mirror of
https://github.com/dingusdev/dingusppc.git
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79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-21 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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/** @file Sander-Wozniak Machine 3 (SWIM3) definitions. */
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#ifndef SWIM3_H
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#define SWIM3_H
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#include "superdrive.h"
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#include <cinttypes>
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#include <memory>
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/** SWIM3 registers offsets. */
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namespace Swim3 {
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enum Swim3Reg : uint8_t {
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Data = 0,
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Timer = 1,
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Error = 2,
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Param_Data = 3,
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Phase = 4,
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Setup = 5,
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Status_Mode0 = 6, // read: Status, write: zeroes to the mode register
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Handshake_Mode1 = 7, // read: Handshake, write: ones to the mode register
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Interrupt = 8,
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Step = 9,
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Current_Track = 10,
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Current_Sector = 11,
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Gap_Format = 12,
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First_Sector = 13,
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Sectors_To_Xfer = 14,
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Interrupt_Mask = 15
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};
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class Swim3Ctrl {
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public:
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Swim3Ctrl();
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~Swim3Ctrl() = default;
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// SWIM3 registers access
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uint8_t read(uint8_t reg_offset);
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void write(uint8_t reg_offset, uint8_t value);
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private:
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std::unique_ptr<MacSuperdrive::MacSuperDrive> int_drive;
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uint8_t setup_reg;
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uint8_t mode_reg;
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uint8_t phase_lines;
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uint8_t int_reg;
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uint8_t int_mask;
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uint8_t pram; // parameter RAM: two nibbles = {late_time, early_time}
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uint8_t first_sec;
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uint8_t xfer_cnt;
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};
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}; // namespace Swim3
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#endif // SWIM3_H
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