TweetFollow Us on Twitter

Oct 89 Letters
Volume Number:5
Issue Number:10
Column Tag:Letters

Letters

By David E. Smith, Editor & Publisher, MacTutor

Any sympathetic souls

John Love, III

Springfield, VA

I’m having absolutely NO luck with MACDTS, or anyone else for that matter, trying to solve my following 2 separate & distinct problems. I KNOW this is an AWFUL lot, but I’m going crazy ?!*!?

; 1) Using _CopyBits to create a color PICT2 file:
entireScreenpointer; My globals
screenMap pointer; ...
pictBoundsrect   ; ...
picHdl  handle   ; ...

 clr.w  -(sp)
 bsr  TestForColor
 pop.w  d0
 beq.s  .bitMap
 ; ----------
.pixMap GetCWMgrPort !entireScreen
 move.l entireScreen,a0
 lea  portPixMap(a0),a1
 move.l a1,screenMap
 move.l portPixMap(a0),a1
 move.l (a1),a1  ; Handle -- Pointer.
 bra.s  .setBounds
 ;
.bitMap GetWMgrPort!entireScreen
 move.l entireScreen,a0
 lea  portBits(a0),a1
 move.l a1,.screenMap

 ; ~~~~~~~~~~

.setBoundsmove.l bounds+topLeft(a1),pictBounds+topLeft
 move.l bounds+botRight(a1),pictBounds+botRight
 ; ----------
.setPortSetPort  entireScreen
 ClipRect !pictBounds
 ; etc
 
.macDraw2 OpenPicture!pictBounds,=picHdl

 CopyBits screenMap,screenMap,!pictBounds,!pictBounds,#srcCopy,#0

 ClosePicture
 ; etc
 
; above code works in black-and-white mode, but NOT in color.
;
; I’ve tried : move.lentireScreen,a0
;move.l portPixMap(a0),screenMap
; Also :move.l entireScreen,a0
;move.l portPixMap(a0),a1
;move.l (a1),screenMap
;
; ... but neither permutation works --> an empty picHdl (10 bytes, obviously
; ... corresponding to just the picSize & picFrame fields).
; ... it doesn’t bomb, but the file comes up blank, that is, just
; ... the 512-byte header + those 10 bytes and nothing else.
; ... I think it’s kinda interesting that ONLY upon
;
;move.l portPixMap(a0),screenMap
;
; ... do I get a PICT2 file, albeit an empty one.
; ... In the other two cases, I get just a PICT file.
;
;SIGH !!
; ------------------------------

; 2) Switching color on & off on the fly, that is, changing the MODE:

; following was deduced from the “Cards and Drivers ...” book.
; This book is supposed to be official stuff from Apple, yet
; MacDTS fails to respond in other than purely qualitative prose.
;
; All my code does is turn video to a constant gray all over
; as if I had turned the video OFF.  All further execution ceases !!
; No bomb, but I must re-boot.
 
; My calling stuff:

origModeinteger  ; My globals
paramBlkRec byte ioFQElSize ; ...
VDPgInfobyteVDPageInfo  ; ...

 clr.w  -(sp)
 bsr  TestForColor
 pop.w  d0
 beq.s  .notColor
 
 ; ----------
 ; Save the current mode for reseting when done
 ; and then set to black-and-white:

.itsColor clr.w  -(sp)    ; result = Error code.
 push.l MainDevice
 pea  paramBlkRec; VARed ...
 pea  VDPgInfo
 bsr  GetMode
 lea  VDPgInfo,a1
 move.w csMode(a1),origMode ; ... for reseting later.
 pop.w  d0
 bsr  testError  ; Returns if d0 <> 0.
 ; ----------
 clr.w  -(sp)
 push.l MainDevice
 push.w #oneBitMode; ... for black-and-white.
 bsr  SetDeviceMode
 pop.w  d0
 bsr  testError
 
