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Diffstat (limited to 'src/devices/bus/bbc/internal/stlswr.cpp')
-rw-r--r--src/devices/bus/bbc/internal/stlswr.cpp192
1 files changed, 192 insertions, 0 deletions
diff --git a/src/devices/bus/bbc/internal/stlswr.cpp b/src/devices/bus/bbc/internal/stlswr.cpp
new file mode 100644
index 00000000000..f4992197453
--- /dev/null
+++ b/src/devices/bus/bbc/internal/stlswr.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Solidisk Sideways RAM
+
+ http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Solidisk_128KSWE.html
+
+**********************************************************************/
+
+
+#include "emu.h"
+#include "stlswr.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(BBC_STLSWR16, bbc_stlswr16_device, "bbc_stlswr16", "Solidisk SWR16 - 16K Sideways RAM");
+DEFINE_DEVICE_TYPE(BBC_STLSWR32, bbc_stlswr32_device, "bbc_stlswr32", "Solidisk SWR32 - 32K Sideways RAM");
+DEFINE_DEVICE_TYPE(BBC_STLSWR64, bbc_stlswr64_device, "bbc_stlswr64", "Solidisk SWR64 - 64K Sideways RAM");
+DEFINE_DEVICE_TYPE(BBC_STLSWR128, bbc_stlswr128_device, "bbc_stlswr128", "Solidisk SWR128 - 128K Sideways RAM");
+
+
+//-------------------------------------------------
+// ROM( stlswr )
+//-------------------------------------------------
+
+ROM_START(stlswr)
+ ROM_REGION(0x4000, "exp_rom", 0)
+ ROM_SYSTEM_BIOS(0, "13", "Toolkit 1.3 03/03/86")
+ ROMX_LOAD("toolkit-1.3-16k-128k-03-03-86.rom", 0x0000, 0x4000, CRC(a1745d10) SHA1(1821e74feca60b95766ead06df20f6db22e2b4bb), ROM_BIOS(0))
+ROM_END
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void bbc_stlswr16_device::device_add_mconfig(machine_config &config)
+{
+ /* TODO: romslot3 is unavailable when board is fitted */
+ //config.device_remove(":romslot3");
+ BBC_ROMSLOT16(config, m_rom[15], bbc_rom_devices, "ram").set_fixed_ram(true);
+}
+
+void bbc_stlswr32_device::device_add_mconfig(machine_config &config)
+{
+ /* TODO: romslot3 is unavailable when board is fitted */
+ //config.device_remove(":romslot3");
+ BBC_ROMSLOT16(config, m_rom[14], bbc_rom_devices, "ram").set_fixed_ram(true);
+ BBC_ROMSLOT16(config, m_rom[15], bbc_rom_devices, "ram").set_fixed_ram(true);
+}
+
+void bbc_stlswr64_device::device_add_mconfig(machine_config &config)
+{
+ /* TODO: romslot3 is unavailable when board is fitted */
+ //config.device_remove(":romslot3");
+ BBC_ROMSLOT16(config, m_rom[12], bbc_rom_devices, "ram").set_fixed_ram(true);
+ BBC_ROMSLOT16(config, m_rom[13], bbc_rom_devices, "ram").set_fixed_ram(true);
+ BBC_ROMSLOT16(config, m_rom[14], bbc_rom_devices, "ram").set_fixed_ram(true);
+ BBC_ROMSLOT16(config, m_rom[15], bbc_rom_devices, "ram").set_fixed_ram(true);
+}
+
+void bbc_stlswr128_device::device_add_mconfig(machine_config &config)
+{
+ /* TODO: romslot3 is unavailable when board is fitted */
+ //config.device_remove(":romslot3");
+ BBC_ROMSLOT16(config, m_rom[8], bbc_rom_devices, "ram").set_fixed_ram(true);
+ BBC_ROMSLOT16(config, m_rom[9], bbc_rom_devices, "ram").set_fixed_ram(true);
+ BBC_ROMSLOT16(config, m_rom[10], bbc_rom_devices, "ram").set_fixed_ram(true);
+ BBC_ROMSLOT16(config, m_rom[11], bbc_rom_devices, "ram").set_fixed_ram(true);
+ BBC_ROMSLOT16(config, m_rom[12], bbc_rom_devices, "ram").set_fixed_ram(true);
+ BBC_ROMSLOT16(config, m_rom[13], bbc_rom_devices, "ram").set_fixed_ram(true);
+ BBC_ROMSLOT16(config, m_rom[14], bbc_rom_devices, "ram").set_fixed_ram(true);
+ BBC_ROMSLOT16(config, m_rom[15], bbc_rom_devices, "ram").set_fixed_ram(true);
+}
+
+//-------------------------------------------------
+// rom_region - device-specific ROM region
+//-------------------------------------------------
+
+const tiny_rom_entry *bbc_stlswr_device::device_rom_region() const
+{
+ return ROM_NAME(stlswr);
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// bbc_stlswr_device - constructor
+//-------------------------------------------------
+
+bbc_stlswr_device::bbc_stlswr_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, type, tag, owner, clock)
+ , device_bbc_internal_interface(mconfig, *this)
+ , m_rom(*this, "romslot%u", 0U)
+{
+}
+
+bbc_stlswr16_device::bbc_stlswr16_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : bbc_stlswr_device(mconfig, BBC_STLSWR16, tag, owner, clock)
+{
+}
+
+bbc_stlswr32_device::bbc_stlswr32_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : bbc_stlswr_device(mconfig, BBC_STLSWR32, tag, owner, clock)
+{
+}
+
+bbc_stlswr64_device::bbc_stlswr64_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : bbc_stlswr_device(mconfig, BBC_STLSWR64, tag, owner, clock)
+{
+}
+
+bbc_stlswr128_device::bbc_stlswr128_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : bbc_stlswr_device(mconfig, BBC_STLSWR128, tag, owner, clock)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void bbc_stlswr_device::device_start()
+{
+ /* register for save states */
+ save_item(NAME(m_romsel));
+ save_item(NAME(m_ramsel));
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION
+//**************************************************************************
+
+uint8_t bbc_stlswr_device::paged_r(offs_t offset)
+{
+ uint8_t data = 0xff;
+
+ switch (m_romsel)
+ {
+ case 0: case 1: case 2: case 3:
+ /* motherboard rom sockets */
+ if (m_mb_rom[m_romsel] && m_mb_rom[m_romsel]->present())
+ {
+ data = m_mb_rom[m_romsel]->read(offset);
+ }
+ else
+ {
+ data = m_region_swr->base()[offset + (m_romsel << 14)];
+ }
+ break;
+ default:
+ /* expansion board sockets */
+ if (m_rom[m_romsel] && m_rom[m_romsel]->present())
+ {
+ data = m_rom[m_romsel]->read(offset);
+ }
+ else
+ {
+ data = m_region_swr->base()[offset + (m_romsel << 14)];
+ }
+ break;
+ }
+
+ return data;
+}
+
+void bbc_stlswr_device::paged_w(offs_t offset, uint8_t data)
+{
+ switch (m_romsel)
+ {
+ case 0: case 1: case 2: case 3:
+ /* motherboard rom sockets */
+ if (m_mb_rom[m_romsel])
+ {
+ m_mb_rom[m_romsel]->write(offset, data);
+ }
+ break;
+ }
+
+ /* expansion board sockets */
+ if (m_rom[m_ramsel])
+ {
+ m_rom[m_ramsel]->write(offset, data);
+ }
+}