TweetFollow Us on Twitter

Sep 85 Mousehole
Volume Number:1
Issue Number:10
Column Tag:Mousehole Letters

Mousehole Report, Letters

By Rusty Hodge, Sys Op & Contributing Editor, Mousehole BBS

Program bombs Lisp

MICRO GHOUL

I have been having a problem with a consistent bomb in ExperLisp that I was wondering whether anyone else was having. The following, though a terrible little routine is a perfect way to get to the bomb (which I was finally able to isolate trying to make a nice routine, that a later version of this piece of trash was working towards). Well, enough about that, here it is:

(SETQ MYWIND (NEWGRAFWINDOW '(100 100 300 350)))
(MYWIND 'SETWTITLE "GONNA BOMB!!")
(DEFUN COORDINATES ()
    (GETMOUSE))
(WHILE
    (NOT (BUTTON))
    (MYWIND 'SELECTWINDOW)
    (APPLY
         FILLOVAL '(50 50 (CAR (COORDINATES)) (CADR (COORDINATES)) MYWIND)))

Please excuse any typos or forgotten "(" or ")" or "'", if I forgot them here does not mean that I forgot them in the actual code, more important is the fact that though Lisp tries to give me an error it bombs with the ID #2 everytime. In fact the first time rather than just a bomb it added the desire to have a disk swap (though both disks where in their respective drives!)

Contest Winner

THE CATCHER

The Catcher (alias Steve Yaeger) wins the Mousehole printing contest sponsored by MacTutor, with this assembly entry to mimic the BASIC statement: PRINT "HELLO":END on the Macintosh. Steve wins a check for $50 and a MacTutor thank you. DON L also submitted an excellent answer that we will print next month.

; Print "hello" on the printer.
;       Written by Steve Yaeger
; If the printer is off-line, this will hang the Mac
;       until it is put back on line
; If there is no Printdriver file it just Beeps and exits
;
; The Linker file looks like this
;
;       HELLO.REL
;       ]
;
; These are the Equates Notice that the iPrReset, iPrLineFeed, 
; and  iPrPageEnd are Longwords and not words as in 
; PREQU.TXT from Counsulair.

 XREF START

; These are the PrDrvr constants.
 
iPrDrvrRef  EQU      $FFFD  ; Driver's RefNum = NOT ResID
iPrIOCtl       EQU      5              ; The Raw Byte IO Proc's ctl # 

PrDevCtl       EQU      7               ; The PrDevCtl Proc's ctl  # 

iPrReset       EQU      $00010000  ; The CParam for res
iPrPageEndEQU      $00020000  ; The CParam for end
iPrLineFeed EQU      $00030000   ; The CParam for pap 
lParam1 EQU      0                 ; the three printer parameters
lParam2 EQU      4
lParam3 EQU      8
 
; These are the standard call parameters
csCode  EQU      $1A      ;control dependent command 
csParam EQU      $1C             ;control dependent param.
ioCompletion  EQU     $C         ;pointer to async notifier routine
ioResult         EQU      $10      ;returns operation results
ioFileNameEQU      $12      ;pointer to name of driver
ioRefNum  EQU      $18      ;driver reference #
ioPermssn   EQU      $1B  ;read/write permission

; Traps used in this program
    .TRAP       _InitGraf                    $A86E
    .TRAP       _InitFonts                   $A8FE
    .TRAP       _FlushEvents       $A050
    .TRAP       _InitWindows       $A912
    .TRAP       _InitMenus                   $A930
    .TRAP       _InitDialogs                 $A97B
    .TRAP       _InitCursor                  $A850
    .TRAP       _TEInit                      $A9CC
    .TRAP       _Open                        $A000
    .TRAP       _Control                     $A004
    .TRAP       _SysBeep                     $A9C8
 
START
;Initialize Managers
PEA     -4(A5)            ;Space Created For Quickdraw's Use
_InitGraf                 ;Init Quickdraw
_InitFonts                ;Init the Font Manager
MOVE.L  #$0000FFFF,D0   ;This Mask Is For All Events
_FlushEvents              ;Flush All Of These Events
_InitWindows              ;Init the Window Manager
_InitMenus                ;Init the Menu Manager
CLR.L    -(SP)            ;restart procedure
_InitDialogs              ;Init the Dialog Manager
_InitCursor               ;Init to arrow cursor
_TEInit                   ;Init Text Edit
 
