#include "emu.h"
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#include "aic580.h"
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//**************************************************************************
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// GLOBAL VARIABLES
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//**************************************************************************
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// device type definition
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DEFINE_DEVICE_TYPE(AIC580, aic580_device, "aic580", "AIC-580 DMA Bus Master")
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//**************************************************************************
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// DEVICE IMPLEMENTATION
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//**************************************************************************
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//-------------------------------------------------
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// aic580_device - constructor
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//-------------------------------------------------
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aic580_device::aic580_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
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: device_t(mconfig, AIC580, tag, owner, clock)
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, m_bdin_callback(*this)
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, m_bdout_callback(*this)
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, m_back_callback(*this)
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, m_sread_callback(*this)
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, m_swrite_callback(*this)
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, m_dma_mode(0)
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, m_channel_addr{0}
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, m_fifo_read_index(0)
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, m_fifo_write_index(0)
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, m_fifo_data{0}
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{
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}
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//-------------------------------------------------
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// device_resolve_objects - resolve objects that
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// may be needed for other devices to set
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// initial conditions at start time
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//-------------------------------------------------
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void aic580_device::device_resolve_objects()
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{
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// resolve callbacks
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m_bdin_callback.resolve_safe(0);
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m_bdout_callback.resolve_safe();
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m_back_callback.resolve_safe();
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m_sread_callback.resolve_safe(0);
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m_swrite_callback.resolve_safe();
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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//-------------------------------------------------
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void aic580_device::device_start()
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{
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// register state
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save_item(NAME(m_dma_mode));
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save_item(NAME(m_channel_addr));
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save_item(NAME(m_fifo_read_index));
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save_item(NAME(m_fifo_write_index));
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save_item(NAME(m_fifo_data));
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}
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//-------------------------------------------------
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// device_reset - device-specific reset
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//-------------------------------------------------
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void aic580_device::device_reset()
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{
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m_fifo_read_index = 0;
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m_fifo_write_index = 0;
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m_dma_mode = 0;
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}
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//-------------------------------------------------
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// breq_w - handle transfer requests for port B
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//-------------------------------------------------
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WRITE_LINE_MEMBER(aic580_device::breq_w)
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{
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if (state)
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{
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if (m_dma_mode == 0x80)
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{
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m_fifo_data[m_fifo_write_index] = m_bdin_callback();
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m_fifo_write_index = (m_fifo_write_index + 1) & 15;
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m_back_callback(0);
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}
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else if (m_dma_mode == 0x90)
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{
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m_bdout_callback(m_fifo_data[m_fifo_read_index]);
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m_fifo_read_index = (m_fifo_read_index + 1) & 15;
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m_back_callback(0);
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}
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else
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logerror("BREQ with unemulated DMA mode %02X\n", m_dma_mode);
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}
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}
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//**************************************************************************
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// REGISTER HANDLERS
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//**************************************************************************
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//-------------------------------------------------
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// r80_r - local read from register 80h
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//-------------------------------------------------
