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https://github.com/holub/mame
synced 2025-06-23 12:58:37 +03:00
found the rather obvious bug that was actually preventing the 2nd lot of lamps from working..
looked more at the MCU based on studying the (rather short) program, but the hookup so far doesn't work so continue to use the fake 2nd i8279.. it looks like the MCU really just implements a small set of the i8279 features?!
This commit is contained in:
David Haywood
parent
ee236be2e9
commit
0500408a0d
@ -76,6 +76,9 @@
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#include "maygay1b.lh"
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// not yet working
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//#define USE_MCU
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///////////////////////////////////////////////////////////////////////////
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// called if board is reset ///////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////
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@ -417,10 +420,17 @@ static ADDRESS_MAP_START( m1_memmap, AS_PROGRAM, 8, maygay1b_state )
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AM_RANGE(0x2030, 0x2030) AM_DEVREADWRITE("i8279", i8279_device, data_r, data_w )
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AM_RANGE(0x2031, 0x2031) AM_DEVREADWRITE("i8279", i8279_device, status_r, cmd_w)
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#ifdef USE_MCU
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//8051
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AM_RANGE(0x2040, 0x2040) AM_WRITE( main_to_mcu_0_w )
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AM_RANGE(0x2041, 0x2041) AM_WRITE( main_to_mcu_1_w )
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#else
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//8051
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AM_RANGE(0x2040, 0x2040) AM_DEVREADWRITE("i8279_2", i8279_device, data_r, data_w )
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AM_RANGE(0x2041, 0x2041) AM_DEVREADWRITE("i8279_2", i8279_device, status_r, cmd_w)
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// AM_RANGE(0x2050, 0x2050)// SCAN on M1B
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#endif
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AM_RANGE(0x2070, 0x207f) AM_DEVREADWRITE("duart68681", mc68681_device, read, write )
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@ -449,51 +459,6 @@ ADDRESS_MAP_END
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WRITE8_MEMBER(maygay1b_state::mcu_port0_w)
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{
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logerror("%s: mcu_port0_w %02x\n",machine().describe_context(),data);
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}
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WRITE8_MEMBER(maygay1b_state::mcu_port1_w)
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{
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logerror("%s: mcu_port1_w %02x\n",machine().describe_context(),data);
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}
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WRITE8_MEMBER(maygay1b_state::mcu_port2_w)
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{
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logerror("%s: mcu_port2_w %02x\n",machine().describe_context(),data);
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}
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WRITE8_MEMBER(maygay1b_state::mcu_port3_w)
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{
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logerror("%s: mcu_port3_w %02x\n",machine().describe_context(),data);
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}
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READ8_MEMBER(maygay1b_state::mcu_port0_r)
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{
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logerror("%s: mcu_port0_r\n", machine().describe_context());
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return rand();
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}
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READ8_MEMBER(maygay1b_state::mcu_port1_r)
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{
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logerror("%s: mcu_port1_r\n", machine().describe_context());
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return rand();
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}
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static ADDRESS_MAP_START( maygay_mcu_map, AS_PROGRAM, 8, maygay1b_state )
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AM_RANGE(0x0000, 0x0fff) AM_ROM
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ADDRESS_MAP_END
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static ADDRESS_MAP_START( maygay_mcu_io, AS_IO, 8, maygay1b_state )
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AM_RANGE(MCS51_PORT_P0, MCS51_PORT_P0) AM_READWRITE( mcu_port0_r, mcu_port0_w )
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AM_RANGE(MCS51_PORT_P1, MCS51_PORT_P1) AM_READWRITE( mcu_port1_r, mcu_port1_w )
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AM_RANGE(MCS51_PORT_P2, MCS51_PORT_P2) AM_WRITE( mcu_port2_w )
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AM_RANGE(MCS51_PORT_P3, MCS51_PORT_P3) AM_WRITE( mcu_port3_w )
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ADDRESS_MAP_END
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/*************************************************
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*
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* NEC uPD7759 handling (used as OKI replacement)
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@ -543,10 +508,16 @@ static ADDRESS_MAP_START( m1_nec_memmap, AS_PROGRAM, 8, maygay1b_state )
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AM_RANGE(0x2030, 0x2030) AM_DEVREADWRITE("i8279", i8279_device, data_r, data_w )
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AM_RANGE(0x2031, 0x2031) AM_DEVREADWRITE("i8279", i8279_device, status_r, cmd_w)
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#ifdef USE_MCU
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//8051
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AM_RANGE(0x2040, 0x2040) AM_WRITE( main_to_mcu_0_w )
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AM_RANGE(0x2041, 0x2041) AM_WRITE( main_to_mcu_1_w )
