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bus/archimedes/podule/rom.cpp: Added ROM podule with discless bootstrap.

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This commit is contained in:
Nigel Barnes 2024-02-15 23:32:24 +00:00
parent 8a4dac5647
commit 70e3bc24e7
3 changed files with 56 additions and 14 deletions
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68
src/devices/bus/archimedes/podule/rom.cpp
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@ -30,7 +30,9 @@ public:
static constexpr feature_type unemulated_features() { return feature::ROM; }
protected:
// device-level overrides
arc_rom_aka05_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock);
// device_t overrides
virtual void device_start() override;
virtual void device_reset() override;
@ -43,7 +45,7 @@ protected:
private:
required_memory_region m_podule_rom;
required_device_array<generic_slot_device, 7> m_rom;
required_device_array<generic_slot_device, 8> m_rom;
u8 rom_r(offs_t offset);
void rom_w(offs_t offset, u8 data);
@ -52,6 +54,19 @@ private:
u8 m_rom_page;
};
// ======================> arc_rom_r225_device
class arc_rom_r225_device : public arc_rom_aka05_device
{
public:
// construction/destruction
arc_rom_r225_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
protected:
// optional information overrides
virtual const tiny_rom_entry *device_rom_region() const override;
};
void arc_rom_aka05_device::ioc_map(address_map &map)
{
@ -72,11 +87,22 @@ ROM_START( rom_aka05 )
ROMX_LOAD("0276,221-02_manager.bin", 0x0000, 0x4000, CRC(23ec4ddb) SHA1(e699157895433010b1ea110c78fbc80a4bc58f09), ROM_BIOS(0))
ROM_END
ROM_START( rom_r225 )
ROM_REGION(0x40000, "podule_rom", ROMREGION_ERASEFF)
ROM_LOAD("0270,751-01_r225_boot_rom1.bin", 0x00000, 0x20000, CRC(69117329) SHA1(3ce1a3630bc5d3475216cc403df348f55cad681a))
ROM_LOAD("0270,752-01_r225_boot_rom2.bin", 0x20000, 0x20000, CRC(2756ee10) SHA1(bb0825670bde59c80a73895141b2d8ad6ea87a2f))
ROM_END
const tiny_rom_entry *arc_rom_aka05_device::device_rom_region() const
{
return ROM_NAME( rom_aka05 );
}
const tiny_rom_entry *arc_rom_r225_device::device_rom_region() const
{
return ROM_NAME( rom_r225 );
}
void arc_ram_devices(device_slot_interface &device)
{
@ -89,16 +115,17 @@ void arc_ram_devices(device_slot_interface &device)
void arc_rom_aka05_device::device_add_mconfig(machine_config &config)
{
// rom sockets 5 x 128K
// rom sockets 6 x 128K
GENERIC_SOCKET(config, m_rom[0], generic_plain_slot, "bbc_rom", "bin,rom");
GENERIC_SOCKET(config, m_rom[1], generic_plain_slot, "bbc_rom", "bin,rom");
GENERIC_SOCKET(config, m_rom[2], generic_plain_slot, "bbc_rom", "bin,rom");
GENERIC_SOCKET(config, m_rom[3], generic_plain_slot, "bbc_rom", "bin,rom");
GENERIC_SOCKET(config, m_rom[4], generic_plain_slot, "bbc_rom", "bin,rom");
GENERIC_SOCKET(config, m_rom[5], generic_plain_slot, "bbc_rom", "bin,rom");
// ram sockets 2 x 32K
GENERIC_SOCKET(config, m_rom[5], arc_ram_devices, "bbc_rom", "bin,rom").set_user_loadable(false);
GENERIC_SOCKET(config, m_rom[6], arc_ram_devices, "bbc_rom", "bin,rom").set_user_loadable(false);
GENERIC_SOCKET(config, m_rom[7], arc_ram_devices, "bbc_rom", "bin,rom").set_user_loadable(false);
SOFTWARE_LIST(config, "rom_ls").set_original("bbc_rom").set_filter("B");
}
@ -112,8 +139,8 @@ void arc_rom_aka05_device::device_add_mconfig(machine_config &config)
// arc_rom_aka05_device - constructor
//-------------------------------------------------
arc_rom_aka05_device::arc_rom_aka05_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: device_t(mconfig, ARC_ROM_AKA05, tag, owner, clock)
arc_rom_aka05_device::arc_rom_aka05_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock)
: device_t(mconfig, type, tag, owner, clock)
, device_archimedes_podule_interface(mconfig, *this)
, m_podule_rom(*this, "podule_rom")
, m_rom(*this, "rom%u", 1U)
@ -122,6 +149,16 @@ arc_rom_aka05_device::arc_rom_aka05_device(const machine_config &mconfig, const
{
}
arc_rom_aka05_device::arc_rom_aka05_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: arc_rom_aka05_device(mconfig, ARC_ROM_AKA05, tag, owner, clock)
{
}
arc_rom_r225_device::arc_rom_r225_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: arc_rom_aka05_device(mconfig, ARC_ROM_R225, tag, owner, clock)
{
}
//-------------------------------------------------
// device_start - device-specific startup
@ -152,19 +189,19 @@ void arc_rom_aka05_device::device_reset()
u8 arc_rom_aka05_device::rom_r(offs_t offset)
{
u8 data = 0xff;
u32 const addr = offset | (m_rom_page << 11);
switch (m_rom_select)
{
case 0:
data = m_podule_rom->base()[offset | (m_rom_page << 11)];
break;
case 1: case 2: case 3: case 4: case 5:
data = m_rom[m_rom_select - 1]->read_rom(offset | (m_rom_page << 11));
case 0: case 1: case 2: case 3: case 4: case 5:
if ((m_rom_select * 0x20000) < m_podule_rom->bytes())
data = m_podule_rom->base()[(m_rom_select * 0x20000) | addr];
else
data = m_rom[m_rom_select]->read_rom(addr);
break;
case 6: case 7:
data = m_rom[m_rom_select - 1]->read_ram(offset | (m_rom_page << 11));
data = m_rom[m_rom_select]->read_ram(addr);
break;
}
@ -173,10 +210,12 @@ u8 arc_rom_aka05_device::rom_r(offs_t offset)
void arc_rom_aka05_device::rom_w(offs_t offset, u8 data)
{
u32 const addr = offset | (m_rom_page << 11);
switch (m_rom_select)
{
case 6: case 7:
m_rom[m_rom_select - 1]->write_ram(offset | (m_rom_page << 11), data);
m_rom[m_rom_select]->write_ram(addr, data);
break;
}
}
@ -189,3 +228,4 @@ void arc_rom_aka05_device::rom_w(offs_t offset, u8 data)
//**************************************************************************
DEFINE_DEVICE_TYPE_PRIVATE(ARC_ROM_AKA05, device_archimedes_podule_interface, arc_rom_aka05_device, "arc_rom_aka05", "Acorn AKA05 ROM Podule")
DEFINE_DEVICE_TYPE_PRIVATE(ARC_ROM_R225, device_archimedes_podule_interface, arc_rom_r225_device, "arc_rom_r225", "Acorn AKA05 ROM (with DiscLess Bootstrap support)")

