Macintosh Hard Disk 20 Model M0135 For Mac

1. The Macintosh could only support one external drive, limiting the number of floppy disks mounted at once to two, but both Apple and third party manufacturers developed external hard drives that connected to the Mac's floppy disk port, which had pass-through ports to accommodate daisy-chaining the external disk drive. Apple's Hard Disk 20 could.
2. Macintosh Hard Disk 20 model M0135 for Mac 512K or 512KE or Macintosh Plus- Made in USA Works great and has many vintage applications on the drive. This came from the original owner.

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The Macintosh Hard Disk 20 was the first hard drive developed by Apple specifically for use with the Macintosh 512K.Introduced on September 17, 1985, it was part of Apple’s long awaited solution toward completing the Macintosh Office (a suite of integrated business hardware and software) announced in January 1985.

The Macintosh SE is a personal computer designed, manufactured, and sold by Apple Computer, Inc. from March 1987^[1] to October 1990. It marked a significant improvement on the Macintosh Plus design and was introduced by Apple at the same time as the Macintosh II.

The SE retains the same Compact Macintosh form factor as the original Macintosh computer introduced three years earlier and uses the same design language used by the Macintosh II. An enhanced model, the SE/30, was introduced in January 1989; sales of the original SE continued. The Macintosh SE was updated in August 1989 to include a SuperDrive, with this updated version being called the 'Macintosh SE FDHD' and later the 'Macintosh SE SuperDrive'. The Macintosh SE was replaced with the Macintosh Classic, a very similar model which retained the same central processing unit and form factor, but at a lower price point.

Overview[edit]

The Macintosh SE was introduced at the AppleWorld conference in Los Angeles on March 2, 1987. The 'SE' is an acronym for 'System Expansion'.^[2] Its notable new features, compared to its similar predecessor, the Macintosh Plus, were:

• First compact Macintosh with an internal drive bay for a hard disk (originally 20 MB or 40 MB) or a second floppy drive.
• First compact Macintosh that featured an expansion slot.
• First Macintosh to support the Apple Desktop Bus (ADB), previously only available on the Apple IIGS, for keyboard and mouse connections.
• Improved SCSI support with faster data throughput and a standard 50-pin internal SCSI connector.
• Better reliability and longer life expectancy (15 years of continuous use)^[3] due to the addition of a cooling fan.
• Upgraded video circuitry that results in a lower percentage of CPU time being spent drawing the screen. In practice this results in a 10-20 percent performance improvement.^[4]
• Additional fonts and kerning routines in the Toolbox ROM^[3]
• Disk First Aid is included on the system disk

The SE and Macintosh II were the first Apple computers since the Apple I to be sold without a keyboard. Instead the customer was offered the choice of the new ADB Apple Keyboard or the Apple Extended Keyboard.

Macintosh Hard Disk 20 Model M0135 For Mac Os

Apple produced ten SEs with transparent cases as prototypes for promotional shots and employees. They are extremely rare and command a premium price for collectors.^[5]

Operating system[edit]

The Macintosh SE shipped with System 4.0 and Finder 5.4; this version is specific to this computer.^[6] (The Macintosh II, which was announced at the same time but shipped a month later, includes System 4.1 and Finder 5.5.) The README file included with the installation disks for the SE and II is the first place Apple ever used the term 'Macintosh System Software', and after 1998 these two versions were retroactively given the name 'Macintosh System Software 2.0.1'.^[7]

Hardware[edit]

Processor: Motorola 68000, 8 MHz, with an 8 MHz system bus and a 16-bit data path

RAM: The SE came with 1 MB of RAM as standard, and is expandable to 4 MB. The logic board has four 30-pin SIMM slots; memory must be installed in pairs and must be 150 ns or faster.

Video: The built-in 512 × 342 monochrome screen uses 21,888 bytes of main memory as video memory.

