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Real-time Driver
Volume Number:5
Issue Number:10
Column Tag:Assembly Lab

Related Info: Serial Drivers File Mgr (PBxxx) Event Manager
Time Manager

Real-Time Driver

By Jeff E. Mandel, MD MS, New Orleans, LA

A Real-Time Device Driver in MPW Asm

When working in the laboratory or in engineering, it is often necessary to use the Mac to control serial devices. Such devices are generally configured to respond to simple commands, and provide a simple response. An example would be the American Edwards AccuPro™ Volumetric Infusion Pump, which is a device for delivering intravenous infusions of drugs. This device contains an RS-232 interface, supports full duplex 2400 baud communication, and has a simple command language for setting and interrogating the device’s infusion rate, the limits for infused volume and infusion time, the volume already infused, and the status of the pump.

Programming the pump involves four steps; the command string is built in memory, a pointer to this string is placed in a parameter block for a _PBWrite, a _PBRead is used to obtain the pump’s response, and the returned string is decoded. While this may seem simple, one must remember that the serial communication takes a significant amount of time, and could take forever if the pump or the serial line fails. Additionally, the serial communications controller is capable of functioning with minimal CPU supervision, which transpires at interrupt level, and thus, it would be nice to use asynchronous device driver calls, to free the Mac to work on keeping the user interface going, while the serial controller handles the IO in the background.

The program I will describe for performing these tasks is a driver. Most Mac programmers are familiar with drivers from writing DAs, however, a device driver is somewhat of a different animal, particularly when one wishes it to be “real-time” without intervention from the foreground program. The device driver has several purposes:

1) To insulate the application from the peculiarities of the device, so that the device can be changed without requiring a change in the application. Additionally, the device could be simulated by a driver, so that debugging of application code can be done without having to have the physical device.

2) To insulate the application programmer from having to understand how serial communications, real-time IO, etc. work.

3) To permit all of the resources associated with the IO task to be grouped together, so that they can be installed and uninstalled easily.

In writing such a driver, it is important to recall several important factors:

1) Drivers cannot utilize application globals for their own storage.

2) Drivers are only notified of events that pertain to them when they own the frontmost window, and then only receive mouse, keyboard, update, and activate events.

3) Activities which occur at interrupt level (i.e. ioCompletion routines, Vertical retrace tasks, Time manager tasks, etc.) are extremely limited in what they can do, due to the uncertainty of the heap.

In order to write such a driver, several decisions were made:

1) The driver utilizes app1Evts to signal that it needed to regain control. Thus, the serial reads and writes utilize an ioCompletion routine which simply posts an app1Evt.

2) Serial driver calls have a time limit. When the serial call is queued (asynchronously), a Time manager task is primed. If the serial IO completed first, it stops the Time manager task from completing by setting the tmCount field to zero, and if the read or write did not complete within the specified time, the time manager task issues a _KillIO call on the relevant serial driver. This results in the ioCompletion routine being called, which notifies the driver. The time manager task is contained in a resource of type ‘TMMR’, which is loaded into the heap, locked, dereferenced, and the pointer placed in the tmAddr field of the time manager queue entry. The resource also contains a longword of private storage, which holds a pointer to a private parameter block (used for the KillIO call).

3) App1evts are posted with the parameter block pointer of the completed serial call as the message. The pump driver places the parameter block pointer of the pending pump driver in the ioMisc field of the serial call parameter block so the downstream routines can keep track of it. Alternatively, the downstream routines could get this pointer from the dCtlQHead field of the DCE.

4) App1Evts are passed to the driver by a GetNextEvent filter. This routine is called at the end of the _GetNextEvent trap, with A1 pointing to the EventRecord, and boolean result in both D0 and at 4(A7) (See Macintosh Technical Note #85). If the what field of the EventRecord equals app1Evt, the routine examines the message, and if it contains a negative word in the ioRefNum field of the parameter block pointed to by the message, it processes the event. If the event is processed, the filter sets the boolean result to False, so the the application knows not to deal with it. In either case, the routine exits by a JMP to the previous contents of the JGNEFilter global. This pointer is stored locally in our GNEFilter proc.

