LaserWriter
The Apple LaserWriter was a pioneering desktop laser printer introduced by Apple Computer in March 1985, featuring a built-in Adobe PostScript interpreter, 300 dpi resolution, and a print speed of 8 pages per minute, powered by a 12 MHz Motorola 68000 processor and a Canon LBP-CX marking engine.[1][2] Priced at $6,995, it was one of the first affordable high-quality laser printers for personal computing environments, enabling professional-grade output that matched what was previously available only through expensive typesetting services.[2][3] Developed as part of Apple's "Macintosh Office" initiative, the LaserWriter integrated seamlessly with the Macintosh ecosystem via AppleTalk networking, allowing multiple computers to share a single printer and facilitating collaborative workflows.[2][4] Its PostScript page description language supported scalable fonts (including Times, Helvetica, Courier, and Symbol stored in ROM) and precise graphics rendering, which was crucial for the emerging field of desktop publishing.[1] The printer's 1.5 MB of RAM and advanced image processing capabilities handled complex documents efficiently, producing "what you see is what you get" (WYSIWYG) results that revolutionized graphic design and document production for businesses and creative professionals.[5][6] By pairing with software like Aldus PageMaker—also released in 1985—the LaserWriter helped launch the desktop publishing industry, democratizing access to high-fidelity printing and significantly boosting the Macintosh's adoption in publishing and office settings.[4][7] Despite its high cost (equivalent to a small car at the time), its institutional appeal and shared-use model made it a cornerstone of early networked computing.[1][3]History
Origins of Laser Printing
The origins of laser printing trace back to the late 1960s at Xerox Corporation, where physicist Gary Starkweather conceived the idea of using a laser to expose images directly onto a xerographic drum, bypassing traditional optical methods.[8] While working at Xerox's Webster Research Center in New York in 1967, Starkweather, then a 29-year-old researcher with a background in optics, proposed modifying existing copiers to incorporate laser technology for digital image reproduction.[9] His insight stemmed from recognizing that a laser beam could precisely "write" computer-generated patterns on the photosensitive surface of a copier drum, enabling high-speed, high-resolution printing without physical originals.[8] Despite initial skepticism from Xerox management, who prioritized conventional photocopier development, Starkweather persisted and built a rudimentary prototype in 1969 by adapting a modified Xerox 914 copier with a helium-neon laser and an acousto-optic modulator to direct the beam. This early system achieved a resolution of approximately 500 dots per inch (dpi) and demonstrated the feasibility of laser-based xerography, though it was limited to simple text and graphics.[10] In 1971, Starkweather transferred to the newly established Xerox Palo Alto Research Center (PARC) in California, where he received greater freedom to refine his invention away from corporate oversight at Webster.[8] At PARC, he developed the Scanning Laser Output Terminal (SLOT), a more advanced prototype based on the Xerox 7000 copier, which used a laser beam to scan digital data across the drum at speeds of up to one page per second. The SLOT system integrated a character generator to convert computer data into laser-modulated pulses, marking a pivotal step toward practical digital printing.[9] By 1972, this setup produced the first computer-generated printed images, including complex graphics, at resolutions around 300-500 dpi, laying the groundwork for networked printing applications.[10] Starkweather's work culminated in U.S. Patent 3,970,359, granted in 1976, which detailed the laser imaging process for xerographic reproduction.[9] The transition from prototype to commercialization accelerated in the mid-1970s, with Xerox evolving the SLOT into the Electronic Printing System (EARS), a networked laser printer capable of handling multiple users. This system influenced the Xerox 9700, the first fully commercial laser printer, released in 1977, which printed at 120 pages per minute on standard paper and became a bestseller, generating billions in revenue for Xerox.[8] Starkweather's innovations not only revolutionized office printing by enabling digital-to-physical output but also paved the way for desktop publishing technologies that would later emerge in products like Apple's LaserWriter.[10]Apple's Development
