diff options
Diffstat (limited to 'src/devices/bus/isa/dcb.cpp')
-rw-r--r-- | src/devices/bus/isa/dcb.cpp | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/devices/bus/isa/dcb.cpp b/src/devices/bus/isa/dcb.cpp new file mode 100644 index 00000000000..db5768d6758 --- /dev/null +++ b/src/devices/bus/isa/dcb.cpp @@ -0,0 +1,70 @@ +// license:BSD-3-Clause +// copyright-holders:AJR +/*************************************************************************** + + Novell Disk Coprocessor Board (DCB) + + This special SCSI host adapter, later acquired by ADIC, was designed + for use with Novell NetWare. + +***************************************************************************/ + +#include "emu.h" +#include "dcb.h" + +DEFINE_DEVICE_TYPE(NOVELL_DCB, novell_dcb_device, "novell_dcb", "Novell Disk Coprocessor Board (#738-133-001)") + +novell_dcb_device::novell_dcb_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : device_t(mconfig, NOVELL_DCB, tag, owner, clock) + , device_isa16_card_interface(mconfig, *this) + , m_localcpu(*this, "localcpu") + , m_eeprom(*this, "eeprom") +{ +} + +void novell_dcb_device::device_start() +{ +} + +void novell_dcb_device::eeprom_w(u8 data) +{ + m_eeprom->cs_write(BIT(data, 5)); + m_eeprom->clk_write(BIT(data, 6)); + m_eeprom->di_write(BIT(data, 7)); +} + +u8 novell_dcb_device::misc_r() +{ + return m_eeprom->do_read() << 7; +} + +void novell_dcb_device::mem_map(address_map &map) +{ + map(0x00000, 0x03fff).ram(); + map(0xfe000, 0xfffff).rom().region("localcpu", 0); +} + +void novell_dcb_device::io_map(address_map &map) +{ + map(0x0100, 0x0100).w(FUNC(novell_dcb_device::eeprom_w)); + map(0x0180, 0x0180).r(FUNC(novell_dcb_device::misc_r)); +} + +void novell_dcb_device::device_add_mconfig(machine_config &config) +{ + I80188(config, m_localcpu, 16_MHz_XTAL); + m_localcpu->set_addrmap(AS_PROGRAM, &novell_dcb_device::mem_map); + m_localcpu->set_addrmap(AS_IO, &novell_dcb_device::io_map); + + EEPROM_93C06_16BIT(config, m_eeprom); // NMC9306 +} + +ROM_START(novell_dcb) + ROM_REGION(0x2000, "localcpu", 0) + ROM_LOAD("817-186-001_rev_e_5800_11-04-86.bin", 0x0000, 0x2000, CRC(2e2037f4) SHA1(a13c0aab46084a0805256f1d2b8b8beaccc9e253)) +ROM_END + +const tiny_rom_entry *novell_dcb_device::device_rom_region() const +{ + return ROM_NAME(novell_dcb); +} |