TweetFollow Us on Twitter

Volume Number:2
Issue Number:5
Column Tag:Graphics Lab:Asm

BitNapper DA Steals Bit Maps!

By Chris Yerga, MacTutor Contributing Editor

Anguish and Fear

Welcome to the first installment of the Graphics Lab. This is where we really see what the graphics capability of the Macintosh is like. This month's column will discuss desk accessories and the techniques necessary to implement them using MDS, and in particular, the marvelous BitNapper DA, which will become very important to us next month. I have always had problems understanding what desk accessories really are and why mine never worked. Consequently, when I realized that I needed to write a DA to simplify the development of a game, I was wracked with apprehension. So my special thanks go to BMUG's Dave Burnard, who taught me how to write desk accessories without even realizing it. Thanks Dave.

Cutting Up

First, lets discuss what the desk accessory will do. The BitNapper DA's, function is to allow the user to "cut" rectangular reigons from the screen image. The DA will then create a bitMap out of the data, format it as an MDS source file, and write it out to disk. This allows us to cut graphics from MacPaint or any other application that supports desk accessories, and use them in our own MDS programs. More details on this technique will be presented next month when we use our BitNapper DA with another graphics program to create animated effects.

Since we want access to graphics anywhere on the screen, it is undesirable to have our desk accessory based in a window which will cover up some area of the screen. As a result, we will make our DA menu based. When the desk accessory is opened, it will install it's own menu in the menu bar, and it will remove the menu when it's closed.

The essence of desk accessories

Now lets take a look at the desk accessory itself. From a low-level veiwpoint, a desk accessory is a device driver. That is, desk accessories and device drivers are structured similarly. The structure that they share is somewhat different from that of a standard Macintosh application, and consequently, the programming approach is a bit different. To understand why this is, lets look at figure #1.

Figure #1 shows the structure of a DA header. The first word, drvrFlags, specifies what types of calls are supported by the desk accessory, whether it needs to be called periodically, etc. Our DA will set this to indicate that Control calls are supported, and that the accessory should be locked in memory after it's loaded. The following word is drvrDelay, which determines how often, in ticks, the desk accessory needs to be called. Since we don't need to update an on-screen clock or perform any similar task, we don't require periodic calls and will set this field to NUL.

The next word, drvvrEMask, is the event mask for our DA. We will set ours to NUL, because our DA doesn't respond to event manager events. Rather, our DA will respond to desk manager events that are sent when a menu item is selected. The ID of the menu belonging to our DA is stored in the next field, drvrMenu.

The following 5 words are offsets to the Open, Prime, Control, Status, and Close calls relative to the beginning of the desk accessory. The Open routine is called when the DA is first opened, and is responsible for defining and installing the menu, and other initialization tasks. The Prime routine is called when the accessory needs a periodic event, our Prime routine simply returns. The Control routine is the heart of the DA, and is responsible for handling events. Our DA has no Status routine, since it is not appropriate. Finally, the Close routine removes the DA's menu and frees up any storage allocated by the DA.

Following the offsets is an optional name for the desk accessory. This is not where the name that appears in the menu bar is stored; rather, this is available for internal use by the DA. For example, a DA could look here to find the title for it's window, etc. We don't use this name. The remaining data is the actual code for the DA's routines.

But wait, there's more...

There is another data structure that we must concern ourselves with. This is the Device Control Entry. The DCE is a 40 byte relocatable block that is allocated on the system heap when a desk accessory is opened. As illustrated in figure #2, the DCE contains various information about the DA, and copies of some of the data in the DA header. Although it is primarily intended for internal use by the device manager and the desk manager, there are a couple of fields relevant to our discussion.

The DCE contains a field which the DA may use to store a handle to some private storage which it allocates. This field, dCtlStorage, will be where we store the menuHandle for the DA's menu.

Another important field is dCtlWindow, in which the DA may store the windowPtr of it's main window. Its purpose is analogous to our use of dCtlStorage for DA's which are window based. For such DA's it is important to set the windowKind field of the window record to the DA's driver reference number, which is located in dCtlRefNum. This marks the window as belonging to a DA, and insures that Desk Manager and Event Manager routines work properly.

The tables are turned...