;------- OPEN THE PRINT DRIVER -------
LEA   '.Print',A1    ;Get a Pointer to the Drivers Name
LEA     IOPARMS,A0 ;Get the Parameter base addres
MOVE.L  A1,ioFileName(A0)     ;Store the Drivers Name addr
CLR.B    ioPermssn(A0)    ;fsCurPerm (whatever we got)
_OPEN
 LEA      IOPARMS,A0 ;Get the Parameter base address
 MOVE.W ioResult(A0),D0          ;Check for an error
 CMP.W  #0,D0                    ;is result ok?
 BEQ      @0                       ;Yes skip the error bell
 MOVE.W #30,-(SP)                ;beep length
 _SYSBEEP                          ;beep to indicate error
 BRA      @4

@0
;------ RESET THE PRINTER TO DEFAULTS -------
LEA     IOPARMS,A0               ;Get the Parameter base addr
MOVE.W  #iPrDevCtl,csCode(A0)   ;Set up a control type call
MOVE.L  #iPrReset,csParam+lParam1(A0)   ;only 1 (Reset)
CLR.L   csParam+lParam2(A0)
CLR.L   csParam+lParam3(A0)
_CONTROL
LEA     IOPARMS,A0 ;Get the Parameter base address
MOVE.W  ioResult(A0),D0   ;Check for an error
CMP.W   #0,D0                    ;is result ok?
 BEQ      @1                       ;Yes skip the error bell
 MOVE.W #30,-(SP)                ;beep length
 _SYSBEEP                          ;beep to indicate error
 BRA      @4
 
@1
;------ ACTUALLY PRINT THE WORD HELLO -------
LEATEXT_STRING,A1;Get address of string to pr
LEA     IOPARMS,A0 ;Get the Parameter base addres
MOVE.W  #iPrIOCtl,csCode(A0)  ;Set up a text streaming call
MOVE.L  A1,csParam+lParam1(A0)  ;Parameter one is a            
 ;pointer to the text
MOVE.L  #(TEXT_STRING_END-TEXT_STRING),                        csParam+lParam2(A0)
;Parameter two is the length of the text
CLR.L csParam+lParam3(A0)    ;No third Parameter
_CONTROL
 LEA      IOPARMS,A0         ;Get the Parameter base address
MOVE.W  ioResult(A0),D0   ;Check for an error
CMP.W   #0,D0                    ;is result ok?
BEQ     @2                         ;Yes skip the error bell MOVE.W
 #30,-(SP)                ;beep length
_SYSBEEP                           ;beep to indicate error
 BRA     @4

@2
;------ PRINT A CR+LF JUST FOR THE FUN OF IT --------
LEA   IOPARMS,A0            ;Get the Parameter base addres
MOVE.W  #iPrDevCtl,csCode(A0)   ;Set up a control type call
MOVE.L  #iPrLineFeed,csParam+lParam1(A0) 
 ;only 1? parameter (CR+LF)
CLR.L   csParam+lParam2(A0)     ;Parameter 2 undetermined
CLR.L    csParam+lParam3(A0)
_CONTROL
LEA     IOPARMS,A0         ;Get the Parameter base address
MOVE.W  ioResult(A0),D0          ;Check for an error
CMP.W   #0,D0                    ;is result ok?
BEQ     @3                         ;Yes skip the error bell
MOVE.W  #30,-(SP)                ;beep length
_SYSBEEP                           ;beep to indicate error
BRA     @4

@3
;---- EJECT A PAGE SO THAT WE CAN SEE WHAT HAPPENS
LEA     IOPARMS,A0          ;Get the Parameter base address
MOVE.W  #iPrDevCtl,csCode(A0)   ;Set up a control type call
MOVE.L  #iPrPageEnd,csParam+lParam1(A0) 
 ;only 1 parameter (eject)
CLR.L   csParam+lParam2(A0)
CLR.L   csParam+lParam3(A0)
_CONTROL
LEA     IOPARMS,A0          ;Get the Parameter base address
MOVE.W  ioResult(A0),D0          ;Check for an error
CMP.W   #0,D0                    ;is result ok?
 BEQ.S    @4                       ;Yes skip the error bell
 MOVE.W  #30,-(SP)                 ;beep length
_SYSBEEP                           ;beep to indicate error
@4
 RTS
 ;        Data Structures
TEXT_STRING      DC.B    'HELLO'
TEXT_STRING_END
.ALIGN  2
 
IOPARMS          DCB.L    20,0
; ------------------   end of program -------------------------------

Letters

First off, I want you to know that I really enjoy reading MacTutor, especially the articles on assembly language. Second I want to report a slight error on page 37 of the June issue. In figure 1 of that issue, a Pascal string is shown as 'fName: String[63]' with it's assembly equivalent as 'DCB.B 63,0'. This could be very misleading. A pascal string is always preceded by a one byte length byte. Thus STR[63] is rendered by DCB.B 64,0. Since using this structure as it was shown could cause an odd alignment of the next data structure, watch out for the 'ole length byte. It could be a difficult bug to track down! Thanks again for an interesting and informative publication.