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u8 aic580_device::r80_r()
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{
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if (!machine().side_effects_disabled())
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logerror("%s: Read from register 80h\n", machine().describe_context());
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return 0;
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}
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//-------------------------------------------------
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// transfer_speed_w - local write to register 80h
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//-------------------------------------------------
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void aic580_device::transfer_speed_w(u8 data)
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{
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const unsigned div = BIT(data, 3) ? (data & 3) + 5 : 4;
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logerror("Transfer speed = %.2f MB/s\n", clock() * 2.0E-6 / div);
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}
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//-------------------------------------------------
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// dma_mode_w - local write to register 82h
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//-------------------------------------------------
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void aic580_device::dma_mode_w(u8 data)
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{
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m_dma_mode = data;
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}
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//-------------------------------------------------
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// r83_w - local write to register 83h
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//-------------------------------------------------
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void aic580_device::r83_w(u8 data)
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{
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logerror("%s: Write %02Xh to register 83h\n", machine().describe_context(), data);
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}
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//-------------------------------------------------
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// r86_w - local write to register 86h
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//-------------------------------------------------
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void aic580_device::r86_w(u8 data)
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{
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logerror("%s: Write %02Xh to register 86h\n", machine().describe_context(), data);
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}
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//-------------------------------------------------
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// r88_r - local read from register 88h
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//-------------------------------------------------
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u8 aic580_device::r88_r()
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{
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if (!machine().side_effects_disabled())
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logerror("%s: Read from register 88h\n", machine().describe_context());
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return 0;
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}
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//-------------------------------------------------
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// r88_w - local write to register 88h
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//-------------------------------------------------
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void aic580_device::r88_w(u8 data)
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{
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logerror("%s: Write %02Xh to register 88h\n", machine().describe_context(), data);
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}
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//-------------------------------------------------
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// r8a_w - local write to register 8Ah
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//-------------------------------------------------
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void aic580_device::r8a_w(u8 data)
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{
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logerror("%s: Write %02Xh to register 8Ah\n", machine().describe_context(), data);
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}
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//-------------------------------------------------
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// r8b_w - local write to register 8Bh
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//-------------------------------------------------
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void aic580_device::r8b_w(u8 data)
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{
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logerror("%s: Write %02Xh to register 8Bh\n", machine().describe_context(), data);
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}
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//-------------------------------------------------
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// bus_on_time_w - local write to register 8Ch
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//-------------------------------------------------
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void aic580_device::bus_on_time_w(u8 data)
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{
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logerror("Bus on time = %d microseconds\n", data & 0x0f);
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}
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//-------------------------------------------------
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// bus_off_time_w - local write to register 8Dh
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//-------------------------------------------------
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void aic580_device::bus_off_time_w(u8 data)
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{
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logerror("Bus off time = %d microseconds\n", std::max(1, (data & 0x0f) * 4));
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}
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//-------------------------------------------------
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// ch_addrl_w - set bits 7:0 of buffer address
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// for channel 1 or 2
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//-------------------------------------------------
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template<int Channel>
|
||||
void aic580_device::ch_addrl_w(u8 data)
|
||||
{
|
