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(MESS) instructor50 : Added interrupt logic. Connected up remaining keys.

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This commit is contained in:
Robbbert 2013-10-25 16:46:10 +00:00
parent 9c7ff6a3bc
commit 6812ae93ef
1 changed files with 48 additions and 12 deletions
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60
src/mess/drivers/instruct.c
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@ -33,11 +33,10 @@
completion of a successful load, HELLO will be displayed.
ToDO:
- Keys are mostly correct. The SENS, INT, MON, RST keys are
not in the matrix, but are connected to hardware directly. This needs
to be emulated. (SENS key done)
- Connect 10 toggle switches and 10 round red leds.
- Hook up the Interrupt Block unit.
- 2 proms
- Last Address Register
- Initial Jump Logic
****************************************************************************/
@ -67,7 +66,7 @@ public:
DECLARE_WRITE8_MEMBER(portf8_w);
DECLARE_WRITE8_MEMBER(portf9_w);
DECLARE_WRITE8_MEMBER(portfa_w);
DECLARE_QUICKLOAD_LOAD_MEMBER( instruct );
DECLARE_QUICKLOAD_LOAD_MEMBER(instruct);
INTERRUPT_GEN_MEMBER(t2l_int);
private:
virtual void machine_reset();
@ -150,9 +149,38 @@ READ8_MEMBER( instruct_state::sense_r )
INTERRUPT_GEN_MEMBER( instruct_state::t2l_int )
{
m_irqstate ^= 1;
//device.execute().set_input_line(0, m_irqstate);
device.execute().set_input_line_and_vector(0, m_irqstate, 0x87); // unknown vector, guess
UINT8 hwkeys = ioport("HW")->read();
// check RST key
if BIT(hwkeys, 3)
{
m_maincpu->set_state_int(S2650_PC, 0);
return;
}
else
// check MON key
if BIT(hwkeys, 2)
{
m_maincpu->set_state_int(S2650_PC, 0x1800);
return;
}
else
{
UINT8 switches = ioport("SW")->read();
// Set vector from INDIRECT sw
UINT8 vector = BIT(switches, 0) ? 0x87 : 0x07;
// Check INT sw & key
if BIT(switches, 1)
device.execute().set_input_line_and_vector(0, BIT(hwkeys, 1) ? ASSERT_LINE : CLEAR_LINE, vector);
else
// process ac input
{
m_irqstate ^= 1;
device.execute().set_input_line_and_vector(0, m_irqstate ? ASSERT_LINE : CLEAR_LINE, vector);
}
}
}
static ADDRESS_MAP_START( instruct_mem, AS_PROGRAM, 8, instruct_state )
@ -220,9 +248,17 @@ static INPUT_PORTS_START( instruct )
PORT_START("HW")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("SENS") PORT_CODE(KEYCODE_U) PORT_CHAR('U')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("INT") PORT_CODE(KEYCODE_I) PORT_CHAR('I')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("MON") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RST") PORT_CODE(KEYCODE_P) PORT_CHAR('P')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("INT") PORT_CODE(KEYCODE_I) PORT_CHAR('I')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("MON") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("RST") PORT_CODE(KEYCODE_P) PORT_CHAR('P')
PORT_START("SW")
PORT_DIPNAME( 0x01, 0x00, "INT") // Interrupt jumps to 0007 or *0007
PORT_DIPSETTING( 0x01, "Indirect")
PORT_DIPSETTING( 0x00, "Direct")
PORT_DIPNAME( 0x02, 0x00, "AC/INT") // Interrupt comes from INT key or from power supply
PORT_DIPSETTING( 0x02, "INT")
PORT_DIPSETTING( 0x00, "AC")
INPUT_PORTS_END
@ -323,7 +359,7 @@ static MACHINE_CONFIG_START( instruct, instruct_state )
MCFG_CPU_ADD("maincpu",S2650, XTAL_3_579545MHz / 4)
MCFG_CPU_PROGRAM_MAP(instruct_mem)
MCFG_CPU_IO_MAP(instruct_io)
MCFG_CPU_PERIODIC_INT_DRIVER(instruct_state, t2l_int, 100)
MCFG_CPU_PERIODIC_INT_DRIVER(instruct_state, t2l_int, 120)
/* video hardware */
MCFG_DEFAULT_LAYOUT(layout_instruct)