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Technical Notes: Legacy Technologies
As Apple hardware devices evolve, the technologies they encompass change to meet the needs of developers and users. As part of this evolution, less efficient features, interfaces, and programming techniques are deprecated or retired in favor of newer ones. Apple makes these changes only when deemed absolutely necessary. A technology identified in the ADC Reference Library as deprecated has been superseded and may become unsupported in the future. A technology identified as unsupported is no longer available from Apple for use by developers. Legacy documents help developers understand legacy technologies, identify replacements, and update their products to operate with current Apple platforms.
View all Hardware Technical Notes.
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Legacy Status		 Sort by
Date
+5 Volt Trickle (HTML) (PDF)
HW21.
 Unsupported 1993-04-01
8*24 GC QuickDraw and Deaccelerated CopyBits (HTML) (PDF)
QD16.
 Unsupported 1991-02-01
_AddDrive, _DrvrInstall, and _DrvrRemove (HTML) (PDF)
DV02.
 Unsupported 1987-03-01
A/ROSE & MCP Card Q&As (HTML) (PDF)
PT505.
 Unsupported 1990-10-01
Absolute Pointing Device Memory Structure (HTML) (PDF)
DV01.
 Unsupported 1990-02-01
ADB - The Untold Story: Space Aliens Ate My Mouse (HTML) (PDF)
HW01.
 Unsupported 2000-08-14
ADBReInit on the SE with System 4.1: Don't Call It (HTML) (PDF)
HW02.
 Unsupported 1987-07-01
Apple Desktop Bus Q&As (HTML) (PDF)
HW505.
 Unsupported 1990-10-01
AppleVision Technote (HTML) (PDF) ()
TN1105.
 Unsupported 1997-12-01
Boot Blocks (HTML) (PDF)
DV03: Warns that Boot Block form and function will change and describes undocumented Boot Blocks features.
 Deprecated 1987-03-01
Break/CTS Device Driver Event Structure (HTML) (PDF)
HW04.
 Unsupported 1986-12-01
Bus Error Handlers (HTML) (PDF)
DV04.
 Unsupported 1991-02-01
Byte Smear(ing) Tactics (HTML) (PDF)
HW05.
 Unsupported 1990-08-01
Cache As Cache Can (HTML) (PDF)
HW06.
 Unsupported 1989-10-01
CD-ROM Driver Calls (HTML) (PDF)
DV22: Discusses public interface to Apple CD-ROM driver and supersedes information in AppleCD SC Developer's Guide.
 Deprecated 2000-08-14
CD-ROM Notes (Most Excellent) (HTML) (PDF)
DV18.
 Unsupported 1991-02-01
CD-ROM Q&As (HTML) (PDF)
DV505.
 Unsupported 1990-10-01
CMOS On Macintosh LC PDS (HTML) (PDF)
HW07.
 Unsupported 1991-02-01
Color Monitor Connections (HTML) (PDF)
HW08.
 Unsupported 1987-07-01
Communications Toolbox Overview Q&As (HTML) (PDF)
CM505.
 Unsupported 1990-10-01
Composite SIMMs Not Supported (HTML) (PDF)
HW33.
 Unsupported 1993-06-01
Connection Manager Q&As (HTML) (PDF)
CM510.
 Unsupported 1990-10-01
Cooperating with the Coprocessor (HTML) (PDF)
HW22.
 Unsupported 1989-06-01
Device Management Overview Q&As (HTML) (PDF)
DV520.
 Unsupported 1990-10-01
Device Manager Q&As (HTML) (PDF)
DV515.
 Unsupported 1990-10-01
Docking Manager Q&As (HTML) (PDF)
DV526.
 Unsupported 1993-05-01
Driver Education (HTML) (PDF)
DV23.
 Unsupported 1990-08-01
Drivers & DAs in Need of (a Good) Time (HTML) (PDF)
DV19.
 Unsupported 1989-08-01
Fear No SCSI (HTML) (PDF)
DV24.
 Unsupported 1992-09-01
Finders and Foreign Drives (HTML) (PDF)
TB10.
 Unsupported 1984-05-01
Finding Drivers in the Unit Table (HTML) (PDF)
DV06.
 Unsupported 1986-02-01
Fixed CLUT Devices and the Single Techno Nerd (HTML) (PDF)
QD19.