We have dealt with register-based calling conventions in the past. This is where arguments are passed in a data structure pointed to by an address register rather than on the stack. But this time we are on the receiving end. Instead of us having to set up the proper fields of a parameter block, we are passed parameter blocks to use or ignore as we wish. When a DA routine is called, A0 contains a pointer to the IOParamBlock and A1 contains a pointer to the DA's DCE. When a DA routine is finished, it must send an error code back in D0. If D0 is cleared, then no error has occurred.

For openers

The first thing the Open routine does is save the registers on the stack. Next, it copies the DCE pointer from A1 into a less volatile register. Then it makes sure this is the first call to the Open routine by testing the dCtlStorage field of the DCE. If there isn't a menuHandle stored here (it's NIL) then a menu is created and the menuHandle is stored, otherwise it just returns.

The Close routine does the opposite. It removes the menu from the menu bar, releases the memory occupied by it, and clears the dCtlStorage field.

The Prime and Status routines don't exist, so the offsets in the DA header point to a routine called Null which simply clears D0 to signify that no error has occurred and returns.

On with the show

The Control routine is the functional element of the DA. When it is called, it checks the csCode field of the IOParamBlock to see if an event of interest has occurred. There are 9 possible messages passed in csCode; they are listed on page 14 of the Desk Manager Programmer's Guide in Inside Macintosh. However, our DA only acknowledges 1 of these messages.

This is accMenu, which has a decimal value of 67. When an accMenu message is passed to a DA, the csParam field of the IOParamBlock contains the MenuID of the menu and csParam+2 contains the item number. SInce we only have one menu, we don't need to check the MenuID. Rather, we check the item number to determine which command was selected.

One of the menu items is Word Constraint, which is toggled on and off by repeated selctions. What this does is force the rectangular regions to have widths which occur on word boundaries; this is a convenient format for certain graphic applications. When this item is selected, the DA calls _GetItmMark to determine if the item is checked. It toggles the appearance of the item with _CheckItem and returns.

The main menu item is Steal Bits. When this is called, the cursor is hidden and is replaced by a small rectangle which inverts whatever it is currently over. The user positions this at the upper left corner of the region he wants to steal. Then the user drags to the lower right of the region. The routine inverts the rectangular region selected until the mouse button is released.

When the button is released, the DA calculates the relevant information needed to create a BitMap data structure containing the selected bits. When this is done, a nonrelocatable block of proper size is allocated on the application heap and the screen data is copied via _CopyBits. The user is then prompted for a filename via SFPutFile and so on. I won't go into detail about this portion of the DA, as it is very similar to my icon converter in Vol. 2 No. 1. of MacTutor. That issue also contains additional information about the structure of BitMaps, if the above seems unclear.

Get it where it counts

Before we can use the DA, we must install it into the System file. A DA is a resource of type DRVR. At the beginning of the source file we use the Resource directive of MDS to assemble the code into a DRVR resource. After linking, the DA can be installed into System via the font/DA mover by holding down the option key and clicking on the open button. This allows us to open the output file which contains our DA resource. Other more tedious options include using the resource editor, resource mover, etc. During development of a DA, I usually just link the .REL file of the DA into the resource fork of a shell application that does nothing else but support DA's. This saves me from the tedious work of installing the DA after every assembly.

I hope that I have shed some light onto desk accessories. If you are interested in this particular DA or graphic techniques in general, more specific information will be coming next month in our special animation issue. Enjoy!

;      BitNapper
;    by Chris Yerga

RESOURCE 'DRVR' 27 'BitNapper'

.TRAP _MakeFile  $A008

MACRO CenterString,MidPt,Y =
 LEA  '{String}',A3;get stringPtr
 MOVE.L #{MidPt},D4
 MOVE #{Y},D5
 BSR  CenterText
MACRO ErrCheck =
 TST.L  D0;error code?
 BNE  IOErr ; a dialog
;  Program constants ----
Chicago EQU 0
Geneva  EQU 3
accMenu EQU 67 ;event code for a Menu event
csCode  EQU 26 ;cntrl code offset in ParamBlock
screenBitsEQU  $FFFFFF86  ;[BitMap]
dCtlStorage EQU  $14  ;driver's private storage [handle]
dCtlRefNumEQU  $18 ;refNum of this driver [word]
dCtlWindowEQU  $1E  ;driver's window (if any) [pointer]
JIODone EQU $8FC  ;IODone entry location [pointer]

 DC.W $4400 ;ctl-enable & lock it
 DC.W 0 ;doesn't need time
 DC.W $0000 ;no events
MenuID: DC.W-12548 ;menu

