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> DOS > Pipes and Redirections |
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nop
its been done
 and old msdos source is publicly avalible now
source for dos v2.0 more paginate prog below with includes expanded but its masm 
| is pipe where output of first prog becomes input to second prog < is stdin redirection from file > is stdout redirection to file Code: TITLE MORE MS-DOS Paginate Filter FALSE EQU 0 TRUE EQU NOT FALSE IBMVER EQU TRUE KANJI EQU FALSE MSVER EQU FALSE ; INCLUDE DOSSYM.ASM ; DOSSYM.ASM ;include DOSMAC.ASM ; DOSMAC.ASM ; Macro file for MSDOS. ; SUBTTL BREAK a listing into pages and give new subtitles PAGE BREAK MACRO subtitle SUBTTL subtitle PAGE ENDM BREAK <I_NEED: declare a variable external, if necessary, and allocate a size> ; ; declare a variable external and allocate a size ; I_NEED MACRO sym,len CODE ENDS DATA SEGMENT BYTE PUBLIC 'DATA' IFIDN <len>,<WORD> EXTRN &sym:WORD ELSE IFIDN <len>,<DWORD> EXTRN &sym:DWORD ELSE EXTRN &sym:BYTE ENDIF ENDIF DATA ENDS CODE SEGMENT BYTE PUBLIC 'CODE' ENDM ; ; call a procedure that may be external. The call will be short. ; invoke MACRO name &.xcref add_ext name,near &.cref CALL name ENDM PAGE ; ; jump to a label that may be external. The call will be near. ; transfer MACRO name &.xcref add_ext name,near &.cref JUMP name ENDM ; ; get a short address in a word ; short_addr MACRO name IFDIF <name>,<?> &.xcref add_ext name,near &.cref DW OFFSET DOSGROUP:name ELSE DW ? ENDIF ENDM ; ; get a long address in a dword ; long_addr MACRO name &.xcref add_ext name,far &.cref DD name ENDM ; ; declare a PROC near or far but PUBLIC nonetheless ; procedure MACRO name,distance PUBLIC name name PROC distance ENDM PAGE ; ; define a data item to be public and of an appropriate size/type ; I_AM MACRO name,size PUBLIC name IFIDN <size>,<WORD> name DW ? ELSE IFIDN <size>,<DWORD> name DD ? ELSE IFIDN <size>,<BYTE> name DB ? ELSE name DB size DUP (?) ENDIF ENDIF ENDIF ENDM PAGE ; ; play games with a possible external. Create a new ; macro for the symbol and text, and string it together ; with a central invoker ; .xcref .xcref ?i .xcref def_mac .xcref ?z0 .xcref add_ext .cref IF1 ?i=0 ENDIF ?z0 macro endm ; ; add an external declaration to s with type t if it is not defined ; add_ext macro s,t &.xcref &.xcref ?&s &.cref IFNDEF ?&s ?i = ?i + 1 def_mac ?z&%?i,?z&%(?i-1),s,t ENDIF endm ; ; define a macro called that possibly externals s:t and then calls macro n ; def_mac macro m,n,s,t &.xcref &.xcref ?&s &.xcref m &.cref m macro ifndef s extrn s:&t endif purge m purge ?&s n endm ?&s macro &endm endm ; ; call the macro chain ; do_ext macro &.xcref expand_mac ?z%?i &.cref endm PAGE expand_mac macro m m endm ; ; define an entry in a procedure ; entry macro name PUBLIC name name: endm BREAK <ERROR - print a message and then jump to a label> error macro code local a .xcref MOV AL,code transfer SYS_RET_ERR .cref ENDM BREAK <JUMP - real jump that links up shortwise> ; ; given a label <lbl> either 2 byte jump to another label <lbl>_J ; if it is near enough or 3 byte jump to <lbl> ; jump macro lbl local a .xcref a: ifndef lbl&_J ; is this the first invocation JMP lbl ELSE IF lbl&_J GE $ JMP lbl ELSE IF ($-lbl&_J) GT 126 ; is the jump too far away? JMP lbl ELSE ; do the short one... JMP lbl&_J ENDIF ENDIF ENDIF endm BREAK <RETURN - return from a function> return macro local a .xcref a: RET ret_l = a endm BREAK <CONDRET - conditional return> makelab macro l,cc,ncc j&ncc a ; j<NCC> a: return ; return a: ; a: ret_&cc = ret_l ; define ret_<CC> to be ret_l endm condret macro cc,ncc local a,b ifdef ret_l ; if ret_l is defined if (($ - ret_l) le 126) and ($ gt ret_l) ; if ret_l is near enough then a: j&cc ret_l ; a: j<CC> to ret_l ret_&cc = a ; define ret_<CC> to be a: else makelab a,cc,ncc endif else ifdef ret_&cc ; if ret_<CC> defined if (($ - ret_&cc) le 126) and ($ gt ret_&cc) ; if ret_<CC> is near enough a: j&cc ret_&cc ; a: j<CC> to ret_<CC> ret_&cc = a ; define ret_<CC> to be a: else makelab a,cc,ncc endif else makelab a,cc,ncc endif endif endm ;condret macro cc,ncc ; local a,b ; ifdef ret_l ; if ret_l