||||
m_channel_addr[Channel] = (m_channel_addr[Channel] & 0xffff00) | data;
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// ch_addrm_w - set bits 15:8 of buffer address
|
||||
// for channel 1 or 2
|
||||
//-------------------------------------------------
|
||||
|
||||
template<int Channel>
|
||||
void aic580_device::ch_addrm_w(u8 data)
|
||||
{
|
||||
m_channel_addr[Channel] = (m_channel_addr[Channel] & 0xff00ff) | u32(data) << 8;
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// ch_addrh_w - set bits 23:16 of buffer address
|
||||
// for channel 1 or 2
|
||||
//-------------------------------------------------
|
||||
|
||||
template<int Channel>
|
||||
void aic580_device::ch_addrh_w(u8 data)
|
||||
{
|
||||
m_channel_addr[Channel] = (m_channel_addr[Channel] & 0x00ffff) | u32(data) << 16;
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// ra2_w - local write to register A2h
|
||||
//-------------------------------------------------
|
||||
|
||||
void aic580_device::ra2_w(u8 data)
|
||||
{
|
||||
logerror("%s: Write %02Xh to register A2h\n", machine().describe_context(), data);
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// ra3_w - local write to register A3h
|
||||
//-------------------------------------------------
|
||||
|
||||
void aic580_device::ra3_w(u8 data)
|
||||
{
|
||||
logerror("%s: Write %02Xh to register A3h\n", machine().describe_context(), data);
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// ra4_w - local write to register A4h
|
||||
//-------------------------------------------------
|
||||
|
||||
void aic580_device::ra4_w(u8 data)
|
||||
{
|
||||
logerror("%s: Write %02Xh to register A4h\n", machine().describe_context(), data);
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// fifo_data_r - local read from register ACh
|
||||
//-------------------------------------------------
|
||||
|
||||
u8 aic580_device::fifo_data_r()
|
||||
{
|
||||
const u8 data = m_fifo_data[m_fifo_read_index];
|
||||
if (!machine().side_effects_disabled())
|
||||
m_fifo_read_index = (m_fifo_read_index + 1) & 15;
|
||||
return data;
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// fifo_data_w - local write to register ACh
|
||||
//-------------------------------------------------
|
||||
|
||||
void aic580_device::fifo_data_w(u8 data)
|
||||
{
|
||||
m_fifo_data[m_fifo_write_index] = data;
|
||||
if (!machine().side_effects_disabled())
|
||||
m_fifo_write_index = (m_fifo_write_index + 1) & 15;
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// buffer_r - local read from registers C0h–CFh
|
||||
//-------------------------------------------------
|
||||
|
||||
u8 aic580_device::buffer_r(offs_t offset)
|
||||
{
|
||||
return m_fifo_data[offset];
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// buffer_w - local write to registers C0h–CFh
|
||||
//-------------------------------------------------
|
||||
|
||||
void aic580_device::buffer_w(offs_t offset, u8 data)
|
||||
{
|
||||
m_fifo_data[offset] = data;
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// mpu_map - address map for local microprocessor
|
||||
//-------------------------------------------------
|
||||
|
||||
void aic580_device::mpu_map(address_map &map)
|
||||
{
|
||||
map(0x80, 0x80).rw(FUNC(aic580_device::r80_r), FUNC(aic580_device::transfer_speed_w));
|
||||
map(0x82, 0x82).w(FUNC(aic580_device::dma_mode_w));
|
||||
map(0x83, 0x83).w(FUNC(aic580_device::r83_w));
|
||||
map(0x86, 0x86).w(FUNC(aic580_device::r86_w));
|
||||
map(0x88, 0x88).rw(FUNC(aic580_device::r88_r), FUNC(aic580_device::r88_w));
|
||||
map(0x8a, 0x8a).w(FUNC(aic580_device::r8a_w));
|
||||
map(0x8b, 0x8b).w(FUNC(aic580_device::r8b_w));
|
||||
map(0x8c, 0x8c).w(FUNC(aic580_device::bus_on_time_w));
|
||||
map(0x8d, 0x8d).w(FUNC(aic580_device::bus_off_time_w));
|
||||
map(0x98, 0x98).w(FUNC(aic580_device::ch_addrl_w<0>));
|
||||
map(0x99, 0x99).w(FUNC(aic580_device::ch_addrm_w<0>));
|
||||
map(0x9a, 0x9a).w(FUNC(aic580_device::ch_addrh_w<0>));
|
||||
map(0x9c, 0x9c).w(FUNC(aic580_device::ch_addrl_w<1>));
|
||||
map(0x9d, 0x9d).w(FUNC(aic580_device::ch_addrm_w<1>));
|
||||
map(0x9e, 0x9e).w(FUNC(aic580_device::ch_addrh_w<1>));
|
||||
map(0xa2, 0xa2).w(FUNC(aic580_device::ra2_w));
|
||||
map(0xa3, 0xa3).w(FUNC(aic580_device::ra3_w));
|
||||
map(0xa4, 0xa4).w(FUNC(aic580_device::ra4_w));
|
||||
map(0xac, 0xac).rw(FUNC(aic580_device::fifo_data_r), FUNC(aic580_device::fifo_data_w));
|
||||
map(0xc0, 0xcf).rw(FUNC(aic580_device::buffer_r), FUNC(aic580_device::buffer_w));
|
||||
}
|
||||
87
src/devices/machine/aic580.h
Normal file
87
src/devices/machine/aic580.h
Normal file
@ -0,0 +1,87 @@
|
||||
// license:BSD-3-Clause
|
||||
// copyright-holders:AJR
|
||||
/**********************************************************************
|
||||
|
||||
Adaptec AIC-580
|
||||
|
||||
**********************************************************************/
|
||||
|
||||
#ifndef MAME_MACHINE_AIC580_H
|
||||
#define MAME_MACHINE_AIC580_H
|
||||
|
||||
#pragma once
|
||||
|
||||
//**************************************************************************
|
||||
// TYPE DEFINITIONS
|
||||
//**************************************************************************
|
||||
|
||||
// ======================> aic580_device
|
||||
|
||||
class aic580_device : public device_t
|
||||
{
|
||||
public:
|
||||
// construction/destruction
|
||||
aic580_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
|
||||
|
||||
// callback configuration
|
||||
auto bdin_callback() { return m_bdin_callback.bind(); }
|
||||
auto bdout_callback() { return m_bdout_callback.bind(); }
|
||||
auto back_callback() { return m_back_callback.bind(); }
|
||||
auto sread_callback() { return m_sread_callback.bind(); }
|
||||
auto swrite_callback() { return m_swrite_callback.bind(); }
|
||||
|
||||
// microprocessor interface
|
||||
void mpu_map(address_map &map);
|
||||
|
||||
// port B DMA interface
|
||||
DECLARE_WRITE_LINE_MEMBER(breq_w);
|
||||
|
||||
protected:
|
||||
// device-specific overrides
|
||||
virtual void device_resolve_objects() override;
|
||||
virtual void device_start() override;
|
||||
virtual void device_reset() override;
|
||||
|
||||
private:
|
||||
// register handlers
|
||||
u8 r80_r();
|
||||
void transfer_speed_w(u8 data);
|
||||
void dma_mode_w(u8 data);
|
||||
void r83_w(u8 data);
|
||||
void r86_w(u8 data);
|
||||
u8 r88_r();
|
||||
void r88_w(u8 data);
|
||||
void r8a_w(u8 data);
|
||||
void r8b_w(u8 data);
|
||||
void bus_on_time_w(u8 data);
|
||||
void bus_off_time_w(u8 data);
|
||||
template<int Channel> void ch_addrl_w(u8 data);
|
||||
template<int Channel> void ch_addrm_w(u8 data);
|
||||
template<int Channel> void ch_addrh_w(u8 data);
|
||||
void ra2_w(u8 data);
|
||||
void ra3_w(u8 data);
|
||||
void ra4_w(u8 data);
|
||||
u8 fifo_data_r();
|
||||
void fifo_data_w(u8 data);
|
||||
u8 buffer_r(offs_t offset);
|
||||
void buffer_w(offs_t offset, u8 data);
|
||||
|
||||
// callback objects
|
||||
devcb_read8 m_bdin_callback;
|
||||
devcb_write8 m_bdout_callback;
|
||||
devcb_write_line m_back_callback;
|
||||
devcb_read16 m_sread_callback;
|
||||
devcb_write16 m_swrite_callback;
|
||||
|
||||
// internal state
|
||||
u8 m_dma_mode;
|
||||
u32 m_channel_addr[2];
|
||||
u8 m_fifo_read_index;
|
||||
u8 m_fifo_write_index;
|
||||
u8 m_fifo_data[16];
|
||||
};
|
||||
|
||||
// device type declaration
|
||||
DECLARE_DEVICE_TYPE(AIC580, aic580_device)
|
||||
|
||||
#endif // MAME_MACHINE_AIC580_H
|
||||
Loading…
Reference in New Issue
Block a user