 DC.W Open-Start ; open routine
 DC.W Null-Start ; prime - unused
 DC.W Control-Start; control
 DC.W Null-Start ; status - unused
 DC.W Close-Start; close
 MOVEM.L A0-A6/D0-D7,-(SP)  ;Save the registers
 MOVE.L A1,A4    ;get a copy of the DCE in A4

 ;Check if we already have a menu.
 ;If one exists, its handle would be stored in dCtlStorage
 ;Otherwise,  dCtlStorage would be NIL
 TST.L  DCtlStorage(A4)   
 BNE  Restore    ;we have one...skip this code

 ;OK. We need to create our menu:

 CLR.L  -(SP)    ;room for menu handle
 LEA  MenuID,A0
 MOVE (A0),-(SP) ;menu ID
 PEA  'BitNapper';menu title
 MOVE.L (SP),dCtlStorage(A4);save handle,  on stack
 PEA  'Steal Bits;Word Constraint;About BitNapper;-;Quit'
 MOVE.L dCtlStorage(A4),-(SP) ;push handle
 CLR  -(SP) ;put at the end of menu bar
 MOVE.L dCtlStorage(A4),-(SP) ;menu handle
 MOVE #4,-(SP)   ;item #3
 _DisableItem    ;disable it
 _DrawMenuBar    ;draw the new menuBar
 MOVEM.L (SP)+,A0-A6/D0-D7; restore regs
 MOVE #0,D0 ;return noErr
 RTS    ;and return...

 MOVEM.L A0-A6/D0-D7,-(SP);save registers
 MOVE.L A1,A4    ;copy DCE to A4
 LEA  MenuID,A0  ;Get the Menu ID
 MOVE (A0),-(SP) ;remove menu from list
 _DeleteMenu;MenuHandle stored in dCtlStorage
 MOVE.L DCtlStorage(A4),-(SP) 
 _DisposMenu;free up its memory
 _DrawMenuBar    ;draw the menubar 
 CLR.L  DCtlStorage(A4) ;remove MenuHandle
 MOVEM.L (SP)+,A0-A6/D0-D7;restore regs
 MOVE #0,D0 ;return noErr
 RTS    ;and return...

 MOVEM.L A0-A6/D0-D7,-(SP);save registers
 MOVE.L A1,A4    ;copy DCE pointer to A4
 MOVE csCode(A0),D0; get the control opCode
 CMP  #accMenu,D0; is it a menu event?
 BEQ  DoCtlEvent ; yes, do it...

 MOVEM.L (SP)+,A0-A6/D0-D7;restore the registers
 MOVE #0,D0 ; return no error
 MOVE.L JIODone,-(SP); jump to IODone

 CMP  #1,30(A0)  ;is it Steal Bits?
 BEQ  GetBits
 CMP  #5,30(A0)  ;is it quit?
 BEQ  ItsQuit
 CMP  #2,30(A0)  ;is it constrain?
 BEQ  Constrain
 CMP  #3,30(A0)  ;is it About?
 BEQ  About
 BRA  CtlDone
 CLR.L  -(SP)    ;room for WindowPtr
 CLR.L  -(SP)    ;allocate storage in heap
 PEA  WindowRect ;bounds
 PEA  'Title?'   ;title..unused
 MOVE #$0101,-(SP) ;visible
 MOVE #1,-(SP)   ;dialog-style window
 MOVE.L #-1,-(SP);put it in front
 CLR  -(SP) ;noGoAway
 CLR.L  -(SP)    ;refcon
 MOVE.L (SP)+,A2 ;save windowPtr
 PEA  thePort    ;VAR thePort
 _GetPort ;save current grafport
 MOVE.L A2,-(SP) ;make help window current port

