mirror of
https://github.com/dingusdev/dingusppc.git
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351 lines
18 KiB
C
351 lines
18 KiB
C
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-24 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** Register definitions for Z85C30. */
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#ifndef Z85C30_H
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#define Z85C30_H
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enum
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{
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WR0 = 0,
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WR1,
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WR2,
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WR3,
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WR4,
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WR5,
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WR6,
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WR7,
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WR8,
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WR9,
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WR10,
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WR11,
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WR12,
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WR13,
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WR14,
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WR15,
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};
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enum
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{
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RR0 = 0,
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RR1,
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RR2,
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RR3,
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RR4,
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RR5,
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RR6,
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RR7,
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RR8,
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RR9,
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RR10,
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RR11,
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RR12,
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RR13,
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RR14,
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RR15,
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};
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enum
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{
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// RR0 - Transmit/Receive Buffer Status and External Status
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RR0_RX_CHARACTER_AVAILABLE = 1 << 0,
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RR0_ZERO_COUNT = 1 << 1,
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RR0_TX_BUFFER_EMPTY = 1 << 2,
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RR0_DCD = 1 << 3,
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RR0_SYNC_HUNT = 1 << 4,
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RR0_CTS = 1 << 5,
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RR0_TX_UNDERRUN_EOM = 1 << 6,
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RR0_BREAK_ABORT = 1 << 7,
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// RR1 - Special Receive Condition status, residue codes, error conditions
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RR1_ALL_SENT = 1 << 0,
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RR1_RESIDUE_CODE_2 = 1 << 1,
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RR1_RESIDUE_CODE_1 = 1 << 2,
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RR1_RESIDUE_CODE_0 = 1 << 3,
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RR1_PARITY_ERROR = 1 << 4,
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RR1_RX_OVERRUN_ERROR = 1 << 5,
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RR1_CRC_FRAMING_ERROR = 1 << 6,
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RR1_END_OF_FRAME_SDLC = 1 << 7,
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// RR2 - Modified (Channel B only) interrupt vector and Unmodified interrupt vector (Channel A only)
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RR2_V0 = 1 << 0,
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RR2_V1 = 1 << 1,
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RR2_V2 = 1 << 2,
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RR2_V3 = 1 << 3,
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RR2_V4 = 1 << 4,
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RR2_V5 = 1 << 5,
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RR2_V6 = 1 << 6,
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RR2_V7 = 1 << 7,
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// RR3 - Interrupt Pending bits (Channel A only)
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RR3_CHANNEL_B_EXT_STAT_IP = 1 << 0,
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RR3_CHANNEL_B_TX_IP = 1 << 1,
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RR3_CHANNEL_B_RX_IP = 1 << 2,
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RR3_CHANNEL_A_EXT_STAT_IP = 1 << 3,
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RR3_CHANNEL_A_TX_IP = 1 << 4,
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RR3_CHANNEL_A_RX_IP = 1 << 5,
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// 0 = 1 << 6,
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// 0 = 1 << 7,
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// RR6 - 14-bit frame byte count (LSB)
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// RR7 - 14-bit frame byte count (MSB), frame status
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RR7_FIFO_OVERFLOW_STATUS = 1 << 7,
