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bus/isa/tekram_dc820.cpp: Add serial EEPROM and a few stub handlers (nw)

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This commit is contained in:
AJR 2019-04-27 20:45:37 -04:00
parent 03ec11e274
commit a2460f12d3
2 changed files with 72 additions and 5 deletions
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65
src/devices/bus/isa/tekram_dc820.cpp
View File

@ -17,7 +17,6 @@
#include "tekram_dc820.h"
#include "cpu/i86/i186.h"
//#include "machine/eepromser.h"
#include "machine/i82355.h"
#include "machine/ncr5390.h"
#include "machine/nscsi_bus.h"
@ -32,6 +31,7 @@ tekram_eisa_scsi_device::tekram_eisa_scsi_device(const machine_config &mconfig,
: device_t(mconfig, type, tag, owner, clock)
, device_isa16_card_interface(mconfig, *this)
, m_mpu(*this, "mpu")
, m_eeprom(*this, "eeprom")
, m_fdc(*this, "fdc")
, m_bios(*this, "bios")
{
@ -61,27 +61,82 @@ void tekram_eisa_scsi_device::device_start()
{
}
u8 tekram_eisa_scsi_device::status_r()
{
return m_eeprom->do_read() << 3;
}
void tekram_eisa_scsi_device::mask_w(u8 data)
{
logerror("%s: Mask register(?) = %02X\n", machine().describe_context(), data);
}
u8 tekram_eisa_scsi_device::unknown_r()
{
if (!machine().side_effects_disabled())
logerror("%s: Unknown read (reset something?)\n", machine().describe_context());
return 0;
}
void tekram_eisa_scsi_device::eeprom_w(u8 data)
{
m_eeprom->di_write(BIT(data, 0));
m_eeprom->cs_write(BIT(data, 2));
m_eeprom->clk_write(BIT(data, 5));
}
void tekram_eisa_scsi_device::mpu_map(address_map &map)
{
map(0x00000, 0x0ffff).ram();
map(0x10040, 0x1005f).m("scsi:7:scsic", FUNC(ncr53cf94_device::map)).umask16(0xff00);
map(0x10069, 0x10069).r(FUNC(tekram_eisa_scsi_device::status_r));
map(0x1006c, 0x1006c).w(FUNC(tekram_eisa_scsi_device::mask_w));
map(0x1006d, 0x1006d).w(FUNC(tekram_eisa_scsi_device::eeprom_w));
map(0x1006f, 0x1006f).r(FUNC(tekram_eisa_scsi_device::unknown_r));
map(0x10080, 0x10085).rw("bmic", FUNC(i82355_device::local_r), FUNC(i82355_device::local_w)).umask16(0x00ff);
map(0xf0000, 0xfffff).rom().region("firmware", 0);
}
void tekram_dc320b_device::eeprom_w(u8 data)
{
m_eeprom->di_write(BIT(data, 1));
m_eeprom->cs_write(BIT(data, 2));
m_eeprom->clk_write(BIT(data, 5));
}
u8 tekram_dc320b_device::eeprom_r()
{
return m_eeprom->do_read() << 4;
}
void tekram_dc320b_device::mpu_map(address_map &map)
{
map(0x00000, 0x03fff).ram();
map(0x08000, 0x0801f).m("scsi:7:scsic", FUNC(ncr53cf94_device::map)).umask16(0x00ff);
map(0x08001, 0x08001).r(FUNC(tekram_dc320b_device::unknown_r));
map(0x08080, 0x08085).rw("bmic", FUNC(i82355_device::local_r), FUNC(i82355_device::local_w)).umask16(0x00ff);
map(0x0810a, 0x0810a).w(FUNC(tekram_dc320b_device::eeprom_w));
map(0x0810c, 0x0810c).w(FUNC(tekram_dc320b_device::mask_w));
map(0x08180, 0x08180).r(FUNC(tekram_dc320b_device::eeprom_r));
map(0xf0000, 0xfffff).rom().region("firmware", 0);
}
void tekram_dc820_device::eeprom_w(u8 data)
{
m_eeprom->di_write(BIT(data, 1));
m_eeprom->cs_write(BIT(data, 2));
m_eeprom->clk_write(BIT(data, 5));
}
void tekram_dc820_device::mpu_map(address_map &map)
{
map(0x00000, 0x0ffff).ram();