 MOVE #Chicago,-(SP) ;set font
 MOVE #12,-(SP)  ;12 point
 Center the BitNapper,178,20
 MOVE #Geneva,-(SP)
 MOVE #9,-(SP)
 Center ©1986 by Chris Yerga,178,30
 MOVE #12,-(SP)
 Center The BitNapper is a tool which simplifies,178,50
 Center the use of BitMapped graphics with the MDS system.,178,62
 Center It allows the user to cut bitmaps directly off,178,74
 Center the screen from any application that supports,178,86
 Center desk accessories.,178,98
 Center To learn about graphic techniques and all other,178,115
 Center aspects of Mac programming read MacTutor magazine.,178,127
 MOVE #1,-(SP)
 Center call (714) 630-3730  to subscribe,178,150
@1 CLR  -(SP)
 MOVE (SP)+,D0
 BEQ  @1
 MOVE.L thePort,-(SP);restore the old grafport
 MOVE.L A2,-(SP) ;lose the window and free
 _DisposWindow   ;up it's memory
 CLR  -(SP) ;unHiLight the menu
 BRA  CtlDone
 CLR  -(SP) ;room for INTEGER
 MOVE.L A3,-(SP) ;push stringPtr
 CLR.L  D3
 MOVE (SP)+,D3 ;get string width
 DIVU #2,D3
 SUB  D3,D4 ;subtract width/2 from center
 MOVE D4,-(SP) ;push x
 MOVE D5,-(SP) ;push y
 MOVE.L A3,-(SP)
 MOVE.L dCtlStorage(A4),-(SP) ;menuHandle
 MOVE #2,-(SP)   ;item #2
 PEA  CheckMark  ;VAR CheckMark
 CLR  D0;set marked to FALSE
 LEA  CheckMark,A1
 TST  (A1);is it marked?
 BNE  @1;Yes..lets unmark it
 MOVE #$0101,D0  ;set marked to TRUE
@1 MOVE.L dCtlStorage(A4),-(SP)  ;menuHandle
 MOVE #2,-(SP)   ;item #2
 MOVE D0,-(SP)   ;marked: BOOLEAN
 CLR  -(SP) ;unHiLight the menu
 BRA  CtlDone
 SUBQ   #4,SP  ;Room for result
@1 SUBQ #4,SP  ;Get it again
 MOVE.L (SP)+,D0 ;Get tickCount in D0
 CMP.L  (SP),D0  ;Has it changed?
 BEQ    @1;No, loop
 ADDQ   #4,SP  ;else pop old tickCount
 RTS    ;and return
 PEA  thePort    ;save the GrafPort
 MOVE.L dCtlStorage(A4),-(SP) ;menuHandle
 MOVE #2,-(SP)   ;item #2
 PEA  CheckMark  ;VAR CheckMark
 _GetItmMark;see if it's marked
 MOVE #$FFFF,D4  ;assume no constraint
 LEA  CheckMark,A1
 TST  (A1);is it marked?
 BEQ  @0; constraint
 MOVE #$FFF0,D4  ;yes...word constraint
@0 _HideCursor   ;hide the cursor
@1 PEA  StartPoint ;VAR MousePoint
 _GetMouse;get the mouse location
 PEA  StartPoint
 _LocalToGlobal  ;convert to global coordinates
 LEA  StartPoint,A3
 AND  D4,2(A3) ;constrain the horiz coord
 MOVE.L (A3),4(A3) ;TopLeft of rect
 ADD  #4,4(A3) ;add 4 to bottom
 ADD  #16,6(A3)  ;add 16 to right
 MOVE.L A3,-(SP)
 _InverRect ;invert the rect
 BSR  Sync;wait for a couple VBL's
 BSR  Sync
 MOVE.L A3,-(SP) ;invert it again
 _Button;see if Button is pressed
 MOVE (SP)+,D0 ;get result
 BNE  @2;button was pressed
 BRA  @1;not pressed...continue
@2 PEA  StartPoint ;draw the rect

