Editing Apple Graphics Tablet

{{Infobox computer peripheral
| name         = Apple Graphics Tablet
| image        = [[File:Apple Graphics Tablet 1979.jpg|250px]]
| caption      = Apple Graphics Tablet (1979) with stylus
| manufacturer = Apple Computer, Inc. / Summagraphics
| type         = Graphics digitizer tablet
| release date = 1979 (first version), 1983 (second version)
| discontinued = 1985
| price        = US$650 (1979 retail)
| interface    = Apple II peripheral card slot
| compatible   = Apple II, II Plus, IIe
| dimensions   = 15.5" W × 15.75" D × 0.75" H
| weight       = Approximately 3 lbs
| model        = A2M0029
}}

The '''Apple Graphics Tablet''' was Apple Computer's first graphics digitizer, introduced in 1979 for the Apple II series computers. Manufactured by Summagraphics and rebranded by Apple, it represented one of the earliest consumer-oriented graphics input devices, predating the widespread adoption of the mouse by five years. The tablet was initially pulled from the market due to FCC radio frequency interference violations but was re-released in a revised version in 1983. Despite its innovative technology and association with musician Todd Rundgren's pioneering "Utopia Graphics System" software, the tablet's high price and limited software support prevented widespread adoption.

== Development and Release ==

=== Origins ===

The Apple Graphics Tablet emerged from Apple's early recognition that graphical input would become essential for personal computing. In 1978, Apple began exploring alternatives to keyboard input for graphics creation, leading to a partnership with Summagraphics Corporation, a leader in professional digitizing technology. The device was essentially a rebranded version of Summagraphics' BitPad, modified with Apple branding and bundled software.

The tablet was developed concurrently with Todd Rundgren's involvement with the New York Institute of Technology, a pioneering center for computer graphics research. Rundgren, already famous for the soft-rock hit "I Saw the Light," had become interested in computer graphics and developed the Utopia Graphics System specifically for the Apple Graphics Tablet. This software represented one of the first paint programs designed for artists rather than programmers, offering 94 color options and various brush types.

=== First Release and FCC Issues ===

The original Apple Graphics Tablet launched in 1979 at a retail price of $650 (equivalent to approximately $2,680 in 2024 dollars). The tablet offered remarkable capabilities for its time:
* Resolution of 280 × 192 pixels
* Pressure-sensitive stylus
* Direct coordinate mapping to screen
* Support for tracing physical artwork

However, the first version suffered from a critical flaw: it generated significant radio frequency interference that violated FCC regulations. Since many Apple II computers were connected to television sets rather than dedicated monitors, the interference caused substantial problems for users. The FCC forced Apple to recall and discontinue the product in 1981, effectively killing its market momentum.

=== Second Version (1983) ===

Apple released a revised version of the Graphics Tablet in 1983 with improved shielding to meet FCC requirements. However, by this time, several factors limited its success:
* The KoalaPad had entered the market at a lower price point
* The Apple IIe was becoming the dominant Apple II model
* The Macintosh with its mouse-based interface was in development
* Limited software support beyond the original Utopia Graphics System

The tablet was quietly discontinued in 1985 as Apple shifted focus to the Macintosh platform and mouse-based interfaces.

== Technical Specifications ==

=== Hardware Architecture ===

'''Tablet surface:'''
* Active area: 11" × 11" 
* Technology: Electromagnetic resonance grid
* Resolution: 200 lines per inch
* Accuracy: ±0.01 inches
* Construction: Laminated surface over sensor grid

'''Stylus:'''
* Type: Passive electromagnetic resonance
* Tip: Replaceable plastic tip
* Cable: 5-foot coiled cable
* Button: Single side button for mode switching
* Weight: Approximately 1 oz

'''Interface card:'''
* Slot requirement: Any Apple II peripheral slot (typically slot 4)
* Processor: Dedicated digitizer controller
* Communication: Parallel interface to Apple II bus
* Power: Drawn from Apple II power supply

=== Operating Principles ===

The tablet used electromagnetic resonance technology:
# Grid of wires beneath the tablet surface created electromagnetic field
# Stylus contained resonant circuit that disturbed field when near surface
# Controller detected position by measuring field disturbance
# Coordinates transmitted to Apple II via interface card
# Software interpreted coordinates as drawing commands

