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bus/msx/cart/scsi.cpp: Add support for MSX Computer Club Gouda MSX-SC…
…SI Interface. (#11892)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| // license:BSD-3-Clause | ||
| // copyright-holders:Wilbert Pol | ||
| #include "emu.h" | ||
| #include "scsi.h" | ||
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| #include "bus/nscsi/devices.h" | ||
| #include "machine/nscsi_bus.h" | ||
| #include "machine/wd33c9x.h" | ||
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| /* | ||
| Implementation of SCSI interface as it appeared in: | ||
| - MSX Computer Club Gouda MSX-SCSI Interface | ||
| Other known SCSI(-ish) interfaces: | ||
| ASCII HD Interface (SASI Interface) | ||
| B.E.R.T. | ||
| ESE MegaSCSI | ||
| - Came with SRAM on the cartridge (128/256/512/1024KB SRAM) | ||
| HSH SCSI Interface | ||
| MAK/Green/Sparrowsoft SCSI Interface | ||
| MK SCSI Interface | ||
| - Evolved into B.E.R.T. SCSI Interface. | ||
| */ | ||
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| namespace | ||
| { | ||
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| class msx_cart_gouda_scsi_device : public device_t, public msx_cart_interface | ||
| { | ||
| public: | ||
| msx_cart_gouda_scsi_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) | ||
| : device_t(mconfig, MSX_CART_GOUDA_SCSI, tag, owner, clock) | ||
| , msx_cart_interface(mconfig, *this) | ||
| , m_wd33c93a(*this, "scsi:6:wd33c93a") | ||
| { } | ||
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| virtual std::error_condition initialize_cartridge(std::string &message) override; | ||
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| protected: | ||
| virtual void device_start() override { } | ||
| virtual void device_add_mconfig(machine_config &config) override; | ||
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| private: | ||
| required_device<wd33c93a_device> m_wd33c93a; | ||
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| void wd33c93a(device_t *device); | ||
| void reset_w(u8 data); | ||
| }; | ||
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| void msx_cart_gouda_scsi_device::wd33c93a(device_t *device) | ||
| { | ||
| device->set_clock(10'000'000); | ||
| } | ||
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| void msx_cart_gouda_scsi_device::device_add_mconfig(machine_config &config) | ||
| { | ||
| NSCSI_BUS(config, "scsi", 0); | ||
| NSCSI_CONNECTOR(config, "scsi:0", default_scsi_devices, "harddisk", false); | ||
| NSCSI_CONNECTOR(config, "scsi:1", default_scsi_devices, nullptr, false); | ||
| NSCSI_CONNECTOR(config, "scsi:2", default_scsi_devices, nullptr, false); | ||
| NSCSI_CONNECTOR(config, "scsi:3", default_scsi_devices, nullptr, false); | ||
| NSCSI_CONNECTOR(config, "scsi:4", default_scsi_devices, nullptr, false); | ||
| NSCSI_CONNECTOR(config, "scsi:5", default_scsi_devices, nullptr, false); | ||
| NSCSI_CONNECTOR(config, "scsi:6").option_set("wd33c93a", WD33C93A) | ||
| .machine_config([this] (device_t *device) { wd33c93a(device); }); | ||
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| } | ||
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| std::error_condition msx_cart_gouda_scsi_device::initialize_cartridge(std::string &message) | ||
| { | ||
| if (!cart_rom_region()) | ||
| { | ||
| message = "msx_cart_gouda_scsi_device: Required region 'rom' was not found."; | ||
| return image_error::INTERNAL; | ||
| } | ||
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| if (cart_rom_region()->bytes() < 0x4000) | ||
| { | ||
| message = "msx_cart_gouda_scsi_device: Region 'rom' has unsupported size."; | ||
| return image_error::INVALIDLENGTH; | ||
| } | ||
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| page(1)->install_rom(0x4000, 0x7fff, cart_rom_region()->base()); | ||
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| io_space().install_write_handler(0x34, 0x35, emu::rw_delegate(*m_wd33c93a, FUNC(wd33c93a_device::indir_w))); | ||
| io_space().install_read_handler(0x34, 0x35, emu::rw_delegate(*m_wd33c93a, FUNC(wd33c93a_device::indir_r))); | ||
| io_space().install_write_handler(0x36, 0x36, emu::rw_delegate(*this, FUNC(msx_cart_gouda_scsi_device::reset_w))); | ||
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| return std::error_condition(); | ||
| } | ||
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| void msx_cart_gouda_scsi_device::reset_w(u8 data) | ||
| { | ||
| m_wd33c93a->reset_w(data); | ||
| } | ||
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| } // anonymous namespace | ||
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| DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_GOUDA_SCSI, msx_cart_interface, msx_cart_gouda_scsi_device, "msx_cart_gouda_scsi", "MSX Computer Club Gouda MSX-SCSI Interface") |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| // license:BSD-3-Clause | ||
| // copyright-holders:Wilbert Pol | ||
| #ifndef MAME_BUS_MSX_CART_SCSI_H | ||
| #define MAME_BUS_MSX_CART_SCSI_H | ||
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| #pragma once | ||
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| #include "bus/msx/slot/cartridge.h" | ||
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| DECLARE_DEVICE_TYPE(MSX_CART_GOUDA_SCSI, msx_cart_interface) | ||
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| #endif // MAME_BUS_MSX_CART_SCSI_H |
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