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https://github.com/holub/mame
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apple2: Break up handlers for C000-C07F range (nw)
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AJR
parent
d45e9f97d2
commit
26dc424be0
@ -147,8 +147,19 @@ public:
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DECLARE_READ8_MEMBER(ram_r);
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DECLARE_WRITE8_MEMBER(ram_w);
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DECLARE_READ8_MEMBER(c000_r);
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DECLARE_WRITE8_MEMBER(c000_w);
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DECLARE_READ8_MEMBER(keyb_data_r);
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DECLARE_READ8_MEMBER(keyb_strobe_r);
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DECLARE_WRITE8_MEMBER(keyb_strobe_w);
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DECLARE_READ8_MEMBER(cassette_toggle_r);
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DECLARE_WRITE8_MEMBER(cassette_toggle_w);
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DECLARE_READ8_MEMBER(speaker_toggle_r);
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DECLARE_WRITE8_MEMBER(speaker_toggle_w);
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DECLARE_READ8_MEMBER(utility_strobe_r);
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DECLARE_WRITE8_MEMBER(utility_strobe_w);
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DECLARE_READ8_MEMBER(switches_r);
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DECLARE_READ8_MEMBER(flags_r);
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DECLARE_READ8_MEMBER(controller_strobe_r);
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DECLARE_WRITE8_MEMBER(controller_strobe_w);
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DECLARE_WRITE_LINE_MEMBER(txt_w);
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DECLARE_WRITE_LINE_MEMBER(mix_w);
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DECLARE_WRITE_LINE_MEMBER(scr_w);
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@ -201,7 +212,6 @@ private:
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device_a2bus_card_interface *m_slotdevice[8];
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void do_io(address_space &space, int offset);
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uint8_t read_floatingbus();
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};
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@ -483,43 +493,6 @@ uint32_t napple2_state::screen_update_jp(screen_device &screen, bitmap_ind16 &bi
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/***************************************************************************
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I/O
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***************************************************************************/
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// most softswitches don't care about read vs write, so handle them here
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void napple2_state::do_io(address_space &space, int offset)
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{
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if(machine().side_effect_disabled())
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{
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return;
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}
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switch (offset)
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{
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case 0x20:
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m_cassette_state ^= 1;
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m_cassette->output(m_cassette_state ? 1.0f : -1.0f);
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break;
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case 0x30:
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m_speaker_state ^= 1;
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m_speaker->level_w(m_speaker_state);
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break;
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case 0x50: case 0x51: case 0x52: case 0x53: case 0x54: case 0x55: case 0x56: case 0x57:
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case 0x58: case 0x59: case 0x5a: case 0x5b: case 0x5c: case 0x5d: case 0x5e: case 0x5f:
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m_softlatch->write_bit((offset & 0x0e) >> 1, offset & 0x01);
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break;
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case 0x68: // IIgs STATE register, which ProDOS touches
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break;
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case 0x70: case 0x71: case 0x72: case 0x73: case 0x74: case 0x75: case 0x76: case 0x77:
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case 0x78: case 0x79: case 0x7a: case 0x7b: case 0x7c: case 0x7d: case 0x7e: case 0x7f:
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m_joystick_x1_time = machine().time().as_double() + m_x_calibration * m_joy1x->read();
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m_joystick_y1_time = machine().time().as_double() + m_y_calibration * m_joy1y->read();
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m_joystick_x2_time = machine().time().as_double() + m_x_calibration * m_joy2x->read();
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m_joystick_y2_time = machine().time().as_double() + m_y_calibration * m_joy2y->read();
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break;
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}
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}
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WRITE_LINE_MEMBER(napple2_state::txt_w)
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{
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@ -574,34 +547,87 @@ WRITE_LINE_MEMBER(napple2_state::an3_w)
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m_an3 = state;
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}
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READ8_MEMBER(napple2_state::c000_r)
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READ8_MEMBER(napple2_state::keyb_data_r)
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{
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switch (offset)
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{
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case 0x00: // keyboard latch
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// keyboard latch
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return m_transchar | m_strobe;
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}
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case 0x10: // reads any key down, clears strobe
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{
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READ8_MEMBER(napple2_state::keyb_strobe_r)
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{
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// reads any key down, clears strobe
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uint8_t rv = m_transchar | (m_anykeydown ? 0x80 : 0x00);
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if (!machine().side_effect_disabled())
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m_strobe = 0;
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return rv;
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}
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}
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case 0x60: // cassette in
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case 0x68:
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WRITE8_MEMBER(napple2_state::keyb_strobe_w)
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{
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// clear keyboard latch
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m_strobe = 0;
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}
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READ8_MEMBER(napple2_state::cassette_toggle_r)
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{
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if (!machine().side_effect_disabled())
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cassette_toggle_w(space, offset, 0);
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return read_floatingbus();
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}
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WRITE8_MEMBER(napple2_state::cassette_toggle_w)
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{
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m_cassette_state ^= 1;
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m_cassette->output(m_cassette_state ? 1.0f : -1.0f);
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}
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READ8_MEMBER(napple2_state::speaker_toggle_r)
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{
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if (!machine().side_effect_disabled())
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speaker_toggle_w(space, offset, 0);