.notColor
 ; etc
 
.onExitingclr.w  -(sp)
 bsr  TestForColor
 pop.w  d0
 beq.s  .byeBye
 
 ; ----------
 ; Reset the mode to its original value:
 
.resetColor clr.w-(sp)
 push.l MainDevice
 push.w .origMode
 bsr  SetDeviceMode
 pop.w  d0
 bsr  .testError
 
.byeBye
 ; etc

; All my subroutine children:
; ======================================
; FUNCTION  TestForColor : BOOLEAN;
; Test for the presence of a Mac with Color QuickDraw AND a Color
; Monitor that the user has set to Color via the Control Panel
; or by using the “Switch-A-Roo” FKEY:

TestForColorfunc boolean
 noParms
 
 locals
.theWorld byte sysEnv1Size; Mac II stuff.
 endLocals
 
 enter
 
 movem.ld1-d7/a0-a5,-(sp) ; Save all your pennies !!
 ; ==========
 
 clr.w  .result  ; Assume NO color = B&W.
 
 move.w #1,d0    ; Version #1.
 lea  .theWorld,a0
 _SysEnvirons
 tst.w  d0
 bne.s  .notColor
 ; ----------
.noErrortst.b  hasColorQD(a0) ; A0 --> theWorld.
 beq.s  .notColor
 ; ----------
 GetGDevice =a1  ; Handle -->
 move.l (a1),a1  ;   Pointer.
 move.l gdPMap(a1),a0; Ditto ...
 move.l (a0),a0
 cmpi.w #1,pmPixelSize(a0)
 beq.s  .notColor

.color  st.result
 ; ----------
.notColor

 ; ==========
.end  movem.l  (sp)+,d1-d7/a0-a5 ; Withdraw life savings !!
 
 exit

; ======================================
; FUNCTION  WhereIsTheDevice (whatDevice: GDHandle) : dceHandle;
; Slot #, Slot ID, etc ??
WhereIsTheDevice funchandle
.whatDevice handle
 endParms
 
 noLocals
 
.devRefNumrequ d1
 enter
 
 movem.ld1-d7/a0-a5,-(sp) ; Save your goodies !!
 ; ==========
 clr.l  .result  ; Assume nowhere !!
 
 move.l .whatDevice,a0
 move.l (a0),a0  ; Handle --> Pointer.
 move.w gdRefNum(a0),.devRefNum
 ; tst.w.devRefNum
 beq.s  .end; Nowhere !!
 ; ----------
 not.w  .devRefNum ; = Unit #
 lsl.w  #2,.devRefNum; 4 bytes per entry.
 move.l UTableBase,a1; --> DCE Table.
 move.l (a1,.devRefNum),.result  ; = dceHandle.
 
 ; ==========
.end  movem.l  (sp)+,d1-d7/a0-a5 ; Dig up your treasure !!
 exit

; ======================================
; FUNCTION  GetMode (whatDevice: GDHandle; VAR paramBlk: paramBlkRec;
;     VAR VDPgInfo: VDPgInfoRec) : INTEGER;
; csMode, csPage, etc ??

GetMode funcinteger; Error code.
.whatDevice handle
.paramBlk var
.VDPgInfo var
 endParms
 
 noLocals
.paramBlkPtrrequ a0
.dceHandlerequ a1
.dcePtr requa1
 
 enter
 
 movem.ld1-d7/a0-a5,-(sp) ; Save your goodies !!
 ; ==========
 move.w #-1,.result; Assume a problem.
 