@3 PEA  NewPoint ;VAR NewPoint
 _GetMouse;get the mouse location
 PEA  NewPoint
 _LocalToGlobal  ;convert to global coordinates
 LEA  NewPoint,A3;get ptr to NewPoint
 AND  D4,2(A3) ;constrain the horiz
 MOVE.L (A3),D0  ;get newpoint
 LEA  EndPoint,A3
 CMP.L  (A3),D0  ;has it changed?
 BEQ  @4;no...check for Button up
 BSR  Sync
 PEA  StartPoint ;yes...erase old rect
 MOVE.L 4(A3),(A3) ;make Point the new EndPoint
 PEA  StartPoint
 _InverRect ;and invert the new rect
@4 CLR  -(SP)
 _Button;Button up?
 MOVE (SP)+,D0
 BNE  @3;no...keep going
 PEA  StartPoint
 _InverRect ;erase the rect
 CLR  -(SP) ;room for BOOLEAN
 PEA  StartPoint
 _EmptyRect ;is the rectangle empty?
 MOVE (SP)+,D0 ;get result
 BNE  StealExit  ;Yes...get lost
 LEA  StartPoint,A1;get pointer
 LEA  NewPoint,A0;get pointer
 MOVE.L (A1),(A0);copy TopLeft
 MOVE.L 4(A1),4(A0);copy BottomRight
 MOVE.L (A0),-(SP) ;SrcPoint
 PEA  4(A0) ;VAR DestPoint
 _SubPt ;subtract SrcPt from DestPt
 ;and store result in DestPt
 LEA  NewPoint,A0;get pointer
 CLR.L  (A0);set topleft = 0,0
 MOVE 6(A0),D0 ;get Right in D0
 ADD  #$F,D0
 LSR  #3,D0 ;divide by 8 to get rowBytes
 MULU 4(A0),D0 ;multiply by the height
 ADD  #20,D0;make room for header
 LEA  BitMapLen,A0
 MOVE.L D0,(A0)  ;save the length
 _NewPtr;get a nonrelocatable block
 LEA  BitMapPtr,A1
 MOVE.L A0,(A1)  ;save pointer
 MOVE.L A0,A4    ;copy to A6
 LEA  NewPoint,A0;get pointer
 MOVE 6(A0),D0 ;get Right in D0
 ADD  #$F,D0
 LSR  #3,D0 ;divide by 8 to get rowBytes
 CLR.L  (A4)+    ;clear space for BasAddr ptr
 MOVE D0,(A4)+ ;store rowBytes
 CLR.L  (A4)+    ;topLeft of Bounds
 MOVE.L 4(A0),(A4)+;bottomRight...
 MOVE.L (A1),A1  ;get pointer to storage again
 MOVE.L A4,(A1)  ;store basAddr
 MOVE.L (A5),A0  ;get globalPtr
 PEA  ScreenBits(A0) ;srcBits
 MOVE.L A1,-(SP) ;destBits
 PEA  StartPoint ;srcRect
 PEA  NewPoint ;destRect
 CLR  -(SP) ;mode = srcCopy
 CLR.L  -(SP)    ;no maskRgn
 _CopyBits;copy the data from the screen
 ;to our BitMap
 MOVE #100,-(SP) ;x coordinate of dialog
 MOVE #80,-(SP)  ;y coordinate
 PEA  'Save BitMap as:' ;prompt
 PEA  'Untitled.BMAP';default name
 CLR.L  -(SP)    ;standard dialog
 PEA  SFReply    ;reply record
 MOVE #1,-(SP)   ;routine selector
 LEA  SFReply,A0
 TST.B  (A0);were we successful?
 BEQ  PurgeBitMap;no...
 LEA  IOParam,A2 ;ptr to ParamBlock
 CLR.L  12(A2)   ;no completion
 LEA  FileName,A0
 MOVE.L A0,18(A2);filename ptr
 MOVE VRef,22(A2);VrefNum
 CLR.B  26(A2)   ;vers #
 _MakeFile;create the file
 ErrCheck ;are we ok?
 MOVE.B #2,27(A2);write-only access
 LEA  APBuffer,A0
 MOVE.L A0,28(A2);access path buffer
 _Open  ;open the file
 ErrCheck ;ok?
 MOVE.L BitMapLen,D4 ;get length
 LSR.L  #3,D4    ;divide by 8
 MOVE.L BitMapPtr,A3 ;get ptr to data
 LEA  LineBuffer,A1
 MOVE #7,D3 ;8 bytes per line
 MOVE.L #'DC.B',(A1)+;store the line header
 MOVE.B #' ',(A1)+
@1 MOVE.B (A3)+,D0 ;get the next byte of data
 BSR  HexToAscii ;convert it
 MOVE.B #'$',(A1)+ ;store it as $xx
 MOVE D1,(A1)+
 MOVE.B #',',(A1)+
 DBRA D3,@1 ;have we done 7 bytes?
 SUBA #1,A1 ;yes...finish the line
 MOVE.L #$200D2020,(A1)+
 LEA  LineBuffer,A0;and write it to disk
 MOVE.L A0,32(A2);ptr to our line of text
 MOVE.L #38,36(A2) ;write 38 bytes
 CLR  44(A2);standard positioning
 CLR.L  46(A2)
 _Write ;write it
 DBRA D4,DoALine ;are we done?
 ;yes...finish it off
 CLR  28(A2)
 MOVE.L #'TEXT',32(A2)  ;set the filetype
 MOVE.L #'EDIT',36(A2)    ;and the creator
 MOVE.L A2,A0    ;close the file
 MOVE.L A2,A0    ;flush out any buffers
 LEA  BitMapPtr,A0 ;get ptr
 MOVE.L (A0),A0
 _DisposPtr ;release the block
 MOVE.L thePort,-(SP);restore the grafPort
 CLR  -(SP) ;unHiLight the menu
 BRA  CtlDone
 LEA  MenuID,A1
 MOVE (A1),-(SP) ;remove the menu from the list
 move.l DCtlStorage(A4),-(SP) ;push the handle
 _DisposMenu;free up the memory
 clr.l  DCtlStorage(A4) ;no longer have a window.
 MOVEM.L (SP)+,A0-A6/D0-D7;restore regs
 MOVEQ  #0,D0