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#else
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//8051
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AM_RANGE(0x2040, 0x2040) AM_DEVREADWRITE("i8279_2", i8279_device, data_r, data_w )
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AM_RANGE(0x2041, 0x2041) AM_DEVREADWRITE("i8279_2", i8279_device, status_r, cmd_w)
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// AM_RANGE(0x2050, 0x2050)// SCAN on M1B
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#endif
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AM_RANGE(0x2070, 0x207f) AM_DEVREADWRITE("duart68681", mc68681_device, read, write )
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@ -618,6 +589,11 @@ READ8_MEMBER( maygay1b_state::kbd_r )
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return (m_kbd_ports[m_lamp_strobe&0x07])->read();
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}
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WRITE8_MEMBER( maygay1b_state::scanlines_2_w )
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{
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m_lamp_strobe2 = data;
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}
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WRITE8_MEMBER( maygay1b_state::lamp_data_2_w )
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{
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// TODO: THIS FUNCTION IS NEVER CALLED! So we are missing the second half of the lamp matrix
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@ -640,6 +616,113 @@ WRITE8_MEMBER( maygay1b_state::lamp_data_2_w )
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}
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// MCU hookup not yet working
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WRITE8_MEMBER(maygay1b_state::main_to_mcu_0_w)
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{
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// we trigger the 2nd, more complex interrupt on writes here
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m_main_to_mcu = data;
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m_mcu->set_input_line(1, HOLD_LINE);
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}
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WRITE8_MEMBER(maygay1b_state::main_to_mcu_1_w)
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{
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// we trigger the 1st interrupt on writes here
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// the 1st interrupt (03h) is a very simple one
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// it stores the value written as long at bit 0x40
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// isn't set.
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//
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// this is used as an index, so is probably the
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// row data written with
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// [:maincpu] ':maincpu' (F2CF): unmapped program memory write to 2041 = 8x & FF ( m1glad )
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m_main_to_mcu = data;
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m_mcu->set_input_line(0, HOLD_LINE);
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}
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WRITE8_MEMBER(maygay1b_state::mcu_port0_w)
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{
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#ifdef USE_MCU
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// only during startup
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// logerror("%s: mcu_port0_w %02x\n",machine().describe_context(),data);
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#endif
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}
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WRITE8_MEMBER(maygay1b_state::mcu_port1_w)
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{
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#ifdef USE_MCU
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int bit_offset;
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for (int i = 0; i < 8; i++)
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{
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if (i < 4)
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{
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bit_offset = i + 4;
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}
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else
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{
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bit_offset = i - 4;
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}
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output().set_lamp_value((8 * m_lamp_strobe) + i + 128, ((data & (1 << bit_offset)) != 0));
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}
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#endif
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}
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WRITE8_MEMBER(maygay1b_state::mcu_port2_w)
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{
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#ifdef USE_MCU
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// only during startup
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logerror("%s: mcu_port2_w %02x\n",machine().describe_context(),data);
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#endif
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}
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WRITE8_MEMBER(maygay1b_state::mcu_port3_w)
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{
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#ifdef USE_MCU
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// only during startup
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logerror("%s: mcu_port3_w %02x\n",machine().describe_context(),data);
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#endif
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}
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READ8_MEMBER(maygay1b_state::mcu_port0_r)
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{
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UINT8 ret = m_lamp_strobe;
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#ifdef USE_MCU