'''Sampling rate:''' 100 points per second
'''Modes:''' 
* Point mode: Single coordinate per stylus press
* Stream mode: Continuous coordinate transmission
* Increment mode: Relative position changes

== Software ==

=== Utopia Graphics System ===

Developed by Todd Rundgren and released simultaneously with the tablet, the Utopia Graphics System was revolutionary for its time:

'''Features:'''
* 94 available colors (using Apple II hi-res color artifacting)
* Multiple brush types and sizes
* Pattern fills
* Geometric shape tools
* Animation capabilities
* Save/load functionality

'''System requirements:'''
* Apple II with 48K RAM minimum
* Apple Graphics Tablet
* Color or monochrome monitor
* Disk II floppy drive

=== Other Compatible Software ===

Limited third-party software supported the Apple Graphics Tablet:
* '''Apple Graphics Tablet Software Package:''' Basic drawing utilities
* '''Special Delivery:''' Graphics creation and slide show software
* '''The Complete Graphics System:''' Professional illustration suite
* '''Various CAD packages:''' Limited support in professional applications

== Macintosh-Era Graphics Tablets ==

While Apple never produced a graphics tablet for the Macintosh, numerous third-party manufacturers filled this niche during the ADB era (1987-1999).

=== Major ADB Graphics Tablet Manufacturers ===

==== Wacom ====

Wacom dominated the Macintosh graphics tablet market with several ADB models:

'''ArtPad series:'''
* '''ArtPad:''' Entry-level 4" × 5" tablet
* '''ArtPad II:''' Improved resolution, erasing stylus
* Models: KT-0405-A (ArtPad), KT-0405-R (ArtPad II)
* Resolution: 2540 lpi
* Pressure levels: 256

'''ArtZ series:'''
* '''ArtZ:''' Professional 6" × 8" tablet
* '''ArtZ II:''' Enhanced features, improved driver support
* Model: UD-0608-A
* Resolution: 2540 lpi
* Pressure levels: 256

'''Digitizer II series:'''
* Professional large-format tablets
* Sizes: 12" × 12", 12" × 18", 18" × 25"
* Model: UD-1212-A (12" × 12")
* Used extensively in CAD and professional illustration

'''Technology:'''
* Electromagnetic resonance (EMR)
* Battery-free stylus
* Tilt sensitivity (later models)
* Programmable buttons

==== CalComp ====

CalComp (later GTCO CalComp) produced several ADB tablets:

'''DrawingSlate series:'''
* '''DrawingSlate:''' Consumer 6" × 9" tablet
* '''DrawingSlate II:''' Improved accuracy and features
* Resolution: 1000 lpi
* Compatibility: Full ADB compliance

'''DrawingBoard series:'''
* '''DrawingBoard II:''' Professional 12" × 12" and 12" × 18"
* '''DrawingBoard III:''' Enhanced resolution and accuracy
* Primary market: CAD and technical illustration

'''Wiz tablet:'''
* Entry-level tablet for education market
* Included both stylus and crosshair cursor
* Budget-oriented alternative to Wacom

==== Kurta ====

Kurta Corporation produced high-end digitizers popular with professionals:

'''IS/ADB series:'''
* '''IS/ONE:''' Professional digitizer
* '''IS/THREE:''' Advanced features for CAD
* Sizes: 12" × 12", 12" × 17", 17" × 24"
* Resolution: Up to 2540 lpi
* Unique feature: Compatibility with Apple IIGS via PenWorks NDA

'''XGT series:'''
* Lower-cost alternative to IS series
* Targeted at desktop publishing market
* ADB passthrough port included

==== Summagraphics ====

After the Apple Graphics Tablet partnership, Summagraphics continued producing Mac-compatible tablets:

'''SummaSketch series:'''
* Professional digitizers for technical drawing
* ADB interface added in late 1980s
* Popular with architects and engineers

'''MM series:'''
* '''MM 1201:''' 12" × 12" professional tablet
* '''MM 961:''' 9" × 6" compact tablet
* Included both stylus and 4-button puck

== Technical Architecture (ADB Tablets) ==

=== ADB Protocol Implementation ===

Graphics tablets communicated via Apple Desktop Bus using extended protocols:

