PDP-8-E-Simulator/RK8E/RK8E.h

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/*
* PDP-8/E Simulator
*
* Copyright © 1994-2015 Bernhard Baehr
*
* RK8E.h - RK8-E Disk Cartridge System for the PDP-8/E Simulator
*
* This file is part of PDP-8/E Simulator.
*
* PDP-8/E Simulator is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define COMMAND_CHANGED_NOTIFICATION @"rk8eCommandChangedNotification"
#define STATUS_CHANGED_NOTIFICATION @"rk8eStatusChangedNotification"
#define BLOCKNUMBER_CHANGED_NOTIFICATION @"rk8eBlockNumberChangedNotification"
#define MEMORYADDRESS_CHANGED_NOTIFICATION @"rk8eMemoryAddressChangedNotification"
/* RK8-E status flags */
#define STATUS_DONE 04000
#define STATUS_HEAD_IN_MOTION 02000
#define STATUS_UNUSED 01000
#define STATUS_SEEK_FAILED 00400
#define STATUS_FILE_NOT_READY 00200
#define STATUS_CONTROL_BUSY 00100
#define STATUS_TIMING_ERROR 00040
#define STATUS_WRITE_LOCK_ERROR 00020
#define STATUS_CRC_ERROR 00010
#define STATUS_DATA_REQUEST_LATE 00004
#define STATUS_ERROR 00002
#define STATUS_CYLINDER_ADDRESS_ERROR 00001
//#define STATUS_RAISE_FLAG_MASK 04153 // This is the value from PDP-8/E Simulator 1.x. Why?
#define STATUS_RAISE_FLAG_MASK 04142
/* RK8-E command bits */
#define COMMAND_FUNCTION_MASK 07000
#define COMMAND_FUNCTION_READ 00000
#define COMMAND_FUNCTION_READ_ALL 01000
#define COMMAND_FUNCTION_LOCK 02000
#define COMMAND_FUNCTION_SEEK 03000
#define COMMAND_FUNCTION_WRITE 04000
#define COMMAND_FUNCTION_WRITE_ALL 05000
#define COMMAND_INTERRUPT_ON_DONE 00400
#define COMMAND_SET_DONE_ON_SEEK_DONE 00200
#define COMMAND_HALF_BLOCK 00100
#define COMMAND_EXTENDED_ADDRESS_MASK 00070
#define COMMAND_DRIVE_SELECT_MASK 00006
#define COMMAND_BLOCK_NUMBER_MSB 00001
@class RK05, RK05Controller;
@interface RK8E : PDP8Plugin <NSCoding>
{
@private
IBOutlet RK05 *rk05_0;
IBOutlet RK05 *rk05_1;
IBOutlet RK05 *rk05_2;
IBOutlet RK05 *rk05_3;
IBOutlet RK05Controller *rk05Controller_0;
IBOutlet RK05Controller *rk05Controller_1;
IBOutlet RK05Controller *rk05Controller_2;
IBOutlet RK05Controller *rk05Controller_3;
NSLock *controlLock;
@public
/* The attributes are public, so the C functions implementing the PDP-8 instructions can
access them directly. No other Cocoa code should use them directly. To ensure this,
the register names are mapped to dummy names with the #defines below. In the source
codes files with the instruction C functions, #define USE_RK8E_REGISTERS_DIRECTLY
to make the registers available. */
RK05 *rk05[4]; // array of the four pointers above set while initialization
unsigned short command;
volatile unsigned short status;
unsigned short block; // 13 bit value
unsigned short curaddr;
unsigned long ioflag;
BOOL maint; // the following registers for maintenance mode
unsigned short ldb[4]; // lower data buffer
unsigned char ldbfill; // how many lower data buffers are full
unsigned short udb; // upper data buffer
unsigned short crc; // checksum
unsigned short checkcrc; // needed for check if DMAN can destroy the CRC
unsigned char shifts; // how many shifts occured for udb or ldb
unsigned short wordcount; // word count for data breaks
BOOL shiftEnabled; // DMAN with AC=2000 was issued
}
- (unsigned short) getCommand;
- (void) setCommand:(unsigned short)cmd;
- (unsigned short) getStatus;
- (void) setStatus:(unsigned short)stat;
- (unsigned short) getBlockNumber; // 13 bit value including most significant bit
- (void) setBlockNumber:(unsigned short)blk; // from command register
- (unsigned short) getMemoryAddress; // 15 bit value including extended address
- (void) setMemoryAddress:(unsigned short)addr; // from command register
- (unsigned short) getCurrentAddress;
- (void) setCurrentAddress:(unsigned short)addr;
- (unsigned short) getCurrentDriveNumber;
- (void) updateStatusMountFlags;
- (void) setStatusBits:(unsigned)set clearStatusBits:(unsigned)clear;
- (void) setCRC:(unsigned)newCRC;
- (BOOL) isCRCOK;
- (void) lockControl;
- (void) unlockControl;
@end
#if ! USE_RK8E_REGISTERS_DIRECTLY
#define rk05 __dont_use_rk05__
#define command __dont_use_command__
#define status __dont_use_status__
#define block __dont_use_block__
#define address __dont_use_address__
#define curaddr __dont_use_curraddr__
#define ioflag __dont_use_ioflag__
#define maint __dont_use_maint__
#define ldb __dont_use_ldb__
#define ldbfill __dont_use_ldbfill__
#define crc __dont_use_crc__
#define shifts __dont_use_shifts__
#define wordcount __dont_use_wordcount__
#define checkcrc __dont_use_checkcrc__
#define shiftEnabled __dont_use_shiftEnabled__
#endif