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| 1 | +// license:BSD-3-Clause |
| 2 | +// copyright-holders:Andrei I. Holub |
| 3 | +/********************************************************************** |
| 4 | + TS-Configuration Copper |
| 5 | +**********************************************************************/ |
| 6 | + |
| 7 | +#include "emu.h" |
| 8 | +#include "tsconf_copper.h" |
| 9 | + |
| 10 | + |
| 11 | +#define LOG_CTRL (1U << 1) |
| 12 | +#define LOG_DATA (1U << 2) |
| 13 | + |
| 14 | +//#define VERBOSE ( LOG_GENERAL /*| LOG_CTRL | LOG_DATA*/ ) |
| 15 | +#include "logmacro.h" |
| 16 | + |
| 17 | +#define LOGCTRL(...) LOGMASKED(LOG_CTRL, __VA_ARGS__) |
| 18 | +#define LOGDATA(...) LOGMASKED(LOG_DATA, __VA_ARGS__) |
| 19 | + |
| 20 | + |
| 21 | +// device type definition |
| 22 | +DEFINE_DEVICE_TYPE(TSCONF_COPPER, tsconf_copper_device, "tsconf_copper", "TS-Configuration Copper") |
| 23 | + |
| 24 | + |
| 25 | +tsconf_copper_device::tsconf_copper_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) |
| 26 | + : device_t(mconfig, TSCONF_COPPER, tag, owner, clock) |
| 27 | + , m_timer(nullptr) |
| 28 | + , m_cl_data(*this, "cl_data", 0x100, ENDIANNESS_LITTLE) |
| 29 | + , m_out_wreg_cb(*this) |
| 30 | + , m_in_dma_ready_cb(*this, 0) |
| 31 | + , m_in_until_pos_cb(*this) |
| 32 | +{ |
| 33 | +} |
| 34 | + |
| 35 | +void tsconf_copper_device::copper_en_w(u8 data) |
| 36 | +{ |
| 37 | + m_en = data != 0xff; |
| 38 | + m_pc = data; |
| 39 | + |
| 40 | + if (m_en) |
| 41 | + { |
| 42 | + LOGCTRL("START\n"); |
| 43 | + m_timer->adjust(attotime::zero); |
| 44 | + } |
| 45 | + else |
| 46 | + { |
| 47 | + LOGCTRL("STOP\n"); |
| 48 | + m_timer->reset(); |
| 49 | + } |
| 50 | +} |
| 51 | + |
| 52 | +void tsconf_copper_device::cl_data_w(u16 addr, u8 data) |
| 53 | +{ |
| 54 | + addr &= 0x1ff; |
| 55 | + LOGDATA("data(W) %02x %04x\n", addr, data); |
| 56 | + m_cl_data[addr >> 1] = (addr & 1) |
| 57 | + ? (m_cl_data[addr >> 1] & 0x00ff) | (data << 8) |
| 58 | + : (m_cl_data[addr >> 1] & 0xff00) | data; |
| 59 | +} |
| 60 | + |
| 61 | +void tsconf_copper_device::dma_ready_w(int status) |
| 62 | +{ |
| 63 | + if(m_en && (status & 1) && (m_cl_data[m_pc] & 0xff0f) == 0b1111'0100'0000'0001) |
| 64 | + { |
| 65 | + ++m_pc; |
| 66 | + m_timer->adjust(attotime::from_hz(clock()), 0); |
| 67 | + } |
| 68 | +} |
| 69 | + |
| 70 | +TIMER_CALLBACK_MEMBER(tsconf_copper_device::timer_callback) |
| 71 | +{ |
| 72 | + const u16 data = m_cl_data[m_pc]; |
| 73 | + if (BIT(data, 12, 4) == 0b1111) // all instructions except WREG |
| 74 | + { |
| 75 | + switch (BIT(data, 8, 4)) |
| 76 | + { |
| 77 | + case 0b0110: //SETA |
| 78 | + m_a = data & 0xff; |
| 79 | + ++m_pc; |
| 80 | + break; |
| 81 | + |
| 82 | + case 0b1000: //SETB |
| 83 | + case 0b1001: |
| 84 | + m_b = data & 0x1ff; |
| 85 | + ++m_pc; |
| 86 | + break; |
| 87 | + |
| 88 | + case 0b0100: // WAIT |
| 89 | + { |
| 90 | + const u8 event = data & 0x0f; |
| 91 | + if (event == param) |
| 92 | + ++m_pc; |
| 93 | + else |
| 94 | + { |
| 95 | + switch (event) |
| 96 | + { |
| 97 | + case 1: // DMA |
| 98 | + m_timer->reset(); |