5) The GNEFilter is a separate resource (type = ‘GNEF’), which is loaded in the pump driver Open routine. The resource is patterned after the DRVR resource, in that it contains an offset to the code as its first word, and some local storage is provided between this word and the beginning of the code. The GNEFilter is loaded into the heap during the driver Open routine, using a _GetNamedResource call. This is done so that several drivers can share the GNEFilter, since only the first driver will load the resource into the heap. The GNEFilter keeps track of which resources have opened it by keeping their reference numbers in the local storage. Duplicate entries are avoided. The GNEFilter also keeps a parameter block pointer in its private storage for its private use.

6) When the GNEFilter processes an app1Evt with a negative ioRefNum, it accesses the parameter block pointer in the ioMisc field of the parameter block referenced in the message field of the event, and checks to see that the ioRefNum of this PB is in the list of cooperating drivers in the GNEFilter private storage. If it is, then we place the event pointer in the csParam field of the GNEFilter’s private parameter block, set the csCode to accEvent, and the ioRefNum to reference number of the ioMisc parameter block (this will be the ioRefNum of our driver; the ioRefNum of the parameter block passed in the message field will be one of the serial drivers). We then issue an immediate _Control call.

7) The Control routine supports four csCodes - accEvent, accRun, KillIO, and GoodBye. Goodbye simply JMPs to the Close routine. KillIO issues KillIO calls on the serial drivers and returns. AccRun asynchronously queues a Status call on the driver to inquire the pump status (thus, irrespective of what the application does, it will be notified of the pump status periodically). The accEvent csCode is generated by our GNEFilter, and is used to allow the driver to respond to serial IO completion at event level (that is, when the heap is consistent). The routine examines the low nibble of the ioTrap field of the parameter block pointed to by the event message. If the trap was _Write, the routine sets up the parameter block for single character reads on the serial input channel and queues an asynchronous _Read. If the trap was _Read, the routine examines the character read. If the character is a carriage return (ASCII 13), the accumulated input buffer is sent to be digested, if it is an asterisk (*), it is ignored (the McGaw pump generates these periodically to let us know it is pumping), and if it is any other character, it is appended to the input buffer. In the latter two cases, the routine queues another asynchronous _Read. In the first case, the routine posts an app2Evt with the message the pointer to the original parameter block used to queue the status call, and exits via JIODone.

8) The Status routine uses the three words in the csParam field of the parameter block to figure out what the application wants the driver to send to the pump. The Request field is used to look up a single character in a table (which is loaded from a resource of type ‘PDDF’). This character specifies which of the pump functions is to be interrogated or set, as specified in the Action field. The Info field contains the numeric value to be passed to the pump and/or returned to the application. The pump in general wants decimal integers, but in some cases wants a hex word, and the formatting information is specified in the table. Having constructed the string to be sent to the pump, the routine allocates a parameter block, places the string pointer in the ioBuffer field, the pointer to the driver Status parameter block in the ioMisc field, fills in the ioCompletion address, and queues an asynchronous _Write. Note that if the noQueueBit of the trap is set, the Status routine places the request at the head of the queue. It does this by checking the queue, and if there are zero or one queue entries, issuing the _Status call asynchronously, but if there are two or more queue entries, it slips the request after the current queue head by changing the qLink fields of the qHead PB and the PB in question.

9) The Open routine loads the GNEFilter and time manager task (as detailed above), opens the serial drivers and configures them for the pump, loads the pump request table, allocates the dCtlStorage handle, and sets up the driver globals there.

10) The Close routine removes the time manager task, closes the serial ports, removes the driver’s reference number from the GNEFilter private storage, and restores the previous GNEFilter if it is the last value there. It then deallocates all the pointers and handles it allocated and exits.

The application thus needs only do the following things to utilize the driver:

1) Open the driver

2) Allocate a pointer for the parameter block, setting the three words in the csParam field to pass the desired function, and queue the _Control call. The call should be made asynchronously. Immediate calls can be used to “jump the line”, that is, make sure the call is the next one to be taken from the queue.

3) The event loop should handle app2Evts by first processing the information in the ioResult and csParam fields, then disposing of the pointer.

4) If the pump driver is to function irrespective of what the application is doing, the application must frequently call _GetNextEvent with the event mask app1Evt mask set. In order to guarantee this you will need a FilterProc for ModalDialogs and Alerts which calls _GetNextEvent with the event mask set to app1Mask when the routine receives a null event, and a DragHook and MenuHook which calls _GetNextEvent with the event mask set to app1Mask. Additionally, any compute-intensive routines might include a call to the DragHook routine. The alternative is to keep track of driver calls and repost the ones that time out.

