diff options
author | Nigel Barnes <Pernod70@users.noreply.github.com> | 2020-03-03 19:34:36 +0000 |
---|---|---|
committer | Nigel Barnes <Pernod70@users.noreply.github.com> | 2020-03-03 19:40:23 +0000 |
commit | 660194d7cee5cab944c57991b1ae3d4c1e8af4b9 (patch) | |
tree | 303d5420805ad7dfba3e6263f05653ec7c3f08df /src/devices | |
parent | a1a70c4357c4ee87e7492a4cd2f62306f7965cd5 (diff) |
bus/bbc/1mhzbus: Added Pull Down RAM and Colour Card 500 devices.
Diffstat (limited to 'src/devices')
-rw-r--r-- | src/devices/bus/bbc/1mhzbus/1mhzbus.cpp | 10 | ||||
-rw-r--r-- | src/devices/bus/bbc/1mhzbus/cc500.cpp | 176 | ||||
-rw-r--r-- | src/devices/bus/bbc/1mhzbus/cc500.h | 59 | ||||
-rw-r--r-- | src/devices/bus/bbc/1mhzbus/pdram.cpp | 87 | ||||
-rw-r--r-- | src/devices/bus/bbc/1mhzbus/pdram.h | 49 |
5 files changed, 379 insertions, 2 deletions
diff --git a/src/devices/bus/bbc/1mhzbus/1mhzbus.cpp b/src/devices/bus/bbc/1mhzbus/1mhzbus.cpp index ca3a5e5f0af..0748624d276 100644 --- a/src/devices/bus/bbc/1mhzbus/1mhzbus.cpp +++ b/src/devices/bus/bbc/1mhzbus/1mhzbus.cpp @@ -108,6 +108,7 @@ void bbc_1mhzbus_slot_device::jim_w(offs_t offset, uint8_t data) // slot devices #include "autoprom.h" +#include "cc500.h" //#include "beebscan.h" //#include "teletext.h" //#include "digitiser.h" @@ -119,6 +120,7 @@ void bbc_1mhzbus_slot_device::jim_w(offs_t offset, uint8_t data) #include "scsi.h" //#include "multiform.h" #include "opus3.h" +#include "pdram.h" #include "pms64k.h" #include "ramdisc.h" //#include "graduate.h" @@ -145,11 +147,13 @@ void bbc_1mhzbus_devices(device_slot_interface &device) //device.option_add("procyon", BBC_PROCYON); /* CST Procyon IEEE Interface */ //device.option_add("multiform", BBC_MULTIFORM); /* Technomatic Multiform Z80 */ device.option_add("opus3", BBC_OPUS3); /* Opus Challenger 3 */ + device.option_add("pdram", BBC_PDRAM); /* Micro User Pull Down RAM */ device.option_add("pms64k", BBC_PMS64K); /* PMS 64K Non-Volatile Ram Module */ device.option_add("ramdisc", BBC_RAMDISC); /* Morley Electronics RAM Disc */ - //device.option_add("graduate", BBC_GRADUATE); /* The Torch Graduate G400/G800 */ + //device.option_add("graduate", BBC_GRADUATE); /* Torch Graduate G400/G800 */ device.option_add("beebopl", BBC_BEEBOPL); /* BeebOPL */ device.option_add("beebsid", BBC_BEEBSID); /* BeebSID */ + device.option_add("cc500", BBC_CC500); /* CTS Colour Card 500 */ //device.option_add("prisma3", BBC_PRISMA3); /* PRISMA-3 - Millipede 1989 */ device.option_add("sprite", BBC_SPRITE); /* Logotron Sprite Board */ } @@ -172,11 +176,13 @@ void bbcm_1mhzbus_devices(device_slot_interface &device) //device.option_add("m87", BBC_M87); /* Peartree Music 87 Synthesiser */ //device.option_add("multiform", BBC_MULTIFORM); /* Technomatic Multiform Z80 */ device.option_add("opusa", BBC_OPUSA); /* Opus Challenger ADFS */ + device.option_add("pdram", BBC_PDRAM); /* Micro User Pull Down RAM */ device.option_add("pms64k", BBC_PMS64K); /* PMS 64K Non-Volatile Ram Module */ device.option_add("ramdisc", BBC_RAMDISC); /* Morley Electronics RAM Disc */ - //device.option_add("graduate", BBC_GRADUATE); /* The Torch Graduate G400/G800 */ + //device.option_add("graduate", BBC_GRADUATE); /* Torch Graduate G400/G800 */ device.option_add("beebopl", BBC_BEEBOPL); /* BeebOPL */ device.option_add("beebsid", BBC_BEEBSID); /* BeebSID */ + device.option_add("cc500", BBC_CC500); /* CTS Colour Card 500 */ //device.option_add("prisma3", BBC_PRISMA3); /* PRISMA-3 - Millipede 1989 */ device.option_add("sprite", BBC_SPRITE); /* Logotron Sprite Board */ device.option_add_internal("cfa3000opt", CFA3000_OPT);/* Henson CFA 3000 Option Board */ diff --git a/src/devices/bus/bbc/1mhzbus/cc500.cpp b/src/devices/bus/bbc/1mhzbus/cc500.cpp new file mode 100644 index 00000000000..2d13526ed6b --- /dev/null +++ b/src/devices/bus/bbc/1mhzbus/cc500.cpp @@ -0,0 +1,176 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Colour Card 500 - CTS Recognition + + The CTS Palette is a 1 MHz bus device and it can be used to convert the 8 + colours available on the BBC into any 8 colours from a range of 4096. + + Programming the hardware directly + --------------------------------- + The hardware consists of 3 banks of very fast RAM (for red, green and blue + levels) and a 6522 versatile interface adaptor. + + The memory map is as follows: + + 6522 VIA &FC90 to &FC9F + + RED BANK &FCA0 to &FCA7 + GREEN BANK &FCA8 to &FCAF + BLUE BANK &FCB0 to &FCB8 + + There are 8 bytes in each bank, one for each actual colour. The physical + colour for logical colour L is stored at &FCA0+L, &FCA8+L and &FCB0+L. + + For example, to reprogram actual colour 1 to brown, 10 would be stored in + &FCA1, 6 in &FCA9 and 0 in &FCB1. + + Port A of the 6522 VIA is available for use as an extra 'user port', and + Port B is used internally. + + Note : Line (Horizontal) sync pulses are available on PB6 + Field (Vertical) sync pulses are available on CB1 + +**********************************************************************/ + + +#include "emu.h" +#include "cc500.h" + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE(BBC_CC500, bbc_cc500_device, "bbc_cc500", "CTS Colour Card 500") + + +//------------------------------------------------- +// ROM( cc500 ) +//------------------------------------------------- + +ROM_START(cc500) + ROM_REGION(0x4000, "exp_rom", 0) + ROM_LOAD("cts_palette_1.10.rom", 0x0000, 0x2000, CRC(93533144) SHA1(e645afdc5c7574a487ff484b79ea21a3b476f847)) +ROM_END + +//------------------------------------------------- +// device_add_mconfig - add device configuration +//------------------------------------------------- + +void bbc_cc500_device::device_add_mconfig(machine_config &config) +{ + VIA6522(config, m_via, DERIVED_CLOCK(1, 1)); + m_via->readpa_handler().set(m_userport, FUNC(bbc_userport_slot_device::pb_r)); + m_via->writepa_handler().set(m_userport, FUNC(bbc_userport_slot_device::pb_w)); + m_via->irq_handler().set(DEVICE_SELF_OWNER, FUNC(bbc_1mhzbus_slot_device::irq_w)); + + BBC_USERPORT_SLOT(config, m_userport, bbc_userport_devices, nullptr); + m_userport->cb1_handler().set(m_via, FUNC(via6522_device::write_ca1)); + m_userport->cb2_handler().set(m_via, FUNC(via6522_device::write_ca2)); + + BBC_1MHZBUS_SLOT(config, m_1mhzbus, DERIVED_CLOCK(1, 1), bbc_1mhzbus_devices, nullptr); + m_1mhzbus->irq_handler().set(DEVICE_SELF_OWNER, FUNC(bbc_1mhzbus_slot_device::irq_w)); + m_1mhzbus->nmi_handler().set(DEVICE_SELF_OWNER, FUNC(bbc_1mhzbus_slot_device::nmi_w)); +} + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const tiny_rom_entry* bbc_cc500_device::device_rom_region() const +{ + return ROM_NAME(cc500); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// bbc_cc500_device - constructor +//------------------------------------------------- + +bbc_cc500_device::bbc_cc500_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, BBC_CC500, tag, owner, clock) + , device_bbc_1mhzbus_interface(mconfig, *this) + , m_palette(*this, ":palette") + , m_1mhzbus(*this, "1mhzbus") + , m_via(*this, "via") + , m_userport(*this, "userport") +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void bbc_cc500_device::device_start() +{ + memset(m_palette_ram, 0, sizeof(m_palette_ram)); + + /* register for save states */ + save_item(NAME(m_palette_ram)); +} + + +//************************************************************************** +// IMPLEMENTATION +//************************************************************************** + +uint8_t bbc_cc500_device::fred_r(offs_t offset) +{ + uint8_t data = 0xff; + + switch (offset & 0xf0) + { + case 0x90: + data = m_via->read(offset & 0x0f); + break; + } + + data &= m_1mhzbus->fred_r(offset); + + return data; +} + +void bbc_cc500_device::fred_w(offs_t offset, uint8_t data) +{ + switch (offset & 0xf0) + { + case 0x90: + m_via->write(offset & 0x0f, data); + break; + + case 0xa0: case 0xb0: + switch (offset & 0x18) + { + case 0x00: + m_palette_ram[~offset & 0x07].set_r((data << 4) | (data & 0x0f)); + break; + case 0x08: + m_palette_ram[~offset & 0x07].set_g((data << 4) | (data & 0x0f)); + break; + case 0x10: + m_palette_ram[~offset & 0x07].set_b((data << 4) | (data & 0x0f)); + break; + } + m_palette->set_pen_colors(0, &m_palette_ram[0], 8); + break; + } + + m_1mhzbus->fred_w(offset, data); +} + +uint8_t bbc_cc500_device::jim_r(offs_t offset) +{ + return m_1mhzbus->jim_r(offset); +} + +void bbc_cc500_device::jim_w(offs_t offset, uint8_t data) +{ + m_1mhzbus->jim_w(offset, data); +} diff --git a/src/devices/bus/bbc/1mhzbus/cc500.h b/src/devices/bus/bbc/1mhzbus/cc500.h new file mode 100644 index 00000000000..f99ceec100a --- /dev/null +++ b/src/devices/bus/bbc/1mhzbus/cc500.h @@ -0,0 +1,59 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Colour Card 500 - CTS Recognition + +**********************************************************************/ + +#ifndef MAME_BUS_BBC_1MHZBUS_CC500_H +#define MAME_BUS_BBC_1MHZBUS_CC500_H + +#include "1mhzbus.h" +#include "machine/6522via.h" +#include "bus/bbc/userport/userport.h" +#include "emupal.h" + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> bbc_cc500_device + +class bbc_cc500_device : + public device_t, + public device_bbc_1mhzbus_interface +{ +public: + // construction/destruction + bbc_cc500_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + +protected: + // device-level overrides + virtual void device_start() override; + + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override; + virtual const tiny_rom_entry* device_rom_region() const override; + + virtual uint8_t fred_r(offs_t offset) override; + virtual void fred_w(offs_t offset, uint8_t data) override; + virtual uint8_t jim_r(offs_t offset) override; + virtual void jim_w(offs_t offset, uint8_t data) override; + +private: + required_device<palette_device> m_palette; + required_device<bbc_1mhzbus_slot_device> m_1mhzbus; + required_device<via6522_device> m_via; + required_device<bbc_userport_slot_device> m_userport; + + rgb_t m_palette_ram[8]; +}; + + +// device type definition +DECLARE_DEVICE_TYPE(BBC_CC500, bbc_cc500_device) + + +#endif // MAME_BUS_BBC_1MHZBUS_CC500_H diff --git a/src/devices/bus/bbc/1mhzbus/pdram.cpp b/src/devices/bus/bbc/1mhzbus/pdram.cpp new file mode 100644 index 00000000000..81106218fc4 --- /dev/null +++ b/src/devices/bus/bbc/1mhzbus/pdram.cpp @@ -0,0 +1,87 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Pull Down RAM - Micro User Jul/Aug 1990 + +**********************************************************************/ + + +#include "emu.h" +#include "pdram.h" + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE(BBC_PDRAM, bbc_pdram_device, "bbc_pdram", "Micro User Pull Down RAM (DIY)"); + + +//------------------------------------------------- +// ROM( pdram ) +//------------------------------------------------- + +ROM_START(pdram) + ROM_REGION(0x4000, "exp_rom", 0) + ROM_LOAD("ramdvr.rom", 0x0000, 0x2000, CRC(56f61728) SHA1(265359d1fb9c0adca53912aa6a42a995b8225a3e)) +ROM_END + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const tiny_rom_entry* bbc_pdram_device::device_rom_region() const +{ + return ROM_NAME(pdram); +} + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// bbc_pdram_device - constructor +//------------------------------------------------- + +bbc_pdram_device::bbc_pdram_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, BBC_PDRAM, tag, owner, clock) + , device_bbc_1mhzbus_interface(mconfig, *this) + , m_ram_page(0) +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void bbc_pdram_device::device_start() +{ + m_ram = std::make_unique<uint8_t[]>(0x8000); + + /* register for save states */ + save_pointer(NAME(m_ram), 0x8000); +} + + +//************************************************************************** +// IMPLEMENTATION +//************************************************************************** + +void bbc_pdram_device::fred_w(offs_t offset, uint8_t data) +{ + if (offset == 0xff) + { + m_ram_page = data; + } +} + +uint8_t bbc_pdram_device::jim_r(offs_t offset) +{ + return m_ram[(m_ram_page << 8) | offset]; +} + +void bbc_pdram_device::jim_w(offs_t offset, uint8_t data) +{ + m_ram[(m_ram_page << 8) | offset] = data; +} diff --git a/src/devices/bus/bbc/1mhzbus/pdram.h b/src/devices/bus/bbc/1mhzbus/pdram.h new file mode 100644 index 00000000000..23f5b2884ca --- /dev/null +++ b/src/devices/bus/bbc/1mhzbus/pdram.h @@ -0,0 +1,49 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Pull Down RAM + +**********************************************************************/ + + +#ifndef MAME_BUS_BBC_1MHZBUS_PDRAM_H +#define MAME_BUS_BBC_1MHZBUS_PDRAM_H + +#include "1mhzbus.h" + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +class bbc_pdram_device: + public device_t, + public device_bbc_1mhzbus_interface +{ +public: + // construction/destruction + bbc_pdram_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + +protected: + // device-level overrides + virtual void device_start() override; + + // optional information overrides + virtual const tiny_rom_entry* device_rom_region() const override; + + virtual void fred_w(offs_t offset, uint8_t data) override; + virtual uint8_t jim_r(offs_t offset) override; + virtual void jim_w(offs_t offset, uint8_t data) override; + +private: + std::unique_ptr<uint8_t[]> m_ram; + + uint8_t m_ram_page; +}; + + +// device type definition +DECLARE_DEVICE_TYPE(BBC_PDRAM, bbc_pdram_device); + + +#endif /* MAME_BUS_BBC_1MHZBUS_PDRAM_H */ |