142 lines
5.0 KiB
Objective-C
142 lines
5.0 KiB
Objective-C
/*
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* PDP-8/E Simulator
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*
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* Copyright © 1994-2015 Bernhard Baehr
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*
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* RK8E.h - RK8-E Disk Cartridge System for the PDP-8/E Simulator
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*
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* This file is part of PDP-8/E Simulator.
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*
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* PDP-8/E Simulator 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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*
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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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*
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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 <http://www.gnu.org/licenses/>.
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*/
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#define COMMAND_CHANGED_NOTIFICATION @"rk8eCommandChangedNotification"
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#define STATUS_CHANGED_NOTIFICATION @"rk8eStatusChangedNotification"
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#define BLOCKNUMBER_CHANGED_NOTIFICATION @"rk8eBlockNumberChangedNotification"
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#define MEMORYADDRESS_CHANGED_NOTIFICATION @"rk8eMemoryAddressChangedNotification"
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/* RK8-E status flags */
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#define STATUS_DONE 04000
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#define STATUS_HEAD_IN_MOTION 02000
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#define STATUS_UNUSED 01000
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#define STATUS_SEEK_FAILED 00400
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#define STATUS_FILE_NOT_READY 00200
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#define STATUS_CONTROL_BUSY 00100
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#define STATUS_TIMING_ERROR 00040
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#define STATUS_WRITE_LOCK_ERROR 00020
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#define STATUS_CRC_ERROR 00010
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#define STATUS_DATA_REQUEST_LATE 00004
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#define STATUS_ERROR 00002
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#define STATUS_CYLINDER_ADDRESS_ERROR 00001
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//#define STATUS_RAISE_FLAG_MASK 04153 // This is the value from PDP-8/E Simulator 1.x. Why?
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#define STATUS_RAISE_FLAG_MASK 04142
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/* RK8-E command bits */
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#define COMMAND_FUNCTION_MASK 07000
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#define COMMAND_FUNCTION_READ 00000
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#define COMMAND_FUNCTION_READ_ALL 01000
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#define COMMAND_FUNCTION_LOCK 02000
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#define COMMAND_FUNCTION_SEEK 03000
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#define COMMAND_FUNCTION_WRITE 04000
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#define COMMAND_FUNCTION_WRITE_ALL 05000
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#define COMMAND_INTERRUPT_ON_DONE 00400
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#define COMMAND_SET_DONE_ON_SEEK_DONE 00200
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#define COMMAND_HALF_BLOCK 00100
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#define COMMAND_EXTENDED_ADDRESS_MASK 00070
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#define COMMAND_DRIVE_SELECT_MASK 00006
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#define COMMAND_BLOCK_NUMBER_MSB 00001
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@class RK05, RK05Controller;
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@interface RK8E : PDP8Plugin <NSCoding>
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{
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@private
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IBOutlet RK05 *rk05_0;
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IBOutlet RK05 *rk05_1;
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IBOutlet RK05 *rk05_2;
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IBOutlet RK05 *rk05_3;
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IBOutlet RK05Controller *rk05Controller_0;
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IBOutlet RK05Controller *rk05Controller_1;
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IBOutlet RK05Controller *rk05Controller_2;
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IBOutlet RK05Controller *rk05Controller_3;
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NSLock *controlLock;
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@public
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/* The attributes are public, so the C functions implementing the PDP-8 instructions can
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access them directly. No other Cocoa code should use them directly. To ensure this,
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the register names are mapped to dummy names with the #defines below. In the source
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codes files with the instruction C functions, #define USE_RK8E_REGISTERS_DIRECTLY
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to make the registers available. */
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RK05 *rk05[4]; // array of the four pointers above set while initialization
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unsigned short command;
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volatile unsigned short status;
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unsigned short block; // 13 bit value
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unsigned short curaddr;
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unsigned long ioflag;
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BOOL maint; // the following registers for maintenance mode
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unsigned short ldb[4]; // lower data buffer
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unsigned char ldbfill; // how many lower data buffers are full
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unsigned short udb; // upper data buffer
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unsigned short crc; // checksum
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unsigned short checkcrc; // needed for check if DMAN can destroy the CRC
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unsigned char shifts; // how many shifts occured for udb or ldb
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unsigned short wordcount; // word count for data breaks
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BOOL shiftEnabled; // DMAN with AC=2000 was issued
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}
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- (unsigned short) getCommand;
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- (void) setCommand:(unsigned short)cmd;
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- (unsigned short) getStatus;
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- (void) setStatus:(unsigned short)stat;
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- (unsigned short) getBlockNumber; // 13 bit value including most significant bit
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- (void) setBlockNumber:(unsigned short)blk; // from command register
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- (unsigned short) getMemoryAddress; // 15 bit value including extended address
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- (void) setMemoryAddress:(unsigned short)addr; // from command register
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- (unsigned short) getCurrentAddress;
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- (void) setCurrentAddress:(unsigned short)addr;
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- (unsigned short) getCurrentDriveNumber;
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- (void) updateStatusMountFlags;
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- (void) setStatusBits:(unsigned)set clearStatusBits:(unsigned)clear;
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- (void) setCRC:(unsigned)newCRC;
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- (BOOL) isCRCOK;
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- (void) lockControl;
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- (void) unlockControl;
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@end
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#if ! USE_RK8E_REGISTERS_DIRECTLY
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#define rk05 __dont_use_rk05__
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#define command __dont_use_command__
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#define status __dont_use_status__
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#define block __dont_use_block__
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#define address __dont_use_address__
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#define curaddr __dont_use_curraddr__
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#define ioflag __dont_use_ioflag__
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#define maint __dont_use_maint__
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#define ldb __dont_use_ldb__
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#define ldbfill __dont_use_ldbfill__
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#define crc __dont_use_crc__
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#define shifts __dont_use_shifts__
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#define wordcount __dont_use_wordcount__
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#define checkcrc __dont_use_checkcrc__
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#define shiftEnabled __dont_use_shiftEnabled__
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#endif
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