Macintosh SE is a personal computer designed, manufactured and sold by Apple Computer, Inc. from March 1987 to October 1990. This marked a significant increase in the design of Macintosh Plus and was introduced by Apple at the same time as the Macintosh II.
SE maintains the same Macintosh Compact form factor as the original Macintosh computer that was introduced three years earlier, but with little difference in color and style. The enhanced model, SE/30 was introduced in January 1989; original SE sales resumed, with renewal after in August of that year to include SuperDrive. Macintosh SE is replaced with Macintosh Classic, a very similar model that maintains the central processing unit and the same form factor, but at a lower price point.
Video Macintosh SE
Overview
Macintosh SE was introduced at AppleWorld conference in Los Angeles on March 2, 1987. "SE" stands for "System Expansion". New features that stand out, compared to its predecessor, Macintosh Plus, are:
- First Macintosh compact with internal drive bay for hard disk (initially 20 MB or 40 MB) or second floppy drive.
- The first Macintosh compact featuring expansion slots.
- First Macintosh to support Apple Desktop Bus (ADB), previously only available on Apple IIGS, for keyboard and mouse connections.
- Enhanced SCSI support with faster data throughput and standard 50-pin internal SCSI connector.
- Better reliability and longer life expectancy (15 years of continuous use) due to the addition of a cooling fan.
- Upgrade a video circuit that results in a lower percentage of CPU time spent on screen drawing. In practice this results in a 10-20 percent performance improvement.
- Additional fonts and kerning routines in the Toolbox ROM
- Disk First Aid is included in the system disk
SE and Macintosh II were Apple's first computers since Apple I was sold without a keyboard. Instead, customers are offered Apple's new Apple Keyboard option or Apple Extended Keyboard.
Apple generated ten SEs with a transparent case as a prototype for promotional and employee images. They are very rare and command premium prices for collectors.
Operating system
Macintosh SE shipped with System 4.0 and Finder 5.4; this version is specific to this computer. (The Macintosh II, which was announced at the same time but shipped a month later, including System 4.1 and Finder 5.5.) The README file that came with the installation disc for SE and II was Apple's first place ever to use the term "Macintosh Software System", and after 1998 both versions are retroactively named "Macintosh System Software 2.0.1".
Maps Macintosh SE
Hardware
Processor : Motorola 68000, 8 MHz, with 8-MHz system bus and 16-bit data path
RAM : SE comes with 1 MB of RAM as standard, and can expand to 4 MB. The logic board has four 30-pin SIMM slots; memory should be installed in pairs and should be 150 ns or faster.
Video : There is 256 KB of onboard video memory, allowing 512x384 monochrome resolution. Default screen has a lower resolution.
Storage : SE can hold one or two floppy drives, or floppy drives and hard drives. The after-market bracket is designed to allow the SE to accommodate two floppy drives as well as hard drives, but that's not Apple's supported configuration. In addition, external floppy disk drives can also be connected, making the SE the only Macintosh other than Macintosh Portable and Macintosh II that can support three floppy drives, although increased storage, RAM capacity and internal hard drive optionally make the external drive less than a necessity than its predecessor. Single-floppy SE models also feature a drive-access light in the place where the second floppy drive will reside. Hard-drive equipped models equipped with 20 MB SCSI hard disk.
Battery : Located on the logic board is a 3.6 V lithium battery, which must be present so that the basic settings remain between power cycles. Long-running Macintosh SE machines have been subject to corrosion and battery leakage, resulting in damaged casing and logic boards.
Expansion : The Direct Processor Slot on the logic board allows an expansion card, such as an accelerator, to be installed. SE can be upgraded to 50 MHz and more than 5 MB with MicroMac accelerator. In the past other accelerators were also available such as Sonnet Allegro. Because installing a card is required to open the computer case and expose the user to high voltage from the internal CRT, Apple recommends that only authorized Apple dealers install cards; the case was sealed with an unusual Torx screw.
Improved : After Apple introduced the Macintosh SE/30 in January 1989, the upgrade logic board was sold by Apple dealers as a high cost increase for SE, consisting of new SE/30 motherboards, front and internal chassis to accommodate components enhancement.
Easter Egg : Macintosh SE ROM size increased from 64 KB on the original Mac to 256 KB, allowing development teams to enter hidden Easter Eggs in ROM. By jumping to the address 0x41D89A or reading from the ROM chip, it is possible to display four engineering team images.
Model
Introduced March 2, 1987:
- Macintosh SE
Introduced August 1, 1989:
- Macintosh SE FDHD : Includes a new SuperDrive, floppy disk drive that can handle 1.4 MB High Density (HD) diskettes. FDHD is an acronym for "Floppy Disk High Density"; then some Macintosh SE FDHD is labeled Macintosh SE Superdrive , to match Apple's marketing changes with respect to their new drive. The HD diskette will be the de-facto standard on Macintosh and PC computers ever since. The upgrade kit is sold for genuine Macintosh SE which includes new ROM chips and new disk controller chip, to replace the original.
- Macintosh SE 1/20 : Name of Macintosh SE FDHD with HDD 20 MB when sold in Europe.
- Macintosh SE 1/40 : Name of Macintosh SE FDHD with HDD 40 MB when sold in Europe.
The compact Macintosh model timeline
See also
- Mini vMac
References
External links
- Promotional video Apple Computer, Inc. "Own-a-Mac - The Movie"
- Repair Mac SE & amp; Support Page improve suggestions.
- Mac SE Low End Mac
Source of the article : Wikipedia
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