The Programmer's Guide to TRSDOS Version 6 - Tim Mann's Home ...

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7.5 SUPERVISOR CALLS LISTED BY FUNCTION GROUP 7.5.1 Character I/O Name Svc # Purpose @KEY SVC-01 Obtain a character from the *KI device @DSP SVC-02 Character output to *DO (video display) @GET SVC-03 Character input from a device/file @PUT SVC-04 Send a character to a device/file @CTL SVC-05 Control a device chain @PRT SVC-06 Send a character to *PR device @KBD SVC-08 Scan the *KI device @VDCTL SVC-15 Peek/Poke video by row,column @CHNIO SVC-20 Device chain character I/O 7.5.2 Line I/O Name Svc # Purpose @KEYIN SVC-09 Obtain a line of characters from *KI (or JCL) @DSPLY SVC-10 Line output to *DO (video display) @LOGER SVC-11 Send a message to the Job Log (*JL) @LOGOT SVC-12 Display and log a message (*DO and *JL) @MSG SVC-13 Send a message line to a device @PRINT SVC-14 Send a message line to *PR device @VDCTL SVC-15 Video RAM User RAM 7.5.3 Data Conversion Name Svc # Purpose @PARAM SVC-17 Parse a command line of parameters @MUL8 SVC-90 8-bit by 8-bit into 8-bit multiplication @MUL16 SVC-91 16-bit by 8-bit into 24-bit multiplication @DIV8 SVC-93 8-bit by 8-bit unsigned division @DIV16 SVC-94 16-bit by 8-bit unsigned division @DECHEX SVC-96 Convert decimal string to binary @HEXDEC SVC-97 Convert 16-bit binary to ASCII decimal @HEX8 SVC-98 Convert 8-bit binary to ASCII hex @HEX16 SVC-99 Convert 16-bit binary to ASCII hex 7.5.4 Disk Controller Communications Name Svc # Purpose @DCSTAT SVC-40 Test disk controller status @SLCT SVC-41 Select a disk drive @DCINIT SVC-42 Initialize a disk controller @DCRES SVC-43 Reset a disk controller @RSTOR SVC-44 Restore a drive to cylinder 0 @STEPI SVC-45 Issue track step-in to controller @SEEK SVC-46 Seek to a disk cylinder @RSLCT SVC-47 Reselect a busy drive until available @RDHDR SVC-48 Read ID field (where supported) @RDSEC SVC-49 Read a disk sector @VRSEC SVC-50 Verify the readability of a disk sector @RDTRK SVC-51 Read a disk track (where supported) @HDFMT SVC-52 Pass "format device" to controller 7-7
@WRSEC SVC-53 Write a disk sector @WRSSC SVC-54 Write a disk directory sector @WRTRK SVC-55 Write a disk track (format data) 7.5.5 File Access Name Svc # Purpose @GET SVC-03 Character input from a device/file @PUT SVC-04 Send a character to a device/file @BKSP SVC-61 File record backspace @CKEOF SVC-62 Check for file's end-of-file (EOF) @LOC SVC-63 Return file's current record number @LOF SVC-64 Return file's ending record number @PEOF SVC-65 Position to the end of a file @POSN SVC-66 Position to a designated record of a file @READ SVC-67 Read a file record @REW SVC-68 Rewind a file to its beginning @RREAD SVC-69 Reread the last sector read @RWRIT SVC-70 Rewrite the last sector written @SEEKSC SVC-71 Seek a record of a file @SKIP SVC-72 Skip the next record of a file @VER SVC-73 Write then verify a file record @WEOF SVC-74 Directory update a file's end-of-file @WRITE SVC-75 Write a file record 7.5.6 File Control Name Svc # Purpose @RENAM SVC-56 Rename a file on disk @REMOV SVC-57 Remove a file from disk @INIT SVC-58 Open a new or existing file @OPEN SVC-59 Open an existing file @CLOSE SVC-60 Close an open disk file @LOAD SVC-76 Load a program file @RUN SVC-77 Run a program given its filespec @FSPEC SVC-78 Fetch and parse a file specification @FEXT SVC-79 Fetch a default file extension @FNAME SVC-80 Obtain filespec given DEC and drive 7.5.7 System Control Name Svc # Purpose @IPL SVC-00 Reboot the system @VDCTL SVC-15 Various video control functions @PAUSE SVC-16 Delay execution for a time period @ABORT SVC-21 Abnormal program exit @EXIT SVC-22 Exit program with return code @CMNDI SVC-24 Interpret and execute a command @CMNDR SVC-25 Execute a command and return @ERROR SVC-26 Post an error message @DEBUG SVC-27 Enter system DEBUG package @HIGH$ SVC-100 Obtain or alter HIGH$/LOW$ @FLAGS$ SVC-101 Obtain system flags pointer @BANK SVC-102 RAM bank switching @BREAK SVC-103 Establish vector 7-8
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MISOSYS, INC. The Programmer's Guid
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1. Introduction Many thousands of u
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language (i.e. BASIC, C, PASCAL, ..