 Unsupported 1992-12-01
Floppy Disk Interface Q&As (HTML) (PDF)
HW510.
 Unsupported 1990-10-01
Forcing Floppy Disk Size to be Either 400K or 800K (HTML) (PDF)
DV07.
 Unsupported 1986-02-01
FPU Operations on Macintosh Quadra Computers (HTML) (PDF)
HW23.
 Unsupported 1992-06-01
Graphics Devices Manager Q&As (HTML) (PDF)
DV530.
 Unsupported 1990-10-01
Hard Disk Hacking (HTML) (PDF)
DV08.
 Unsupported 1987-09-01
HFS Tidbits (HTML)
FL07.
 Unsupported 1995-11-01
High-Level Control and Status Calls: When a Good Call Goes Bad (HTML) (PDF)
DV09.
 Unsupported 1990-02-01
ImageWriter II Paper Motion (HTML) (PDF)
PR17.
 Unsupported 1986-04-01
Keyboard Resource Q&As (HTML) (PDF)
TE515.
 Unsupported 1990-10-01
Large-Screen Display Compatibility (HTML) (PDF)
OV07.
 Unsupported 1986-11-01
LaserWriter 8.5.1: The Extended 'PAPA' Resource (HTML) (PDF) ()
TN1115.
 Unsupported 2000-08-14
LaserWriter ROMs Bugs (HTML) (PDF)
PR05.
 Unsupported 1987-05-01
Little PowerBook in Slumberland (HTML) (PDF)
HW24.
 Unsupported 1992-10-01
Macintosh 21" Color Display Technical Specifications (HTML) (PDF)
HW27.
 Unsupported 1992-10-01
Macintosh IIfx: The Inside Story (HTML) (PDF)
HW09.
 Unsupported 1990-04-01
Macintosh Memory Configurations (HTML) (PDF)
HW25.
 Unsupported 1987-11-01
Macintosh Plus Pinouts (HTML) (PDF)
HW10.
 Unsupported 1986-01-01
Macintosh Plus ROM Versions (HTML) (PDF)
HW11.
 Unsupported 1987-07-01
Macintosh Portable PDS Development (HTML) (PDF)
HW12.
 Unsupported 1989-10-01
Macintosh Portable ROM Expansion (HTML) (PDF)
HW13.
 Unsupported 1989-10-01
Macintosh Quadra Built-In Video (HTML) (PDF)
HW26.
 Unsupported 1991-11-01
Macintosh SE/30 Info (HTML) (PDF)
HW14.
 Unsupported 1989-04-01
Memory Hardware Q&As (HTML) (PDF)
HW515.
 Unsupported 1990-10-01
Memory Management Overview Q&As (HTML) (PDF)
ME510.
 Unsupported 1990-10-01
MicroBug: The ROM Debugger (HTML) (PDF) ()
TN1136.
 Unsupported 2000-08-14
Miscellaneous Tool Q&As (HTML) (PDF)
PT540.
 Unsupported 1990-10-01
Monitor Depth : Gimmie Depth Or Gimmie Death (HTML) (PDF)
DV10.
 Unsupported 1990-04-01
The Monster Disk Driver Technote (HTML) (PDF)
TN1189.
 Unsupported 1999-11-01
MoveHHi and SetResPurge (HTML) (PDF)
ME05.
 Unsupported 1987-03-01
NuBus Block Transfer Mode sResource Entries (HTML) (PDF)
HW15.
 Unsupported 1991-02-01
NuBus Expansion Interface Q&As (HTML) (PDF)
HW520.
 Unsupported 1990-10-01
NuBus Interrupt Latency (I Was a Teenage DMA Junkie) (HTML) (PDF)
HW16.
 Unsupported 1988-12-01
NuBus Physical Designs - Beware (HTML) (PDF)
HW17.
 Unsupported 1989-06-01
NuBus Power Allocation (HTML) (PDF)
HW18.
 Unsupported 1989-10-01
On Power Macintosh Interrupt Management (HTML) (PDF)
TN1001.
 Unsupported 1995-10-01
Opening the Serial Driver (HTML) (PDF)
DV11.
 Unsupported 1989-08-01
Our Checksum Bounced (HTML) (PDF)
DV12.
