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/***************************************************************************
SBC6510 from Josip Perusanec
18/12/2009 Skeleton driver.
2012-08-12 Working [Robbbert]
CPU MOS 6510 (1MHz)
ROM 4KB
RAM 128KB
CIA 6526 - for interrupt gen and scan of keyboard
YM2149/AY-3-8910 - sound + HDD/CF IDE
GAL16V8 - address decoder
ATMEGA8 - gen. of PAL video signal (modified TellyMate)
keyboard of C64 computer used
Commands:
A - (unknown)
C - (unknown)
E - (unknown)
F - (unknown)
G - (unknown)
L - (unknown)
R - (unknown)
S - (unknown)
Some commands expect a filename enclosed in double quotes. If the quotes
are not there, it loops forever looking for them. Good example of bad
programming. There is no help and no error messages.
ToDo:
- The ATMEGA8 is a CPU with Timer, 4 IO ports, UART, ADC, Watchdog all
built in. This enormously complex device needs to be emulated. It also
contains some (4k?) RAM, of which certain addresses have special meaning.
For example bytes 0 and 1 control the serial video stream of bits.
- When the system boots, there is a Y in the top corner. This is actually
Esc-Y, which our terminal does not understand.
- IDE interface.
- Find out the proper way to use the monitor, there are no instructions
and the slightest mistake can freeze the system.
- No software to test with.
****************************************************************************/
#include "emu.h"
#include "cpu/m6502/m6502.h"
#include "machine/6526cia.h"
#include "sound/ay8910.h"
#include "machine/terminal.h"
class sbc6510_state : public driver_device
{
public:
sbc6510_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_terminal(*this, TERMINAL_TAG) { }
DECLARE_READ8_MEMBER(a2_r);
DECLARE_WRITE8_MEMBER(a2_w);
DECLARE_READ8_MEMBER(psg_a_r);
DECLARE_READ8_MEMBER(psg_b_r);
DECLARE_WRITE8_MEMBER(key_w);
DECLARE_READ8_MEMBER(key_r);
UINT8 m_term_data;
UINT8 m_key_row;
UINT8 m_2;
required_device<generic_terminal_device> m_terminal;
};
static ADDRESS_MAP_START( sbc6510_mem, AS_PROGRAM, 8, sbc6510_state )
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x0000, 0x0001) AM_RAM
AM_RANGE(0x0002, 0x0002) AM_READWRITE(a2_r,a2_w)
AM_RANGE(0x0003, 0xdfff) AM_RAM
AM_RANGE(0xE000, 0xE00F) AM_MIRROR(0x1f0) AM_DEVREADWRITE_LEGACY("cia6526", mos6526_r, mos6526_w)
AM_RANGE(0xE800, 0xE800) AM_MIRROR(0x1ff) AM_DEVWRITE_LEGACY("ay8910", ay8910_address_w)
AM_RANGE(0xEA00, 0xEA00) AM_MIRROR(0x1ff) AM_DEVREADWRITE_LEGACY("ay8910", ay8910_r, ay8910_data_w)
AM_RANGE(0xf000, 0xffff) AM_ROM
ADDRESS_MAP_END
/* Input ports */
static INPUT_PORTS_START( sbc6510 ) // cbm keyboard
PORT_START( "X0" )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Crsr Down Up") PORT_CODE(KEYCODE_RALT) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) PORT_CHAR(UCHAR_MAMEKEY(UP))
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F3) PORT_CHAR(UCHAR_MAMEKEY(F5)) PORT_CHAR(UCHAR_MAMEKEY(F6))
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F2) PORT_CHAR(UCHAR_MAMEKEY(F3)) PORT_CHAR(UCHAR_MAMEKEY(F4))
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F1) PORT_CHAR(UCHAR_MAMEKEY(F1)) PORT_CHAR(UCHAR_MAMEKEY(F2))
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F4) PORT_CHAR(UCHAR_MAMEKEY(F7)) PORT_CHAR(UCHAR_MAMEKEY(F8))
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Crsr Right Left") PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) PORT_CHAR(UCHAR_MAMEKEY(LEFT))
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Return") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Del Inst") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) PORT_CHAR(UCHAR_MAMEKEY(INSERT))
PORT_START( "X1" )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Shift (Left)") PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_S) PORT_CHAR('S')
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('Z')
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_W) PORT_CHAR('W')
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
PORT_START( "X2" )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('X')
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('T')
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('R')
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
PORT_START( "X3" )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('V')
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('U')
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_H) PORT_CHAR('H')
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('G')
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('Y')
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
PORT_START( "X4" )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('N')
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_O) PORT_CHAR('O')
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('K')
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('M')