 move.l .paramBlk,.paramBlkPtr; A Pointer.
 move.l #ioFQElSize-1,d0
.clearBlk1clr.b  (.paramBlkPtr)+
 dbra d0,.clearblk1
 ; ----------
 move.l .VDPgInfo,a2 ; Another Pointer.
 move.l #VDPageInfo-1,d2
.clearBlk2clr.b  (a2)+
 dbra d2,.clearBlk2
 
 clr.l  -(sp)    ; FUNCTIONal result.
 push.l .whatDevice
 bsr  WhereIsTheDevice
 pop.l  .dceHandle
 cmpi.l #0,.dceHandle
 beq.s  .end; Oh-Oh !!
 move.l (.dceHandle),.dcePtr
 ; ----------
 move.l .paramBlk,.paramBlkPtr; Reset.
 ; clr.lioCompletion(.paramBlkPtr)
 move.w dCtlRefNum(.dcePtr),ioRefNum(.paramBlkPtr)
 ; move.b #fsCurPerm,ioPermssn(.paramBlkPtr)   ; = 0
 ; clr.lioMix(.paramBlkPtr)
 ; clr.wioFlags(.paramBlkPtr)
 move.b dCtlSlot(.dcePtr),ioSlot(.paramBlkPtr)
 move.b dCtlSlotID(.dcePtr),ioID(.paramBlkPtr)
 
 move.w #cscGetMode,csCode(.paramBlkPtr)
 move.l .VDPgInfo,csParam(.paramBlkPtr)      ; VARed.
 _Status,immed
 move.w d0,.result
 ; ==========
.end  movem.l  (sp)+,d1-d7/a0-a5 ; Dig up your treasure !!
 
 exit

; ======================================
; FUNCTION  SetMode (whatDevice: GDHandle; paramBlk: paramBlkPtr;
;     VDPgInfo: VDPgInfoPtr) : INTEGER;
;
; csMode, csPage, etc !!

SetMode funcinteger; Error code.
.whatDevice handle
.paramBlk pointer
.VDPgInfo pointer
 endParms
 
 noLocals
 
.paramBlkPtrrequ a0
.dceHandlerequ a1
.dcePtr requa1
 
 enter
 
 movem.ld1-d7/a0-a5,-(sp)
 ; ==========
 
 clr.l  -(sp)    ; FUNCTIONal result.
 push.l .whatDevice
 bsr  WhereIsTheDevice
 pop.l  .dceHandle
 cmpi.l #0,.dceHandle
 bne.s  .setNewMode; Everything’s cool !!
.itsNowhere move.w #-1,d0
 bra.s  .ohOh
 ; ----------
.setNewMode move.l (.dceHandle),.dcePtr
 move.l .paramBlk,.paramBlkPtr
 move.w #cscSetMode,csCode(.paramBlkPtr)
 move.l .VDPgInfo,csParam(.paramBlkPtr)
 _Control,immed

.ohOh move.wd0,.result    
 ; ==========
.end  movem.l  (sp)+,d1-d7/a0-a5
 
 
 exit

; ======================================
; FUNCTION  SetDeviceMode (whatDevice: GDHandle; mode: INTEGER) : INTEGER;
;
; Set the specified Device to a particular color mode:

SetDeviceMode  funcinteger; Error code.
.whatDevice handle
.mode integer
 endParms
 
 locals
.paramBlkRecbyte ioFQElSize
.VDPgInfo byte VDPageInfo
 endLocals
 
.paramBlkPtrrequ a0
.dceHandlerequ a1
.dcePtr requa1
 enter
 
 movem.ld1-d7/a0-a5,-(sp)
 ; ==========
 
.getOldStuffclr.w-(sp)    ; result = Error code.
 push.l .whatDevice
 pea  .paramBlkRec ; VARed ...
 pea  .VDPgInfo
 bsr  GetMode
 pop.w  d0
 bne.s  .ohOh

.whereInThe?clr.l-(sp)    ; FUNCTIONal result.
 push.l .whatDevice
 bsr  WhereIsTheDevice
 pop.l  .dceHandle
 cmpi.l #0,.dceHandle
 bne.s  .setGray ; Everything’s cool !!
.itsNowhere move.w #-1,d0
 bra.s  .ohOh
 ; ----------
.setGraymove.l (.dceHandle),.dcePtr; Recommended middle step.
 lea  .paramBlkRec,.paramBlkPtr
 move.w #cscGrayPage,csCode(.paramBlkPtr)
 lea  .VDPgInfo,a2
 move.l a2,csParam(.paramBlkPtr)
 _Control,immed
 tst.w  d0
 ; bne.s.ohOh    ; This call is optional.