is defined ; if (($ - ret_l) le 126) and ($ gt ret_l) ; ; if ret_l is near enough then ; a: j&cc ret_l ; a: j<CC> to ret_l ; ret_&cc = a ; define ret_<CC> to be a: ; exitm ; endif ; endif ; ifdef ret_&cc ; if ret_<CC> defined ; if (($ - ret_&cc) le 126) and ($ gt ret_&cc) ; ; if ret_<CC> is near enough ; a: j&cc ret_&cc ; a: j<CC> to ret_<CC> ; ret_&cc = a ; define ret_<CC> to be a: ; exitm ; endif ; endif ; j&ncc a ; j<NCC> a: ; return ; return ; a: ; a: ; ret_&cc = ret_l ; define ret_<CC> to be ret_l ;endm BREAK <RETZ - return if zero, links up shortwise if necessary> retz macro condret z,nz endm BREAK <RETNZ - return if not zero, links up shortwise if necessary> retnz macro condret nz,z endm BREAK <RETC - return if carry set, links up shortwise if necessary> retc macro condret c,nc endm BREAK <RETNC - return if not carry, links up shortwise if necessary> retnc macro condret nc,c endm ; END OF DOSMAC.ASM IF2 %OUT DOSSYM in Pass 2 ENDIF IFNDEF ALTVECT ALTVECT EQU 0 ;FALSE ENDIF BREAK <Control character definitions> c_DEL EQU 7Fh ; ASCII rubout or delete previous char c_BS EQU 08h ; ^H ASCII backspace c_CR EQU 0Dh ; ^M ASCII carriage return c_LF EQU 0Ah ; ^J ASCII linefeed c_ETB EQU 17h ; ^W ASCII end of transmission c_NAK EQU 15h ; ^U ASCII negative acknowledge c_ETX EQU 03h ; ^C ASCII end of text c_HT EQU 09h ; ^I ASCII tab BREAK <BPB Definition> ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; ; ; C A V E A T P R O G R A M M E R ; ; ; ; Certain structures, constants and system calls below are private to ; ; the DOS and are extremely version-dependent. They may change at any ; ; time at the implementors' whim. As a result, they must not be ; ; documented to the general public. If an extreme case arises, they ; ; must be documented with this warning. ; ; ; ; Those structures and constants that are subject to the above will be ; ; marked and bracketed with the flag: ; ; ; ; C A V E A T P R O G R A M M E R ; ; ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; BREAK <Bios Parameter Block> ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; ; Bios Parameter Block definition ; This structure is used to build a full DPB BPBLOCK STRUC BPSECSZ DW ? ; Size in bytes of physical sector BPCLUS DB ? ; Sectors/Alloc unit BPRES DW ? ; Number of reserved sectors BPFTCNT DB ? ; Number of FATs BPDRCNT DW ? ; Number of directory entries BPSCCNT DW ? ; Total number of sectors BPMEDIA DB ? ; Media descriptor byte BPFTSEC DW ? ; Number of sectors taken up by one FAT BPBLOCK ENDS ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; BREAK <Disk I/O Buffer Header> ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; ; Field definition for I/O buffer information BUFFINFO STRUC NEXTBUF DD ? ; Pointer to next buffer in list ; The next two items are often refed as a word BUFDRV DB ? ; Logical drive # assoc with buffer FF = free BUFDIRTY DB ? ; Dirty flag BUFPRI DB ? ; Buffer selection priority (see EQUs below) VISIT DB ? ; Visit flag for buffer pool scans BUFSECNO DW ? ; Sector number of buffer ; The next two items are often refed as a word BUFWRTCNT DB ? ; For FAT sectors, # times sector written out BUFWRTINC DB ? ; " " " , # sectors between each write BUFDRVDP DD ? ; Pointer to drive parameters BUFFINFO ENDS BUFINSIZ EQU SIZE BUFFINFO ; Size of structure in bytes FREEPRI EQU 0 LBRPRI EQU 2 ; Last byte of buffer read LBWPRI EQU 4 ; Last byte written RPRI EQU 6 ; Read but not last byte WPRI EQU 8 ; Written but not last byte DIRPRI EQU 15 ; Directory Sector FATPRI EQU 30 ; FAT sector ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; BREAK <User stack inside of system call> ; Location of user registers relative user stack pointer user_environ STRUC user_AX DW ? user_BX DW ? user_CX DW ? user_DX DW ? user_SI DW ? user_DI DW ? user_BP DW ? user_DS DW ? user_ES DW ? user_IP DW ? user_CS DW ? user_F DW ? user_environ ENDS BREAK <interrupt definitions> INTTAB EQU 20H INTBASE EQU 4 * inttab ENTRYPOINT EQU INTBASE+40H IF ALTVECT ALTTAB EQU 0F0H ALTBASE EQU 4 * ALTTAB ENDIF ; ; interrupt assignments ; IF NOT ALTVECT int_abort EQU INTTAB ; abort process int_command EQU int_abort+1 ; call MSDOS