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return read_floatingbus();
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}
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WRITE8_MEMBER(napple2_state::speaker_toggle_w)
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{
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m_speaker_state ^= 1;
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m_speaker->level_w(m_speaker_state);
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}
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READ8_MEMBER(napple2_state::utility_strobe_r)
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{
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if (!machine().side_effect_disabled())
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utility_strobe_w(space, offset, 0);
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return read_floatingbus();
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}
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WRITE8_MEMBER(napple2_state::utility_strobe_w)
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{
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// pulses pin 5 of game I/O connector
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}
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READ8_MEMBER(napple2_state::switches_r)
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{
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if (!machine().side_effect_disabled())
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m_softlatch->write_bit((offset & 0x0e) >> 1, offset & 0x01);
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return read_floatingbus();
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}
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READ8_MEMBER(napple2_state::flags_r)
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{
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// Y output of 74LS251 at H14 read as D7
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switch (offset)
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{
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case 0: // cassette in
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return m_cassette->input() > 0.0 ? 0x80 : 0;
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case 0x61: // button 0
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case 0x69:
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case 1: // button 0
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return (m_joybuttons->read() & 0x10) ? 0x80 : 0;
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case 0x62: // button 1
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case 0x6a:
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case 2: // button 1
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return (m_joybuttons->read() & 0x20) ? 0x80 : 0;
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case 0x63: // button 2
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case 0x6b:
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case 3: // button 2
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// check if SHIFT key mod configured
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if (m_sysconfig->read() & 0x04)
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{
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@ -609,42 +635,36 @@ READ8_MEMBER(napple2_state::c000_r)
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}
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return (m_joybuttons->read() & 0x40) ? 0x80 : 0;
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case 0x64: // joy 1 X axis
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case 0x6c:
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case 4: // joy 1 X axis
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return (space.machine().time().as_double() < m_joystick_x1_time) ? 0x80 : 0;
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case 0x65: // joy 1 Y axis
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case 0x6d:
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case 5: // joy 1 Y axis
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return (space.machine().time().as_double() < m_joystick_y1_time) ? 0x80 : 0;
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case 0x66: // joy 2 X axis
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case 0x6e:
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case 6: // joy 2 X axis
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return (space.machine().time().as_double() < m_joystick_x2_time) ? 0x80 : 0;
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case 0x67: // joy 2 Y axis
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case 0x6f:
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case 7: // joy 2 Y axis
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return (space.machine().time().as_double() < m_joystick_y2_time) ? 0x80 : 0;
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default:
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do_io(space, offset);
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break;
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}
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// this is never reached
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return 0;
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}
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READ8_MEMBER(napple2_state::controller_strobe_r)
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{
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if (!machine().side_effect_disabled())
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controller_strobe_w(space, offset, 0);
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return read_floatingbus();
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}
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WRITE8_MEMBER(napple2_state::c000_w)
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WRITE8_MEMBER(napple2_state::controller_strobe_w)
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{
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switch (offset)
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{
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case 0x10: // clear keyboard latch
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m_strobe = 0;
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break;
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default:
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do_io(space, offset);
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break;
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}
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m_joystick_x1_time = machine().time().as_double() + m_x_calibration * m_joy1x->read();
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m_joystick_y1_time = machine().time().as_double() + m_y_calibration * m_joy1y->read();
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m_joystick_x2_time = machine().time().as_double() + m_x_calibration * m_joy2x->read();
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m_joystick_y2_time = machine().time().as_double() + m_y_calibration * m_joy2y->read();
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}
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READ8_MEMBER(napple2_state::c080_r)
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@ -925,7 +945,14 @@ WRITE8_MEMBER(napple2_state::ram_w)
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static ADDRESS_MAP_START( apple2_map, AS_PROGRAM, 8, napple2_state )
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AM_RANGE(0x0000, 0xbfff) AM_READWRITE(ram_r, ram_w)
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AM_RANGE(0xc000, 0xc07f) AM_READWRITE(c000_r, c000_w)
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AM_RANGE(0xc000, 0xc000) AM_MIRROR(0xf) AM_READ(keyb_data_r) AM_WRITENOP
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AM_RANGE(0xc010, 0xc010) AM_MIRROR(0xf) AM_READWRITE(keyb_strobe_r, keyb_strobe_w)
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AM_RANGE(0xc020, 0xc020) AM_MIRROR(0xf) AM_READWRITE(cassette_toggle_r, cassette_toggle_w)
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AM_RANGE(0xc030, 0xc030) AM_MIRROR(0xf) AM_READWRITE(speaker_toggle_r, speaker_toggle_w)
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AM_RANGE(0xc040, 0xc04f) AM_MIRROR(0xf) AM_READWRITE(utility_strobe_r, utility_strobe_w)
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AM_RANGE(0xc050, 0xc05f) AM_READ(switches_r) AM_DEVWRITE("softlatch", addressable_latch_device, write_a0)
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AM_RANGE(0xc060, 0xc067) AM_MIRROR(0x8) AM_READ(flags_r) AM_WRITENOP // includes IIgs STATE register, which ProDOS touches
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AM_RANGE(0xc070, 0xc070) AM_MIRROR(0xf) AM_READWRITE(controller_strobe_r, controller_strobe_w)
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AM_RANGE(0xc080, 0xc0ff) AM_READWRITE(c080_r, c080_w)
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AM_RANGE(0xc100, 0xc7ff) AM_READWRITE(c100_r, c100_w)
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AM_RANGE(0xc800, 0xcfff) AM_READWRITE(c800_r, c800_w)
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