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RR7_NORMAL = 0 << 7,
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RR7_FIFO_OVERFLOWED_DURING_OPERATION = 1 << 7,
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RR7_FIFO_DATA_AVAILABLE_STATUS = 1 << 6,
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RR7_STATUS_READS_COME_FROM_SCC = 0 << 6,
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RR7_STATUS_READS_COME_FROM_10_X_9_BIT_FIFO = 1 << 6,
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RR7_FRAME_BYTE_COUNT_MSB = 0x3F,
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// RR8 - Receive Data // Receive buffer
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// RR10 - Miscellaneous XMTR, RCVR status parameters
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// 0 = 1 << 0,
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RR10_ON_LOOP = 1 << 1,
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// 0 = 1 << 2,
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// 0 = 1 << 3,
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RR10_LOOP_SENDING = 1 << 4,
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// 0 = 1 << 5,
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RR10_TWO_CLOCKS_MISSING = 1 << 6,
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RR10_ONE_CLOCK_MISSING = 1 << 7,
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// RR12 - Lower byte of baud rate generator time constant
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// RR13 - Upper byte of baud rate generator time constant
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// RR15 - External/Status interrupt control information
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RR15_SDLC_HDLC_ENHANCEMENT_STATUS = 1 << 0,
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RR15_ZERO_COUNT_IE = 1 << 1,
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RR15_10_X_19_BIT_FRAME_STATUS_FIFO_ENABLE_STATUS = 1 << 2,
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RR15_DCD_IE = 1 << 3,
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RR15_SYNC_HUNT_IE = 1 << 4,
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RR15_CTS_IE = 1 << 5,
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RR15_TX_UNDERRUN_EOM_IE = 1 << 6,
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RR15_BREAK_ABORT_IE = 1 << 7,
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// WR0 - Command Register // Command Register, (Register Pointers), CRC initialization, resets for various modes
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WR0_CRC_RESET_CODES = 3 << 6,
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WR0_RESET_NULL_CODE = 0 << 6,
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WR0_RESET_RX_CRC_CHECKER = 1 << 6,
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WR0_RESET_TX_CRC_GENERATOR = 2 << 6,
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WR0_RESET_TX_UNDERRUN_EOM_LATCH = 3 << 6,
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WR0_COMMAND_CODES = 7 << 3,
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WR0_COMMAND_NULL_CODE = 0 << 3,
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WR0_COMMAND_POINT_HIGH = 1 << 3, // add 8 to Register Selection Code
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WR0_COMMAND_RESET_EXT_STATUS_INTERRUPTS = 2 << 3,
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WR0_COMMAND_SEND_ABORT_SDLC = 3 << 3,
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WR0_COMMAND_ENABLE_INT_ON_NEXT_RX_CHARACTER = 4 << 3,
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WR0_COMMAND_RESET_TXINT_PENDING = 5 << 3,
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WR0_COMMAND_ERROR_RESET = 6 << 3,
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WR0_COMMAND_RESET_HIGHEST_IUS = 7 << 3,
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WR0_REGISTER_SELECTION_CODE = 7 << 0,
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WR0_REGISTER_0 = 0 << 0,
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WR0_REGISTER_1 = 1 << 0,
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WR0_REGISTER_2 = 2 << 0,
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WR0_REGISTER_3 = 3 << 0,
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WR0_REGISTER_4 = 4 << 0,
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WR0_REGISTER_5 = 5 << 0,
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WR0_REGISTER_6 = 6 << 0,
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WR0_REGISTER_7 = 7 << 0,
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// WR1 - Transmit/Receive Interrupt and Data Transfer Mode Definition // Interrupt conditions, Wait/DMA request control
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WR1_WAIT_DMA_REQUEST_ENABLE = 1 << 7,
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WR1_WAIT_DMA_REQUEST_FUNCTION = 1 << 6,
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WR1_WAIT_DMA_REQUEST_ON_RECEIVE_TRANSMIT = 1 << 5,
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WR1_RECEIVE_INTERRUPT_MODES = 3 << 3,
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WR1_RX_INT_DISABLE = 0 << 3,
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WR1_RX_INT_ON_FIRST_CHARACTER_OR_SPECIAL_CONDITION = 1 << 3,
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WR1_INT_ON_ALL_RX_CHARACTERS_OR_SPECIAL_CONDITION = 2 << 3,
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WR1_RX_INT_ON_SPECIAL_CONDITION_ONLY = 3 << 3,
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WR1_PARITY_IS_SPECIAL_CONDITION = 1 << 2,
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WR1_TX_INT_ENABLE = 1 << 1,
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WR1_EXT_INT_ENABLE = 1 << 0,
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// WR2 - Interrupt Vector // Interrupt vector (access through either channel)
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WR2_V0 = 1 << 0,
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WR2_V1 = 1 << 1,