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Storage: The SE can accommodate either one or two floppy drives, or a floppy drive and a hard drive. After-market brackets were designed to allow the SE to accommodate two floppy drives as well as a hard drive, however it was not a configuration supported by Apple. In addition an external floppy disk drive may also be connected, making the SE the only Macintosh besides the Macintosh Portable which could support three floppy drives, though its increased storage, RAM capacity and optional internal hard drive rendered the external drives less of a necessity than for its predecessors. Single-floppy SE models also featured a drive-access light in the spot where the second floppy drive would be. Hard-drive equipped models came with a 20 MB SCSI hard disk.

Battery: Soldered into the logic board is a 3.6 V 1/2AA lithium battery, which must be present in order for basic settings to persist between power cycles. Macintosh SE machines which have sat for a long time have experienced battery corrosion and leakage, resulting in a damaged case and logic board.

Expansion: A Processor Direct Slot on the logic board allows for expansion cards, such as accelerators, to be installed. The SE can be upgraded to 50 MHz and more than 5 MB with the MicroMac accelerators. In the past other accelerators were also available such as the Sonnet Allegro. Since installing a card required opening the computer's case and exposing the user to high voltages from the internal CRT, Apple recommended that only authorized Apple dealers install the cards; the case was sealed with then-uncommon Torx screws.

Upgrades: After Apple introduced the Macintosh SE/30 in January, 1989, a logic board upgrade was sold by Apple dealers as a high-cost upgrade for the SE, consisting of a new SE/30 motherboard, case front and internal chassis to accommodate the upgrade components.

Easter egg: The Macintosh SE ROM size increased from 64 KB in the original Mac and 128 KB in the Mac Plus to 256 KB, which allowed the development team to include an Easter Egg hidden in the ROMs. By jumping to address 0x41D89A or reading from the ROM chips it is possible to display the four images of the engineering team.^[8][9]

Models[edit]

Introduced March 2, 1987:

• Macintosh SE^[10]

Introduced August 1, 1989:

• Macintosh SE FDHD: Includes the new SuperDrive, a floppy disk drive that can handle 1.4 MB High Density (HD) floppy disks. FDHD is an acronym for 'Floppy Disk High Density'; later some Macintosh SE FDHDs were labeled Macintosh SE Superdrive, to conform to Apple's marketing change with respect to their new drive. High-density floppies would become the de facto standard on both the Macintosh and PC computers from then on. An upgrade kit was sold for the original Macintosh SE which included new ROM chips and a new disk controller chip, to replace the originals.^[11]
• Macintosh SE 1/20: The name of the Macintosh SE FDHD with a 20 MB HDD when sold in Europe.
• Macintosh SE 1/40: The name of the Macintosh SE FDHD with a 40 MB HDD when sold in Europe.

Timeline of compact Macintosh models

See also[edit]

References[edit]

1. ^Joel West (March 2, 1987). 'Macintosh II and Macintosh SE announced'. Newsgroup: comp.sys.mac. Usenet:2790@sdcsvax.UCSD.EDU. Retrieved January 26, 2014.
2. ^Goodin, Sue; Wilson, Dave (April 1987). 'Programming the New Macs'. Vol. 3 no. 5. MacTech.Cite magazine requires magazine= (help)
3. ^ ^ab'How the SE Really Differs'. MacWorld Magazine. May 1987. p. 116.
4. ^'Vectronic's Macintosh SE'.
5. ^'Transparent Macintosh SE'. Low End Mac. Retrieved February 8, 2007.
6. ^'Macintosh hardware releases'. earlymacintosh.org.
7. ^'Macintosh: System Software Version History'.
8. ^'Macintosh Plus Easter Egg - Image of Designers in ROM'. September 12, 1999. Retrieved January 26, 2014.
9. ^Trammell Hudson (August 21, 2012). 'Ghosts in the ROM'. NYC Resistor. Archived from the original on February 17, 2015. Retrieved January 26, 2014.
10. ^'Macintosh SE: Technical Specifications'. Apple.
11. ^'Macintosh SE FDHD: Technical Specifications'. Apple.