'''Device identification:'''
* '''Device type:''' $04 (absolute positioning device)
* '''Handler ID:''' Vendor-specific (Wacom: $3A, CalComp: $3B)
* '''Default address:''' $5
* '''Data rate:''' Up to 4800 baud equivalent

'''Data packet structure:'''
* Byte 0: Status (button state, proximity)
* Bytes 1-2: X coordinate (16-bit)
* Bytes 3-4: Y coordinate (16-bit)
* Byte 5: Pressure (8-bit)
* Byte 6: Tilt/rotation (if supported)

=== Tracking Technologies ===

'''Electromagnetic resonance (Wacom):'''
* Grid of antenna coils in tablet
* Passive LC circuit in stylus
* No battery required in stylus
* Pressure via variable capacitor

'''Electromagnetic induction (CalComp, Kurta):'''
* Active stylus with battery
* Electromagnetic field generation
* Higher power consumption
* More consistent pressure response

'''Capacitive (rare):'''
* Conductive stylus tip
* Limited pressure sensitivity
* Lower resolution
* Budget implementations only

== Driver Software ==

=== System Software Support ===

'''System 6:'''
* Basic tablet support via Mouse control panel
* Third-party drivers required for pressure
* Limited application support

'''System 7:'''
* Improved tablet recognition
* Pressure-sensitive QuickDraw calls
* Better driver architecture

'''Mac OS 8-9:'''
* Native pressure support in many applications
* USB/ADB bridge compatibility
* Carbonized drivers for OS X transition

=== Third-Party Drivers ===

'''Wacom drivers:'''
* Versions 1.0-6.x for Classic Mac OS
* Pressure mapping controls
* Button programmability
* Application-specific settings

'''CalComp TabletWorks:'''
* Universal driver for CalComp tablets
* AutoCAD optimization
* Macro recording capabilities

'''Kurta PenMouse:'''
* Dual mouse/tablet mode
* Gesture recognition
* Template overlay support

== Common Issues and Repairs ==

=== Apple Graphics Tablet (1979) ===

{| class="wikitable" style="width:90%; text-align:center;"
|+'''Common Problems and Solutions'''
! Issue !! Symptoms !! Cause !! Solution
|-
| No response || Stylus movement not detected || Interface card failure || Test card in different slot, check connections
|-
| Erratic cursor || Jumping or stuttering cursor || RF interference || Check grounding, move away from CRT
|-
| Dead zones || Areas where stylus doesn't work || Grid wire break || Professional repair required
|-
| Intermittent operation || Works sporadically || Stylus cable damage || Check cable continuity, replace if needed
|}

=== ADB Graphics Tablets ===

{| class="wikitable" style="width:90%; text-align:center;"
|+'''ADB Tablet Troubleshooting'''
! Problem !! Likely Cause !! Diagnostic Test !! Repair Method
|-
| No detection || ADB chain issue || Test alone on ADB port || Check cable, clean connectors
|-
| No pressure sensitivity || Driver issue || Test in pressure-aware app || Reinstall drivers
|-
| Stylus not working || Dead stylus components || Test with different stylus || Replace stylus or components
|-
| Erratic tracking || Surface contamination || Visual inspection || Clean with isopropyl alcohol
|-
| Dead areas || Antenna grid damage || Map dead zones || Professional repair or replacement
|}

== Maintenance ==

=== Preventive Care ===

'''Regular cleaning:'''
* Wipe tablet surface weekly with microfiber cloth
* Clean stylus tip monthly
* Check cable integrity quarterly
* Protect from direct sunlight

'''Storage:'''
* Store stylus in holder or horizontally
* Keep tablet flat or vertical
* Protect surface from scratches
* Maintain 40-60% humidity

'''Cable management:'''
* Avoid tight coiling
* Prevent kinking at connection points
* Use cable ties for organization
* Regular inspection for damage

=== Calibration ===

'''Apple Graphics Tablet:'''
# Run calibration utility from system disk
# Touch stylus to indicated corners
# Verify tracking across entire surface
# Save calibration to disk

'''ADB tablets:'''
# Open tablet control panel
# Select calibration option
# Follow on-screen prompts
# Test in drawing application

== Stylus Compatibility ==

=== Wacom Pen Compatibility ===

Wacom maintained backwards compatibility across many generations:

'''Compatible series:'''
* UD series pens work with ArtZ tablets
* UP series pens work with ArtPad tablets
* Some Intuos 1 pens work with later ADB tablets
* Penabled PC styluses often compatible

'''Identification:'''
* Model number on pen barrel
* Test in tablet control panel
* Check Wacom compatibility database

=== Replacement Options ===

'''Original replacements:'''
* Wacom UP-401E (ArtPad)
* Wacom UP-801E (ArtZ)
* CalComp styluses (model-specific)
* Kurta pens (not cross-compatible)

'''Modern alternatives:'''
* Some Samsung S-Pen models (Wacom EMR)
* Older ThinkPad tablet pens
* Fujitsu tablet PC styluses
* Check compatibility before purchase

== Modern Usage ==

=== ADB to USB Conversion ===

'''Hardware solutions:'''
* Griffin iMate (discontinued)
* Wombat ADB-USB converter
* Waxbee project (DIY solution)
* Custom Teensy-based converters

'''Compatibility issues:'''
* Limited driver support in modern OS
* No pressure sensitivity in OS X 10.4+
* Basic mouse emulation only
* Latency approximately 10-20ms

=== Emulation and Preservation ===

'''Using with emulators:'''
* Mini vMac: No tablet support
* Basilisk II: Limited ADB emulation
* SheepShaver: Basic tablet recognition
* QEMU: No tablet support

'''Digital preservation:'''
* Document serial numbers
* Photograph all components
* Backup driver software
* Create calibration profiles

== Software Applications ==

=== Graphics Software Supporting Tablets ===

'''For Apple II (Graphics Tablet):'''
* Utopia Graphics System
* Dazzle Draw
* MousePaint (limited support)
* Printographer

'''For Macintosh (ADB tablets):'''
* Adobe Photoshop 2.0-9.0
* Adobe Illustrator 3.0-10.0
* Macromedia FreeHand
* Fractal Design Painter
* CorelDRAW (Mac versions)
* Canvas
* SuperPaint
* MacDraw Pro

=== CAD/Technical Software ===

* AutoCAD for Macintosh
* VectorWorks (MiniCAD)
* ArchiCAD
* Claris CAD
* Dreams CAD

== Cultural Impact ==

=== Apple Graphics Tablet Legacy ===

The Apple Graphics Tablet, despite its commercial failure, established important precedents:
* Demonstrated Apple's early commitment to graphics
* Proved market existed for graphics input devices
* Influenced development of mouse-based interfaces
* Showed importance of FCC compliance in design

The tablet's association with Todd Rundgren brought attention from the music and art communities, establishing a connection between creative professionals and Apple that continues today.

=== Professional Adoption ===

Graphics tablets became essential tools in several industries:

'''Graphic design:'''
* Desktop publishing revolution
* Digital illustration
* Photo retouching
* Logo design

'''Animation:'''
* Disney adopted Wacom tablets for "Beauty and the Beast" (1991)
* Revolutionized 2D animation workflow
* Enabled paperless animation pipeline

'''CAD/Architecture:'''
* Precision input for technical drawing
* Template overlay capabilities
* Reduced repetitive strain injuries

'''Medical imaging:'''
* Radiology annotations
* Surgical planning
* Medical illustration

== Collecting and Values ==

=== Apple Graphics Tablet ===

'''Rarity:''' Very rare, especially first version
'''Condition factors:'''
* Complete with stylus and manual
* Working interface card
* Original software
* FCC-compliant second version more common

'''Typical values (2024):'''
* Complete working system: $800-1500
* Tablet only: $200-400
* Interface card: $100-200
* Original software: $50-100

=== ADB Graphics Tablets ===

'''Collectibility factors:'''
* Wacom tablets most desirable
* Complete systems with software valuable
* Professional large-format tablets sought after
* Working styluses increasingly rare

'''Market values:'''
* Wacom ArtPad II: $50-150
* Wacom ArtZ II: $75-200
* Kurta IS/ADB: $100-300
* CalComp DrawingSlate: $30-80

== See Also ==
* [[Apple Desktop Bus]]
* [[Apple Mouse]]


{{Navbox-AppleVintageAccessories}}


[[Category:Apple Desktop Bus]]
[[Category:Apple Vintage Accessories]]