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WR2_V2 = 1 << 2,
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WR2_V3 = 1 << 3,
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WR2_V4 = 1 << 4,
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WR2_V5 = 1 << 5,
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WR2_V6 = 1 << 6,
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WR2_V7 = 1 << 7,
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// WR3 - Receive Parameters and Control // Receive/Control parameters, number of bits per character, Rx CRC enable
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WR3_RECEIVER_BITS_PER_CHARACTER = 3 << 6,
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WR3_BITS_PER_CHARACTER_5 = 0 << 6,
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WR3_BITS_PER_CHARACTER_7 = 1 << 6,
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WR3_BITS_PER_CHARACTER_6 = 2 << 6,
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WR3_BITS_PER_CHARACTER_8 = 3 << 6,
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WR3_AUTO_ENABLES = 1 << 5,
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WR3_ENTER_HUNT_MODE = 1 << 4,
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WR3_RX_CRC_ENABLE = 1 << 3,
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WR3_ADDRESS_SEARCH_MODE_SDLC = 1 << 2,
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WR3_SYNC_CHARACTER_LOAD_INHIBIT = 1 << 1,
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WR3_RX_ENABLE = 1 << 0,
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// WR4 - Transmit/Receiver Miscellaneous Parameters and Modes // Transmit/Receive miscellaneous parameters and codes, clock rate, number of sync characters, stop bits, parity
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WR4_CLOCK_RATE = 3 << 6,
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WR4_X1_CLOCK_MODE = 0 << 6,
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WR4_X16_CLOCK_MODE = 1 << 6,
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WR4_X32_CLOCK_MODE = 2 << 6,
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WR4_X64_CLOCK_MODE = 3 << 6,
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WR4_SYNC_MODE = 3 << 4,
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WR4_MONOSYNC = 0 << 4,
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WR4_BISYNC = 1 << 4,
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WR4_SDLC_MODE = 2 << 4,
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WR4_EXTERNAL_SYNC_MODE = 3 << 4,
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WR4_STOP_BITS = 3 << 2,
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WR4_SYNC_MODES_ENABLE = 0 << 2,
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WR4_STOP_BITS_PER_CHARACTER_1 = 1 << 2,
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WR4_STOP_BITS_PER_CHARACTER_1_AND_HALF = 2 << 2,
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WR4_STOP_BITS_PER_CHARACTER_2 = 3 << 2,
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WR4_PARITY = 1 << 1,
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WR4_PARITY_ODD = 0 << 1,
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WR4_PARITY_EVEN = 1 << 1,
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WR4_PARITY_ENABLE = 1 << 0,
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// WR5 - Transmit Parameter and Controls // Transmit parameters and control, number of Tx bits per character, Tx CRC enable
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WR5_DTR = 1 << 7,
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WR5_TX_BITS_PER_CHARACTER = 3 << 5,
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WR5_TX_5_BITS_OR_LESS_PER_CHARACTER = 0 << 5,
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WR5_TX_7_BITS_PER_CHARACTER = 1 << 5,
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WR5_TX_6_BITS_PER_CHARACTER = 2 << 5,
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WR5_TX_8_BITS_PER_CHARACTER = 3 << 5,
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WR5_SEND_BREAK = 1 << 4,
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WR5_TX_ENABLE = 1 << 3,
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WR5_SDLC_CRC16 = 1 << 2,
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WR5_RTS = 1 << 1,
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WR5_TX_CRC_ENABLE = 1 << 0,
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// WR6 - Sync Characters or SDLC Address Field // Sync character (1st byte) or SDLC address
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// WR7 - Sync Character or SDLCFlag/SDLC Option Register // SYNC character (2nd byte) or SDLC flag
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// WR8 - Transmit buffer
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// WR9 - Master Interrupt Control // Master interrupt control and reset (accessed through either channel), reset bits, control interrupt daisy chain
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WR9_RESET_COMMAND_BITS = 3 << 6,
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WR9_NO_RESET = 0 << 6,
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WR9_CHANNEL_RESET_B = 1 << 6,
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WR9_CHANNEL_RESET_A = 2 << 6,
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WR9_FORCE_HARDWARE_RESET = 3 << 6,
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WR9_INTERRUPT_CONTROL_BITS = 0x3F,
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WR9_INTERRUPT_MASKING_WITHOUT_INTACK = 1 << 5,
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WR9_STATUS_HIGH_STATUS_LOW = 1 << 4,
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WR9_MASTER_INTERRUPT_ENABLE = 1 << 3,
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WR9_DISABLE_LOWER_CHAIN = 1 << 2,
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WR9_NO_VECTOR = 1 << 1,
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WR9_VECTOR_INCLUDES_STATUS = 1 << 0,