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// the MCU code checks to see if the input from this port is stable in
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// the main loop
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// it looks like it needs to read the strobe
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// logerror("%s: mcu_port0_r returning %02x\n", machine().describe_context(), ret);
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#endif
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return ret;
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}
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READ8_MEMBER(maygay1b_state::mcu_port2_r)
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{
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// this is read in BOTH the external interrupts
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// it seems that both the writes from the main cpu go here
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// and the MCU knows which is is based on the interrupt level
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UINT8 ret = m_main_to_mcu;
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#ifdef USE_MCU
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logerror("%s: mcu_port2_r returning %02x\n", machine().describe_context(), ret);
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#endif
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return ret;
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}
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static ADDRESS_MAP_START( maygay_mcu_map, AS_PROGRAM, 8, maygay1b_state )
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AM_RANGE(0x0000, 0x0fff) AM_ROM
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ADDRESS_MAP_END
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static ADDRESS_MAP_START( maygay_mcu_io, AS_IO, 8, maygay1b_state )
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AM_RANGE(MCS51_PORT_P0, MCS51_PORT_P0) AM_READWRITE( mcu_port0_r, mcu_port0_w )
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AM_RANGE(MCS51_PORT_P1, MCS51_PORT_P1) AM_WRITE( mcu_port1_w )
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AM_RANGE(MCS51_PORT_P2, MCS51_PORT_P2) AM_READWRITE( mcu_port2_r, mcu_port2_w )
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AM_RANGE(MCS51_PORT_P3, MCS51_PORT_P3) AM_WRITE( mcu_port3_w )
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ADDRESS_MAP_END
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// machine driver for maygay m1 board /////////////////////////////////
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MACHINE_CONFIG_START( maygay_m1, maygay1b_state )
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@ -650,7 +733,6 @@ MACHINE_CONFIG_START( maygay_m1, maygay1b_state )
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MCFG_CPU_ADD("mcu", I80C51, 2000000) // EP840034.A-P-80C51AVW
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MCFG_CPU_PROGRAM_MAP(maygay_mcu_map)
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MCFG_CPU_IO_MAP(maygay_mcu_io)
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// MCFG_MCS51_SERIAL_TX_CB(WRITE8(maygay1b_state, mcs51_tx_callback))
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MCFG_MC68681_ADD("duart68681", M1_DUART_CLOCK)
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@ -684,9 +766,12 @@ MACHINE_CONFIG_START( maygay_m1, maygay1b_state )
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MCFG_I8279_OUT_DISP_CB(WRITE8(maygay1b_state, lamp_data_w)) // display A&B
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MCFG_I8279_IN_RL_CB(READ8(maygay1b_state, kbd_r)) // kbd RL lines
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// there is no 2nd u8279!
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#ifndef USE_MCU
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// there is no 2nd i8279, the 8051 handles this task!
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MCFG_DEVICE_ADD("i8279_2", I8279, M1_MASTER_CLOCK/4) // unknown clock
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MCFG_I8279_OUT_SL_CB(WRITE8(maygay1b_state, scanlines_2_w)) // scan SL lines
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MCFG_I8279_OUT_DISP_CB(WRITE8(maygay1b_state, lamp_data_2_w)) // display A&B
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#endif
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MCFG_STARPOINT_48STEP_ADD("reel0")
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MCFG_STEPPER_OPTIC_CALLBACK(WRITELINE(maygay1b_state, reel0_optic_cb))
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@ -96,6 +96,7 @@ public:
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DECLARE_WRITE_LINE_MEMBER(reel4_optic_cb) { if (state) m_optic_pattern |= 0x10; else m_optic_pattern &= ~0x10; }
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DECLARE_WRITE_LINE_MEMBER(reel5_optic_cb) { if (state) m_optic_pattern |= 0x20; else m_optic_pattern &= ~0x20; }
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DECLARE_WRITE8_MEMBER(scanlines_w);
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DECLARE_WRITE8_MEMBER(scanlines_2_w);
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DECLARE_WRITE8_MEMBER(lamp_data_w);
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DECLARE_WRITE8_MEMBER(lamp_data_2_w);
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DECLARE_READ8_MEMBER(kbd_r);
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@ -125,7 +126,13 @@ public:
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DECLARE_WRITE8_MEMBER(mcu_port2_w);
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DECLARE_WRITE8_MEMBER(mcu_port3_w);
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DECLARE_READ8_MEMBER(mcu_port0_r);
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DECLARE_READ8_MEMBER(mcu_port1_r);
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DECLARE_READ8_MEMBER(mcu_port2_r);
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DECLARE_WRITE8_MEMBER(main_to_mcu_0_w);
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DECLARE_WRITE8_MEMBER(main_to_mcu_1_w);
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UINT8 m_main_to_mcu;
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DECLARE_DRIVER_INIT(m1);
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DECLARE_DRIVER_INIT(m1common);
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DECLARE_DRIVER_INIT(m1nec);
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