Apple's development of the LaserWriter began in the early 1980s as part of Steve Jobs' vision to integrate high-quality printing with the Macintosh computer, aiming to enable professional desktop publishing. Jobs encountered Canon's LBP-CX laser printing engine, a compact 300 dots-per-inch unit originally developed for copiers, during the Macintosh project and recognized its potential for affordable laser printing. Apple acquired the first such engines from Canon, connecting one to a Lisa computer for initial page imaging tests before competitors like Hewlett-Packard or Adobe had similar capabilities. This move positioned Apple to pioneer desktop laser printing, with Jobs pushing the project forward despite internal skepticism following the commercial failure of the Lisa.[11] In late 1983, Apple forged a key partnership with Adobe Systems, co-founded by former Xerox researchers John Warnock and Charles Geschke, to license their PostScript page description language for the printer. Adobe had been developing PostScript since 1982 as a device-independent system for describing pages, and Apple invested nearly 20% in the company to secure exclusive rights for its initial implementation. Steve Jobs played a central role in negotiating this deal, viewing PostScript as superior to Apple's internal printing efforts, which were ultimately abandoned in favor of Adobe's technology. The agreement included Apple providing engineering support, such as optimizations by engineer Jerome Coonen to enhance PostScript's performance on the hardware.[12] The engineering team, led by director Robert Belleville, focused on integrating the Canon engine with custom hardware and software. Burrell Smith designed the LaserWriter's digital board to handle the PostScript interpreter and imaging rasterization, incorporating 1.5 MB of RAM to support complex graphics and fonts. The printer also featured Apple's AppleTalk networking protocol from the outset, allowing multiple Macintosh computers to share it, a decision driven by Jobs to emphasize collaborative office use. Development occurred amid broader Macintosh Office initiatives, with the project advancing rapidly to meet Jobs' aggressive timelines.[3][13][12] Challenges included significant internal resistance due to the LaserWriter's high projected price of around $7,000—nearly triple the cost of a Macintosh—and concerns over its viability after the Lisa's poor sales. Despite these hurdles, the team completed the prototype by mid-1984, with software integration finalized for a January 1985 launch. This development not only rescued Apple's printing strategy but also laid the foundation for the desktop publishing revolution when paired with the Macintosh and software like Aldus PageMaker.[11][3]Launch and Market Introduction
The Apple LaserWriter was publicly announced on January 23, 1985, during Apple's annual shareholder meeting in San Francisco, where it was presented as a key component of the company's "Macintosh Office" platform aimed at enhancing productivity in professional environments.[14] This introduction coincided with the debut of Apple's AppleTalk networking protocol, which enabled seamless sharing of the printer among multiple Macintosh computers without requiring dedicated servers.[15] At the event, Apple bundled the LaserWriter with the Macintosh 512K computer and emerging desktop publishing software, positioning it as an affordable entry into high-quality laser printing for creative and business users.[14] Shipping commenced on March 1, 1985, making the LaserWriter one of the first laser printers available to the consumer and professional markets at a price of $6,995—equivalent to roughly $20,000 in today's dollars but significantly lower than competing professional typesetting systems that cost over $100,000.[14][15] Powered by Adobe's PostScript page description language and a Motorola 68000 microprocessor, it delivered 300 dpi resolution at speeds of up to 8 pages per minute, offering professional-grade output for text and graphics that rivaled traditional printing presses.[16][1] The printer's integration with the Macintosh's graphical user interface and software like Aldus PageMaker allowed for what-you-see-is-what-you-get (WYSIWYG) workflows, transforming how documents were created and produced.[16] The market introduction of the LaserWriter ignited the desktop publishing revolution, expanding the Macintosh's appeal beyond hobbyists to graphic designers, publishers, and offices seeking efficient short-run printing without outsourcing to service bureaus.[14] By providing network connectivity via AppleTalk and built-in fonts such as Times, Helvetica, Courier, and Symbol, it supported collaborative environments and reduced dependency on specialized hardware.[15][1] This launch not only boosted Apple's printer sales but also established PostScript as an industry standard, influencing competitors and accelerating the shift toward digital workflows in the publishing sector.[16]Original LaserWriter Design and Features