5) Call _SystemTask if you want periodic events.

6) Prior to closing the driver, you should do one of two things:

a) Issue a _KillIO call on the driver to flush the queue.

b) Wait until the queue empties itself. This can be done by waiting until the dCtlQHead field of the driver’s DCE is zero.

This is necessary because the _Close trap sits and waits for the driver to complete the pending request. The driver cannot complete the request, however, without the event loop, so we hang forever.

7) While the driver is set up to handle goodbye kisses to close the structures, it is much safer to close the driver explicitly, due to the serious adverse consequences of exiting without restoring the JGNEFilter pointer. The truly paranoid can load the GNEFilter into the system heap. The same caveat applies to the time manager queue entry (the pointer, not the routine) - if this is deallocated but not removed from the time manager queue, bad stuff will happen. I have not extensively worked on making the driver “safe as milk”, in general, during debugging, if it crashed, I rebooted. But then, I just got my Mac II.

8) The program is written in MPW assembler, and uses the structured programming macros. I have hacked up some of these to make them work properly for writing drivers. The only significant change is in DRVRExit, which checks the noQueueBit of the argument, and if it is clear, exits via the JIODone vector, otherwise, RTS.

The code for the driver, the GNEFilter, and the timer task, as well as the rez files and the shell commands to build the driver are presented below. Note that I actually build the driver as a desk accessory. This is done so that I can install it with the DA Mover. This is easier during development, but once the driver is debugged, it can be changed with the resource editor.

The sources have been hacked for the sake of brevity. All INCLUDES were deleted, many equates omitted, and code specific to the pump deleted as well. If you really want to assemble this, get the source disk.

 TITLE  ‘Pump driver’
ParamBlockSize equ 108
ActionOffsetequ  csParam
RequestOffset  equ csParam+2
InfoOffsetequ  csParam+4

EnabledFlagsequ  (1<<dStatEnable) \
+ (1<<dCtlEnable) + (1<<dNeedTime)

EventMask equ  1<<app1Evt

DStore  Record 0
WriteUnit DS.W   1
TimeCount DS.L   1
KillBlock DS.L   1
IncomingLength DS.B1
IncomingString DS.B9
 Align  2
TableOffset equ  *
Table   DS.W5

IOStringRecord 0
OutgoingString DS.B8
ReadBufferDS.B   1
 Align  2
StringAllocation equ *

 DRVRBeginSave=A2-A4/D1-D2,\ with=(DStore,IOString,GNEGlobals);

 DC.B   EnabledFlags
 DC.B   0
 DC.W 7*60;  7 seconds
 DC.W EventMask
 DC.W 0 ; No menu

 DC.W DRVRControl
 DC.W DRVRStatus

 DC.B ‘PumpDriver’


*  Load the pump request table from the
*  resource fork

 Call _GetNamedResource:L (#’PDDF’:L,  #’Table’:A ),A4:L
 EXG  A0,A4
 If#  D0LT.L#0 Then.S
 MOVE.W #openErr,ioResult(A4)
 EXG  A0,A4
 MOVE.L A0,-(SP)

*  Get a new handle to put the Driver
*  globals and the pump request table into

 MOVE.L A1,-(SP)
 ADD.L  #TableOffset,D0
 _NewHandle ,clear
 MOVE.L A0,dCtlStorage(A2)
 MOVE.L (A0),A1
 ADD.L  #TableOffset,A1
 MOVE.L (ResHandle),A0
 Call _ReleaseResource ( ResHandle:L)
 MOVE.L (SP)+,A1

*  Open the serial drivers and set them up
*  for the pump  (I have ommitted the .AIN code
*  since it is identical
 MOVE.L #ParamBlockSize,D0
 _NewPtr ,clear
 LEA    #’.AOUT’,A2
 MOVE.L A2,ioNamePtr(A0)
 MOVE.B #fsWrPerm,ioPermssn(A0)
 If# D0 NE.W #noErrThen.S
 MOVE.L (SP)+,A0
 MOVE.W #openErr,ioResult(A0)
 MOVE.W ioRefNum(A0),

*  Set the output port for 2400 baud, 1
*  stop, no parity, eight bit communication

 MOVE.W #PortSetting,csParam(A0)
 MOVE.W #8,csCode(A0)

*  Set up a parameter block for the serial
*  IO timeout function. The pointer is
*  stored in the Driver private storage.
*  Insert task into the time manager queue
*  which performs the IO timeout function.