1
src/devices/bus/archimedes/podule/rom.h
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@ -15,5 +15,6 @@
// device type definition
DECLARE_DEVICE_TYPE(ARC_ROM_AKA05, device_archimedes_podule_interface)
DECLARE_DEVICE_TYPE(ARC_ROM_R225, device_archimedes_podule_interface)
#endif // MAME_BUS_ARCHIMEDES_PODULE_ROM_H

1
src/devices/bus/archimedes/podule/slot.cpp
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@ -339,6 +339,7 @@ void archimedes_exp_devices(device_slot_interface &device)
//device.option_add("prisma3", ARC_PRISMA3); // Millipede PRISMA-3 Podule
//device.option_add("prisma3p", ARC_PRISMA3P); // Millipede PRISMA-3 Plus Podule
device.option_add("rom_aka05", ARC_ROM_AKA05); // Acorn AKA05 ROM Podule
device.option_add("rom_r225boot", ARC_ROM_R225); // Acorn AKA05 ROM (with DiscLess Bootstrap support)
//device.option_add("rom_cc", ARC_ROM_CC); // Computer Concepts ROM/RAM Podule
device.option_add("rs423", ARC_RS423); // Intelligent Interfaces Dual RS423 Serial Interface
device.option_add("scan256", ARC_SCAN256); // Watford Electronics 256 Grey-Scale Scanner