Hardware Specifications
The original Apple LaserWriter, introduced in 1985, incorporated a Motorola 68000 microprocessor operating at 12 MHz to manage PostScript interpretation and overall printer operations, making it computationally capable for its era.[5] This processor enabled efficient handling of complex graphics and fonts, distinguishing the LaserWriter from dot-matrix printers of the time. The system included 0.5 MB of ROM for firmware and a fixed 1.5 MB of RAM, without user-expandable memory slots, which was sufficient for rendering 300 DPI output from PostScript code.[5] The print engine, based on a Canon LBP-CX technology licensed by Apple, delivered a maximum resolution of 300 dots per inch (DPI) and a print speed of 8 pages per minute for standard letter-sized pages, using electrophotographic laser printing to produce high-quality black-and-white output.[5] It supported both PostScript and Diablo 630 printer description languages for compatibility with various software, with a minimum drum life expectancy of 300,000 pages. Connectivity was provided through a single LocalTalk serial port, allowing networked operation via AppleTalk protocols on Macintosh systems.[5] Physically, the LaserWriter was a desktop unit measuring 11.5 inches in height, 18.5 inches in width, and 16.2 inches in depth, with a weight of 77 pounds, designed for office environments but requiring substantial space due to its integrated laser and toner components.[5] Power requirements included a maximum consumption of 760 watts at 115 volts and 60 Hz, generating up to 2,599.2 BTU per hour in heat output during operation.[5]| Specification | Details |
|---|---|
| Processor | Motorola 68000 at 12 MHz[5] |
| Memory | 0.5 MB ROM; 1.5 MB RAM (fixed)[5] |
| Resolution | 300 DPI[5] |
| Print Speed | 8 pages per minute[5] |
| Interfaces | LocalTalk serial[5] |
| Dimensions | 11.5" H × 18.5" W × 16.2" D[5] |
| Weight | 77 lbs[5] |
| Power | 760 W max, 115 V, 60 Hz[5] |
| Drum Life | Minimum 300,000 pages[5] |
PostScript and Printing Technology
The LaserWriter incorporated Adobe's PostScript as its core page description language, enabling high-quality, device-independent rendering of text, graphics, and images. PostScript, developed by John Warnock and Charles Geschke at Adobe Systems (founded in 1982 after evolving from Xerox PARC projects like Interpress), uses a stack-based, interpretive programming model with postfix notation to describe page content mathematically, supporting scalable outline fonts, transformations, and complex paths without relying on fixed bitmaps.[12] In the original LaserWriter, introduced in January 1985, PostScript was licensed by Apple in 1983 and embedded in 0.5 MB of ROM, allowing the printer to process commands sent from Macintosh applications via AppleTalk or serial connections, such as RS-422 at baud rates of 1200 or 9600.[12] This integration transformed printing from simple raster or dot-matrix outputs into programmable, professional-grade composition, with PostScript version 23.0 handling operations likeshow for text rendering, fill and stroke for paths, and image for bitmaps, all managed through a virtual memory system and graphics state stacks.[17]
The PostScript interpreter in the LaserWriter operated on a dedicated Motorola 68000 microprocessor running at 12 MHz, which executed the language's operators to rasterize page descriptions into a full-page frame buffer at 300 dpi resolution. This process began with receiving PostScript code—structured with a prologue for definitions and a script for page commands—via the AppleTalk Printer Access Protocol (PAP), which supported batch or interactive modes with a 4,096-byte flow quantum. The interpreter converted abstract descriptions (e.g., scalable fonts like Helvetica or Times-Roman via scalefont and setfont) into device-specific bitmaps, applying transformations like scaling, rotation (e.g., 30-degree rotate), and clipping through the current transformation matrix (CTM). Graphics states were preserved using gsave and grestore, ensuring efficient handling of multi-page documents or complex elements like dashed lines and kerning with kshow. Once rasterized, the showpage operator triggered output, with persistent settings stored in EEROM for parameters like margins.[17] This on-board processing offloaded computation from the host Macintosh, enabling WYSIWYG previews to match final prints precisely.[12]