Made my Day with Modula-2

Terri Wiles, President

Compu-Craft

Thank you for "making my day". We have just recieved the back issues we ordered. It is utterly exciting to see so many articles of substance, especially after months of searching through the pages and pages of the fluff of which certain other Mac magazines are comprised. It is particularly encouraging to me to see articles about Modula-2. I certainly want to express my most sincere hope that this will become a regular column, with particular emphasess on the task of interfacing with the Macintosh.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Together 3.4.6 - Store and organize all...
Together helps you organize your Mac, giving you the ability to store, edit and preview your files in a single clean, uncluttered interface. Smart storage. With simple drag-and-drop functionality,... Read more
Monosnap 3.1.0 - Versatile screenshot ut...
Monosnap lets you capture screenshots, share files, and record video and .gifs! Capture: Capture full screen, just part of the screen, or a selected window Make your crop area pixel perfect with... Read more
Cocktail 8.5.1 - General maintenance and...
Cocktail is a general purpose utility for OS X that lets you clean, repair and optimize your Mac. It is a powerful digital toolset that helps hundreds of thousands of Mac users around the world get... Read more
Vienna 3.0.6 :5eaf312: - RSS and Atom ne...
Vienna is a freeware and Open-Source RSS/Atom newsreader with article storage and management via a SQLite database, written in Objective-C and Cocoa, for the OS X operating system. It provides... Read more
Kodi 15.1.rc1 - Powerful media center to...
Kodi (was XBMC) is an award-winning free and open-source (GPL) software media player and entertainment hub that can be installed on Linux, OS X, Windows, iOS, and Android, featuring a 10-foot user... Read more
Bookends 12.5.8 - Reference management a...
Bookends is a full-featured bibliography/reference and information-management system for students and professionals. Access the power of Bookends directly from Mellel, Nisus Writer Pro, or MS Word (... Read more
Chromium 44.0.2403.125 - Fast and stable...
Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all Internet users to experience the web. Version 44.0.2403.125: This release contains a number... Read more
iMazing 1.2.2 - Complete iOS device mana...
iMazing (was DiskAid) is the ultimate iOS device manager with capabilities far beyond what iTunes offers. With iMazing and your iOS device (iPhone, iPad, or iPod), you can: Copy music to and from... Read more
Audio Hijack 3.2.0 - Record and enhance...
Audio Hijack (was Audio Hijack Pro) drastically changes the way you use audio on your computer, giving you the freedom to listen to audio when you want and how you want. Record and enhance any audio... Read more
FontExplorer X Pro 5.0.1 - Font manageme...
FontExplorer X Pro is optimized for professional use; it's the solution that gives you the power you need to manage all your fonts. Now you can more easily manage, activate and organize your... Read more

You'll Want to Keep an Eye Out for...
If you're the kind of person who had fun hunting down and completing all the codex puzzles in Assassin's Creed 2, then are you ever in for a treat. The Guides looks like it's going to be a very robust collection of similarily odd, seemingly... | Read more »
Vivid Games has Announced Real Boxing 2...
The original Real Boxing was a pretty impressive bit of fisticuffs, but if the trailer Vivid Games is showing off for GamesCom is any indication Real Boxing 2 is going to be even better. [Read more] | Read more »
PAC-MAN Championship Edition DX - Tips,...
[Read more] | Read more »
Card King: Dragon Wars - Tips, Tricks an...
[Read more] | Read more »
Pac-Man Championship Edition DX has brou...
Bandai Namco has released Pac-Man Championship Edition DX on iOS and Android, which features the classic arcade gameplay that we've all grown to love. Pac-Man Championship Edition DX can be enjoyed in much shorter bursts than the arcade versions... | Read more »
Cosmonautica (Games)
Cosmonautica 1.1 Device: iOS Universal Category: Games Price: $6.99, Version: 1.1 (iTunes) Description: Cast off! Are you ready for some hilarious adventures in outer space? | Read more »
Rescue humanity from a Demon horde in An...
Angel Stone is Fincon's follow up to the massively successful Hello Hero and is out now on iOS and Android. You play as a member of The Resistance, a group of mighty human warriors who have risen up in defiance of the Demon horde threatening to... | Read more »
Gallery Doctor (Photography)
Gallery Doctor 1.0 Device: iOS iPhone Category: Photography Price: $2.99, Version: 1.0 (iTunes) Description: Free up valuable iCloud and iPhone storage with Gallery Doctor, the only iPhone cleaner that automatically identifies the... | Read more »
You Against Me (Games)
You Against Me 1.0 Device: iOS Universal Category: Games Price: $.99, Version: 1.0 (iTunes) Description: A simple game… You. Me. Claim, steal, lock, score, win! | Read more »
Yep, it's True - Angry Birds 2 is O...
The not exactly rumors were true and the birds are back. Angry Birds 2 has come to the App Store and the world will... well I suppose it'll still be the same, but now we have more bird-flinging options! [Read more] | Read more »