 MOVE.L #ParamBlockSize,D0
 _NewPtr ,clear
 MOVE.L A0,KillBlock(A3)
 MOVE.L #1500,TimeCount(A3)
 MOVE.L #tmQSize,D0
 MOVE.L A0,KillTask(A3)
 Call TimeOutInstall ( A0:L ,
 KillBlock(A3):L )

*  Install the GNEFilter

 Call _GetNamedResource:L ( #’GNEF’:L
 , #’GNEFilter’:A ),A2
 CMPA #0,A2
 If#  NEThen.S
 MOVE.L (A2),A2
 MOVE.W Drvr_num(A2),D1
 If#  D1 EQ.W  #0Then.S
 MOVE.W (A2),D0
 LEA  (A2,D0.W),A3
 MOVE.L JGNEFilter,-4(A3)
 MOVE.L #ParamBlockSize,D0
 _NewPtr ,clear
 MOVE.L A0,Control_Ptr(A2)
 MOVE.W dCtlRefNum(A1),D2
 If# D1 LE #entry_slots Then.S
 For# D1 DownTo #1 Do.S
 If# Drvr_num(A2,D1.W*2) EQ.W
 D2 Then.S
 ADD.W  #1,Drvr_num(A2)
 MOVE.W Drvr_num(A2),D1
*  Get the Resource ID for the driver to
*  calculate the ID of owned Alert
*  (sub ID 0)

 LEA  DRVREntry,A0
 LINK A6,#-12
 Call _GetResInfo ( A0:L , (A6):A ,
 4(A6):A , 8(A6):L )
 MOVE.W (A6),D2
 MULU #32,D2
 ADD.W  #Owned,D2
 Call _CautionAlert:W ( D2:W ,
 0:L ),CC
 MOVE.L (SP)+,A0
 MOVE.W #openErr,ioResult(A0)
 MOVE.L A0,-(SP)
 MOVE.L dCtlStorage(A1),A2
 MOVE.L (A2),A3

 MOVE.L #ParamBlockSize,D0
 _NewPtr ,clear
 MOVE.W ReadUnit(A3),ioRefNum(A0)
 MOVE.W WriteUnit(A3),    ioRefNum(A0)
 MOVE.L KillTask(A3),A0
 MOVE.L KillBlock(A3),A0
 Move.L A2,A0
 MOVE.W dCtlRefNum(A1),D2
 Call _GetNamedResource:L (
 #’GNEF’:L , #’GNEFilter’:A ),A2
 CMPA #0,A2
 If#  NEThen.S
 MOVE.L (A2),A3
 MOVE.W Drvr_num(A3),D1
 If#  D1 GT.W  #1Then.S
 While# D2 NE.W
 Drvr_num(A3,D1.W*2) Do.S
 DBEQ.W D1,DuplicateClose
 If# D1 NE.W Drvr_num(A3) Then.S
 ADD.W  #1,D1
 For# D1To Drvr_num(A3)
 LEA  Drvr_num(A3,D1.W*2),
 MOVE.W (A4),-2(A4)
 SUBQ.W #1,Drvr_num(A3)
 ElseIf#.SD1 EQ.W #1 Then.S
 If# D2 NE.W Drvrentries(A3)
 MOVE.L GNE_Next(A3),
 Call _ReleaseResource ( A2:L )
 MOVE.W #noErr,D0
 MOVE.L (SP)+,A0
 DRVRExit ioTrap(A0)
 MOVE.W noErr,D0


*  First, check to see if this is an
*  immediate call. If so, it “jumps the
*  line”, and will be the next call serviced
*  after the current one (if any) is
*  completed.