int_terminate EQU int_abort+2 ; int to terminate address int_ctrl_c EQU int_abort+3 ; ^c trapper int_fatal_abort EQU int_abort+4 ; hard disk error int_disk_read EQU int_abort+5 ; logical sector disk read int_disk_write EQU int_abort+6 ; logical sector disk write int_keep_process EQU int_abort+7 ; terminate program and stay resident ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; int_spooler EQU int_abort+8 ; spooler call int_fastcon EQU int_abort+9 ; fast CON interrupt ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ELSE int_abort EQU INTTAB ; abort process int_command EQU int_abort+1 ; call MSDOS int_terminate EQU ALTTAB ; int to terminate address int_ctrl_c EQU int_terminate+1 ; ^c trapper int_fatal_abort EQU int_terminate+2 ; hard disk error int_disk_read EQU int_abort+5 ; logical sector disk read int_disk_write EQU int_abort+6 ; logical sector disk write int_keep_process EQU int_abort+7 ; terminate program and stay resident ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; int_spooler EQU int_terminate+3 ; spooler call int_fastcon EQU int_abort+9 ; fast CON interrupt ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ENDIF addr_int_abort EQU 4 * int_abort addr_int_command EQU 4 * int_command addr_int_terminate EQU 4 * int_terminate addr_int_ctrl_c EQU 4 * int_ctrl_c addr_int_fatal_abort EQU 4 * int_fatal_abort addr_int_disk_read EQU 4 * int_disk_read addr_int_disk_write EQU 4 * int_disk_write addr_int_keep_process EQU 4 * int_keep_process ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; addr_int_spooler EQU 4 * int_spooler addr_int_fastcon EQU 4 * int_fastcon ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; BREAK <Disk map> ; MSDOS partitions the disk into 4 sections: ; ; phys sector 0: +-------------------+ ; | | boot/reserved | ; | +-------------------+ ; | | File allocation | ; v | table(s) | ; | (multiple copies | ; | are kept) | ; +-------------------+ ; | Directory | ; +-------------------+ ; | File space | ; +-------------------+ ; | Unaddressable | ; | (to end of disk) | ; +-------------------+ ; ; All partition boundaries are sector boundaries. The size of the FAT is ; adjusted to maximize the file space addressable. BREAK <Directory entry> ; ; +---------------------------+ ; | (12 BYTE) filename/ext | 0 0 ; +---------------------------+ ; | (BYTE) attributes | 11 B ; +---------------------------+ ; | (10 BYTE) reserved | 12 C ; +---------------------------+ ; | (WORD) time of last write | 22 16 ; +---------------------------+ ; | (WORD) date of last write | 24 18 ; +---------------------------+ ; | (WORD) First cluster | 26 1A ; +---------------------------+ ; | (DWORD) file size | 28 1C ; +---------------------------+ ; ; First byte of filename = E5 -> free directory entry ; = 00 -> end of allocated directory ; Time: Bits 0-4=seconds/2, bits 5-10=minute, 11-15=hour ; Date: Bits 0-4=day, bits 5-8=month, bits 9-15=year-1980 ; dir_entry STRUC dir_name DB 11 DUP (?) ; file name dir_attr DB ? ; attribute bits dir_pad DB 10 DUP (?) ; reserved for expansion dir_time DW ? ; time of last write dir_date DW ? ; date of last write dir_first DW ? ; first allocation unit of file dir_size_l DW ? ; low 16 bits of file size dir_size_h DW ? ; high 16 bits of file size dir_entry ENDS attr_read_only EQU 1h attr_hidden EQU 2h attr_system EQU 4h attr_volume_id EQU 8h attr_directory EQU 10h attr_archive EQU 20h attr_all EQU attr_hidden+attr_system+attr_directory ; OR of hard attributes for FINDENTRY attr_ignore EQU attr_read_only+attr_archive ; ignore this(ese) attribute(s) ; during search first/next attr_changeable EQU attr_read_only+attr_hidden+attr_system+attr_archive ; changeable via CHMOD BREAK <File allocation Table information> ; ; The File Allocation Table uses a 12-bit entry for each allocation unit on the ; disk. These entries are packed, two for every three bytes. The contents of ; entry number N is found by 1) multiplying N by 1.5; 2) adding the result to ; the base address of the Allocation Table; 3) fetching the 16-bit word at this ; address; 4) If N was odd (so that N*1.5 was not an integer), shift the word ; right four bits; 5) mask to 12 