.setNewMode clr.w-(sp)    ; Error code.
 push.l .whatDevice
 pea  .paramBlkRec
 lea  .VDPgInfo,a1
 move.w .mode,csMode(a1)  ; Change the mode.
 pea  .VDPgInfo
 bsr  SetMode
 pop.w  d0
 
.ohOh move.wd0,.result    
 ; ==========
.end  movem.l  (sp)+,d1-d7/a0-a5
 
 exit

Onstad’s Answer

Flashpoint

San Francisco, CA

Paul Onstad’s question in the August 1989 issue of MacTutor on page 4: you must do a CreateResFile() after the Create to add the resource map data to the resource fork. [Note: you must Create FIRST, CreateResFile SECOND.]

Segmented XCMD Problem Solved

Peter B. Nagel

Denver, CO

With several gentle nudges from various helpful persons on CompuServe, I was able quite successfully to implement a solution in HyperTMON to the segmented XCMD problem that three individuals described in the Mousehole Report column in your August issue.

MPW’s -ss linker option will allow the creation of XCMD segments well in excess of the normal 32k limit on the intra-code segment addresses. Through a judicious resorting of my linked modules, I was able to create XCMDs approaching 38k. To enlarge an XCMD beyond that limit, however, I found that it was necessary, and certainly possible, to segment XCMDs through the use of separate code resources.

To do this, create and link a separate code resource whose entry point jumps to a case statement that branches to the appropriate procedures and functions in the resource. Then define a parameter block with sufficient fields to hold all the possible parameters that could be passed to all the procedures and functions in that code resource. From within the XCMD, then, you can include the following code (minus appropriate error checking) to retrieve the separate code resource, initialize the parameter block, and jump to you external code:

Procedure JumpToNewCode(paramBlkHndl: paramHndl; procAddress: Ptr);
InLine  $205F, { MOVE.L (A7)+, A0; address of procedure}
 $4E90, { JSR (A0); jump to procedure}

Procedure CallNewCode(selector: integer; param1: integer; param2: longint; 
param3: Ptr; Var param4: Handle; Var param5: Boolean);
Var
 paramBlkHndl : paramHndl;
 codeAddr : Handle;
Begin {Procedure CallNewCode}
 codeAddr := GetResource(‘CODE’, 1234);
 MoveHHi(codeAddr);
 HLock(codeAddr);
 paramBlkHndl := NewHandle(sizeof(paramHndl));
 with paramBlkHndl^^ do
 begin
 {fill in parameters}
 end;
 JumpToNewCode(paramBlkHndl, StripAddress(codeAddr^));
 HUnlock(codeAddr);
 HPurge(codeAddr);
 with paramBlkHndl^^ do
 begin
 {return Var values}
 end;
 DisposHandle(paramBlkHndl);
end; {Procedure CallNewCode}

