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

Apple Remote Desktop 3.9 - Remotely cont...
Apple Remote Desktop is the best way to manage the Mac computers on your network. Distribute software, provide real-time online help to end users, create detailed software and hardware reports, and... Read more
SoftRAID 5.5.6 - High-quality RAID manag...
SoftRAID allows you to create and manage disk arrays to increase performance and reliability. SoftRAID allows the user to create and manage RAID 4 and 5 volumes, RAID 1+0, and RAID 1 (Mirror) and... Read more
Apple Final Cut Pro X 10.3.2 - Professio...
Apple Final Cut Pro X is a professional video editing solution.Completely redesigned from the ground up, Final Cut Pro adds extraordinary speed, quality, and flexibility to every part of the post-... Read more
Logic Pro X 10.3.1 - Music creation and...
Logic Pro X is the most advanced version of Logic ever. Sophisticated new tools for professional songwriting, editing, and mixing are built around a modern interface that's designed to get creative... Read more
Paragraphs 1.1.4 - Writing tool just for...
Paragraphs is an app just for writers. It was built for one thing and one thing only: writing. It gives you everything you need to create brilliant prose and does away with the rest. Features... Read more
VueScan 9.5.70 - 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
TextSoap 8.3.2 - Automate tedious text d...
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
ForkLift 3.0 - Powerful file manager: FT...
ForkLift is a powerful file manager and ferociously fast FTP client clothed in a clean and versatile UI that offers the combination of absolute simplicity and raw power expected from a well-executed... Read more
Amazon Chime 4.0.5528 - Amazon-based com...
Amazon Chime is a communications service that transforms online meetings with a secure, easy-to-use application that you can trust. Amazon Chime works seamlessly across your devices so that you can... Read more
Sparkle 2.1.0 - $79.99
Sparkle will change your mind if you thought building websites wasn't for you. Sparkle is the intuitive site builder that lets you create sites for your online portfolio, team or band pages, or... Read more

Blasty Bubs is a colorful Pinball and Br...
QuickByte Games has another arcade treat in the works -- this time it's a mishmash of brick breaking and Pinball mechanics. It's called Blasty Bubs, and it's a top down brickbreaker that has you slinging balls around a board. [Read more] | Read more »
Corsola and Heracross are the new region...
Generation 2 finally launched in Pokémon GO, unleashing a brand new batch of Pokémon into the wild. Even before the update went live people were speculating on how to catch elusive Pokémon like the legendary "dogs", Unknown, and whether or not... | Read more »
The Warlock of Firetop Mountain (Games)
The Warlock of Firetop Mountain 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: An epic adventure through a mysterious mountain filled with monsters, magic and mayhem! “...it looks downright... | Read more »
Fantasy MMORPG MU Origin’s receives a hu...
Developer Webzen are looking to take their highly popular fantasy battler MU Origin to the next level this month, with its most ambitious overhaul yet. The latest update introduces the long sought after Server Arena, new treasure dungeons, and much... | Read more »
RPG Djinn Caster (Games)
RPG Djinn Caster 1.0.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0.0 (iTunes) Description: SPECIAL PRICE 38% OFF(USD 7.99 -> USD 4.99)!!!A Fantasy Action RPG of far foreign lands! Summon the Djinns and rise to... | Read more »
Alto's Odyssey gets its first trail...
There's finally video evidence of Alto's Odyssey, the follow up to the 2015 App Store hit, Alto's Adventure. It looks just as soothing and atmospheric as Alto's last outing, but this time players will be journeying to the desert. Whereas Alto's... | Read more »
Last week on Pocket Gamer
What’s going on in the wider world of portable gaming? Each week we ask that question of our sister website Pocket Gamer. The PG team covers iOS gaming, just like 148Apps, but it also strays into the world of Android games and handheld consoles... | Read more »
Pokémon GO Generation 2 evolution guide
At long last, Niantic Labs finally unleashed the Generation 2 Pokémon into the wild. Pokémon GO trainers are scrambling to grab up this new set of 80 Pokémon. There are some special new tricks required to catch all of these new beasties, though.... | Read more »
The best new games we played this week
It feels as though the New Year got off to a creaking start as far as mobile games go, but that's changed over the past few weeks. The last few days alone have seen the debut of a number of wonderful games, so we thought we'd take the time to... | Read more »
Recruit more scallywags and discover new...
Get ready to show off your sea legs all over again in Oceans & Empires’ new grand update, which aims to make the act of rising to the role of seven seas ruler even more fresh and appealing, thanks to a richness of new content on both iOS and... | Read more »

Price Scanner via MacPrices.net

Apple restocks refurbished 2015 and 2016 13-i...
Apple has Certified Refurbished 2015 and 2016 13″ MacBook Airs available starting at $759. An Apple one-year warranty is included with each MacBook, and shipping is free: - 2016 13″ 1.6GHz/8GB/128GB... Read more
13-inch 2.5GHz MacBook Pro (Apple refurbished...
Apple has Certified Refurbished 13″ 2.5GHz MacBook Pros (MD101LL/A) available for $829, or $270 off original MSRP. Apple’s one-year warranty is standard, and shipping is free: - 13″ 2.5GHz MacBook... Read more
QuickerTek Announces 5TB Apple AC AirPort Tim...
QuickerTek Inc. has announced their new 5TB hard drive upgrade for Apple’s AC AirPort Time Capsule. By customer request, this upgrade also features six external antennas and offers the highest... 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
Apple offering Certified Refurbished Series 1...
Apple is now offering Certified Refurbished Series 1 and Series 2 Apple Watches for 14-16% off MSRP, starting at $229. An Apple one-year warranty is included with each watch. Shipping is free: Series... Read more
1.4GHz Mac mini on sale for $449, save $50
B&H Photo has the 1.4GHz Mac mini on sale for $50 off MSRP including free shipping plus NY sales tax only: - 1.4GHz Mac mini: $449 $50 off MSRP Read more
12-inch Retina MacBooks on sale for $200-$250...
Newegg has the 12″ 1.2GHz Space Gray Retina MacBook (sku MLH82LL/A) on sale for $1349.99 including free shipping. Their price is $250 off MSRP, and it’s the lowest price available for this model.... Read more
13-inch 2.0GHz Space Gray MacBook Pro on sale...
Adorama has the non-Touch Bar 13″ 2.0GHz Space Gray MacBook Pro in stock today for $100 off MSRP. Shipping is free, and Adorama charges NY & NJ sales tax only: - 13″ 2.0GHz MacBook Pro Space Gray... Read more
13-inch Touch Bar MacBook Pros on sale for $1...
B&H Photo has select 2016 Apple 13″ Touch Bar MacBook Pros in stock today and up to $100 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.9GHz/512GB Touch Bar MacBook... Read more
KSI-1802R SX Disinfect-able Keyboard With Wav...
KSI has unveiled a new, innovative medical keyboard, the KSI-1802R SX, at HIMSS 2017, running February 19-22 in Orlando, Florida. KSI-1802R SX is the only keyboard that combines dual factor... 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
Manager *Apple* Systems Administration - Pu...
Req ID 3315BR Position Title Manager, Apple Systems Administration Job Description The Manager of Apple Systems Administration oversees the administration and 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
Manager *Apple* Systems Administration - Pu...
Req ID 3315BR Position Title Manager, Apple Systems Administration Job Description The Manager of Apple Systems Administration oversees the administration and Read more
*Apple* Technician - nfrastructure (United S...
Let’s Work Together Apple Technician This position is based in Portland, ME Life at nfrastructure At nfrastructure, we understand that our success results from our Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.