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('J')
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_I) PORT_CHAR('I')
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
PORT_START( "X5" )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('@')
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(':') PORT_CHAR('[')
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('-')
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('L')
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('P')
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('+')
PORT_START( "X6" )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("\xE2\x86\x91 Pi") PORT_CODE(KEYCODE_DEL) PORT_CHAR(0x2191) PORT_CHAR(0x03C0)
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('=')
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Shift (Right)") PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Home Clr") PORT_CODE(KEYCODE_INSERT) PORT_CHAR(UCHAR_MAMEKEY(HOME))
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(';') PORT_CHAR(']')
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('*')
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_BACKSLASH2) PORT_CHAR('\xA3')
PORT_START( "X7" )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Stop Run") PORT_CODE(KEYCODE_HOME)
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Q) PORT_CHAR('Q')
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("CBM") PORT_CODE(KEYCODE_LALT)
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_TAB) PORT_CHAR(UCHAR_SHIFT_2)
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("\xE2\x86\x90") PORT_CODE(KEYCODE_TILDE) PORT_CHAR(0x2190)
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
PORT_START( "X8" ) /* unused */
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Restore") PORT_CODE(KEYCODE_PRTSCR)
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("Shift Lock (switch)") PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK))
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_UNUSED )
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_UNUSED )
INPUT_PORTS_END
READ8_MEMBER( sbc6510_state::a2_r )
{
return m_2;
}
WRITE8_MEMBER( sbc6510_state::a2_w )
{
m_2 = data;
m_terminal->write(space, 0, data);
}
static GENERIC_TERMINAL_INTERFACE( terminal_intf )
{
DEVCB_NULL
};
static MACHINE_RESET(sbc6510)
{
}
static const m6502_interface sbc6510_m6510_interface =
{
NULL,
NULL,
DEVCB_NULL,
DEVCB_NULL
};
READ8_MEMBER( sbc6510_state::psg_a_r )
{
return 0xff;
}
READ8_MEMBER( sbc6510_state::psg_b_r )
{
return 0x7f;
}
// Ports A and B connect to the IDE socket
static const ay8910_interface sbc6510_ay_interface =
{
AY8910_LEGACY_OUTPUT, // flags
AY8910_DEFAULT_LOADS, // channel load in ohms
DEVCB_DRIVER_MEMBER(sbc6510_state, psg_a_r), // port A read
DEVCB_DRIVER_MEMBER(sbc6510_state, psg_b_r), // port B read
DEVCB_NULL, // port A write
DEVCB_NULL // port B write
};
READ8_MEMBER( sbc6510_state::key_r )
{
UINT8 i,data=0;
char kbdrow[6];
for (i = 0; i < 8; i++)
if (!BIT(m_key_row, i))
{
sprintf(kbdrow,"X%X",i);
data |= ioport(kbdrow)->read();
}
return ~data;
}
WRITE8_MEMBER( sbc6510_state::key_w )
{
m_key_row = data;
}
const mos6526_interface cia_intf =
{
10, // time-of-day clock 1/10 second - no idea about this
DEVCB_CPU_INPUT_LINE("maincpu", M6502_IRQ_LINE), // irq
DEVCB_NULL, // pc (timer related) not connected
DEVCB_NULL, // cnt (serial related) not connected
DEVCB_NULL, // sp (serial related) not connected
DEVCB_NULL, // port A in
DEVCB_DRIVER_MEMBER(sbc6510_state, key_w), // port A out
DEVCB_DRIVER_MEMBER(sbc6510_state, key_r), // port B in
DEVCB_NULL // port B out
};
static MACHINE_CONFIG_START( sbc6510, sbc6510_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu",M6510, XTAL_1MHz)
MCFG_CPU_CONFIG( sbc6510_m6510_interface )
MCFG_CPU_PROGRAM_MAP(sbc6510_mem)
MCFG_MACHINE_RESET(sbc6510)
/* video hardware */
MCFG_GENERIC_TERMINAL_ADD(TERMINAL_TAG, terminal_intf)
/* sound hardware */
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("ay8910", AY8910, XTAL_1MHz)
MCFG_SOUND_CONFIG(sbc6510_ay_interface)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
MCFG_MOS6526R1_ADD("cia6526", XTAL_1MHz, cia_intf)
MACHINE_CONFIG_END
/* ROM definition */
ROM_START( sbc6510 )
ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
ROM_LOAD( "sbc6510.rom", 0xf000, 0x1000, CRC(e13a5e62) SHA1(1e7482e9b98b39d0cc456254fbe8fd0981e9377e))
ROM_REGION( 0x2000, "videocpu", ROMREGION_ERASEFF ) // ATMEGA8 at 16MHz
ROM_LOAD( "video.bin", 0x0000, 0x2000, CRC(809f31ce) SHA1(4639de5f7b8f6c036d74f217ba85e7e897039094))
ROM_REGION( 0x200, "gal", ROMREGION_ERASEFF )
ROM_LOAD( "sbc6510.gal", 0x0000, 0x0117, CRC(f78f9927) SHA1(b951163958f5722032826d0d17a07c81dbd5f68e))
ROM_END
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
COMP( 2009, sbc6510, 0, 0, sbc6510, sbc6510, driver_device, 0, "Josip Perusanec", "SBC6510", 0 )
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