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Macintosh Plus

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694:, which includes a new motherboard, floppy disk drive and rear case. The owner retained the front case, monitor and analog board. Because of this, there is no "Macintosh Plus" on the front of upgraded units, and the Apple logo is recessed and in the bottom left hand corner of the front case. However, the label on the back of the case reads "Macintosh Plus 1MB". The new extended Plus keyboard could also be purchased. Unfortunately, this upgrade cost almost as much as a new machine. 149: 669: 707: 45: 621: 574:, identical to that of previous Macintosh models. Unlike earlier Macs, the Mac Plus's keyboard includes a numeric keypad and directional arrow keys and, as with previous Macs, it has a one-button mouse and no fan, making it extremely quiet in operation. The lack of a cooling fan in the Mac Plus led to frequent problems with overheating and hardware malfunctions. 617:) were actually developed and released first for the Macintosh, and similarly Microsoft Word 1 for Macintosh was the first time a GUI version of that software was introduced on any personal computer platform. For a time, the exclusive availability of Excel and PageMaker on the Macintosh were noticeable drivers of sales for the platform. 779:
The Plus went through two ROM revisions during its general market relevance. The initial ROM was replaced after the first two months as it had a serious bug which prevented the Mac from booting if an external SCSI device was powered off. The second revision fixed a problem with some SCSI devices that
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on the back, to denote the 1 MB RAM configuration with which it shipped. In January 1987 it transitioned to Apple's long-lived platinum-gray color with the rest of the Apple product line, and the keyboard's keycaps changed from brown to gray. In January 1988, with reduced RAM prices, Apple began
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joints inside it would fracture, causing many problems, such as loss of deflection in the monitor or a complete loss of power. As in most early compact Macs, the problem was common in the yoke connector, flyback transformer, and horizontal drive coupling capacitor. A fan was also often added to
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before it and offered to the educational market badged as the "Macintosh Plus ED". Due to its popularity, long life and its introduction of many features that would become mainstays of the Macintosh platform for years, the Plus was a common "base model" for many software and hardware products.
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DRAM chips. Four SIMM slots were provided and the computer shipped with four 256 KB SIMMs, for 1 MB total RAM. By replacing them with 1 MB SIMMs, it was possible to have 4 MB of RAM. (Although 30-pin SIMMs could support up to 16 MB total RAM, the Mac Plus motherboard had only 22 address lines
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before it, but it essentially retained the original design. On the inside of the case, embossed into it, are the signatures of all the people who worked on designing the Mac Plus, including Steve Jobs, Bill Atkinson, Andy Hertzfeld, Bruce Horn, Jef Raskin and the rest of the historic team.
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The Mac Plus itself can be upgraded further with the use of third-party accelerators. When these are clipped or soldered onto the 68000 processor, a 32 MHz 68030 processor can be used, and up to 16 MB RAM.
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volume details how to use HFS and the rest of the Mac Plus's new system software. The Plus still did not include provision for an internal hard drive and it would be over nine months before Apple would offer a SCSI
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drives. The 800 KB drive has two read/write heads, enabling it to simultaneously use both sides of the floppy disk and thereby double storage capacity. Like the 400 KB drive before it, a companion
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The Mac Plus has 128 KB of ROM on the motherboard, which is double the amount of ROM in previous Macs; the ROMs included software to support SCSI, the then-new 800 KB floppy drive, and the
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was an available option. However, with the increased disk storage capacity combined with 2-4x the available RAM, the external drive was less of a necessity than it had been with the 128K and 512K.
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on October 15, 1990. This made the Macintosh Plus the longest-produced Macintosh model, having been on sale unchanged for 1,734 days, a record not surpassed until the second-generation
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of RAM ... the new 128K-byte ROM ... and a double-sided (800K bytes) disk drive, all in the standard Mac box." Introduced as the Macintosh Plus, it was the first
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reported a rumor in December 1985: "Supposedly, Apple will be releasing a Big Mac by the time this column sees print: said Mac will reportedly come with 1
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453; however, in 1987, the case color was changed to the long-lived, warm gray "Platinum" color. It is the earliest Macintosh model able to run
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for the slow Hard Disk 20. It would be well over a year before Apple would offer the first internal hard disk drive in any Macintosh.
