// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** CCS Model 300 2009-12-11 Skeleton driver. It requires a floppy disk to boot from. There's no info available on this system, however the bankswitching appears to be the same as their other systems. Early on, it does a read from port F2. If bit 3 is low, the system becomes a Model 400. Since IM2 is used, it is assumed there are Z80 peripherals on board. There's unknown usage of ports 11 thru 1B, 34, and F0 thru F2. ****************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "machine/terminal.h" #define TERMINAL_TAG "terminal" class ccs300_state : public driver_device { public: ccs300_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) { } DECLARE_DRIVER_INIT(ccs300); DECLARE_MACHINE_RESET(ccs300); DECLARE_READ8_MEMBER(port10_r); DECLARE_READ8_MEMBER(port11_r); DECLARE_WRITE8_MEMBER(port10_w); DECLARE_WRITE8_MEMBER(port40_w); DECLARE_WRITE8_MEMBER(kbd_put); private: UINT8 m_term_data; required_device m_maincpu; required_device m_terminal; }; static ADDRESS_MAP_START(ccs300_mem, AS_PROGRAM, 8, ccs300_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0x07ff) AM_READ_BANK("bankr0") AM_WRITE_BANK("bankw0") AM_RANGE(0x0800, 0xffff) AM_RAM ADDRESS_MAP_END static ADDRESS_MAP_START( ccs300_io, AS_IO, 8, ccs300_state) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x10, 0x10) AM_READWRITE(port10_r,port10_w) AM_RANGE(0x11, 0x11) AM_READ(port11_r) AM_RANGE(0x40, 0x40) AM_WRITE(port40_w) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( ccs300 ) INPUT_PORTS_END //************************************* // // Keyboard // //************************************* READ8_MEMBER( ccs300_state::port10_r ) { UINT8 ret = m_term_data; m_term_data = 0; return ret; } READ8_MEMBER( ccs300_state::port11_r ) { return (m_term_data) ? 5 : 4; } WRITE8_MEMBER( ccs300_state::port10_w ) { m_terminal->write(space, 0, data & 0x7f); } WRITE8_MEMBER( ccs300_state::kbd_put ) { m_term_data = data; } //************************************* // // Machine // //************************************* WRITE8_MEMBER( ccs300_state::port40_w ) { membank("bankr0")->set_entry( (data) ? 1 : 0); } MACHINE_RESET_MEMBER( ccs300_state, ccs300 ) { membank("bankr0")->set_entry(0); // point at rom membank("bankw0")->set_entry(0); // always write to ram } DRIVER_INIT_MEMBER( ccs300_state, ccs300 ) { 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]); } static MACHINE_CONFIG_START( ccs300, ccs300_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",Z80, XTAL_4MHz) MCFG_CPU_PROGRAM_MAP(ccs300_mem) MCFG_CPU_IO_MAP(ccs300_io) MCFG_MACHINE_RESET_OVERRIDE(ccs300_state, ccs300) /* video hardware */ MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0) MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(ccs300_state, kbd_put)) MACHINE_CONFIG_END /* ROM definition */ ROM_START( ccs300 ) ROM_REGION( 0x10800, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD( "ccs300.rom", 0x10000, 0x0800, CRC(6cf22e31) SHA1(9aa3327cd8c23d0eab82cb6519891aff13ebe1d0)) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 19??, ccs300, ccs2810, 0, ccs300, ccs300, ccs300_state, ccs300, "California Computer Systems", "CCS Model 300", MACHINE_IS_SKELETON )