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// WR10 - Miscellaneous Transmitter/Receiver Control Bits // Miscellaneous transmitter/receiver control bits, NRZI, NRZ, FM encoding, CRC reset
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WR10_CRC_PRESET = 1 << 7,
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WR10_DATA_ENCODING = 3 << 5,
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WR10_NRZ = 0 << 5,
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WR10_NRZI = 1 << 5,
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WR10_FM1 = 2 << 5,
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WR10_FM0 = 3 << 5,
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WR10_GO_ACTIVE_ON_POLL = 1 << 4,
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WR10_MARK_FLAG_IDLE = 1 << 3,
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WR10_FLAG_IDLE = 0 << 3,
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WR10_MARK_IDLE = 1 << 3,
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WR10_ABORT_FLAG_ON_UNDERRUN = 1 << 2,
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WR10_FLAG_ON_UNDERRUN = 0 << 2,
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WR10_ABORT_ON_UNDERRUN = 1 << 2,
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WR10_LOOP_MODE = 1 << 1,
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WR10_SYNC_SIZE = 1 << 0,
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WR10_SYNC_6_BIT = 0 << 0,
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WR10_SYNC_8_BIT = 1 << 0,
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// WR11 - Clock Mode Control // Clock mode control, source of Rx and Tx clocks
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WR11_RTXC_XTAL_NO_XTAL = 1 << 7,
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WR11_RTXC_NO_XTAL = 0 << 7,
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WR11_RTXC_XTAL = 1 << 7,
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WR11_RECEIVER_CLOCK = 3 << 5,
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WR11_RECEIVE_CLOCK_RTXC_PIN = 0 << 5,
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WR11_RECEIVE_CLOCK_TRXC_PIN = 1 << 5,
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WR11_RECEIVE_CLOCK_BR_GENERATOR_OUTPUT = 2 << 5,
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WR11_RECEIVE_CLOCK_DPLL_OUTPUT = 3 << 5,
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WR11_TRANSMIT_CLOCK = 3 << 3,
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WR11_TRANSMIT_CLOCK_RTXC_PIN = 0 << 3,
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WR11_TRANSMIT_CLOCK_TRXC_PIN = 1 << 3,
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WR11_TRANSMIT_CLOCK_BR_GENERATOR_OUTPUT = 2 << 3,
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WR11_TRANSMIT_CLOCK_DPLL_OUTPUT = 3 << 3,
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WR11_TRXC_O_I = 1 << 2,
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WR11_TRXC_OUTPUT_SOURCE = 3 << 0,
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WR11_TRXC_OUT_XTAL_OUTPUT = 0 << 0,
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WR11_TRXC_OUT_TRANSMIT_CLOCK = 1 << 0,
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WR11_TRXC_OUT_BR_GENERATOR_OUTPUT = 2 << 0,
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WR11_TRXC_OUT_DPLL_OUTPUT = 3 << 0,
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// WR12 - Lower Byte of Baud Rate Generator Time Constant
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// WR13 - Upper Byte of Baud Rate Generator Time Constant
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// WR14 - Miscellaneous Control Bits // Miscellaneous control bits: baud rate generator, Phase-Locked Loop control, auto echo, local loopback
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WR14_DPLL_COMMAND_BITS = 7 << 5,
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WR14_DPLL_NULL_COMMAND = 0 << 5,
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WR14_DPLL_ENTER_SEARCH_MODE = 1 << 5,
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WR14_DPLL_RESET_MISSING_CLOCK = 2 << 5,
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WR14_DPLL_DISABLE_DPLL = 3 << 5,
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WR14_DPLL_SET_SOURCE_BR_GENERATOR = 4 << 5,
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WR14_DPLL_SET_SOURCE_RTXC = 5 << 5,
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WR14_DPLL_SET_FM_MODE = 6 << 5,
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WR14_DPLL_SET_NRZI_MODE = 7 << 5,
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WR14_LOCAL_LOOPBACK = 1 << 4,
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WR14_AUTO_ECHO = 1 << 3,
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WR14_DTR_REQUEST_FUNCTION = 1 << 2,
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WR14_BR_GENERATOR_SOURCE = 1 << 1,
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WR14_BR_GENERATOR_ENABLE = 1 << 0,
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// WR15 - External/Status Interrupt Control // External/Status interrupt control information-control external conditions causing interrupts
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WR15_SDLC_HDLC_ENHANCEMENT_ENABLE = 1 << 0,
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WR15_ZERO_COUNT_IE = 1 << 1,
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WR15_10_X_19_BIT_FRAME_STATUS_FIFO_ENABLE = 1 << 2,
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WR15_DCD_IE = 1 << 3,
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WR15_SYNC_HUNT_IE = 1 << 4,
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WR15_CTS_IE = 1 << 5,
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WR15_TX_UNDERRUN_EOM_IE = 1 << 6,
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WR15_BREAK_ABORT_IE = 1 << 7,
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};
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#endif // Z85C30_H
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