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NAME START END DESCRIPTION LOWCORE
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ackup utility provides exceptional
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3. Device Input/Output Interfacing
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3.2.2 VECTOR Field - This field in
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FILTER *PR USING *S0 the operating
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===================================
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===================================
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ENTRY JR BEGIN ;Branch around linka
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DATA1 EQU $-DATA$ DB 0 ;Data storag
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Offset Contents +0 Contains the las
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image of the serial port UART statu
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called TRACKs. Each track is then d
Page 31 and 32: The DCT contains the information re
Page 33 and 34: accessed a single-sided diskette, t
Page 35 and 36: containing the disk's directory. Th
Page 37 and 38: Command Purpose RESTORE Recalibrate
Page 39 and 40: available from Logical Systems, Inc
Page 41 and 42: exceeds this capacity, then it must
Page 43 and 44: is two physical cylinders. Although
Page 45 and 46: 5. The DOS Directory Structure 5.1
Page 47 and 48: ===================================
Page 49 and 50: 5.2.8 PACK NAME - This field conta
Page 51 and 52: The position of a file's hash code
Page 53 and 54: 5.4 THE DIRECTORY RECORD STRUCTURE
Page 55 and 56: Bit 3 Specifies the visibility; if
Page 57 and 58: the first granule in use is the sec
Page 59 and 60: travels the turnpike. In this manne
Page 61 and 62: The @FSPEC SVC will transfer the fi
Page 63 and 64: A high level language permits you t
Page 65 and 66: does exist, @RENAME should return e
Page 67 and 68: Next, it would be very useful if th
Page 69 and 70: LD HL,FCBX+9 ;Point to the LRL fiel
Page 71 and 72: operating system for such a purpose
Page 73 and 74: position where the last character i
Page 75 and 76: ecord. If a file has more than four
Page 77 and 78: DE Contains a pointer to the File C
Page 79 and 80: @RENAM SVC-56 Rename a file on disk
Page 81: @FNAME SVC-80 Obtain filespec given
Page 85 and 86: 7.6 SUPERVISOR CALL DETAILS 7.6.1 @
Page 87 and 88: Note: @EXIT in SYS1 automatically r
Page 89 and 90: 7.6.10 @CLOSE SVC-60 This SVC will
Page 91 and 92: 7.6.18 @DCSTAT SVC-40 This SVC pass
Page 93 and 94: Directory to Buffer Entry: B 1; Fun
Page 95 and 96: 7.6.31 @FLAGS$ SVC-101 This SVC wil
Page 97 and 98: NFLAG$ This "network" flag is used
Page 99 and 100: 7.6.32 @FNAME SVC-80 This SVC will
Page 101 and 102: 7.6.40 @HEX8 SVC-98 This SVC will c
Page 103 and 104: 7.6.48 @KLTSK SVC-32 This SVC will
Page 105 and 106: 7.6.57 @OPEN SVC-59 This SVC will o
Page 107 and 108: Registers Affected: AF, BC. Entry:
Page 109 and 110: 0-14 FILENAME/EXT:D - left justifie
Page 111 and 112: 7.6.71 @REMOV SVC-57 This SVC will
Page 113 and 114: Entry: DE A pointer to the FCB cont
Page 115 and 116: Exit: A Error return code, if any.
Page 117 and 118: CURSOR CHARACTER Registers Affected
Page 119 and 120: Exit: A Will contain the error code
Page 121 and 122: esident routine into its execution
Page 123 and 124: CKPAWS LD A,@FLAGS$ ;Get Flags poin
Page 125 and 126: ===================================
Page 127 and 128: The TYPE=0A indicates that it is th
Page 129 and 130: Error 08: Device not available A re
Page 131 and 132: Error 28: End of file encountered T
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8.5 HEADER PROTOCOL OF MEMORY MODUL
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This is obviously an extremely usel
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LD (IX+2),15 JR TASKA By firmly und
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8.7.3 Details of Low Memory Page 2
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actual bank switching. As previousl
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set. Thus, the Z-flag will be indic
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8.10 SYSTEM DISK BOOT TRACK The ope
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14 DEBUG 72 PURGE 1B VERIFY 71 DUMP
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8.13 USING @PARAM The @PARAM SuperV
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DW LPARM+1 DB 'FEED ' ;Line feed pa
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;*=*=* PPARM LD BC,0 ;Zero because
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8.14 TRAP Filter Illustrated ;TRAP/
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8.15 SLASH0 Filter Illustrated ;SLA
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8.16 DMP-500 BOLDFACE Filter Illust
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NOMEM$ DB 'High memory is not avail
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@ @ABORT..........7-2, 7-4, 7-8, 7-
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