 MOVE.W ioTrap(A0),D1
 BTST #noQueueBit,D1
 If#  NEThen.S ;Immediate call
 LEA  dCtlQHead(A1),A2
 CMP.L  #0,(A2)
 If#  EQThen.S ;queue empty
 _Status ,async

 MOVE.L (A2),D1
 CMP.L  4(A2),D1
 If# EQ Then.S ; only one entry
 _Status ,async

* Fool the driver into thinking this is an
* asynchronous queue entry
 MOVE.W ioTrap(A0),D1
 BCLR   #noQueueBit,D1
 BSET   #asyncTrpBit,D1   MOVE.W D1,ioTrap(A0)
 MOVE.W #1,ioResult(A0)

*  Get parameter block of queue head, put
*  qLink of qHead in current parameter
*  block;and replace it with current
*  parameter block pointer

 MOVE.L (A2),A2
 MOVE.L (A2),(A0)
 MOVE.L A0,(A2)
 MOVE.L dCtlStorage(A1),A4
 MOVE.L (A4),A4

 MOVE.W TableLen(A4),D1
 MOVE.W RequestOffset(A2),D0
 If#  D0 GT.W D1 Then.S ;Not a valid
 ;pump call
 MOVE.W #statusErr,ioResult(A2)
 MOVE.W #app2Evt,A0
 MOVE.L #statusErr,D0
 DRVRExit ioTrap(A0)

 MOVE.L #ParamBlockSize,D0
 _NewPtr ,clear

*  The next section of code places a pointer
*  to the needed string, and the number of
*  characters, into the parameter block. It
*  was ommitted from this listing. 

 MOVE.W WriteUnit(A4),
 LEA  SerialComplete,A3
 MOVE.L A3,ioCompletion(A0)
 _Write ,async

*  Set up the time manager task to KillIO
*  on the channel in TimeCount
*  milliseconds. KillBlock is a previously
*  allocated parameter block.

 MOVE.L KillBlock(A4),A0
 MOVE.L WriteUnit(A4),
 MOVE.L KillTask(A4),A0
 MOVE.L TimeCount(A4),D0
 MOVE.L #noErr,D0
DRVRControl DRVREnter

 If#  csCode(A0) EQ.W#accEventThen
 MOVE.L csParam(A0),A2
 MOVE.L message(A2),A2
 MOVE.W ioTrap(A2),D2
 AND.W  #$00FF,D2
 MOVE.W ioResult(A2),D3

*  Check to see the serial call was not
*  aborted by KillIO. If so, inform the
*  application, dequeue the pump driver
*  call, and return

 If# D3 EQ.W #abortErr  Then.S
 MOVE.L ioMisc(A2),A0
 EXG  A0,A2
 MOVE.W #TimeOut,ioResult(A2)
 ADD.W  D2,ioResult(A2)
 MOVE.W #app2Evt,A0
 MOVE.L #TimeOut,D0
 DRVRExit ioTrap(A0)

*  The serial call did not time out, so
*  figure out if it was a READ or a WRITE
*  by examining the low nybble of the trap
*  field of the parameter block.

 If#  D2EQ.W#aRdCmdThen

*  READ - examine the character read. If it
*  is a ‘*’, we ignore it and queue another
*  read. If it is a carriage return, we call
*  RespondToRead to interpret the
*  completed pump response. Any other
*  character is incorporated into the string
*  being built at IncomingString and we
*  increment the IncomingLength byte,
*  then queue another READ. If we exceed
*  8 characters, we have a problem.

 MOVE.L ioBuffer(A2),A3
 MOVE.B (A3),D1
 MOVE.L dCtlStorage(A1),A4
 MOVE.L (A4),A4
 If#  D1EQ.B#13  Then.S
 MOVE.L KillTask(A4),A0
 CLR.L  tmCount(A0)
 MOVE.L ioMisc(A2),A3
 Call RespondToRead
 MOVE.L ioMisc(A2),A0
 EXG  A0,A2
 MOVE.W #app2Evt,A0
 CLR.B  IncomingLength(A4)
 CLR.L  IncomingString(A4)
 CLR.L  IncomingString+4(A4)
 CLR.L  D0
 DRVRExit ioTrap(A0)
 ElseIf#.S D1 EQ.B #’*’ Then.S
 _Read ,async
 MOVE.B IncomingLength(A4),
 EXT.W  D0
 ADD.W  #1,D0
 If#  D0 LE.W  #8 Then.S
 MOVE.L KillBlock,A0
 MOVE.W ReadUnit(A4),
 MOVE.L ioMisc(A2),A0
 EXG  A0,A2
 MOVE.W #app2Evt,A0
 DRVRExit ioTrap(A0)
 _Read ,async
 ElseIf#.S D2  EQ.W #aWrCmd Then.S
 MOVE.L dCtlStorage(A1),A4
 MOVE.L (A4),A4
 MOVE.L KillBlock(A4),A0
 MOVE.W ReadUnit(A4),
 MOVE.W ReadUnit(A4),
 MOVE.L #1,ioReqCount(A0)
 MOVE.L ioBuffer(A0),A2
 LEA  ReadBuffer(A2),A2
 MOVE.L A2,ioBuffer(A0)
 LEA  SerialComplete,A4
 MOVE.L A4,ioCompletion(A0)
 _Read ,async
 ElseIf#.S csCode(A0) EQ.W #accRun
 MOVE.L A0,-(SP)
 MOVE.L #ParamBlockSize,D0
 _NewPtr ,clear
 MOVE.W dCtlRefNum(A1),
 MOVE.W #S_request,
 MOVE.W #Ask,ActionOffset(A0)
 CLR.L  ioCompletion(A0)
 _Status ,async
 MOVE.L (SP)+,A0
 ElseIf#.S csCode(A0) EQ.W #killCode
 MOVE.L #ParamBlockSize,D0
 MOVE.L dCtlStorage(A1),A2
 MOVE.L (A2),A2
 _NewPtr ,clear
 MOVE.W ReadUnit(A2),
 MOVE.W WriteUnit(A2),
 ElseIf#.S csCode(A0) EQ.W #goodBye

 MOVE.L #noErr,D0
 DRVRExit ioTrap(A0)

The following is the GNEFilter Code:

 TITLE  ‘GNE filter’

StackFrameRECORD {A6Link},DECR
Result  DS.W1
RetAddr DS.L1
A6Link  DS.L1
LocalSize equ    *
 WITH EventRecord,StackFrame

Entry   DC.WGNEFilter;Offset to
 ;GNE filter
 DCB.B  GNEGlobalSize,0

*  If the event is not an app1Evt, go to the
*  next event in the GNE filter chain,
*  which we previously stored in GNE_Next

 LEA    Entry,A0
 CMP.W  #app1Evt,what(A1)
 BNE.S  Out

*  We have an app1Evt. Check to see if the
*  ioRefnum is negative.

 LINK A6,#LocalSize
 MOVE.L message(A1),A2
 MOVE.L ioMisc(A2),A2
 MOVE.W ioRefNum(A2),D1
 If#  GEThen.S

*  We have a negative ioRefnum. Check to
*  see if it is in the list of ioRefnums
*  we are cooperating with. If it is, pass
*  the event to the driver by setting
*  up a parameter block for an immediate
*  call to the control routine.

 MOVE.L Control_Ptr(A0),A2
 LEA    Drvr_num(A0),A0
 MOVE.W (A0)+,D2 
 For# D2 DownTo #1 Do.S
 MOVE.W (A0)+,D0
 If#  D0EQ.WD1 Then.S
 MOVE.W D1,ioRefNum(A2)
 MOVE.W #accEvent,csCode(A2)
 MOVE.L A1,csParam(A2)
 _Control ,immed
 CLR.W  D0
 MOVE.W D0,Result(A6)
 Leave#.S Loop
 LEA    Entry,A0
 MOVE.L GNE_Next(A0),A0
 JMP    (A0)

The following is the timeout task:

 TITLE  ‘Timeout for serial IO’

KillStore DC.L 0
 LEA    KillStore,A0
 MOVE.L (A0),A0

The following contains the timeout routine installtation, and the serial ioCompletion routine

 TITLE  ‘Timeout for serial IO’

Export  ProcedureTimeOutInstall
 ( KillTask:L , KillPtr:L )
 Begin  Save=A0-A2 

 Call _GetNamedResource:L
 ( #’TMMR’:L , #’KillRoutine’:A ),A1
 CMPA #0,A1
 If#  NEThen.S
 MOVE.L (A1),A1
 MOVE.L KillTask(FP),A0
 MOVE.L KillPtr(FP),(A1)
 LEA    4(A1),A1
 MOVE.L A1,tmAddr(A0)
*  Serial Complete - This routine is the
*  ioCompletion routine for the
*  asynchronously serial IO calls from the
*  pump driver. On completion, the routine
*  posts an app1Evt with the message the
*  parameter block of the completed serial
*  call.

Export  ProcedureSerialComplete
 Begin  Save=A5  

 MOVE.L CurrentA5,A5
 MOVE.W #app1Evt,A0

The following are the shell commands to build this as a desk accessory and install it with the DA mover.

