trunk/src/mess/drivers/tmtennis.c
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| 45 | 45 | DECLARE_WRITE8_MEMBER(plate_w); |
| 46 | 46 | DECLARE_WRITE8_MEMBER(grid_w); |
| 47 | 47 | |
| 48 | UINT16 m_vfd_state[0x10]; |
| 49 | void update_vfd(); |
| 50 | |
| 48 | 51 | virtual void machine_start(); |
| 49 | 52 | }; |
| 50 | 53 | |
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| 52 | 55 | |
| 53 | 56 | /*************************************************************************** |
| 54 | 57 | |
| 58 | Display |
| 59 | |
| 60 | ***************************************************************************/ |
| 61 | |
| 62 | void tmtennis_state::update_vfd() |
| 63 | { |
| 64 | for (int i = 0; i < 12; i++) |
| 65 | if (m_grid & (1 << i) && m_vfd_state[i] != m_plate) |
| 66 | { |
| 67 | // on difference, send to output |
| 68 | for (int j = 0; j < 12; j++) |
| 69 | output_set_lamp_value(i*100 + j, m_plate >> j & 1); |
| 70 | |
| 71 | m_vfd_state[i] = m_plate; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | |
| 76 | |
| 77 | /*************************************************************************** |
| 78 | |
| 55 | 79 | I/O |
| 56 | 80 | |
| 57 | 81 | ***************************************************************************/ |
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| 84 | 108 | if (offset == NEC_UCOM4_PORTF) offset--; |
| 85 | 109 | int shift = (offset - NEC_UCOM4_PORTC) * 4; |
| 86 | 110 | m_plate = (m_plate & ~(0xf << shift)) | (data << shift); |
| 111 | |
| 112 | update_vfd(); |
| 87 | 113 | } |
| 88 | 114 | |
| 89 | 115 | WRITE8_MEMBER(tmtennis_state::grid_w) |
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| 91 | 117 | // port G/H/I: vfd matrix grid |
| 92 | 118 | int shift = (offset - NEC_UCOM4_PORTG) * 4; |
| 93 | 119 | m_grid = (m_grid & ~(0xf << shift)) | (data << shift); |
| 120 | |
| 121 | update_vfd(); |
| 94 | 122 | } |
| 95 | 123 | |
| 96 | 124 | |
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| 133 | 161 | void tmtennis_state::machine_start() |
| 134 | 162 | { |
| 135 | 163 | // zerofill |
| 164 | memset(m_vfd_state, 0, sizeof(m_vfd_state)); |
| 136 | 165 | m_input_mux = 0; |
| 137 | 166 | m_plate = 0; |
| 138 | 167 | m_grid = 0; |
| 139 | 168 | |
| 140 | 169 | // register for savestates |
| 170 | save_item(NAME(m_vfd_state)); |
| 141 | 171 | save_item(NAME(m_input_mux)); |
| 142 | 172 | save_item(NAME(m_plate)); |
| 143 | 173 | save_item(NAME(m_grid)); |