bits (AND with 0FFF hex). Entry number zero ; is used as an end-of-file trap in the OS and is passed to the BIOS to help ; determine disk format. Entry 1 is reserved for future use. The first ; available allocation unit is assigned entry number two, and even though it is ; the first, is called cluster 2. Entries greater than 0FF8H are end of file ; marks; entries of zero are unallocated. Otherwise, the contents of a FAT ; entry is the number of the next cluster in the file. ; ; Clusters with bad sectors are tagged with FF7H. Any non-zero number would do ; because these clusters show as allocated, but are not part of any allocation ; chain and thus will never be allocated to a file. A particular number is ; selected so that disk checking programs know what to do (ie. a cluster with ; entry FF7H which is not in a chain is not an error). BREAK <DPB structure> ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; DIRSTRLEN EQU 64 ; Max length in bytes of directory strings dpb STRUC dpb_drive DB ? ; Logical drive # assoc with DPB (A=0,B=1,...) dpb_UNIT DB ? ; Driver unit number of DPB dpb_sector_size DW ? ; Size of physical sector in bytes dpb_cluster_mask DB ? ; Sectors/cluster - 1 dpb_cluster_shift DB ? ; Log2 of sectors/cluster dpb_first_FAT DW ? ; Starting record of FATs dpb_FAT_count DB ? ; Number of FATs for this drive dpb_root_entries DW ? ; Number of directory entries dpb_first_sector DW ? ; First sector of first cluster dpb_max_cluster DW ? ; Number of clusters on drive + 1 dpb_FAT_size DB ? ; Number of records occupied by FAT dpb_dir_sector DW ? ; Starting record of directory dpb_driver_addr DD ? ; Pointer to driver dpb_media DB ? ; Media byte dpb_first_access DB ? ; This is initialized to -1 to force a media ; check the first time this DPB is used dpb_next_dpb DD ? ; Pointer to next Drive parameter block dpb_current_dir DW ? ; Cluster number of start of current directory ; 0 indicates root, -1 indicates invalid ; (disk ? changed) dpb_dir_text DB DIRSTRLEN DUP(?) ; ASCIZ string of current directory dpb ENDS DPBSIZ EQU SIZE dpb ; Size of the structure in bytes DSKSIZ = dpb_max_cluster ; Size of disk (temp used during init only) ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; BREAK <File Control Block definition> ; ; Field definition for FCBs ; The FCB has the following structure: ; ; +---------------------------+ ; | Drive indicator(byte) | ; +---------------------------+ ; | Filename (8 chars) | ; +---------------------------+ ; | Extension (3 chars) | ; +---------------------------+ ; | Current Extent(word) | ; +---------------------------+ ; | Record size (word) | ; +---------------------------+ ; | File Size (2 words) | ; +---------------------------+ ; | Date of write | ; +---------------------------+ ; | Time of write | ; +---------------------------+ ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; ; | Flags: | ; | bit 7=0 file/1 device | ; | bit 6=0 if dirty | ; | bits 0-5 deviceid | ; +---------------------------+ ; | first cluster in file | ; +---------------------------+ ; | position of last cluster | ; +---------------------------+ ; | last cluster accessed | 12 bit-+--- packed in 3 bytes ; +---------------------------+ | ; | parent directory | <------+ ; +---------------------------+ ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; | next record number | ; +---------------------------+ ; | random record number | ; +---------------------------+ ; sys_fcb STRUC fcb_drive DB ? fcb_name DB 8 DUP (?) fcb_ext DB 3 DUP (?) fcb_EXTENT DW ? fcb_RECSIZ DW ? ; Size of record (user settable) fcb_FILSIZ DW ? ; Size of file in bytes; used with the following ; word fcb_DRVBP DW ? ; BP for SEARCH FIRST and SEARCH NEXT fcb_FDATE DW ? ; Date of last writing fcb_FTIME DW ? ; Time of last writing ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; fcb_DEVID DB ? ; Device ID number, bits 0-5 if file. ; bit 7=0 for file, bit 7=1 for I/O device ; If file, bit 6=0 if dirty ; If I/O device, bit 6=0 if EOF (input) ; Bit 5=1 if Raw mode ; Bit 0=1 if console input device ; Bit 1=1 if console output device ; Bit 2=1 if null device ; Bit 3=1 if clock device fcb_FIRCLUS DW ? ; First cluster of file fcb_CLUSPOS DW ? ; Position of last cluster accessed fcb_LSTCLUS DW ? ; Last cluster accessed and directory DB ? ; pack 2 12 bit numbers into 24 bits... ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; fcb_NR DB ? ; Next record fcb_RR DB 4 DUP (?) ; Random record sys_fcb ENDS FILDIRENT = fcb_FILSIZ ; Used only by SEARCH FIRST and ; SEARCH NEXT ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; devid_file_clean EQU 40h ; true if file and not written devid_file_mask_drive EQU 3Fh ; mask for drive number devid_device EQU 80h ; true if a device devid_device_EOF EQU 40h ; true if end of file reached devid_device_raw EQU 20h ; true if in raw mode devid_device_special EQU 10h ; true if special device devid_device_clock EQU 08h ; true if clock device devid_device_null EQU 04h ; true if null device devid_device_con_out EQU 02h ; true if console output devid_device_con_in EQU 01h ; true if consle input ; ; structure of devid field as returned by IOCTL is: ; ; BIT 7 6 5 4 3 2 1 0 ; |---|---|---|---|---|---|---|---| ; | I | E | R | S | I | I | I | I | ; | S | O | A | P | S | S | S | S | ; | D | F | W | E | C | N | C | C | ; | E | | | C | L | U | O | I | ; | V | | | L | K | L | T | N | ; |---|---|---|---|---|---|---|---| ; ISDEV = 1 if this channel is a device ; = 0 if this channel is a disk file ; ; If ISDEV = 1 ; ; EOF = 0 if End Of File on input ; RAW = 1 if this device is in Raw mode ; = 0 if this device is cooked ; ISCLK = 1 if this device is the clock device ; ISNUL = 1 if this device is the null device ; ISCOT = 1 if this device is the console output ; ISCIN = 1 if this device is the console input ; ; If ISDEV = 0 ; EOF = 0 if channel has been written ; Bits 0-5 are the block device number for ; the channel (0 = A, 1 = B, ...) ; devid_ISDEV EQU 80h devid_EOF EQU 40h devid_RAW EQU 20h devid_SPECIAL EQU 10H devid_ISCLK EQU 08h devid_ISNUL EQU 04h devid_ISCOT EQU 02h devid_ISCIN EQU 01h devid_block_dev EQU 1Fh ; mask for block device number ; ; find first/next buffer ; find_buf STRUC find_buf_sattr DB ? ; attribute of search find_buf_drive DB ? ; drive of search find_buf_name DB 11 DUP (?) ; formatted name find_buf_LastEnt DW ? ; LastEnt find_buf_ThisDPB DD ? ; This DPB find_buf_DirStart DW ? ; DirStart ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; find_buf_attr DB ? ; attribute found find_buf_time DW ? ; time find_buf_date DW ? ; date find_buf_size_l DW ? ; low(size) find_buf_size_h DW ? ; high(size) find_buf_pname DB 13 DUP (?) ; packed name find_buf ENDS BREAK <Process data block> ; ; Process data block (otherwise known as program header) ; FilPerProc EQU 20 Process_data_block STRUC PDB_Exit_Call DW ? ; INT int_abort system terminate PDB_block_len DW ? ; size of execution block DB ? PDB_CPM_Call DB 5 DUP (?) ; ancient call to system PDB_Exit DD ? ; pointer to exit routine PDB_Ctrl_C DD ? ; pointer to ^C routine PDB_Fatal_abort DD ? ; pointer to fatal error ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; PDB_Parent_PID DW ? ; PID of parent (terminate PID) PDB_JFN_Table DB FilPerProc DUP (?) ; indices into system table ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; PDB_environ DW ? ; seg addr of environment ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; PDB_User_stack DD ? ; stack of self during system calls PDB_PAD1 DB 1Eh DUP (?) ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; PDB_Call_system DB 5 DUP (?) ; portable method of system call ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; PDB_PAD2 DB 6h DUP (?) ; ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; Process_data_block ENDS BREAK <EXEC and EXE file structures> ; ; EXEC arg block - load/go program ; ; ; The following get used as arguments to the EXEC system call. They indicate ; whether or not the program is executed or whether or not a program header ; gets created. ; exec_func_no_execute EQU 1 ; no execute bit exec_func_overlay EQU 2 ; overlay bit Exec0 STRUC Exec0_environ DW ? ; seg addr of environment Exec0_com_line DD ? ; pointer to asciz command line Exec0_5C_FCB DD ? ; default fcb at 5C Exec0_6C_FCB DD ? ; default fcb at 6C Exec0 ENDS