External links[edit]

• The Mac SE Support Pages Repair & upgrade advice.
• Mac SE Low End Mac

The Macintosh SE/30 is a personal computer designed, manufactured and sold by Apple Computer, Inc. from January 1989 to October 1991. It is the fastest of the original black-and-white compact Macintosh series.

The SE/30 has a black-and-white monitor and a single Processor Direct Slot (rather than the NuBus slots of the IIx, with which the SE/30 shares a common architecture) which supported third-party accelerators, network cards, or a display adapter. Although officially only able to support 32 MB, the SE/30 could expand up to 128 MB of RAM (a significant amount of RAM at the time), and included a 40 or 80 MB hard drive. It was also the first compact Mac to include a 1.44 MB high density floppy disk drive as standard (late versions of the SE had one, but earlier versions did not). The power of the SE/30 was demonstrated by its use to produce the This Week newspaper, the first colour tabloid newspaper in the UK to use new, digital pre-press technology on a personal, desktop computer. In keeping with Apple's practice, from the Apple II+ until the Power Macintosh G3 was announced, a logic board upgrade was available to convert a regular SE to an SE/30. The SE would then have exactly the same specs as an SE/30, with the difference only in the floppy drive if the SE had an 800 KB drive. The set included a new front bezel to replace the original SE bezel with that of an SE/30.

Macintosh Hard Disk 20 Model M0135 For Mac Free

In the naming scheme used at that time, Apple indicated the presence of a 68030 processor by adding the letter 'x' to a model's name. When the Macintosh SE was upgraded with the 68030 processor, this posed an awkward problem; Apple was not willing to name their new computer the 'Macintosh SEx'. Thus, 'SE/30' was the name chosen.^{[citation needed]} Internally, code names such as Green Jade, Fafnir, and Roadrunner were used.^[2]

This machine was followed in 1991 by the Macintosh Classic II, which, despite the same processor and clock speed, was only 60% as fast as the SE/30 due to its 16-bit data path,^[3] supported no more than 10 MB of memory, lacked an internal expansion slot, and made the Motorola 68882 FPU an optional upgrade.

Hardware[edit]

Although it uses 32-bit instructions, the SE/30 ROM, like the IIx ROM, includes some code using 24-bit addressing, rendering the ROM '32-bit dirty'. This limited the actual amount of RAM that can be accessed to 8 MB under System 6.0.8.^[1] A system extension called MODE32 enables access to installed extra memory under System 6.0.8. Under System 7.0 up to System 7.5.5 the SE/30 can use up to 128 MB of RAM. Alternatively, replacing the ROM SIMM with one from a Mac IIsi or Mac IIfx makes the SE/30 '32-bit-clean' and thereby enables use of up to 128 MB RAM and System 7.5 through OS 7.6.1.

A standard SE/30 can run up to System 7.5.5,^[4] since Mac OS 7.6 requires a 32-bit-clean ROM.^[5]

Additionally, the SE/30 can run A/UX, Apple's older version of a Unix that was able to run Macintosh programs.^[6]

Though there was no official upgrade path for the SE/30, several third-party processor upgrades were available. A 68040 upgrade made it possible to run Mac OS 8.1, which extended the SE/30's productive life for many more years. The Micron Technology Xceed Gray-Scale 30 video card fit into the SE/30's Processor Direct Slot, enabling it to display greyscale video on its internal display, the only non-color compact Mac able to do so.^[7][8]

Models[edit]

• Macintosh SE/30:^[9] Available in multiple configurations.
  • US$4,369 (1MB RAM, No hard disk)
  • US$4,869 (1MB RAM, 40MB Hard disk)
  • US$6,569 (4MB RAM, 80MB Hard disk)^[10]

Reception[edit]

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Bruce F. Webster wrote in Macworld in March 1989 that the SE/30 did not 'break new ground. It does, however, establish Apple's commitment to the classic Mac product line, and it provides users with an Apple-supported alternative to either a small, slow Mac or a large, powerful one. More important, it fills a gap in the Macintosh family ... a new level of power and portability for the Macintosh community'.^[11]

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In a January 2009 Macworld feature commemorating the 25th anniversary of the Macintosh, three industry commentators – Adam C. Engst of TidBITS, John Gruber of Daring Fireball, and John Siracusa of Ars Technica – chose the SE/30 as their favorite Mac model of all time. 'Like any great Mac,' wrote Gruber, 'the SE/30 wasn't just a terrific system just when it debuted; it remained eminently usable for years to come. When I think of the original Mac era, the machine in my mind is the SE/30.'