The LaserWriter's printing technology relied on the Canon LBP-CX electrophotographic engine, which produced output at 8 pages per minute with a rated life of 300,000 pages. In this process, the rasterized bitmap from the PostScript interpreter modulated a laser beam to expose a photosensitive drum, selectively discharging areas to attract toner particles via electrostatic charges. The toner image was then transferred to paper, fused by heat and pressure, and ejected, yielding sharp, 300 dpi results on standard letter, legal, or note sizes (imageable areas of 8.0 x 10.5 inches for letter, for example). The engine included safety features like interlocks on the laser assembly and indicators for status (e.g., ready, paper empty, jam), with manual feed options timed at 60 seconds. This combination of PostScript's vector-based precision and the laser engine's high-speed raster imaging established a benchmark for desktop printing, supporting scalable typography and graphics without degradation at different sizes.[17]
Networking and Connectivity
The original Apple LaserWriter, introduced in 1985, pioneered integrated networking for personal computing peripherals through its built-in support for LocalTalk, the physical layer implementation of Apple's AppleTalk protocol suite. This allowed the printer to connect seamlessly to Macintosh systems via a low-cost, twisted-pair cabling system that operated at a speed of 230.4 kbps, enabling efficient transmission of PostScript code without overburdening connected computers.[18] The design emphasized simplicity and affordability, using daisy-chain topology to link up to 32 devices, such as multiple Macs, on a single network segment, which was revolutionary for office environments at the time.[2] Connectivity was facilitated by a dedicated LocalTalk serial port using a Mini-DIN-8 connector, which served as the primary interface for networked printing. Users could select the LaserWriter from the Macintosh Chooser utility to send jobs over the AppleTalk network, allowing shared access among workstations without dedicated file servers in early setups.[5] Additionally, the printer included an RS-232 serial port (DB-25 connector) for direct, point-to-point connections to a single Macintosh or compatible device, supporting asynchronous communication at speeds up to 19.2 kbps for non-networked scenarios.[4] This dual-port approach balanced networked collaboration with straightforward local printing, contributing to the LaserWriter's role in the "Macintosh Office" initiative. The networking architecture prioritized reliability over high bandwidth, as the LaserWriter's onboard Motorola 68000 processor and 1.5 MB of RAM handled PostScript interpretation independently, minimizing latency even on the modest LocalTalk speeds. Up to 30-40 Macintosh computers could share one LaserWriter effectively, fostering desktop publishing workflows by distributing the high cost of laser printing across teams.[2] AppleTalk's Name Binding Protocol further simplified device discovery and job queuing, ensuring stable connectivity in peer-to-peer environments without complex configuration.[18]Evolution of the LaserWriter Line
LaserWriter Plus and SC Models
The LaserWriter Plus, released in January 1986, served as an enhanced successor to Apple's original LaserWriter, addressing limitations in font support and Macintosh integration while maintaining the core printing capabilities. It doubled the ROM capacity to 1 MB from the original's 0.5 MB, enabling the inclusion of 35 built-in PostScript Type 1 fonts—up from 13—such as ITC Avant Garde, ITC Bookman, Courier, Helvetica, and Palatino, which facilitated better typographic variety for desktop publishing tasks.[19][20] A key advancement was its support for downloadable fonts and screen font matching, allowing users to transfer custom fonts from Macintosh systems via the LaserPrep utility, thus improving WYSIWYG (what you see is what you get) accuracy between screen display and printed output.[20] Hardware specifications remained similar to the original, including a 12 MHz Motorola 68000 processor, 1.5 MB RAM (non-expandable), 300 dpi resolution, and an 8 pages-per-minute print speed powered by the Canon LBP-CX engine with a minimum life of 300,000 pages.[19] Connectivity options included LocalTalk for networking and a serial port, with power consumption up to 760 watts and dimensions of 11.5 x 18.5 x 16.2 inches, weighing 77 pounds.[19] Priced at approximately $6,798 upon launch, it was discontinued in February 1988 as the LaserWriter II series emerged.[19] The SC models, exemplified by the LaserWriter II SC introduced in January 1988, represented Apple's push toward more affordable laser printing by shifting from full PostScript interpretation to the lighter QuickDraw imaging model, targeting individual users and small offices.[21] This change eliminated the resource-intensive PostScript Level 1 interpreter, reducing manufacturing costs while preserving essential performance metrics: 300 dpi resolution and 8 pages-per-minute speed via the Canon LBP-SX print engine.