Exec1 STRUC Exec1_environ DW ? ; seg addr of environment Exec1_com_line DD ? ; pointer to asciz command line Exec1_5C_FCB DD ? ; default fcb at 5C Exec1_6C_FCB DD ? ; default fcb at 6C Exec1_SP DW ? ; stack pointer of program Exec1_SS DW ? ; stack seg register of program Exec1_IP DW ? ; entry point IP Exec1_CS DW ? ; entry point CS Exec1 ENDS Exec3 STRUC Exec3_load_addr DW ? ; seg address of load point Exec3_reloc_fac DW ? ; relocation factor Exec3 ENDS ; ; Exit codes in upper byte ; Exit_terminate EQU 0 Exit_abort EQU 0 Exit_Ctrl_C EQU 1 Exit_Hard_Error EQU 2 Exit_Keep_process EQU 3 ; ; EXE file header ; EXE_file STRUC exe_signature DW ? ; must contain 4D5A (yay zibo!) exe_len_mod_512 DW ? ; low 9 bits of length exe_pages DW ? ; number of 512b pages in file exe_rle_count DW ? ; count of reloc entries exe_par_dir DW ? ; number of paragraphs before image exe_min_BSS DW ? ; minimum number of para of BSS exe_max_BSS DW ? ; max number of para of BSS exe_SS DW ? ; stack of image exe_SP DW ? ; SP of image exe_chksum DW ? ; checksum of file (ignored) exe_IP DW ? ; IP of entry exe_CS DW ? ; CS of entry exe_rle_table DW ? ; byte offset of reloc table exe_iov DW ? ; overlay number (0 for root) exe_sym_tab DD ? ; offset of symbol table in file EXE_file ENDS exe_valid_signature EQU 5A4Dh exe_valid_old_signature EQU 4D5Ah symbol_entry STRUC sym_value DD ? sym_type DW ? sym_len DB ? sym_name DB 255 dup (?) symbol_entry ENDS BREAK <Internal system file table format> ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; ; ; system file table ; sft STRUC sft_link DD ? sft_count DW ? ; number of entries sft_table DW ? ; beginning of array of the following sft ENDS ; ; system file table entry ; sf_entry STRUC sf_ref_count DB ? ; number of processes sharing fcb sf_mode DB ? ; mode of access sf_attr DB ? ; attribute of file sf_fcb DB (SIZE sys_fcb) DUP (?) ; actual FCB sf_entry ENDS sf_default_number EQU 5h ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; BREAK <Memory arena structure> ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; ; ; arena item ; arena STRUC arena_signature DB ? ; 4D for valid item, 5A for last item arena_owner DW ? ; owner of arena item arena_size DW ? ; size in paragraphs of item arena ENDS arena_owner_system EQU 0 ; free block indication arena_signature_normal EQU 4Dh ; valid signature, not end of arena arena_signature_end EQU 5Ah ; valid signature, last block in arena ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; BREAK <Machine instruction definitions> mi_INT EQU 0CDh mi_Long_JMP EQU 0EAh mi_Long_CALL EQU 09Ah mi_Long_RET EQU 0CBh BREAK <Standard I/O assignments> stdin EQU 0 stdout EQU 1 stderr EQU 2 stdaux EQU 3 stdprn EQU 4 BREAK <Xenix subfunction assignments> open_for_read EQU 0 open_for_write EQU 1 open_for_both EQU 2 BREAK <Xenix error codes> ; ; XENIX calls all return error codes through AX. If an error occurred then the ; carry bit will be set and the error code is in AX. If no error occurred then ; the carry bit is reset and AX contains returned info. ; no_error_occurred EQU 0 ? error_invalid_function EQU 1 error_file_not_found EQU 2 error_path_not_found EQU 3 error_too_many_open_files EQU 4 error_access_denied EQU 5 error_invalid_handle EQU 6 error_arena_trashed EQU 7 error_not_enough_memory EQU 8 error_invalid_block EQU 9 error_bad_environment EQU 10 error_bad_format EQU 11 error_invalid_access EQU 12 error_invalid_data EQU 13 ;**** unused EQU 14 error_invalid_drive EQU 15 error_current_directory EQU 16 error_not_same_device EQU 17 error_no_more_files EQU 18 alloc_not_enough_memory EQU error_not_enough_memory alloc_arena_trashed EQU error_arena_trashed close_invalid_handle EQU error_invalid_handle close_invalid_function EQU error_invalid_function chdir_path_not_found EQU error_path_not_found chmod_path_not_found EQU error_path_not_found chmod_access_denied EQU error_access_denied chmod_invalid_function EQU error_invalid_function creat_access_denied EQU error_access_denied creat_path_not_found EQU error_path_not_found creat_too_many_open_files EQU error_too_many_open_files curdir_invalid_drive EQU error_invalid_drive dealloc_invalid_block EQU