The SE/30 remains popular with hobbyists, and has been described as “the best computer Apple will ever make,”^[12] with used models selling for a significant premium relative to other machines of the era. Contemporary PDS upgrades allowed an SE/30’s internal monitor to be upgraded to support 256 shades of gray^[13] (the only original-design Macintosh to support such an upgrade) or a 68040 processor, and the SE/30’s standard RAM limit of 128MB greatly exceeded even that of much later models such as the Color Classic and Macintosh LC II. In 2018, add-ons and software became available to add WiFi^[12] and even streaming Spotify support^[14] to the SE/30.

Popular culture[edit]

In the NBC TV series Seinfeld, Jerry has an SE/30 sitting on his desk during the first seasons. This would be the first of many Macs to occupy the desk, including a PowerBook Duo and a Twentieth Anniversary Macintosh.

In the FX series It's Always Sunny In Philadelphia, the Waitress is seen with a Macintosh SE/30 on her bedroom desk in the episode 'The Gang Gives Back'.

In the film Watchmen, Ozymandias has an all-black TEMPEST-shielded SE/30 on his desk.^[15]

Timeline of compact Macintosh models

References[edit]

1. ^ ^abPogue, David; Schorr, Joseph (1999). MacWorld Mac Secrets, 5th Edition. IDG Books. pp. 461-462. ISBN0-7645-4040-8.
2. ^Linzmayer, Owen W. (2004). Apple Confidential 2.0. No Starch Press. p. 48. ISBN1-59327-010-0.
3. ^'Mac Classic II, a Compromised Mac'. Low End Mac. March 12, 2014.
4. ^'25 Years of the Mac SE/30'. Low End Mac. January 19, 2014.
5. ^'Lowendmac'. Minimum requirements for Mac OS 7.6 included a 68030 CPU, '32-bit clean' ROMs, 8 MB of RAM (12-16 MB recommended), and 70 MB of hard drive space. It no longer supported 24-bit addressing or classic Mac networking (it used OpenTransport exclusively).
6. ^'A/UX FAQ'. A/UX 3.0 works on the Mac II (with PMMU or 68030 upgrade with FDHD ROM's installed), IIx, IIcx, IIci, IIfx, SE/30, IIsi (with 68882 chip) and the Quadra 700/900/950 computers.
7. ^'SE/30 GrayScale ScreenShots'. Archived from the original on June 12, 2002. Retrieved July 20, 2020.
8. ^'Micron Xceed for Mac SE/30'. Low End Mac. September 2, 1999.
9. ^'Macintosh SE/30: Technical Specifications'. Apple.
10. ^'InfoWorld March 27, 1989'.
11. ^Webster, Bruce F. (March 1989). 'The Mac SE Turns 030'. Macworld. pp. 112–117. Retrieved August 20, 2016.
12. ^ ^abBy (September 26, 2018). 'Apple's Best Computer Gets WiFi'. Hackaday. Retrieved August 10, 2019.
13. ^'Micron Xceed for Mac SE/30'. Low End Mac. September 2, 1999. Retrieved August 11, 2019.
14. ^Coward, Cameron (December 26, 2018). 'A Macintosh SE/30 Spotify Music Player'. Medium. Retrieved August 10, 2019.
15. ^Diaz, Jesus (March 6, 2009). 'Watchmen's Old School Macintosh SE/30'. Gizmodo. Archived from the original on July 2, 2012. Retrieved September 2, 2020.

Macintosh Hard Disk 20 Model M0135 For Mac