[21] The LaserWriter II SC featured a 7.5 MHz Motorola 68000 processor, 1 MB RAM (fixed, non-expandable), and relied on SCSI connectivity without built-in LocalTalk networking, limiting it to direct single-user connections but simplifying setup for non-networked environments.[22][21] It supported 11 built-in screen fonts optimized for QuickDraw, with dimensions of 8.7 x 20.2 x 18.7 inches and a weight of 45 pounds, consuming up to 900 watts.[23] Launched at around $2,999 to undercut PostScript-equipped siblings like the LaserWriter II NT, the II SC appealed to budget-conscious users but sacrificed advanced typographic control and scalability.[24] Later iterations, such as the Personal LaserWriter SC in June 1990, further refined this approach with a slower 4 pages-per-minute speed and Canon LBP-LX engine for even lower pricing at $2,799, emphasizing personal use with 1 MB RAM and SCSI connectivity, though still QuickDraw-based. These models were discontinued by September 1993 as Apple transitioned to more advanced Personal LaserWriter variants.[25]LaserWriter II Series
The LaserWriter II series, introduced by Apple in January 1988, represented a significant evolution in the company's laser printer lineup, offering a range of models designed to balance cost, performance, and compatibility for professional and business users. These printers built upon the original LaserWriter's PostScript foundation but introduced variations in processing power, memory, and printing languages to address diverse needs, from entry-level QuickDraw-based printing to advanced PostScript capabilities with expanded storage options. The series shared a common Canon LBP-SX print engine, enabling consistent 300 dpi resolution and 8 pages-per-minute output across models, while reducing manufacturing costs through modular designs.[24][26] All LaserWriter II models measured 8.7 inches high by 20.2 inches wide by 18.7 inches deep and weighed 45 pounds, with a maximum power draw of 900 watts (7.5 amps at 90-126 volts, 50-60 Hz), generating up to 3,078 BTU per hour. They supported a minimum print life of 300,000 pages and used the same M6000 model designation internally. Connectivity varied by model, typically including LocalTalk for AppleTalk networking and RS-232/RS-422 serial ports, with some adding SCSI or Ethernet for enhanced integration. The series emphasized reliability and scalability, allowing users to upgrade memory in higher-end variants to handle complex graphics and fonts more efficiently.[22][27][28][29][30] The initial trio of models launched in 1988 catered to different market segments. The entry-level LaserWriter IISC featured a Motorola 68000 processor at 7.45 MHz, 1 MB of fixed RAM (non-expandable), and 16 KB ROM, relying on Apple's QuickDraw language for faster, lower-cost printing without full PostScript support, making it suitable for basic Macintosh output. The mid-range LaserWriter IINT upgraded to an 11.5 MHz 68000 processor, 2 MB fixed RAM, and 1 MB ROM, incorporating PostScript and Diablo 630 emulation for broader compatibility with non-Mac systems. The high-end LaserWriter IINTX employed a more powerful 68020 processor at 16.67 MHz, expandable RAM from 2 MB to 12 MB via 12 slots (using 0.25 MB or 1 MB modules at 120 ns), and 1 MB ROM, with added SCSI connectivity for external hard drives to store fonts and improve performance on large jobs.[22][27][28][24] In October 1991, Apple refreshed the series with the LaserWriter IIf and IIg, incorporating newer processors and advanced features to extend relevance amid growing demands for faster rendering and network integration. The IIf used a 20 MHz 68030 processor, 2 MB ROM, and expandable RAM from 2 MB to 32 MB via eight 30-pin slots (0.25, 1, or 4 MB modules at 80 ns minimum speed), supporting PostScript Level 2 and PCL 4+ for improved color handling and efficiency. The IIg further enhanced this with a 25 MHz 68030 processor, 2 MB ROM, and RAM expandable from 5 MB to 32 MB (same slot configuration), adding built-in Ethernet alongside LocalTalk and serial ports, which facilitated direct connection to TCP/IP networks without additional hardware. These later models discontinued in 1993, marking the series' transition toward higher-resolution successors like the LaserWriter Pro line.[29][30]| Model | Release Date | Processor | RAM (Min-Max) | Key Languages/Emulations | Connectivity Additions |
|---|---|---|---|---|---|
| IISC | Jan 1988 | 68000 @ 7.45 MHz | 1 MB (fixed) | QuickDraw | SCSI |
| IINT | Jan 1988 | 68000 @ 11.5 MHz | 2 MB (fixed) | PostScript, Diablo 630 | None |
| IINTX | Jan 1988 | 68020 @ 16.67 MHz | 2-12 MB | PostScript, Diablo 630, HP LaserJet | SCSI |
| IIf | Oct 1991 | 68030 @ 20 MHz | 2-32 MB | PostScript Level 2, PCL 4+ | None |
| IIg | Oct 1991 | 68030 @ 25 MHz | 5-32 MB | PostScript Level 2, PCL 4+ | Ethernet |