mirror of
https://github.com/holub/mame
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135 lines
4.0 KiB
C
135 lines
4.0 KiB
C
/******************************************************************************************
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Commodore C900
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UNIX prototype
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http://www.zimmers.net/cbmpics/c900.html
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http://www.zimmers.net/cbmpics/cbm/900/c900-chips.txt
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Chips: Z8001 CPU, Z8010 MMU, Z8030 SCC, Z8036 CIO. Crystal: 12MHz
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The Z8030 runs 2 serial ports. The Z8036 runs the IEEE interface and the speaker.
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The FDC is an intelligent device that communicates with the main board via the MMU.
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It has a 6508 CPU.
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*******************************************************************************************/
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#include "emu.h"
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#include "cpu/z8000/z8000.h"
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#include "machine/terminal.h"
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class c900_state : public driver_device
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{
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public:
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c900_state(const machine_config &mconfig, device_type type, const char *tag)
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: driver_device(mconfig, type, tag)
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, m_maincpu(*this, "maincpu")
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, m_terminal(*this, TERMINAL_TAG)
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{ }
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DECLARE_READ16_MEMBER(port1e_r);
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DECLARE_READ16_MEMBER(key_r);
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DECLARE_READ16_MEMBER(stat_r);
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DECLARE_WRITE8_MEMBER(kbd_put);
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private:
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UINT8 m_term_data;
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required_device<cpu_device> m_maincpu;
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required_device<generic_terminal_device> m_terminal;
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};
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static ADDRESS_MAP_START(c900_mem, AS_PROGRAM, 16, c900_state)
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AM_RANGE(0x00000, 0x07fff) AM_ROM AM_REGION("roms", 0)
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ADDRESS_MAP_END
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static ADDRESS_MAP_START(c900_data, AS_DATA, 16, c900_state)
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AM_RANGE(0x00000, 0x07fff) AM_ROM AM_REGION("roms", 0)
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AM_RANGE(0x08000, 0x6ffff) AM_RAM
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ADDRESS_MAP_END
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static ADDRESS_MAP_START(c900_io, AS_IO, 16, c900_state)
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AM_RANGE(0x0010, 0x0011) AM_READ(stat_r)
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AM_RANGE(0x001A, 0x001B) AM_READ(key_r)
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AM_RANGE(0x001E, 0x001F) AM_READ(port1e_r)
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AM_RANGE(0x0100, 0x0101) AM_READ(stat_r)
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AM_RANGE(0x0110, 0x0111) AM_READ(key_r) AM_DEVWRITE8(TERMINAL_TAG, generic_terminal_device, write, 0x00ff)
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ADDRESS_MAP_END
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static INPUT_PORTS_START( c900 )
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INPUT_PORTS_END
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READ16_MEMBER( c900_state::port1e_r )
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{
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return 0;
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}
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READ16_MEMBER( c900_state::key_r )
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{
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UINT8 ret = m_term_data;
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m_term_data = 0;
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return ret;
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}
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READ16_MEMBER( c900_state::stat_r )
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{
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return (m_term_data) ? 6 : 4;
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}
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WRITE8_MEMBER( c900_state::kbd_put )
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{
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m_term_data = data;
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}
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static GENERIC_TERMINAL_INTERFACE( terminal_intf )
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{
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DEVCB_DRIVER_MEMBER(c900_state, kbd_put)
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};
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/* F4 Character Displayer */
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static const gfx_layout c900_charlayout =
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{
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8, 16, /* 8 x 16 characters */
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256, /* 256 characters */
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1, /* 1 bits per pixel */
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{ 0 }, /* no bitplanes */
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/* x offsets */
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{ 0, 1, 2, 3, 4, 5, 6, 7 },
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/* y offsets */
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{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, 15*8 },
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8*16 /* every char takes 16 bytes */
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};
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static GFXDECODE_START( c900 )
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GFXDECODE_ENTRY( "chargen", 0x0000, c900_charlayout, 0, 1 )
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GFXDECODE_END
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static MACHINE_CONFIG_START( c900, c900_state )
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/* basic machine hardware */
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MCFG_CPU_ADD("maincpu", Z8001, XTAL_12MHz / 2)
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MCFG_CPU_PROGRAM_MAP(c900_mem)
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MCFG_CPU_DATA_MAP(c900_data)
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MCFG_CPU_IO_MAP(c900_io)
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MCFG_GENERIC_TERMINAL_ADD(TERMINAL_TAG, terminal_intf)
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MCFG_GFXDECODE(c900)
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MCFG_PALETTE_LENGTH(2)
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MCFG_PALETTE_INIT_OVERRIDE(driver_device, black_and_white)
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MACHINE_CONFIG_END
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ROM_START( c900 )
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ROM_REGION16_LE( 0x8000, "roms", 0 )
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ROM_LOAD16_BYTE( "c 900 boot-h v 1.0.bin.u17", 0x0001, 0x4000, CRC(c3aa7fc1) SHA1(ff12dd100fa7b1e7e931e9a8ef4c4f5cc056e099) )
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ROM_LOAD16_BYTE( "c 900 boot-l v 1.0.bin.u18", 0x0000, 0x4000, CRC(0aa39272) SHA1(b2c5da4586d38fc66bb33aafeae4dbda36080f1e) )
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ROM_REGION( 0x2000, "fdc", 0 )
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ROM_LOAD( "s41_6-20-85.bin", 0x0000, 0x2000, CRC(ec245721) SHA1(4cc19014b4887833a56b1236dc5fe39cc5d7b5c3) )
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ROM_REGION( 0x1000, "chargen", 0 ) // this must be for the c900 terminal as the mainframe has no video output
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ROM_LOAD( "380217-01.u2", 0x0000, 0x1000, CRC(64cb4171) SHA1(e60d796170addfd27e2c33090f9c512c7e3f99f5) )
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ROM_END
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/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
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COMP( 1985, c900, 0, 0, c900, c900, driver_device, 0, "Commodore", "Commodore 900", GAME_IS_SKELETON )
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