Price Scanner via MacPrices.net

PDF Element Tool Kit For PDF For Windows 10,...
South Surrey, British Columbia based software developer Wondershare has posted an interesting infographic tracking the development of Microsoft’s flagship Windows operating system over the years,... Read more
27-inch 3.5GHz 5K iMac on sale for $81 off MS...
Adorama has the 27″ 3.5GHz 5K iMac on sale for $2218, $81 off MSRP, including a free copy of Apple’s 3-Year AppleCare Protection Plan. Shipping is free, and Adorama charges sales tax in NY & NJ... Read more
Back-to-School with Tablet and Smartphone Acc...
Belkin helps you prepare for the coming school year with a wide variety of the latest mobile and tablet accessories to outfit both grade school and college students. The line-up includes charging... Read more
11-inch MacBook Airs on sale for $100 off MSR...
Best Buy has 11-inch MacBook Airs on sale for $100 off MSRP. Choose free shipping or free local store pickup (if available). Sale prices for online orders only, in-store prices may vary: - 11″ 1.6GHz... Read more
iPad Air 2 on sale for up to $100 off MSRP
Best Buy has iPad Air 2s on sale for up to $100 off MSRP on their online store for a limited time. Choose free shipping or free local store pickup (if available). Sale prices available for online... Read more
Sale! 13-inch MacBook Pros on sale for $100 o...
B&H Photo has 13″ MacBook Pros on sale for $100 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.5GHz/500GB MacBook Pro: $999.99 save $100 - 13″ 2.7GHz/128GB Retina... Read more
Sale! Save $100 on 13-inch MacBook Airs this...
B&H Photo has the 13″ 1.6GHz/128GB MacBook Air on sale for $899.99 including free shipping plus NY tax only. Their price is $100 off MSRP, and it’s the lowest price available for this model.... Read more
Worldwide Tablet Market Decline Continues, Ap...
The worldwide tablet market declined -7.0% year-over-year in the second quarter of 2015 (2Q15) with shipments totaling 44.7 million units according to preliminary data from the International Data... Read more
TP-LINK TL-PA8030P KIT Powerline Featuring Ho...
Consumer and business networking products provider TP-LINK is now shipping its TL-PA8030P KIT AV1200 3-Port Gigabit Passthrough Powerline Starter Kit that expands your home’s network over its... Read more
Apple refurbished iPad Air 2s available for u...
The Apple Store has Apple Certified Refurbished iPad Air 2s available for up to $140 off the price of new models. Apple’s one-year warranty is included with each model, and shipping is free: - 128GB... Read more

Jobs Board

*Apple* Retail - Multiple Positions (US) - A...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
Infrastructure Engineer - *Apple* /Mac - Hil...
Infrastructure Engineer - Apple /Mac Job Code: 1608 # of openings: 1 Description Our fortune 500 client is looking to hire an experienced Infrastructure Engineer to join Read more
Executive Administrative Assistant, *Apple*...
…supporting presentation development for senior leadership. * User experience with Apple hardware and software is preferred. Additional Requirements The following list Read more
*Apple* Bus Company is now hirin - Apple Bus...
Apple Bus Company is now hiring school bus drivers in the Pettis County area. Class B CDL preferred. Free training provided. No nights or weekends required. Flexible Read more
*Apple* Certified Mac Technician - Updated 6...
…and friendly, hands-on technical support to customers troubleshooting and repairing Apple /Mac products with courtesy, speed and skill. Use your problem-solving skills Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.