// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** CCS Model 2810 2009-12-11 Skeleton driver. 2011-06-02 Connected to a terminal Chips: INS8250N-B, Z80A, uPD2716D, 82S129. Crystals: 16 MHz, 1.8432MHz SYSTEM OPERATION: Press Enter to start the system. All commands are in uppercase. A Assign logical device Dn,n Dump memory E Punch End-of-File to paper tape F Fill G Go H Hex arithmetic I In L Punch Leader to paper tape M Move O Out Q Query logical devices R Read a file from paper tape S Edit memory T Test memory V Verify (compare 2 blocks of memory) W Write a file to paper tape X Examine Registers Y Set Baud rate of i8250 Z Zleep (lock terminal). Press control+G twice to unlock. ***************************************************************************** CCS Model 2422B Chips: UB1793/MB8877, 3 proms and one eprom. Crystal = 16MHz SYSTEM OPERATION: Same as above, plus some extra commands B Boot from floppy L removed P Set disk parameters e.g. P0 10 0 = drive A, 10 sectors per track, 1 sided Q Set disk position for raw read/write e.g. Q6 0 9 = track 6, side 0, sector 9 Rs f Read absolute disk data (set by P and Q) to memory range s to f Ws f Write absolute disk data (set by P and Q) from memory range s to f ToDo: - fdc hld_r() has no code behind it, to be written - not sure of the polarities of some of the floppy/fdc signals (not documented) - no obvious option to change the fdc clock - currently hard coded for a 20cm drive, not sure how to option select drive sizes - a few jumpers to be added - the one disk that exists fails the test: Incorrect layout on track 0 head 0, expected_size=41666, current_size=68144 ****************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" //#include "machine/ins8250.h" #include "machine/terminal.h" #include "machine/wd_fdc.h" #define TERMINAL_TAG "terminal" class ccs_state : public driver_device { public: ccs_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_terminal(*this, TERMINAL_TAG), m_fdc (*this, "fdc"), m_floppy0(*this, "fdc:0") { } DECLARE_DRIVER_INIT(ccs2810); DECLARE_DRIVER_INIT(ccs2422); DECLARE_MACHINE_RESET(ccs); DECLARE_READ8_MEMBER(port04_r); DECLARE_READ8_MEMBER(port20_r); DECLARE_READ8_MEMBER(port25_r); DECLARE_READ8_MEMBER(port26_r); DECLARE_READ8_MEMBER(port34_r); DECLARE_WRITE8_MEMBER(port04_w); DECLARE_WRITE8_MEMBER(port20_w); DECLARE_WRITE8_MEMBER(port34_w); DECLARE_WRITE8_MEMBER(port40_w); DECLARE_WRITE8_MEMBER(kbd_put); private: UINT8 m_term_data; UINT8 m_26_count; bool m_ss; bool m_dden; bool m_dsize; UINT8 m_ds; floppy_image_device *m_floppy; required_device m_maincpu; required_device m_terminal; optional_device m_fdc; optional_device m_floppy0; }; static ADDRESS_MAP_START(ccs2810_mem, AS_PROGRAM, 8, ccs_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0xefff) AM_RAM AM_RANGE(0xf000, 0xf7ff) AM_READ_BANK("bankr0") AM_WRITE_BANK("bankw0") AM_RANGE(0xf800, 0xffff) AM_RAM ADDRESS_MAP_END static ADDRESS_MAP_START(ccs2810_io, AS_IO, 8, ccs_state) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x20, 0x20) AM_READWRITE(port20_r,port20_w) AM_RANGE(0x25, 0x25) AM_READ(port25_r) AM_RANGE(0x26, 0x26) AM_READ(port26_r) //AM_RANGE(0x20, 