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in which all files were stored in a single directory, with one level of pseudo-folders overlaid on them). For programmers, the fourth
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port, which launched the popularity of external SCSI devices for Macs, including hard disks, tape drives, CD-ROM drives, printers,
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peripheral bus, among smaller improvements. Originally, the computer's case was the same beige color as the original Macintosh,
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through the Macintosh Plus, various third-party cooling add-ons were available to help increase airflow through the unit.
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The lack of fan could cause the life of a Macintosh Plus to end early for some users. As the power supply would heat up,
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The "ED" at the end of the model name indicates that this Macintosh was sold to the educational market.
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in March 1987, it remained in production as a cheaper alternative until the introduction of the
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and its associated circuitry on its right side take up a considerable amount of interior space.
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from previous Macs, along with backward compatibility. The drive is controlled by the same
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reorganized the compact Macintosh case to accommodate a fan with the release of the
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Although the Macintosh Plus would become overshadowed by two new Macintoshes, the
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reduce heat when the machine was upgraded to its full RAM capacity of 4 MB.
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This article is about the Macintosh computer. For the electronic musician, see
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were also bundled. Third-party software applications available included
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shipping 2- and 4- MB configurations and rebranded it simply as "
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The Mac Plus was the first Apple computer to utilize user-upgradable
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Macintosh Plus at the Museo Nacional de Ciencia y Tecnología in Spain
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in 2018. It continued to be supported by versions of the
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The case design is essentially identical to the original
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The Macintosh Plus was the last classic Mac to have an
392:, introduced on January 16, 1986, two years after the 476:; models released after the Macintosh Plus would use 1249:"Still Useful after All These Years -- The Mac Plus" 2271: 2248: 2195: 2164: 2118: 2062: 2009: 2002: 1923: 1785: 1660: 1592: 1539: 1486: 1428: 1370: 1361: 585:were bundled with the Mac Plus. After August 1987, 528:. The drive was still completely incompatible with 363: 345: 331: 323: 311: 303: 295: 279: 266: 249: 217: 206: 188: 178: 168: 158: 613:. Microsoft Excel and PowerPoint (originally by 570:monochrome display with a resolution of 72  805:a Mac Plus on a variety of platforms including 566:, the Plus has a 9-inch (23 cm) 512 × 342 27:Third model of Apple's Macintosh computer line 1338: 1048:. Vol. 10, no. 13. pp. 405–418 979:"History of computer design: Apple Macintosh" 874: 8: 1009:"History of computer design: Macintosh Plus" 780:could send the Mac into an endless reset at 420:, up to System 7.5.5, but not System 7.5.2. 