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Diffstat (limited to 'src/mame/drivers/miniframe.cpp')
-rw-r--r-- | src/mame/drivers/miniframe.cpp | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/src/mame/drivers/miniframe.cpp b/src/mame/drivers/miniframe.cpp deleted file mode 100644 index a3b4432dbee..00000000000 --- a/src/mame/drivers/miniframe.cpp +++ /dev/null @@ -1,281 +0,0 @@ -// license:GPL-2.0+ -// copyright-holders:Dirk Best, R. Belmont -/*************************************************************************** - - Convergent Miniframe - - Preliminary driver by R. Belmont based on unixpc.cpp by Dirk Best & R. Belmont - -***************************************************************************/ - - -#include "emu.h" -#include "cpu/m68000/m68000.h" -#include "imagedev/floppy.h" -#include "machine/ram.h" -#include "machine/wd_fdc.h" -#include "machine/bankdev.h" -#include "machine/pit8253.h" -#include "machine/pic8259.h" -#include "screen.h" - -/*************************************************************************** - DRIVER STATE -***************************************************************************/ - -class miniframe_state : public driver_device -{ -public: - miniframe_state(const machine_config &mconfig, device_type type, const char *tag) - : driver_device(mconfig, type, tag) - , m_maincpu(*this, "maincpu") - , m_ram(*this, RAM_TAG) - , m_wd2797(*this, "wd2797") - , m_floppy(*this, "wd2797:0:525dd") - , m_ramrombank(*this, "ramrombank") - , m_mapram(*this, "mapram") - { } - - void miniframe(machine_config &config); - -private: - required_device<m68010_device> m_maincpu; - required_device<ram_device> m_ram; - required_device<wd2797_device> m_wd2797; - required_device<floppy_image_device> m_floppy; - required_device<address_map_bank_device> m_ramrombank; - - uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); - - virtual void machine_start() override; - virtual void machine_reset() override; - - DECLARE_READ16_MEMBER(ram_mmu_r); - DECLARE_WRITE16_MEMBER(ram_mmu_w); - - DECLARE_WRITE16_MEMBER(general_ctrl_w); - - DECLARE_WRITE_LINE_MEMBER( wd2797_intrq_w ); - DECLARE_WRITE_LINE_MEMBER( wd2797_drq_w ); - - required_shared_ptr<uint16_t> m_mapram; - - void miniframe_mem(address_map &map); - void ramrombank_map(address_map &map); - - uint16_t *m_ramptr; - uint32_t m_ramsize; - uint16_t m_diskdmasize; - uint32_t m_diskdmaptr; - bool m_fdc_intrq; -}; - - -/*************************************************************************** - MEMORY -***************************************************************************/ - -static constexpr unsigned MMU_MAX_PAGES = 1024; -static constexpr uint16_t MMU_WRITE_ENABLE = 0x8000; -static constexpr uint16_t MMU_STATUS_MASK = 0x6000; -static constexpr uint16_t MMU_STATUS_NOT_PRESENT = 0x0000; -static constexpr uint16_t MMU_STATUS_PRESENT_NOT_ACCESSED = 0x2000; -static constexpr uint16_t MMU_STATUS_ACCESSED_NOT_WRITTEN = 0x4000; -static constexpr uint16_t MMU_STATUS_ACCESSED_WRITTEN = 0x6000; - -READ16_MEMBER( miniframe_state::ram_mmu_r ) -{ - uint8_t fc = m_maincpu->get_fc(); - uint16_t mapentry = m_mapram[(offset >> 11) & 0x7ff]; - - if ((offset < ((512*1024)>>1)) && (fc != M68K_FC_SUPERVISOR_DATA) && (fc != M68K_FC_SUPERVISOR_PROGRAM)) - { - fatalerror("mmu: user mode access to lower 512K, need to generate a fault\n"); - } - - if ((mapentry & MMU_STATUS_MASK) != MMU_STATUS_NOT_PRESENT) - { - uint32_t addr = (offset & 0x7ff) | ((mapentry & 0xfff) << 11); - //printf("mmu_r: orig %x entry %04x xlate %x\n", offset, mapentry, addr); - - // indicate page has been read - if ((mapentry & MMU_STATUS_MASK) == MMU_STATUS_PRESENT_NOT_ACCESSED) - { - m_mapram[(offset >> 11) & 0x7ff] &= ~MMU_STATUS_MASK; - m_mapram[(offset >> 11) & 0x7ff] |= MMU_STATUS_ACCESSED_NOT_WRITTEN; - } - - return m_ramptr[addr]; - } - else - { - fatalerror("miniframe: invalid MMU page accessed, need to throw a fault\n"); - } -} - -WRITE16_MEMBER( miniframe_state::ram_mmu_w ) -{ - uint8_t fc = m_maincpu->get_fc(); - uint16_t mapentry = m_mapram[(offset >> 11) & 0x7ff]; - - if ((offset < ((512*1024)>>1)) && (fc != M68K_FC_SUPERVISOR_DATA) && (fc != M68K_FC_SUPERVISOR_PROGRAM)) - { - fatalerror("mmu: user mode access to lower 512K, need to generate a fault\n"); - } - - if ((mapentry & MMU_STATUS_MASK) != MMU_STATUS_NOT_PRESENT) - { - uint32_t addr = (offset & 0x7ff) | ((mapentry & 0xfff) << 11); - //printf("mmu_w: orig %x entry %04x xlate %x\n", offset, mapentry, addr); - - if (!(mapentry & MMU_WRITE_ENABLE) && (fc != M68K_FC_SUPERVISOR_PROGRAM) && (fc != M68K_FC_SUPERVISOR_DATA)) - { - fatalerror("mmu: write protection violation, need to throw a fault\n"); - } - - // indicate page has been written - // we know it's OK to just OR this - m_mapram[(offset >> 11) & 0x7ff] |= MMU_STATUS_ACCESSED_WRITTEN; - - COMBINE_DATA(&m_ramptr[addr]); - } - else - { - fatalerror("miniframe: invalid MMU page accessed, need to throw a fault\n"); - } -} - -WRITE16_MEMBER( miniframe_state::general_ctrl_w ) -{ - if (data & 0x1000) // ROM mirror at 0 if set - { - m_ramrombank->set_bank(1); - } - else - { - m_ramrombank->set_bank(0); - } - - logerror("%x to general_ctrl_w\n", data); -} - -void miniframe_state::machine_start() -{ - m_ramptr = (uint16_t *)m_ram->pointer(); - m_ramsize = m_ram->size(); -} - -void miniframe_state::machine_reset() -{ - // force ROM into lower mem on reset - m_ramrombank->set_bank(0); - - // invalidate all pages by clearing all entries - memset(m_mapram, 0, MMU_MAX_PAGES * sizeof(uint16_t)); -} - -/*************************************************************************** - VIDEO -***************************************************************************/ - -uint32_t miniframe_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) -{ - return 0; -} - - -/*************************************************************************** - ADDRESS MAPS -***************************************************************************/ - -void miniframe_state::miniframe_mem(address_map &map) -{ - map(0x000000, 0x3fffff).m(m_ramrombank, FUNC(address_map_bank_device::amap16)); - map(0x400000, 0x4007ff).ram().share("mapram"); - map(0x450000, 0x450001).w(FUNC(miniframe_state::general_ctrl_w)); - map(0x800000, 0x81ffff).rom().region("bootrom", 0); - map(0xc00000, 0xc00007).rw("pit8253", FUNC(pit8253_device::read), FUNC(pit8253_device::write)).umask16(0x00ff); - map(0xc40000, 0xc40007).rw("baudgen", FUNC(pit8253_device::read), FUNC(pit8253_device::write)).umask16(0x00ff); - map(0xc90000, 