 Unsupported 2000-08-14
PDS Expansion Interface Q&As (HTML) (PDF)
HW525.
 Unsupported 1990-10-01
Pinouts (HTML) (PDF)
HW19.
 Unsupported 1985-04-01
Power Management & PC Card Manager 3.0 (HTML) (PDF) ()
TN1099.
 Unsupported 1997-07-01
Power Management & Servers: Auto Restart From Power Failure (HTML) (PDF)
TN1079.
 Unsupported 1996-11-01
Power Management & The Energy Saver API (HTML) (PDF) ()
TN1086.
 Unsupported 1996-12-01
Power Manager Q&As (HTML) (PDF)
DV545.
 Unsupported 1990-10-01
Power Supply Q&As (HTML) (PDF)
HW530.
 Unsupported 1990-10-01
PowerBook Miscellanea (Cold Serial in the Morning) (HTML) (PDF)
HW28.
 Unsupported 1992-10-01
PowerPC Compatibility and Performance Issues (HTML) (PDF)
PT38.
 Unsupported 2000-08-14
Processors & General Logic Q&As (HTML) (PDF)
HW535.
 Unsupported 1990-10-01
'pslt' resource - What Is It? (HTML) (PDF)
HW29.
 Unsupported 1992-01-01
Register A5 Within GrowZone Functions (HTML)
ME01.
 Unsupported 1995-11-01
SCSI Bugs (HTML) (PDF)
DV14.
 Unsupported 1987-07-01
SCSI Manager Q&As (HTML) (PDF)
DV550.
 Unsupported 1990-10-01
SCSI Port Q&As (HTML) (PDF)
HW540.
 Unsupported 1990-10-01
SCSI Termination (HTML) (PDF)
DV15.
 Unsupported 1990-04-01
Sense Lines (HTML) (PDF)
HW30.
 Unsupported 1992-09-01
Serial GPi (General-Purpose Input) (HTML) (PDF)
DV16.
 Unsupported 1991-02-01
Serial I/O Port Q&As (HTML) (PDF)
HW545.
 Unsupported 1990-10-01
Serial PollProc (HTML) (PDF)
DV21.
 Unsupported 1992-06-01
Serial Port Apocrypha (HTML) (PDF) ()
TN1119.
 Unsupported 1998-04-01
SIMMs to DIMMs: Making Sense Out of Memory Expansion for the Power Macintosh (HTML) (PDF)
TN1055.
 Unsupported 1996-07-01
Sleep Queue Tasks (HTML) (PDF)
HW31.
 Unsupported 1993-05-01
Slot Interrupt Prio-Technics (HTML) (PDF)
HW20.
 Unsupported 1989-10-01
Slot Manager Q&As (HTML) (PDF)
DV560.
 Unsupported 1990-10-01
Sony Driver: What Your Sony Drives For You (HTML) (PDF)
DV17.
 Unsupported 1990-04-01
Sound Input Q&As (HTML) (PDF)
TB565.
 Unsupported 1990-10-01
Speedy the Math Coprocessor (HTML) (PDF)
HW32.
 Unsupported 1989-06-01
Strategies for Dealing with Low-Memory Conditions (HTML) (PDF) ()
TN1042.
 Unsupported 1996-05-01
Suppliers for Macintosh II Board Developers (HTML) (PDF)
HW03.
 Unsupported 1987-07-01
System Error 33, "zcbFree has gone negative" (HTML) (PDF)
ME08.
 Unsupported 1987-07-01
Token Ring Q&As (HTML) (PDF)
NW580.
 Unsupported 1990-10-01
Understanding PCI Bus Performance (HTML) (PDF)
TN1008.
 Unsupported 1995-10-01
Understanding the SerialDMA Driver (HTML) (PDF) ()
TN1018.
 Unsupported 2000-08-14
USB Software Locator (HTML)
TN1191.
 Unsupported 2004-07-06
Using a PurgeProc (HTML) (PDF)
ME11.
 Unsupported 1991-08-01
VIA IC Q&As (HTML) (PDF)
HW550.
 Unsupported 1990-10-01
Video Hardware Q&As (HTML) (PDF)
HW555.
 Unsupported 1990-10-01
Writing Custom Hoses for LaserWriter 8.6 (HTML) (PDF) ()
TN1144.
 Unsupported 2000-08-14