299:9 in (23 cm) monochrome, 512 × 342 141: 1040:"Microcomputer Color Graphics-Observations" 680:An upgrade kit was offered for the earlier 2361:Products and services discontinued in 1996 2356:Products and services discontinued in 1990 2006: 1367: 1345: 1331: 1323: 1099:"Macintosh Plus: Technical Specifications" 881: 867: 147: 140: 521:chip as in previous models, implementing 129:Learn how and when to remove this message 1318:BYTE takes an early look at the Mac Plus 854: 619: 396:and a little more than a year after the 1312:Macintosh Plus technical specifications 940: 287:RAM, expandable to 4 MB (150 ns 30-pin 2351:Computer-related introductions in 1986 1192:from the original on September 6, 2022 1186:Never trust a computer you can't lift! 1182:"Picture of "Macintosh Plus ED" front" 643:. It debuted in beige and was labeled 464:port on the front of the unit for the 65:Please improve this article by adding 1247:Knight, Daniel (September 16, 1998). 1105:from the original on October 26, 2014 7: 1136:from the original on October 6, 2022 213: (equivalent to $ 7,220 in 2023) 1162:from the original on March 24, 2018 388:computer is the third model in the 1259:from the original on June 27, 2006 1079:from the original on July 11, 2015 989:from the original on July 31, 2017 513:, offering double the capacity of 25: 1067:Knight, Daniel (March 24, 2013). 1019:from the original on May 14, 2017 955:. August 11, 2006. Archived from 949:"The 25 Greatest PCs of All Time" 487:memory modules instead of single 315:Height: 13.6 in (35 cm) 2146:Mouse and other pointing devices 1963:Macintosh Processor Upgrade Card 1279:"Technical Note DV14: SCSI Bugs" 1069:"ScuzzyGraph and ScuzzyGraph II" 1038:Webster, Bruce (December 1985). 624:The Apple Macintosh Plus at the 492:connected, for a 4 MB maximum.) 319:Depth: 10.9 in (28 cm) 43: 1985:Twentieth Anniversary Macintosh 317:Width: 9.6 in (24 cm) 2034:AppleColor High-Resolution RGB 1285:. July 1, 1987. Archived from 1: 672:Inside a Macintosh Plus; the 535:Macintosh 800K External Drive 67:secondary or tertiary sources 837:and even Texas Instruments' 495:It has what was then a new 2377: 2279:Interactive Television Box 1212:"Classic Mac Repair Notes" 919: 327:16.5 lb (7.5 kg) 245:(operating system updates) 29: 2322:Apple hardware since 1998 2318: 841:graphing calculator line. 146: 2182:Apple Communication Slot 2029:AppleColor Composite IIe 649:Macintosh Plus 1 Mb 542:Hierarchical File System 2346:68k Macintosh computers 234:September 27, 1996 1968:Apple Workgroup Server 759:From the debut of the 711: 677: 636: 236:; 27 years ago 223:; 33 years ago 194:; 38 years ago 54:relies excessively on 2172:Apple II serial cards 1674:68k-based PowerBooks 709: 671: 623: 546:Macintosh File System 221:October 15, 1990 192:January 16, 1986 1980:Apple Network Server 1936:Big Mac and Baby Mac 1356:hardware before 1998 702:Long production life 173:Apple Computer, Inc. 2320:See also template: 2215:Daisy Wheel Printer 2141:Adjustable Keyboard 1803:5200 LC and 5300 LC 1289:on October 29, 2004 1283:developer.apple.com 511:800 KB floppy drive 509:-inch double-sided 445:model to include a 143: 2210:Dot Matrix Printer 1947:Macintosh Performa 1915:Power Macintosh G3 1746:-based PowerBooks 1670:Macintosh Portable 922:List of Mac models 712: 678: 647:on the front, but 637: 472:connector for the 394:original Macintosh 207:Introductory price 2341:Compact Macintosh 2328: 2327: 2314: 2313: 2235:Color LaserWriter 2230:410 Color Plotter 2136:Extended Keyboard 1998: 1997: 1990:Macintosh history 1952:Macintosh Centris 1430:Compact Macintosh 932: 931: 926:Compact Macintosh 860:Compact Macintosh 724:Macintosh Classic 577:The applications 557:drive replacement 468:, as well as the 410:System Software 5 382: 381: 354:Macintosh Classic 183:Compact Macintosh 139: 138: 131: 113: 16:(Redirected from 2368: 2049:Multiple Scan 14 2007: 1594:Macintosh Quadra 1368: 1347: 1340: 1333: 1324: 1299: 1298: 1296: 1294: 1275: 1269: 1268: 1266: 1264: 1244: 1238: 1237: 1235: 1233: 1227: 1221:. 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Index

Mac Plus
Vektroid

references
primary sources
secondary or tertiary sources
"Macintosh Plus"
news
newspapers
books
scholar
JSTOR
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Macintosh Plus monitor, keyboard, mouse, and floppy disk in a museum display case
Apple Computer, Inc.
Compact Macintosh
Operating system
System 3.0
7.5.5
CPU
Motorola 68000
MB
SIMM
Macintosh 512K
Macintosh XL
Macintosh SE
Macintosh Classic
Macintosh II
Macintosh 512Ke
Apple IIGS

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