| 99 | + return; |
| 100 | + break; |
| 101 | + case 2: // frame |
| 102 | + m_timer->adjust(m_in_until_pos_cb(0b00 << 14), 2); |
| 103 | + return; |
| 104 | + break; |
| 105 | + case 3: // line start |
| 106 | + m_timer->adjust(m_in_until_pos_cb(0b11 << 14), 3); |
| 107 | + return; |
| 108 | + break; |
| 109 | + default: |
| 110 | + ++m_pc; |
| 111 | + break; |
| 112 | + |
| 113 | + } |
| 114 | + } |
| 115 | + } |
| 116 | + break; |
| 117 | + |
| 118 | + case 0b0111: // WAITX |
| 119 | + if (param == 0b1111'0111) |
| 120 | + ++m_pc; |
| 121 | + else |
| 122 | + { |
| 123 | + const u8 x = data & 0xff; |
| 124 | + if (x < 224) |
| 125 | + m_timer->adjust(m_in_until_pos_cb(0x8000 | x), 0b1111'0111); |
| 126 | + else |
| 127 | + m_timer->reset(); |
| 128 | + return; |
| 129 | + } |
| 130 | + break; |
| 131 | + |
| 132 | + case 0b1010: // WAITY |
| 133 | + case 0b1011: |
| 134 | + if (param == 0b1111'1010) |
| 135 | + ++m_pc; |
| 136 | + else |
| 137 | + { |
| 138 | + const u16 y = data & 0x1ff; |
| 139 | + if (y < 320) |
| 140 | + m_timer->adjust(m_in_until_pos_cb(0x4000 | y), 0b1111'1010); |
| 141 | + else |
| 142 | + m_timer->reset(); |
| 143 | + return; |
| 144 | + } |
| 145 | + break; |
| 146 | + |
| 147 | + case 0b1100: // DJNZA |
| 148 | + --m_a; |
| 149 | + m_pc = m_a ? data & 0xff : (m_pc + 1); |
| 150 | + break; |
| 151 | + |
| 152 | + case 0b1101: // DJNZB |
| 153 | + --m_b; |
| 154 | + m_pc = m_b ? data & 0xff : (m_pc + 1); |
| 155 | + break; |
| 156 | + |
| 157 | + case 0b1110: // CALL |
| 158 | + m_ret_pc = m_pc + 1; |
| 159 | + m_pc = data & 0xff; |
| 160 | + break; |
| 161 | + |
| 162 | + case 0b1111: // JUMP |
| 163 | + { |
| 164 | + const u8 to = data & 0xff; |
| 165 | + if (to == m_pc) // HALT |
| 166 | + { |
| 167 | + m_en = false; |
| 168 | + m_timer->reset(); |
| 169 | + return; |
| 170 | + } |
| 171 | + |
| 172 | + m_pc = (to == 0xff) ? m_ret_pc : to; |
| 173 | + } |
| 174 | + break; |
| 175 | + |
| 176 | + case 0b0101: // SIGNAL |
| 177 | + ++m_pc; // TODO signal logic |
| 178 | + break; |
| 179 | + |
| 180 | + default: // reserved instructions |
| 181 | + ++m_pc; |
| 182 | + break; |
| 183 | + } |
| 184 | + } |
| 185 | + else |
| 186 | + { |
| 187 | + m_out_wreg_cb((data & 0xff00) | 0xaf, data & 0x00ff); |
| 188 | + ++m_pc; |
| 189 | + } |
| 190 | + |
| 191 | + m_timer->adjust(attotime::from_hz(clock()), 0); |
| 192 | +} |
| 193 | + |
| 194 | + |
| 195 | +void tsconf_copper_device::device_start() |
| 196 | +{ |
| 197 | + m_timer = timer_alloc(FUNC(tsconf_copper_device::timer_callback), this); |
| 198 | + |
| 199 | + m_in_until_pos_cb.resolve_safe(attotime::zero); |
| 200 | + |
| 201 | + save_item(NAME(m_en)); |
| 202 | + save_item(NAME(m_pc)); |
| 203 | + save_item(NAME(m_ret_pc)); |
| 204 | + save_item(NAME(m_a)); |
| 205 | + save_item(NAME(m_b)); |
| 206 | +} |
| 207 | + |
| 208 | +void tsconf_copper_device::device_reset() |
| 209 | +{ |
| 210 | + m_timer->reset(); |
| 211 | + |
| 212 | + m_en = false; |
| 213 | + m_pc = 0; |
| 214 | + m_ret_pc = 0; |
| 215 | + m_a = 0; |
| 216 | + m_b = 0; |
| 217 | +} |
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