Asm TimeOut.a
Asm KillRoutine.a
link  KillRoutine.a.o 
 -o PumpDriver -ra KillRoutine=16 
 -sn ‘Main=KillRoutine’ 
 -rt TMMR=-15296
Asm GNEFilter.a
link  GNEFilter.a.o 
 -o PumpDriver -sn ‘Main=GNEFilter’ 
 -ra GNEFilter=16 -rt GNEF=-15296
Asm Pdriver.a
link Pdriver.a.o TimeOut.a.o -t DFIL 
 -c DMOV -o PumpDriver -da 
 -sn ‘Main=PumpDriver’ -rt DRVR=34
“HD 40:System Folder:Font/DA Mover”  
 PumpDriver test_drvr


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Tweetbot is a full-featured OS X Twitter client with a lot of personality. Whether it's the meticulously-crafted interface, sounds and animation, or features like multiple timelines and column views... Read more
Default Folder X 5.1.6 - Enhances Open a...
Default Folder X attaches a toolbar to the right side of the Open and Save dialogs in any OS X-native application. The toolbar gives you fast access to various folders and commands. You just click on... Read more
Evernote 6.12.3 - Create searchable note...
Evernote allows you to easily capture information in any environment using whatever device or platform you find most convenient, and makes this information accessible and searchable at anytime, from... Read more
Geekbench 4.1.2 - Measure processor and...
Geekbench provides a comprehensive set of benchmarks engineered to quickly and accurately measure processor and memory performance. Designed to make benchmarks easy to run and easy to understand,... Read more
Carbon Copy Cloner 5.0.2 - Easy-to-use b...
Carbon Copy Cloner backups are better than ordinary backups. Suppose the unthinkable happens while you're under deadline to finish a project: your Mac is unresponsive and all you hear is an ominous,... Read more
BetterTouchTool 2.305 - Customize multi-...
BetterTouchTool adds many new, fully customizable gestures to the Magic Mouse, Multi-Touch MacBook trackpad, and Magic Trackpad. These gestures are customizable: Magic Mouse: Pinch in / out (zoom... Read more
calibre 3.8.0 - Complete e-book library...
Calibre is a complete e-book library manager. Organize your collection, convert your books to multiple formats, and sync with all of your devices. Let Calibre be your multi-tasking digital librarian... Read more

The best new games we played this week -...
It's pretty much been one big release after another. We were privy to a bunch of surprises this week, with a lot of games we'd been waiting for quite some time dropping unexpectedly. We hope you're free this weekend, because there is a lot for... | Read more »
Stormbound: Kingdom Wars guide - how to...
Stormbound: Kingdom Wars is an excellent new RTS turned card battler out now on iOS and Android. Lovers of strategy will get a lot of enjoyment out of Stormbound's chess-like mechanics, and it's cardbased units are perfect for anyone who loves the... | Read more »
The best AR apps and games on iOS right...
iOS 11 has officially launched, and with it comes Apple's ARKit, a helpful framework that makes it easier than ever for developers to create mobile AR experiences. To celebrate the occassion, we're featuring some of the best AR apps and games on... | Read more »
Phoenix Wright: Ace Attorney - Spirit of...
Phoenix Wright: Ace Attorney - Spirit of Justice 1.00.00 Device: iOS Universal Category: Games Price: $.99, Version: 1.00.00 (iTunes) Description: ************************************************※IMPORTANT※・Please read the “When... | Read more »
Kpressor (Utilities)
Kpressor 1.0.0 Device: iOS Universal Category: Utilities Price: $4.99, Version: 1.0.0 (iTunes) Description: The ultimate ZIP compression application for iPhone and iPad. - Full integration of iOS 11 with support for multitasking.-... | Read more »
Find out how you can save £35 and win a...
Nothing raises excitement like a good competition, and we’re thrilled to announce our latest contest. We’ll be sending one lucky reader and a friend to the Summoners War World Arena Championship at Le Comedia in Paris on October 7th. It’s the... | Read more »
Another Lost Phone: Laura's Story...
Another Lost Phone: Laura's Story 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Another Lost Phone is a game about exploring the social life of a young woman whose phone you have just... | Read more »
The Witness (Games)
The Witness 1.0 Device: iOS Universal Category: Games Price: $9.99, Version: 1.0 (iTunes) Description: You wake up, alone, on a strange island full of puzzles that will challenge and surprise you. You don't remember who you are, and... | Read more »
Egg, Inc. guide - how to build your gold...
Egg, Inc.'s been around for some time now, but don't you believe for one second that this quirky clicker game has gone out of style. The game keeps popping up on Reddit and other community forums thanks to the outlandish gameplay (plus, the... | Read more »
The best deals on the App Store this wee...
Good news, everyone! Your favorite day of the week has arrived at last -- it's discount roundup day! This fine Wednesday evening we're gathering up the hottest deals on the App Store. We've got action platformers, we've got puzzle games, we've got... | Read more »