At one time, it appeared that, when memory became really tight, HyperCard may have been unceremoniously disposing of my code resources, and so I ended up calling BlockMove to place them in nonrelocatable blocks, since I needed them around at all times. I am still not sure that it wasn’t my own fault, but I would be interested in knowing if any of your readers have had a similar problem.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Boom 2 1.5.2 - $14.99
Boom 2 is a system-wide volume booster and equalizer app that is designed especially for OS X 10.10 Yosemite. It comes with a smart interface, self-calibrates itself according to your Mac, offers... Read more
MacFamilyTree 8.1.3 - Create and explore...
MacFamilyTree gives genealogy a facelift: modern, interactive, convenient and fast. Explore your family tree and your family history in a way generations of chroniclers before you would have loved.... Read more
WhiteCap 6.6 - Visual plug-in for iTunes...
WhiteCap is a sleek and sophisticated music visualizer and screensaver that features futuristic, wireframe mesh visuals with dynamic backgrounds and colors. WhiteCap contains thousands of visual... Read more
VOX 2.8.14 - Music player that supports...
VOX just sounds better! The beauty is in its simplicity, yet behind the minimal exterior lies a powerful music player with a ton of features and support for all audio formats you should ever need.... Read more
Paparazzi! 1.0b2 - Make user-defined siz...
Paparazzi! is a small utility for OS X that makes screenshots of webpages. This very simple tool takes screenshots of websites which do not fit on one screen. You specify the desired width, minimal... Read more
Carbon Copy Cloner 4.1.13 - Easy-to-use...
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
TrailRunner 3.8.832 - Route planning for...
TrailRunner is the perfect companion for runners, bikers, hikers, and all people wandering under the sky. Plan routes on a geographical map. Import GPS or workout recordings and journalize your... Read more
VueScan 9.5.65 - 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 Illustrator CC 2017 21.0.2 - Profe...
Illustrator CC 2017 is available as part of Adobe Creative Cloud for as little as $19.99/month (or $9.99/month if you're a previous Illustrator customer). Adobe Illustrator CC 2017 is the industry... Read more
iDefrag 5.1.7 - Disk defragmentation and...
iDefrag helps defragment and optimize your disk for improved performance. Features include: Supports HFS and HFS+ (Mac OS Extended). Supports case sensitive and journaled filesystems. Supports... Read more

5 dastardly difficult roguelikes like th...
Edmund McMillen's popular roguelike creation The Binding of Isaac: Rebirth has finally crawled onto mobile devices. It's a grotesque dual-stick shooter that tosses you into an endless, procedurally generated basement as you, the pitiable Isaac,... | Read more »
Last week on PocketGamer
Welcome to a weekly feature looking back on the past seven days of coverage on our sister website, PocketGamer. It’s taken a while for 2017 to really get going, at least when it comes to the world of portable gaming. Thank goodness, then, for... | Read more »
ROME: Total War - Barbarian Invasion set...
To the delight of mobile strategy fans, Feral Interactive released ROME: Total War just a few months ago. Now the game's expansion, Barbarian Invasion is marching onto iPads as a standalone release. [Read more] | Read more »
Yuri (Games)
Yuri 1.0 Device: iOS iPhone Category: Games Price: $3.99, Version: 1.0 (iTunes) Description: It's night. Yuri opens his eyes. He wakes up in a strange forest.The small, courageous explorer rides on his bed on casters in this... | Read more »
Space schmup Xenoraid launches on the Ap...
10Tons Xenoraid is out today on the App Store, bringing some high-speed space action to your mobile gadgets just in time for the weekend. The company's last premium title, another sci-fi game titled Neon Chrome, did quite well for itself, so... | Read more »
Star Wars: Force Arena Beginner's G...
Star Wars: Force Arena joined the populous ranks of Star Wars games on mobile today. It's a two-lane MOBA starring many familiar faces from George Lucas's famed sci-fi franchise. As with most games of this nature, Force Arena can be a little obtuse... | Read more »
Mysterium: The Board Game (Games)
Mysterium: The Board Game 1.0 Device: iOS Universal Category: Games Price: $6.99, Version: 1.0 (iTunes) Description: The official adaptation of the famous board game Mysterium! | Read more »
Sonny (Games)
Sonny 1.0.4 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0.4 (iTunes) Description: Reimagined for iOS, cult-hit RPG Sonny brings challenging turn-based combat that requires strategy and mastery of each new skill to... | Read more »
Towaga (Games)
Towaga 1.0 Device: iOS iPhone Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: "It has been foretold that a masked being would stand atop the legendary Towaga Temple, dwelling among shadows to fulfil The Black Moon... | Read more »
Bubble Witch 3 Saga Guide: How to get th...
King's bringing its fairytale bubble-popping puzzler back for its 3rd outing in Bubble Witch 3 Saga. If you're familiar with the series, not much has changed here on the surface level, though you'll likely be pleased with the improvements. If you'... | Read more »

