// license:BSD-3-Clause // copyright-holders:Joakim Larsson Edstrom /*************************************************************************** * * Mizar VME8105 rev D 3U SBC driver, initially derived from force68k.c * * 19/08/2015 * * I baught this board from http://www.retrotechnology.com without documentation. * It has a Motorola 68000 CPU @ 10MHz and two 27128 EPROMS with OS9 DEBUG labels * and not much more except 16 or so TTLs, 2 PALs and a VME P1 connector. It is a * 2 sided design so it shold be possible to trace the schematics quite easily. * There is a date on the P1 Connector: "Feb 20 1987" * * || * || * || * || * ||____________________________________________________________ ___ * || --------------K2|U6-7432|U7-7474|U14-7405|U21-74645 | |_| | * || | 2764 - low |-+-------+-------+--------+-----------+ | | | * || | OS9 DEBUG U4| +---------+ +--------+---------+ | | | * || -------------- | | |U13-7474|U20-74645| | | | * || ______________ | | +--------+---------+ | | | * || | | | | ______________K4____ | | | * || | U3| | | |U12-7438|U19-74244| | |VME| * || -------------- | |+------K6---------K3---+ | | | * || ______________ | ||U11-PAL20L10|U18-74244| | |P1 | * || | 2764 - high | | |+-----021102-+---------+ | | | * || | OS9 DEBUG U2| |MC68000L10+------------+---------+ | | | * || |______________| | ||U10-PAL14L4 |U17-74244| | | | * || | |+-----021001-+---------+ | | | * || -------------- | |+----+_______|U16-74244|+--+| | | * || | | | |XTAL |U9-7410+---------+| || | | * ||K1 | U1| | |FOX100-------+---------+|K5||_| | * || -------------- |_________|10MHz|U8-7404|U15-74148|| || |___| * ||--||--------------------------------+----+-------+---------++--+ * ||--|| * || * * PAL:s *------ * The board has two PAL:s, a PAL20L10 and a PAL14L4. * * _____ _____ * OD/CLK 1 |* \_/ | 20 VCC * CPU A13 I0 2 | | 19 O0/LR A23 * U9 7410p12 I1 3 | | 18 O1/A0 A22 * CPU *AS I2 4 | | 17 02/A1 U2/U4 2764p22 *OE * GND I3 5 | | 16 03/A2 U11 PAL20L10p6 I4 * CPU A14 I4 6 | U10 | 15 A0/O0 U11 PAL20L10p7 I5 * CPU A15 I5 7 | PAL14L4 | 14 A1/O1 U19 74LS244p11 I0b * CPU A16 I6 8 | | 13 A2/O2 A18 * CPU A17 I7 9 | | 12 LR/O3 A20 * GND 10 |_____________| 11 CLK/OD A21 * * _____ _____ * OD/CLK 1 |* \_/ | 24 VCC * I0 2 | | 23 O0/LR * CPU *AS I1 3 | | 22 O1/A0 * U10 PAL14L4p3 I2 4 | | 21 02/A1 * I3 5 | | 20 03/A2 * U10 PAL14L4p16 I4 6 | U10 | 19 04/NC * U10 PAL14L4p15 I5 7 | PAL20L10 | 18 NC/O0 * I6 8 | | 17 A2/O1 * I7 9 | | 16 A1/O2 * I8 10 | | 15 A0/O3 * I9 11 | | 14 LR/O4 * GND 12 |_____________| 13 CLK/OD * * Trace is not fully completed and validated. * * History of Mizar *------------------- * Mizar was one of the first companies that released VME boards in 1982-3 together with * Force Computers and Motorola. Their systems was often supported by OS9/68000 from Microware. * In 1993 Mizar discontinued their OS9/CPU board product range and focused entirely on DSP * boards. RTSI was founded by Mizar employees preserving the knowledge in OS9 as consultants. * In 1998 Blue Wave resulted from the merger of Mizar and Loughborough Sound Images. * Not much tech information availabe but I found some quotes about Mizar on the internet: * * From http://archive.org/stream/68micro-vol-11-num-02/V11N02_Feb1989_djvu.txt : *-------------------------------------------------------------------------------- * " Mizar provides complete OS-9 solutions for the VMEbus. Mizar's VME CPUs * offer (he functions and performance your application demands. Our single * height (3U) VME processors are uniquely configurable computing engines, * Through Mizar's unique MXbus expansion interface, standard and custom side * modules can be added to basic processors to create double-height (6U) boards * tor specific applications, 3U CPU options include 68010, 66020, and 63030 * microprocessors, up to one MB of DRAM, serial I/O, real-time clock, and * mailbox interrupt support. Standard MXbus side modules include additional DRAM. * SRAM, and I/O. * * Mizar's standard double- height (6U) processors provide additional features such * as a high-speed cache to enhance 68030 performance, floating, point coprocessor * support, up to four MB dual ported DRAM, VSB memory interface, Ethernet, and SCSI. * * Mizar also supports OS-9 with completely configured OS9 development systems and * OS-9 application server systems. For more information, call Mizar today * * 800-635-0200 MIZAR 1419 Dunn Drive CarrolHon, TX 75006 214-446-2664" * * Known boards from Mizar: * *-Comp.Os.Vxworks diguest mailing list May 1992: VxWorks Drivers Available from Mizar: * EMX 7320 Serial I/O Board * EMX 7550 Ethernet Controller Board (AMD 7990 Lance) MAC: 00:80:F8 MIZAR, INC. * MZ 7300 Serial I/O Board (Z8530) * MZ 7400 Disk Controller Board (WD 2010; WD 1772) * MZ 7500 IEEE-488 (GPIB) Interface Board * MZ 7810 I/O Expansion Module (6681 DUART) * MZ 7831 SCSI Expansion Module (WD 33C93A) * MZ 7850 Ethernet Expansion Module (WD 83C690) * MZ 8505 IEEE-488 (GPIB) Interface Board" *- Other sources: * MZ 8000 ?? * MZ 8105 3U 68000 CPU board * MZ 8300 3U serial board, 2 NEC 7201 (Z80 DART) and 1 AMD CTS9513 5 x 16 bit Counter/Timer * * From http://www.megalextoria.com/forum2/index.php?t=msg&goto=73945& *-------------------------------------------------------------------- * Aug 20 1984 a report by James Jones from the OS/9 conferance in Des Moines: * "... * Mizar: is selling VME bus 68010 boards, running OS-9/68000; they also make * various memory and I/O boards, disk controller boards, and and a NEC 7220-based * graphics controller board...." * * Misc links about Mizar: * http://www.vita.com/History * http://www.verycomputer.com/154_e272024804bbe203_1.htm * https://www.aihitdata.com/company/00814595/RTSI/overview * * Address Map * -------------------------------------------------------------------------- * Address Range Description/Assumption * -------------------------------------------------------------------------- * 0x000000 0x01ffff ROM because of fixed vectors * 0x020000 0x03ffff RAM because bootvector stack starts at 0x21000 * -- VME adresses--- * 0xff0000 0xff0003 Bootstrap expects to find a UPD7201 serial device here * -------------------------------------------------------------------------- * * Interrupt sources * ---------------------------------------------------------- * Description Device Lvl IRQ VME board * /Board Vector Address * ---------------------------------------------------------- * On board Sources * TBD * Off board Sources (other VME boards) * TBD * ---------------------------------------------------------- * * TODO: * - Dump the ROMs (DONE) * - Setup a working address map (DONE) * - Add VME bus driver (Faked one) * ****************************************************************************/ #include "emu.h" #include "cpu/m68000/m68000.h" #include "machine/z80dart.h" #include "bus/rs232/rs232.h" #include "machine/clock.h" #include "softlist.h" #define CARDSLOT 0 #if CARDSLOT // Awaiting info on how to boot the user eproms #include "bus/generic/slot.h" #include "bus/generic/carts.h" #endif #define LOG(x) x /* These values are borrowed just to get the terminal going and should be replaced * once a proper serial board hardware (ie MZ 8300) is found and emulated. */ #define BAUDGEN_CLOCK XTAL_19_6608MHz /* fake */ #define UPD_CLOCK (BAUDGEN_CLOCK / 128) /* This will give prompt */ class mzr8105_state : public driver_device { public: mzr8105_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device (mconfig, type, tag), m_maincpu (*this, "maincpu") ,m_updterm(*this, "upd") // ,m_cart(*this, "exp_rom1") { } DECLARE_READ16_MEMBER (vme_a24_r); DECLARE_WRITE16_MEMBER (vme_a24_w); DECLARE_READ16_MEMBER (vme_a16_r); DECLARE_WRITE16_MEMBER (vme_a16_w); virtual void machine_start () override; DECLARE_WRITE_LINE_MEMBER (write_updterm_clock); #if CARDSLOT // User EPROM/SRAM slot(s) int mzr8105_load_cart(device_image_interface &image, generic_slot_device *slot); DECLARE_DEVICE_IMAGE_LOAD_MEMBER (exp1_load) { return mzr8105_load_cart(image, m_cart); } DECLARE_READ16_MEMBER (read16_rom); #endif protected: private: required_device m_maincpu; required_device m_updterm; // Pointer to System ROMs needed by bootvect_r // UINT16 *m_sysrom; #if CARDSLOT UINT16 *m_usrrom; required_device m_cart; #endif }; static ADDRESS_MAP_START (mzr8105_mem, AS_PROGRAM, 16, mzr8105_state) ADDRESS_MAP_UNMAP_HIGH //AM_RANGE (0x000000, 0x000007) AM_ROM AM_READ (bootvect_r) /* Not verified */ AM_RANGE (0x000000, 0x003fff) AM_ROM /* System EPROM Area 16Kb OS9 DEBUG - not verified */ AM_RANGE (0x004000, 0x01ffff) AM_ROM /* System EPROM Area 112Kb for System ROM - not verified */ AM_RANGE (0x020000, 0x03ffff) AM_RAM /* Not verified */ //AM_RANGE (0x0a0000, 0x0bffff) AM_ROM /* User EPROM/SRAM Area, max 128Kb mapped by a cartslot */ //AM_RANGE (0x0c0080, 0x0c0081) AM_DEVREADWRITE8 ("aciaterm", acia6850_device, status_r, control_w, 0xff00) //AM_RANGE (0x0c0082, 0x0c0083) AM_DEVREADWRITE8 ("aciaterm", acia6850_device, data_r, data_w, 0xff00) AM_RANGE(0x100000, 0xfeffff) AM_READWRITE(vme_a24_r, vme_a24_w) /* VMEbus Rev B addresses (24 bits) - not verified */ //AM_RANGE(0xff0000, 0xffffff) AM_READWRITE(vme_a16_r, vme_a16_w) /* VMEbus Rev B addresses (16 bits) - not verified */ // Faking a Mizar 8300 SIO BOARD in VME A16 adress space AM_RANGE (0xFF0000, 0xFF0001) AM_DEVREADWRITE8("upd", upd7201_device, da_r, da_w, 0x00ff) /* Dual serial port NEC uPD7201 */ AM_RANGE (0xFF0002, 0xFF0003) AM_DEVREADWRITE8("upd", upd7201_device, ca_r, ca_w, 0x00ff) /* Dual serial port NEC uPD7201 */ AM_RANGE (0xFF0004, 0xFF0005) AM_DEVREADWRITE8("upd", upd7201_device, db_r, db_w, 0x00ff) /* Dual serial port NEC uPD7201 */ AM_RANGE (0xFF0006, 0xFF0007) AM_DEVREADWRITE8("upd", upd7201_device, cb_r, cb_w, 0x00ff) /* Dual serial port NEC uPD7201 */ ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START (mzr8105) INPUT_PORTS_END /* Start it up */ void mzr8105_state::machine_start () { LOG (logerror ("machine_start\n")); #if CARDSLOT /* Map user ROM/RAM socket(s) */ if (m_cart->exists()) { m_usrrom = (UINT16*)m_cart->get_rom_base(); m_maincpu->space(AS_PROGRAM).install_read_handler(0xa0000, 0xbffff, read16_delegate(FUNC(generic_slot_device::read16_rom), (generic_slot_device*)m_cart)); } #endif } /* Dummy VME access methods until the VME bus device is ready for use */ READ16_MEMBER (mzr8105_state::vme_a24_r){ LOG (logerror ("vme_a24_r\n")); return (UINT16) 0; } WRITE16_MEMBER (mzr8105_state::vme_a24_w){ LOG (logerror ("vme_a24_w\n")); } READ16_MEMBER (mzr8105_state::vme_a16_r){ LOG (logerror ("vme_16_r\n")); return (UINT16) 0; } WRITE16_MEMBER (mzr8105_state::vme_a16_w){ LOG (logerror ("vme_a16_w\n")); } #if CARDSLOT /* * 4. The USER EPROM Area */ // Implementation of static 2 x 64K EPROM in sockets U1/U3 as 16 bit wide cartridge for easier // software handling. TODO: make configurable according to table above. static MACHINE_CONFIG_FRAGMENT( mzr8105_eprom_sockets ) MCFG_GENERIC_CARTSLOT_ADD("exp_rom1", generic_plain_slot, "mzr8105_cart") MCFG_GENERIC_EXTENSIONS("bin,rom") MCFG_GENERIC_WIDTH(GENERIC_ROM16_WIDTH) MCFG_GENERIC_ENDIAN(ENDIANNESS_BIG) MCFG_GENERIC_LOAD(mzr8105_state, exp1_load) // MCFG_SOFTWARE_LIST_ADD("cart_list", "mzr8105_cart") MACHINE_CONFIG_END /*************************** Rom loading functions ****************************/ int mzr8105_state::mzr8105_load_cart(device_image_interface &image, generic_slot_device *slot) { UINT32 size = slot->common_get_size("rom"); if (size > 0x20000) // Max 128Kb - not verified { LOG( printf("Cartridge size exceeding max size (128Kb): %d\n", size) ); image.seterror(IMAGE_ERROR_UNSPECIFIED, "Cartridge size exceeding max size (128Kb)"); return IMAGE_INIT_FAIL; } slot->rom_alloc(size, GENERIC_ROM16_WIDTH, ENDIANNESS_BIG); slot->common_load_rom(slot->get_rom_base(), size, "rom"); return IMAGE_INIT_PASS; } #endif WRITE_LINE_MEMBER (mzr8105_state::write_updterm_clock){ m_updterm->txca_w (state); m_updterm->rxca_w (state); } /* * Machine configuration */ static MACHINE_CONFIG_START (mzr8105, mzr8105_state) /* basic machine hardware */ MCFG_CPU_ADD ("maincpu", M68000, XTAL_10MHz) MCFG_CPU_PROGRAM_MAP (mzr8105_mem) /* Terminal Port config */ MCFG_UPD7201_ADD("upd", XTAL_4MHz, 0, 0, 0, 0 ) MCFG_Z80DART_OUT_TXDA_CB(DEVWRITELINE("rs232trm", rs232_port_device, write_txd)) MCFG_Z80DART_OUT_DTRA_CB(DEVWRITELINE("rs232trm", rs232_port_device, write_dtr)) MCFG_Z80DART_OUT_RTSA_CB(DEVWRITELINE("rs232trm", rs232_port_device, write_rts)) MCFG_RS232_PORT_ADD ("rs232trm", default_rs232_devices, "terminal") MCFG_RS232_RXD_HANDLER (DEVWRITELINE ("upd", upd7201_device, rxa_w)) MCFG_RS232_CTS_HANDLER (DEVWRITELINE ("upd", upd7201_device, ctsa_w)) MCFG_DEVICE_ADD ("updterm_clock", CLOCK, UPD_CLOCK) MCFG_CLOCK_SIGNAL_HANDLER (WRITELINE (mzr8105_state, write_updterm_clock)) #if CARDSLOT // EPROM sockets MCFG_FRAGMENT_ADD(mzr8105_eprom_sockets) #endif MACHINE_CONFIG_END /* ROM definitions */ ROM_START (mzr8105) ROM_REGION (0x1000000, "maincpu", 0) ROM_LOAD16_BYTE ("mzros9LB.bin", 0x000001, 0x2000, CRC (7c6a354d) SHA1 (2721eb649c8046dbcb517a36a97dc0816cd133f2)) ROM_LOAD16_BYTE ("mzros9HB.bin", 0x000000, 0x2000, CRC (d18e69a6) SHA1 (a00b68f4d649bcc09a29361f8692e52be12b3792)) /* * System ROM information * * The ROMs contains an OS9 bootloader. It is position independent but reset vector suggests that it sits flat on adress 0 (zero) * * We got a prompt but the command reportoair are very sparse to non OS9 users so investigation needed. * */ ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP (1987, mzr8105, 0, 0, mzr8105, mzr8105, driver_device, 0, "Mizar Inc", "Mizar VME8105", MACHINE_IS_SKELETON )