map(0x10000, 0x1001f).m("scsi:7:scsic", FUNC(ncr53cf94_device::map)).umask16(0x00ff);
map(0x10080, 0x10085).rw("bmic", FUNC(i82355_device::local_r), FUNC(i82355_device::local_w)).umask16(0x00ff);
map(0x1010b, 0x1010b).w(FUNC(tekram_dc820_device::eeprom_w));
map(0x1010d, 0x1010d).w(FUNC(tekram_dc820_device::mask_w));
map(0x10200, 0x10200).r(FUNC(tekram_dc820_device::unknown_r));
map(0x10283, 0x10283).r(FUNC(tekram_dc820_device::status_r));
map(0xf0000, 0xfffff).rom().region("firmware", 0);
}
@ -116,7 +171,7 @@ void tekram_dc320b_device::device_add_mconfig(machine_config &config)
I80186(config, m_mpu, 25'000'000); // verified for DC-320, but not DC-320B
m_mpu->set_addrmap(AS_PROGRAM, &tekram_dc320b_device::mpu_map);
//EEPROM_93C46_16BIT(config, m_eeprom);
EEPROM_93C46_16BIT(config, m_eeprom);
i82355_device &bmic(I82355(config, "bmic", 0));
bmic.lint_callback().set(m_mpu, FUNC(i80186_cpu_device::int2_w));
@ -131,7 +186,7 @@ void tekram_dc320e_device::device_add_mconfig(machine_config &config)
I80186(config, m_mpu, 32'000'000); // clock guessed to be same as DC-820B due to identical firmware
m_mpu->set_addrmap(AS_PROGRAM, &tekram_dc320e_device::mpu_map);
//EEPROM_93C46_16BIT(config, m_eeprom);
EEPROM_93C46_16BIT(config, m_eeprom);
i82355_device &bmic(I82355(config, "bmic", 0));
bmic.lint_callback().set(m_mpu, FUNC(i80186_cpu_device::int2_w));
@ -146,7 +201,7 @@ void tekram_dc820_device::device_add_mconfig(machine_config &config)
I80186(config, m_mpu, 32_MHz_XTAL); // N80C186-16
m_mpu->set_addrmap(AS_PROGRAM, &tekram_dc820_device::mpu_map);
//EEPROM_93C46_16BIT(config, m_eeprom);
EEPROM_93C46_16BIT(config, m_eeprom);
i82355_device &bmic(I82355(config, "bmic", 0));
bmic.lint_callback().set(m_mpu, FUNC(i80186_cpu_device::int2_w));
@ -161,7 +216,7 @@ void tekram_dc820b_device::device_add_mconfig(machine_config &config)
I80186(config, m_mpu, 32_MHz_XTAL); // N80186-16
m_mpu->set_addrmap(AS_PROGRAM, &tekram_dc820b_device::mpu_map);
//EEPROM_93C46_16BIT(config, m_eeprom);
EEPROM_93C46_16BIT(config, m_eeprom);
i82355_device &bmic(I82355(config, "bmic", 0));
bmic.lint_callback().set(m_mpu, FUNC(i80186_cpu_device::int2_w));

12
src/devices/bus/isa/tekram_dc820.h
View File

@ -12,6 +12,7 @@
#pragma once
#include "isa.h"
#include "machine/eepromser.h"
#include "machine/upd765.h"
class tekram_eisa_scsi_device : public device_t, public device_isa16_card_interface
@ -24,11 +25,17 @@ protected:
virtual void device_start() override;
u8 status_r();
void mask_w(u8 data);
u8 unknown_r();
void eeprom_w(u8 data);
void mpu_map(address_map &map);
void scsic_config(device_t *device);
void scsi_add(machine_config &config);
required_device<cpu_device> m_mpu;
required_device<eeprom_serial_93cxx_device> m_eeprom;
required_device<upd765_family_device> m_fdc;
required_region_ptr<u8> m_bios;
};
@ -43,6 +50,9 @@ protected:
virtual const tiny_rom_entry *device_rom_region() const override;
private:
void eeprom_w(u8 data);
u8 eeprom_r();
void mpu_map(address_map &map);
};
@ -66,6 +76,8 @@ protected:
virtual const tiny_rom_entry *device_rom_region() const override;
private:
void eeprom_w(u8 data);
void mpu_map(address_map &map);
};