Price Scanner via

Looking for a 2017 12″ Retina MacBook? Save $...
Apple has Certified Refurbished 2017 12″ Retina MacBooks available for $200-$240 off the cost of new models. Apple will include a standard one-year warranty with each MacBook, and shipping is free.... Read more
Apple Offering Up To $455 Credit Toward iPhon...
iPhone 8 and 8 Plus are now available at the Apple Store, and you can receive up to $375 credit toward a new iPhone purchase when you trade in your eligible smartphone. Photo Courtesy Apple Just... Read more
AnyTrans Offers iOS Users Three Ways For Movi...
iMobie Inc. today announceed AnyTrans v6.0.1, which now can help iOS users move all data to iPhone 8/8 Plus seamlessly. The software is available both on Mac and Windows and fully able to move all... Read more
Snag a 13-inch 2.3GHz MacBook Pro for $100 of...
B&H Photo has 2017 13″ 2.3GHz MacBook Pros in stock today and on sale for $100 off MSRP, each including free shipping plus NY & NJ sales tax only: – 13-inch 2.3GHz/128GB Space Gray MacBook... Read more
Verizon offers new iPhone 8 for $100-$300 off...
Verizon is offering the new iPhone 8 for up to $300 off MSRP with an eligible trade-in: • $300 off: iPhone 6S/6S Plus/7/7 Plus, Google Pixel XL, LG G6, Moto Z2 Force, Samsung Galaxy S7/S7 edge/S8/S8... Read more
Apple Refurbished 2017 13-inch MacBook Pros a...
Apple has Certified Refurbished 2017 13″ Touch Bar MacBook Pros in stock today and available for $200-$300 off MSRP. A standard Apple one-year warranty is included with each MacBook, and shipping is... Read more
OWC USB-C Travel Dock with 5 Ports Connectivi...
OWC have announced the new OWC USB-C Travel Dock, the latest addition to their line of connectivity solutions. The USB-C Travel Dock lets you connect its integrated USB-C cable to a Mac or PC laptop... Read more
Pelican Products, Inc. Unveils Cases For All...
Pelican Products, Inc. has announced the launch of its full line of cases including Voyager, Adventurer, Protector, Ambassador, Interceptor (for the Apple iPhone 8 and 8 Plus backwards compatible... Read more
$100 off new 2017 13-inch MacBook Airs
B&H Photo has 2017 13″ MacBook Airs on sale today for $100 off MSRP including free shipping. B&H charges NY & NJ sales tax only: – 13″ 1.8GHz/128GB MacBook Air (MQD32LL/A): $899, $100 off... Read more
Apple restocks Certified Refurbished 13-inch...
Apple has Certified Refurbished 2015 13″ MacBook Airs available starting at $719 and 2016 models available starting at $809. An Apple one-year warranty is included with each MacBook, and shipping is... Read more

Jobs Board

Instructional Designer, *Apple* Product Doc...
Job Summary The Apple Product Documentation team is looking for an instructional designer or a video editor to write user documentation for its professional video Read more
*Apple* Retail - Multiple Positions - Apple,...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
Development Operations and Site Reliability E...
Development Operations and Site Reliability Engineer, Apple Payment Gateway Job Number: 57572631 Santa Clara Valley, California, United States Posted: Jul. 27, 2017 Read more
Specialist - Retail Customer Services and Sal...
The position listed below is not with Tennessee Interviews but with Apple , Inc. Tennessee Interviews is a private organization that works in collaboration with Read more
Specialist - Retail Customer Services and Sal...
The position listed below is not with South Carolina Interviews but with Apple , Inc. South Carolina Interviews is a private organization that works in collaboration Read more
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