error_invalid_block dealloc_arena_trashed EQU error_arena_trashed dup_invalid_handle EQU error_invalid_handle dup_too_many_open_files EQU error_too_many_open_files dup2_invalid_handle EQU error_invalid_handle exec_invalid_function EQU error_invalid_function exec_bad_environment EQU error_bad_environment exec_bad_format EQU error_bad_format exec_not_enough_memory EQU error_not_enough_memory exec_file_not_found EQU error_file_not_found filetimes_invalid_function EQU error_invalid_function filetimes_invalid_handle EQU error_invalid_handle findfirst_file_not_found EQU error_file_not_found findfirst_no_more_files EQU error_no_more_files findnext_no_more_files EQU error_no_more_files international_invalid_function EQU error_invalid_function ioctl_invalid_handle EQU error_invalid_handle ioctl_invalid_function EQU error_invalid_function ioctl_invalid_data EQU error_invalid_data lseek_invalid_handle EQU error_invalid_handle lseek_invalid_function EQU error_invalid_function mkdir_path_not_found EQU error_path_not_found mkdir_access_denied EQU error_access_denied open_invalid_access EQU error_invalid_access open_file_not_found EQU error_file_not_found open_access_denied EQU error_access_denied open_too_many_open_files EQU error_too_many_open_files read_invalid_handle EQU error_invalid_handle read_access_denied EQU error_access_denied rename_file_not_found EQU error_file_not_found rename_not_same_device EQU error_not_same_device rename_access_denied EQU error_access_denied rmdir_path_not_found EQU error_path_not_found rmdir_access_denied EQU error_access_denied rmdir_current_directory EQU error_current_directory setblock_invalid_block EQU error_invalid_block setblock_arena_trashed EQU error_arena_trashed setblock_not_enough_memory EQU error_not_enough_memory setblock_invalid_function EQU error_invalid_function unlink_file_not_found EQU error_file_not_found unlink_access_denied EQU error_access_denied write_invalid_handle EQU error_invalid_handle write_access_denied EQU error_access_denied BREAK <system call definitions> ABORT EQU 0 ; 0 0 STD_CON_INPUT EQU 1 ; 1 1 STD_CON_OUTPUT EQU 2 ; 2 2 STD_AUX_INPUT EQU 3 ; 3 3 STD_AUX_OUTPUT EQU 4 ; 4 4 STD_PRINTER_OUTPUT EQU 5 ; 5 5 RAW_CON_IO EQU 6 ; 6 6 RAW_CON_INPUT EQU 7 ; 7 7 STD_CON_INPUT_NO_ECHO EQU 8 ; 8 8 STD_CON_STRING_OUTPUT EQU 9 ; 9 9 STD_CON_STRING_INPUT EQU 10 ; 10 A STD_CON_INPUT_STATUS EQU 11 ; 11 B STD_CON_INPUT_FLUSH EQU 12 ; 12 C DISK_RESET EQU 13 ; 13 D SET_DEFAULT_DRIVE EQU 14 ; 14 E FCB_OPEN EQU 15 ; 15 F FCB_CLOSE EQU 16 ; 16 10 DIR_SEARCH_FIRST EQU 17 ; 17 11 DIR_SEARCH_NEXT EQU 18 ; 18 12 FCB_DELETE EQU 19 ; 19 13 FCB_SEQ_READ EQU 20 ; 20 14 FCB_SEQ_WRITE EQU 21 ; 21 15 FCB_CREATE EQU 22 ; 22 16 FCB_RENAME EQU 23 ; 23 17 GET_DEFAULT_DRIVE EQU 25 ; 25 19 SET_DMA EQU 26 ; 26 1A ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; GET_DEFAULT_DPB EQU 31 ; 31 1F ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; FCB_RANDOM_READ EQU 33 ; 33 21 FCB_RANDOM_WRITE EQU 34 ; 34 22 GET_FCB_FILE_LENGTH EQU 35 ; 35 23 GET_FCB_POSITION EQU 36 ; 36 24 SET_INTERRUPT_VECTOR EQU 37 ; 37 25 CREATE_PROCESS_DATA_BLOCK EQU 38 ; 38 26 FCB_RANDOM_READ_BLOCK EQU 39 ; 39 27 FCB_RANDOM_WRITE_BLOCK EQU 40 ; 40 28 PARSE_FILE_DESCRIPTOR EQU 41 ; 41 29 GET_DATE EQU 42 ; 42 2A SET_DATE EQU 43 ; 43 2B GET_TIME EQU 44 ; 44 2C SET_TIME EQU 45 ; 45 2D SET_VERIFY_ON_WRITE EQU 46 ; 46 2E ; Extended functionality group GET_DMA EQU 47 ; 47 2F GET_VERSION EQU 48 ; 48 30 KEEP_PROCESS EQU 49 ; 49 31 ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; GET_DPB EQU 50 ; 50 32 ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; SET_CTRL_C_TRAPPING EQU 51 ; 51 33 GET_INDOS_FLAG EQU 52 ; 52 34 GET_INTERRUPT_VECTOR EQU 53 ; 53 35 GET_DRIVE_FREESPACE EQU 54 ; 54 36 CHAR_OPER EQU 55 ; 55 37 INTERNATIONAL EQU 56 ; 56 38 ; XENIX CALLS ; Directory Group MKDIR EQU 57 ; 57 39 RMDIR EQU 58 ; 58 3A CHDIR EQU 59 ; 59 3B ; File Group CREAT EQU 60 ; 60 3C OPEN EQU 61 ; 61 3D CLOSE EQU 62 ; 62 3E READ EQU 63 ; 63 3F WRITE EQU 64 ; 64 40 UNLINK EQU 65 ; 65 41 LSEEK EQU 66 ; 66 42 CHMOD EQU 67 ; 67 43 IOCTL EQU 68 ; 68 44 XDUP EQU 69 ; 69 45 XDUP2 EQU 70 ; 70 46 CURRENT_DIR EQU 71 ; 71 47 ; Memory Group ALLOC EQU 72 ; 72 48 DEALLOC EQU 73 ; 73 49 SETBLOCK EQU 74 ; 74 4A ; Process Group EXEC EQU 75 ; 75 4B EXIT EQU 76 ; 76 4C WAIT EQU 77 ; 77 4D FIND_FIRST EQU 78 ; 78 4E ; Special Group FIND_NEXT EQU 79 ; 79 4F ; SPECIAL SYSTEM GROUP ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; SET_CURRENT_PDB EQU 80 ; 80 50 GET_CURRENT_PDB EQU 81 ; 81 51 GET_IN_VARS EQU 82 ; 82 52 SETDPB EQU 83 ; 83 53 ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; GET_VERIFY_ON_WRITE EQU 84 ; 84 54 ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; ; C A V E A T P R O G R A M M E R ; ; ; DUP_PDB EQU 85 ; 85 55 ; ; ; C A V E A T P R O G R A M M E R ; ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----; RENAME EQU 86 ; 86 56 FILE_TIMES EQU 87 ; 87 57 SET_OEM_HANDLER EQU 248 ; 248 F8 OEM_C1 EQU 249 ; 249 F9 OEM_C2 EQU 250 ; 250 FA OEM_C3 EQU 251 ; 251 FB OEM_C4 EQU 252 ; 252 FC OEM_C5 EQU 253 ; 253 FD OEM_C6 EQU 254 ; 254 FE OEM_C7 EQU 255 ; 255 FF SUBTTL ; END OF DOSSYM.ASM CODE SEGMENT PUBLIC ORG 100H ASSUME CS:CODE,DS:CODE,ES:CODE,SS:CODE START: MOV AH,GET_VERSION INT 21H XCHG AH,AL ; Turn it around to AH.AL CMP AX,200H JAE OKDOS MOV DX,OFFSET BADVER MOV AH,STD_CON_STRING_OUTPUT INT 21H INT 20H OKDOS: IF IBMVER IF KANJI MOV BYTE PTR MAXROW,24 ELSE MOV BYTE PTR MAXROW,25 ENDIF MOV AH,15 INT 16 MOV MAXCOL,AH ENDIF MOV DX,OFFSET CRLFTXT ; INITIALIZE CURSOR MOV AH,STD_CON_STRING_OUTPUT INT 21H XOR BX,BX ; DUP FILE HANDLE 0 MOV AH,XDUP INT 21H MOV BP,AX MOV AH,CLOSE ; CLOSE STANDARD IN INT 21H MOV BX,2 ; DUP STD ERR TO STANDARD IN MOV AH,XDUP INT 21H ALOOP: CLD MOV DX,OFFSET BUFFER MOV CX,4096 MOV BX,BP MOV AH,READ INT 21H OR AX,AX JNZ SETCX DONE: INT 20H SETCX: MOV CX,AX MOV SI,DX TLOOP: LODSB CMP AL,1AH JZ DONE CMP AL,13 JNZ NOTCR MOV BYTE PTR CURCOL,1 JMP SHORT ISCNTRL NOTCR: CMP AL,10 JNZ NOTLF INC BYTE PTR CURROW JMP SHORT ISCNTRL NOTLF: CMP AL,8 JNZ NOTBP CMP BYTE PTR CURCOL,1 JZ ISCNTRL DEC BYTE PTR CURCOL JMP SHORT ISCNTRL NOTBP: CMP AL,9 JNZ NOTTB MOV AH,CURCOL ADD AH,7 AND AH,11111000B INC AH MOV CURCOL,AH JMP SHORT ISCNTRL NOTTB: IF MSVER ; IBM CONTROL CHARACTER PRINT CMP AL,' ' JB ISCNTRL ENDIF IF IBMVER CMP AL,7 ; ALL CHARACTERS PRINT BUT BELL JZ ISCNTRL ENDIF INC BYTE PTR CURCOL MOV AH,CURCOL CMP AH,MAXCOL JBE ISCNTRL INC BYTE PTR CURROW MOV BYTE PTR CURCOL,1 ISCNTRL: MOV DL,AL MOV AH,STD_CON_OUTPUT INT 21H MOV AH,CURROW CMP AH,MAXROW JB CHARLOOP ASKMORE: MOV DX,OFFSET MORETXT MOV AH,STD_CON_STRING_OUTPUT INT 21H ; ASK MORE? MOV AH,STD_CON_INPUT_FLUSH ; WAIT FOR A KEY, NO ECHO MOV AL,STD_CON_INPUT INT 21H MOV DX,OFFSET CRLFTXT MOV AH,STD_CON_STRING_OUTPUT INT 21H MOV BYTE PTR CURCOL,1 MOV BYTE PTR CURROW,1 CHARLOOP: DEC CX JZ GOBIG JMP TLOOP GOBIG: JMP ALOOP MAXROW DB 24 MAXCOL DB 80 CURROW DB 1 CURCOL DB 1 EXTRN MORETXT:BYTE,BADVER:BYTE,CRLFTXT:BYTE,BUFFER:BYTE CODE ENDS END START |
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24 Dec 2014, 03:51 |
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smiddy
I was playing around with the executable this evening. But in reading it I'm totally lost. I'll keep reading it, perhaps something will stick.
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24 Dec 2014, 05:04 |
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baldr
smiddy,
You can start with simple identity filter (copy stdin to stdout), then modify it to pause on full page (you may assume 25-row display). Here is an example you may find useful: Code: org 100h ; t.com - copy stdin to stdout and stderr t: mov ah, 3Fh mov cx, buffer.size mov dx, buffer xor bx, bx int 21h jc .done mov cx, ax jcxz .done mov ah, 40h inc bx int 21h jc .done mov cx, ax jcxz .done mov ah, 40h inc bx int 21h jc .done test ax, ax jnz t .done: ret buffer rb 4096 .size = $-buffer |
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24 Dec 2014, 14:11 |
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smiddy
Thanks man! I am deep into Christmas Eve with my kids, so it will be sometime before I get the opportunity to play with it.
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24 Dec 2014, 19:20 |
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