0xc90003).rw("pic8259", FUNC(pic8259_device::read), FUNC(pic8259_device::write)).umask16(0x00ff); -} - -void miniframe_state::ramrombank_map(address_map &map) -{ - map(0x000000, 0x3fffff).rom().region("bootrom", 0); - map(0x400000, 0x7fffff).rw(FUNC(miniframe_state::ram_mmu_r), FUNC(miniframe_state::ram_mmu_w)); -} - -/*************************************************************************** - INPUT PORTS -***************************************************************************/ - -static INPUT_PORTS_START( miniframe ) -INPUT_PORTS_END - - -/*************************************************************************** - MACHINE DRIVERS -***************************************************************************/ - -static void miniframe_floppies(device_slot_interface &device) -{ - device.option_add("525dd", FLOPPY_525_DD); -} - -void miniframe_state::miniframe(machine_config &config) -{ - // basic machine hardware - M68010(config, m_maincpu, XTAL(10'000'000)); - m_maincpu->set_addrmap(AS_PROGRAM, &miniframe_state::miniframe_mem); - - // internal ram - RAM(config, RAM_TAG).set_default_size("1M").set_extra_options("2M"); - - // RAM/ROM bank - ADDRESS_MAP_BANK(config, "ramrombank").set_map(&miniframe_state::ramrombank_map).set_options(ENDIANNESS_BIG, 16, 32, 0x400000); - - // floppy - WD2797(config, m_wd2797, 1000000); -// m_wd2797->intrq_wr_callback().set(FUNC(miniframe_state::wd2797_intrq_w)); -// m_wd2797->drq_wr_callback().set(FUNC(miniframe_state::wd2797_drq_w)); - FLOPPY_CONNECTOR(config, "wd2797:0", miniframe_floppies, "525dd", floppy_image_device::default_floppy_formats); - - // 8263s - pit8253_device &pit8253(PIT8253(config, "pit8253", 0)); - pit8253.set_clk<0>(76800); - pit8253.set_clk<1>(76800); - pit8253.out_handler<0>().set("pic8259", FUNC(pic8259_device::ir4_w)); // FIXME: fighting for IR4 - error, or needs input merger? - // chain clock 1 output into clock 2 - pit8253.out_handler<1>().set("pit8253", FUNC(pit8253_device::write_clk2)); - // and ir4 on the PIC - pit8253.out_handler<1>().append("pic8259", FUNC(pic8259_device::ir4_w)); - - pit8253_device &baudgen(PIT8253(config, "baudgen", 0)); - baudgen.set_clk<0>(1228800); - baudgen.set_clk<1>(1228800); - baudgen.set_clk<2>(1228800); - - // PIC8259s - pic8259_device &pic8259(PIC8259(config, "pic8259", 0)); - pic8259.out_int_callback().set_inputline(m_maincpu, M68K_IRQ_4); - pic8259.in_sp_callback().set_constant(1); -} - - -/*************************************************************************** - ROM DEFINITIONS -***************************************************************************/ - -ROM_START( minifram ) - ROM_REGION16_BE(0x400000, "bootrom", 0) - ROM_LOAD16_BYTE("72-00357.bin", 0x000001, 0x002000, CRC(17c2749c) SHA1(972b5300b4d6ec65536910eab2b8550b9df9bb4d)) - ROM_LOAD16_BYTE("72-00356.bin", 0x000000, 0x002000, CRC(28b6c23a) SHA1(479e739a8154b6754e2e9b1fcfeb99d6ceaf9dbe)) -ROM_END - - -/*************************************************************************** - GAME DRIVERS -***************************************************************************/ - -// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS -COMP( 1985, minifram, 0, 0, miniframe, miniframe, miniframe_state, empty_init, "Convergent", "Miniframe", MACHINE_NOT_WORKING | MACHINE_NO_SOUND ) |