;  HexToAscii routine -> converts a hex byte to an ASCII word
;on entry:
;D0 = Hex byte to be converted
;on return:
;D1 = ASCII word result
;uses D0,D1,D4,A0

 MOVE.B D0,D2    ;save copy of byte
 LSR  #4,D0 ;Get the high nibble
 ANDI #$0F,D0    ;mask out all extraneous bits
 LEA  ByteTable,A0 ;Get base address of table
 MOVE.B (A0,D0),D1 ;Move 1st ascii byte into D1
 ASL  #8,D1 ;move  byte to the proper position
 ANDI #$0F,D2    ;get the low nibble
 MOVE.B (A0,D2),D0 ;Get 2nd ascii byte
 OR.W D0,D1 ;store 2nd byte in word
 DC.B '0123456789ABCDEF'

 MOVE D0,D6 ;get a copy of the error code
 CLR.L  -(SP)    ;room for WindowPtr
 CLR.L  -(SP)    ;allocate storage in heap
 PEA  ErrorRect  ;bounds
 PEA  'Title?'   ;title..unused
 MOVE #$0101,-(SP) ;visible
 MOVE #1,-(SP)   ;dialog-style window
 MOVE.L #-1,-(SP);put it in front
 CLR  -(SP) ;noGoAway
 CLR.L  -(SP)    ;refcon
 MOVE.L (SP)+,A2 ;save windowPtr
 PEA  thePort    ;VAR thePort
 _GetPort ;save current grafport
 MOVE.L A2,-(SP) ;make help window current port

 MOVE #Chicago,-(SP) ;set font
 MOVE #12,-(SP)  ;12 point
 Center That operation was interrupted by an,158,30
 Center I/O error.  Make sure that your disk is,158,43
 Center not write-protected.,158,56
 MOVE.L #158,D4  ;midPoint
 MOVE #75,D5;Y coordinate
 LEA  ErrString,A0 ;stringPtr
 MOVE D6,D0 ;get the error code in D0
 EXT.L  D0;extend to 32 bit precision
 MOVE #0,-(SP)   ;routine selector for numtostring
 BSR  CenterText ;display the error code
@1 CLR  -(SP)    ;wait for a button press
 MOVE (SP)+,D0
 BEQ  @1
 MOVE.L thePort,-(SP);restore the old grafport
 MOVE.L A2,-(SP) ;lose the window and free
 _DisposWindow   ;up it's memory
 BRA  PurgeBitMap;clean up and exit

CheckMark DC.W 0 ;determine if item is checked
StartPointDC.L 0 ;topLeft of rectangle
EndPointDC.L0  ;bottomRight
NewPointDC.L0,0  ;temp storage of points & rects
BitMapPtr DC.L 0 ;pointer to bitMap mem block
BitMapLen DC.L 0 ;length of bitMap mem block
thePort DC.L0  ;temp storage for grafPtr

WindowRectDC.W 60,78,220,434
ErrorRect DC.W 100,98,185,414

IOParam DCB.W  40,0;IO ParamBlock

SFReply DC.W0  ;Standard file reply record
 DC.L '????'
VRef  DC.W0
Vers  DC.W0
FileNameDCB.B  64,0

APBufferDCB.B  522,0 ;access path buffer
LineBufferDCB.B  44,0;buffer for TEXT line 
ErrString DCB.B  8,0 ;storage for string  of errorcode


Community Search:
MacTech Search:

Software Updates via MacUpdate

TechTool Pro 9.5.1 - Hard drive and syst...
TechTool Pro has long been one of the foremost utilities for keeping your Mac running smoothly and efficiently. With the release of version 9, it has become more proficient than ever. TechTool... Read more
Jamf Pro 9.99.0 - Powerful sysadmin/ente...
Jamf Pro (formerly Casper Suite) is the EMM tool that delights IT pros and the users they support by delivering on the promise of unified endpoint management for Apple devices. At Jamf, connecting... Read more
VueScan 9.5.78 - Scanner software with a...
VueScan is a scanning program that works with most high-quality flatbed and film scanners to produce scans that have excellent color fidelity and color balance. VueScan is easy to use, and has... Read more
Adobe Lightroom 6.10.1 - Import, develop...
Adobe Lightroom is available as part of Adobe Creative Cloud for as little as $9.99/month bundled with Photoshop CC as part of the photography package. Lightroom 6 is also available for purchase as a... Read more
iPhoto Library Manager 4.2.7 - Manage mu...
iPhoto Library Manager allows you to organize your photos among multiple iPhoto libraries, rather than having to store all of your photos in one giant library. You can browse the photos in all your... Read more
Smultron 9.4 - Easy-to-use, powerful tex...
Smultron 9 is an elegant and powerful text editor that is easy to use. Use it to create or edit any text document. Everything from a web page, a note or a script to any single piece of text or code.... Read more
TextSoap 8.4 - Automate tedious text doc...
TextSoap can automatically remove unwanted characters, fix up messed up carriage returns, and do pretty much anything else that we can think of to text. Save time and effort. Be more productive. Stop... Read more
Merlin Project 4.2.3 - $349.00
Merlin Project is the leading professional project management software for OS X. If you plan complex projects on your Mac, you won’t get far with a simple list of tasks. Good planning raises... Read more
QuarkXPress - Desktop publishin...
QuarkXPress 2017 is the new version that raises the bar for design and productivity. With non-destructive graphics and image editing directly within your layout, you no longer have to choose between... Read more
Path Finder 7.5 - Powerful, award-winnin...
Path Finder makes you a master of file management. Take full control over your file system. Save your time: compare and synchronize folders, view hidden files, use Dual Pane and full keyboard... Read more

Latest Forum Discussions

See All

Zombie Gunship Survival Beginner's...
The much anticipated Zombie Gunship Survival is here. In this latest entry in the Zombie Gunship franchise, you're tasked with supporting ground troops and protecting your base from the zombie horde. There's a lot of rich base building fun, and... | Read more »
Mordheim: Warband Skirmish (Games)
Mordheim: Warband Skirmish 1.2.2 Device: iOS Universal Category: Games Price: $3.99, Version: 1.2.2 (iTunes) Description: Explore the ruins of the City of Mordheim, clash with other scavenging warbands and collect Wyrdstone -... | Read more »
Mordheim: Warband Skirmish brings tablet...
Legendary Games has just launched Mordheim: Warband Skirmish, a new turn-based action game for iOS and Android. | Read more »
Magikarp Jump splashes onto Android worl...
If you're tired ofPokémon GObut still want something to satisfy your mobilePokémon fix,Magikarp Jumpmay just do the trick. It's out now on Android devices the world over. While it looks like a simple arcade jumper, there's quite a bit more to it... | Read more »
Purrfectly charming open-world RPG Cat Q...
Cat Quest, an expansive open-world RPG from former Koei-Tecmo developers, got a new gameplay trailer today. The video showcases the combat and exploration features of this feline-themed RPG. Cat puns abound as you travel across a large map in a... | Read more »
Jaipur: A Card Game of Duels (Games)
Jaipur: A Card Game of Duels 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: ** WARNING: iPad 2, iPad Mini 1 & iPhone 4S are NOT compatible. ** *** Special Launch Price for a limited... | Read more »
Subdivision Infinity (Games)
Subdivision Infinity 1.03 Device: iOS Universal Category: Games Price: $2.99, Version: 1.03 (iTunes) Description: Launch sale! 40% Off! Subdivision Infinity is an immersive and pulse pounding sci-fi 3D space shooter. https://www.... | Read more »
Clash of Clans' gets a huge new upd...
Clash of Clans just got a massive new update, and that's not hyperbole. The update easily tacks on a whole new game's worth of content to the hit base building game. In the update, that mysterious boat on the edge of the map has been repaired and... | Read more »
Thimbleweed Park officially headed to iO...
Welp, it's official. Thimbleweed Park will be getting a mobile version. After lots of wondering and speculation, the developers confirmed it today. Thimbleweed Park will be available on both iOS and Android sometime in the near future. There's no... | Read more »
Pokémon GO might be getting legendaries...
The long-awaited legendary Pokémon may soon be coming to Pokémon GO at long last. Data miners have already discovered that the legendary birds, Articuno, Moltres, and Zapdos are already in the game, it’s just a matter of time. [Read more] | Read more »