0x27) AM_DEVREADWRITE("ins8250", ins8250_device, ins8250_r, ins8250_w ) ADDRESS_MAP_END static ADDRESS_MAP_START(ccs2422_io, AS_IO, 8, ccs_state) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x04, 0x04) AM_READWRITE(port04_r,port04_w) AM_RANGE(0x20, 0x20) AM_READWRITE(port20_r,port20_w) AM_RANGE(0x25, 0x25) AM_READ(port25_r) AM_RANGE(0x26, 0x26) AM_READ(port26_r) AM_RANGE(0x30, 0x33) AM_DEVREADWRITE("fdc", mb8877_t, read, write) AM_RANGE(0x34, 0x34) AM_READWRITE(port34_r,port34_w) AM_RANGE(0x40, 0x40) AM_WRITE(port40_w) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( ccs2810 ) INPUT_PORTS_END //************************************* // // Keyboard // //************************************* READ8_MEMBER( ccs_state::port20_r ) { UINT8 ret = m_term_data; m_term_data = 0; return ret; } READ8_MEMBER( ccs_state::port25_r ) { return (m_term_data) ? 0x21 : 0x20; } READ8_MEMBER( ccs_state::port26_r ) { if (m_26_count) m_26_count--; return m_26_count; } WRITE8_MEMBER( ccs_state::port20_w ) { m_terminal->write(space, 0, data & 0x7f); } WRITE8_MEMBER( ccs_state::kbd_put ) { m_term_data = data; } #if 0 static const ins8250_interface com_intf = { DEVCB_NOOP, DEVCB_NOOP, DEVCB_NOOP, DEVCB_NOOP, DEVCB_NOOP, DEVCB_NOOP }; #endif //************************************* // // Status / Control ports // //************************************* /* Status 1 d0 : intrq d1 : ds0 d2 : ds1 d3 : ds2 d4 : ds3 d5 : hld (1=head loaded) d6 : autoboot (1=go to monitor) d7 : drq */ READ8_MEMBER( ccs_state::port34_r ) { //return (UINT8)m_drq | (m_ds << 1) | ((UINT8)fdc->hld_r() << 5) | 0x40 | ((UINT8)m_intrq << 7); return (UINT8)m_fdc->drq_r() | (m_ds << 1) | 0x20 | 0x40 | ((UINT8)m_fdc->intrq_r() << 7); // hld_r doesn't do anything } /* Status 2 d0 : trk00 (1=trk00 on 20cm drive; 0=trk00 on 13cm drive) d1 : drive size (0=20cm, 1=13cm) d2 : wprt from drive (0=write protected) d3 : /ss (1=side 0 is selected) d4 : index hole = 0 d5 : dden (1 = double density) d6 : double (0 = a double-sided 20cm disk is in the drive) d7 : drq */ READ8_MEMBER( ccs_state::port04_r ) { bool trk00=1,wprt=0,dside=1; int idx=1; if (m_floppy) { trk00 = !m_floppy->trk00_r(); wprt = !m_floppy->wpt_r(); idx = m_floppy->idx_r()^1; dside = m_floppy->twosid_r(); } return (UINT8)trk00 | 0 | ((UINT8)wprt << 2) | ((UINT8)m_ss << 3) | idx << 4 | ((UINT8)m_dden << 5) | ((UINT8)dside << 6) | ((UINT8)m_fdc->drq_r() << 7); } /* Control 1 d0 : ds0 d1 : ds1 d2 : ds2 d3 : ds3 d4 : drive size (adjusts fdc clock) d5 : mon (1=motor on) d6 : dden d7 : autowait (0=ignore drq) */ WRITE8_MEMBER( ccs_state::port34_w ) { m_ds = data & 15; m_dsize = BIT(data, 4); m_dden = BIT(data, 6); m_floppy = nullptr; if (BIT(data, 0)) m_floppy = m_floppy0->get_device(); m_fdc->set_floppy(m_floppy); m_fdc->dden_w(!m_dden); if (m_floppy) { m_floppy->mon_w(!BIT(data, 5)); } } /* Control 2 d2 : remote eject for persci drive (1=eject) d4 : fast seek mode (1=on) d6 : /ss (0=side 1 selected) d7 : rom enable (1=firmware enabled) other bits not used */ WRITE8_MEMBER( ccs_state::port04_w ) { m_ss = BIT(data, 6); if (m_floppy) m_floppy->ss_w(!m_ss); } //************************************* // // Machine // //************************************* WRITE8_MEMBER( ccs_state::port40_w ) { membank("bankr0")->set_entry( (data) ? 