Price Scanner via MacPrices.net

New MacBooks And MacBook Pros WIth Kaby Lake...
Digitimes’ Joseph Tsai cites a Chinese-language Economic Daily News (EDN) report that unnamed market watchers are predicting Apple MacBook shipments to grow 10 percent in 2017, and projecting 15... Read more
New 2016 13-inch MacBook Pros on sale for up...
B&H Photo has the new 2016 13″ MacBook Pros in stock today and on sale for up to $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.9GHz/512GB Touch Bar MacBook Pro... Read more
New 15-inch Touch Bar MacBook Pros in stock a...
B&H Photo has the new 2016 15″ Apple Touch Bar MacBook Pros in stock today and on sale for up to $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 15″ 2.7GHz Touch Bar... Read more
Opera Announces Neon Concept Browser For Mac
Opera is inviting users to get a glimpse of what Opera for computers could become with its Opera Neon browser concept. Each Opera Neon feature is described as “an alternate reality” for the Opera... Read more
Tellini Releases TabView 3.0 Missing Tool fo...
Tellini has announced the release of TabView 3.0. TabView has been the first macOS viewer for PowerTab tablatures. PowerTab is a well-known and widely adopted tablature editor for Windows systems and... Read more
13-inch 1.6GHz/128GB MacBook Air on sale for...
Overstock.com has the 1.6GHz/128GB 13″ MacBook Air on sale for $130 off MSRP including free shipping: - 13″ 1.6GHz/128GB MacBook Air (MMGF2LL/A): $869.99 $130 off MSRP Their price is the lowest... Read more
12-inch 32GB Space Gray iPad Pro on sale for...
B&H Photo has 12″ Space Gray 32GB WiFi Apple iPad Pros on sale for $55 off MSRP including free shipping. B&H charges sales tax in NY only: - 12″ Space Gray 32GB WiFi iPad Pro: $744.44 $55 off... Read more
9-inch 32GB Space Gray iPad Pro on sale for $...
B&H Photo has the 9.7″ 32GB Space Gray Apple iPad Pro on sale for $549 for a limited time. Shipping is free, and B&H charges NY sales tax only. Read more
Apple iMacs on sale for up to $120 off MSRP,...
B&H Photo has 21″ and 27″ Apple iMacs on sale for up to $120 off MSRP, each including free shipping plus NY sales tax only: - 27″ 3.3GHz iMac 5K: $2199 $100 off MSRP - 27″ 3.2GHz/1TB Fusion iMac... Read more
Apple refurbished Apple TVs available for up...
Apple has Certified Refurbished 32GB and 64GB Apple TVs available for up to $30 off the cost of new models. Apple’s standard one-year warranty is included with each model, and shipping is free: -... Read more

Jobs Board

*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
*Apple* & PC Desktop Support Technician...
Apple & PC Desktop Support Technician job in Stamford, CT We have immediate job openings for several Desktop Support Technicians with one of our most well-known Read more
*Apple* macOS Systems Integration Administra...
…most exceptional support available in the industry. SCI is seeking an Junior Apple macOS systems integration administrator that will be responsible for providing Read more
*Apple* Premier Retailer - Service Technicia...
DescriptionSimply Mac is the largest premier retailer for Apple products and solutions. At Simply Mac we are all Apple , all the time. Same products. Same prices. Read more
*Apple* Premier Retailer - Service Technicia...
DescriptionSimply Mac is the largest premier retailer for Apple products and solutions. At Simply Mac we are all Apple , all the time. Same products. Same prices. Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.