Price Scanner via

Huawei Unveils New ‘Business-Styled’ MateBook...
Huawei has introduced a trio of new MateBook laptops, expanding its mobile portfolio and building on its success in delivering attractive and powerful high-end devices. The company claims the HUAWEI... Read more
Deal! Gold 12-inch 1.2GHz Retina MacBook for...
Amazon has the 2016 Gold 12″ 1.2GHz Retina MacBook (MLHF2LL/A) on sale for $350 off MSRP for a limited time. Shipping is free: - 12″ 1.2GHz Gold Retina MacBook: $1249.99 $350 off MSRP We expect this... Read more
13-inch 2.0GHz MacBook Pros on sale for $100...
B&H has the non-Touch Bar 13″ 2.0GHz MacBook Pros in stock today and on sale for $100 off MSRP. Shipping is free, and B&H charges NY & NJ sales tax only: - 13″ 2.0GHz MacBook Pro Space... Read more
15-inch 2.2GHz Retina MacBook Pro, Apple refu...
Apple has Certified Refurbished 2015 15″ 2.2GHz Retina MacBook Pros available for $1699. That’s $300 off MSRP, and it’s the lowest price available for a 15″ MacBook Pro. An Apple one-year warranty is... Read more
Apple refurbished 9-inch and 12-inch iPad Pro...
Apple has Certified Refurbished 9″ and 12″ Apple iPad Pros available for up to $160 off the cost of new iPads. An Apple one-year warranty is included with each model, and shipping is free: - 32GB 9″... Read more
Apple Certified Refurbished iMacs available f...
Apple has Certified Refurbished 2015 21″ & 27″ iMacs available for up to $350 off MSRP. Apple’s one-year warranty is standard, and shipping is free. The following models are available: - 21″ 3.... Read more
Sale! 15-inch 2.6GHz Silver Touch Bar MacBook...
DataVision has the 15″ 2.6GHz Silver Touch Bar MacBook Pro (MLW72LL/A) on sale for $2199 including free shipping. Their price is $200 off MSRP, and it’s the lowest price available for this model (... Read more
A Kaby Lake Processor Upgrade For The MacBook...
Now they tell me! Well, actually Apple hasn’t said anything official on the subject, but last week Bloomberg News’s Mark Gurman and Alex Webb cited unnamed “people familiar with the matter”... Read more
Kodak’s Camera-First Smartphone EKTRA Launche...
The Eastman Kodak Company and Bullitt Group have announced the availability of a U.S. GSM version of the KODAK EKTRA Smartphone. The U.S. launch coincides with a software update addressing requests... Read more
Apple Launches App Development Curriculum for...
Apple today launched a new app development curriculum designed for students who want to pursue careers in the fast-growing app economy. The curriculum is available as a free download today from Apple... Read more

Jobs Board

Data Engineer - *Apple* Media Products - Ap...
Changing the world is all in a day's work at Apple . If you love innovation, here's your chance to make a career of it. You'll work hard. But the job comes with more Read more
*Apple* Store Leader Program - Apple, Inc (U...
…Summary Learn and grow as you explore the art of leadership at the Apple Store. You'll master our retail business inside and out through training, hands-on Read more
*Apple* Integration Specialist - A3 Solution...
Apple Integration Specialist Contract-To-HireWe are searching for dedicated, well-experienced and energetic individuals for an information technology corporation Read more
Sr. Software Engineer, *Apple* Online Store...
Changing the world is all in a day's work at Apple . If you love innovation, here's your chance to make a career of it. You'll work hard. But the job comes with more Read more
Senior Engineering Project Manager, *Apple*...
Changing the world is all in a day's work at Apple . If you love innovation, here's your chance to make a career of it. You'll work hard. But the job comes with more Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.