1 : 0); } MACHINE_RESET_MEMBER( ccs_state, ccs ) { membank("bankr0")->set_entry(0); // point at rom membank("bankw0")->set_entry(0); // always write to ram m_26_count = 0x41; m_maincpu->set_state_int(Z80_PC, 0xf000); } DRIVER_INIT_MEMBER( ccs_state, ccs2810 ) { UINT8 *main = memregion("maincpu")->base(); membank("bankr0")->configure_entry(1, &main[0x0000]); membank("bankr0")->configure_entry(0, &main[0x10000]); membank("bankw0")->configure_entry(0, &main[0x0000]); } DRIVER_INIT_MEMBER( ccs_state, ccs2422 ) { UINT8 *main = memregion("maincpu")->base(); membank("bankr0")->configure_entry(1, &main[0x0000]); membank("bankr0")->configure_entry(0, &main[0x10000]); membank("bankw0")->configure_entry(0, &main[0x0000]); } //************************************* // // Disk // //************************************* static SLOT_INTERFACE_START( ccs_floppies ) SLOT_INTERFACE( "8sssd", FLOPPY_8_SSSD ) SLOT_INTERFACE_END //SLOT_INTERFACE( "525dd", FLOPPY_525_DD ) static MACHINE_CONFIG_START( ccs2810, ccs_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",Z80, XTAL_16MHz / 4) MCFG_CPU_PROGRAM_MAP(ccs2810_mem) MCFG_CPU_IO_MAP(ccs2810_io) MCFG_MACHINE_RESET_OVERRIDE(ccs_state, ccs) /* video hardware */ MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0) MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(ccs_state, kbd_put)) /* Devices */ //MCFG_INS8250_ADD( "ins8250", com_intf, XTAL_1_8432MHz ) MACHINE_CONFIG_END static MACHINE_CONFIG_START( ccs2422, ccs_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",Z80, XTAL_16MHz / 4) MCFG_CPU_PROGRAM_MAP(ccs2810_mem) MCFG_CPU_IO_MAP(ccs2422_io) MCFG_MACHINE_RESET_OVERRIDE(ccs_state, ccs) /* video hardware */ MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0) MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(ccs_state, kbd_put)) /* Devices */ MCFG_MB8877_ADD("fdc", XTAL_16MHz / 8) // UB1793 or MB8877 MCFG_FLOPPY_DRIVE_ADD("fdc:0", ccs_floppies, "8sssd", floppy_image_device::default_floppy_formats) MCFG_FLOPPY_DRIVE_SOUND(true) MACHINE_CONFIG_END /* ROM definition */ ROM_START( ccs2810 ) ROM_REGION( 0x10800, "maincpu", 0 ) ROM_LOAD( "ccs2810.u8", 0x10000, 0x0800, CRC(0c3054ea) SHA1(c554b7c44a61af13decb2785f3c9b33c6fc2bfce)) ROM_END ROM_START( ccs2422 ) ROM_REGION( 0x10800, "maincpu", 0 ) ROM_LOAD( "2422.u24", 0x10000, 0x0800, CRC(6b47586b) SHA1(73ba779a659da4a1f0e22a3fa351a2b36d8456a0)) ROM_REGION( 0x300, "proms", 0 ) ROM_LOAD_OPTIONAL( "2422.u23", 0x0000, 0x0100, CRC(b279cada) SHA1(6cc6e00ec49ba2245c8836d6f09266b09d6e7648)) ROM_LOAD_OPTIONAL( "2422.u22", 0x0100, 0x0100, CRC(e41858bb) SHA1(0be53725032ebea16e32cb720f099551a357e761)) ROM_LOAD_OPTIONAL( "2422.u21", 0x0200, 0x0100, NO_DUMP ) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 1980, ccs2810, 0, 0, ccs2810, ccs2810, ccs_state, ccs2810, "California Computer Systems", "CCS Model 2810 CPU card", MACHINE_NO_SOUND_HW) COMP( 1980, ccs2422, ccs2810, 0, ccs2422, ccs2810, ccs_state, ccs2422, "California Computer Systems", "CCS Model 2422B FDC card", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW)