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Apple sold an official memory upgrade for the Macintosh 128K, which included a motherboard replacement effectively making it a Macintosh 512K, for the price of US$995. [ 55 ] [ 56 ] [ 57 ] Additionally, Apple offered an 800 KB floppy disk drive kit, including updated 128K ROMs .
It shared a revised logic board with the rebadged Macintosh 128K (previously just called the Macintosh), which streamlined manufacturing. The resolution of the display was the same at 512 × 342. Apple sold a memory upgrade for the Macintosh 128K for $995 initially, and reduced the price when 256 Kb DRAM prices fell months later. [4]
Protected memory was only added to Macintosh computers with the release of the Mac OS X operating system. According to Andy Hertzfeld, the Macintosh used for the introduction demo on January 24, 1984, was a prototype with 512k RAM, even though the first model offered for sale implemented just 128k of non-expandable memory. This prototype was ...
Inside a Macintosh Plus; the cathode-ray tube and its associated circuitry on its right side take up a considerable amount of interior space. An upgrade kit was offered for the earlier Macintosh 128K and Macintosh 512K/enhanced, which includes a new motherboard, floppy disk drive and rear case. The owner retained the front case, monitor and ...
System 7.1–Mac OS 7.6.1 With 68040 upgrade, Mac OS 8.1, or with PowerPC upgrade, Mac OS 9.1: CPU: Motorola 68030 @ 16 or 33 MHz: Memory: 4 MB onboard, upgradable to 10 MB; With logicboard upgrade: 64 MB, unofficially supports 128 MB of RAM (100 ns 30-pin SIMM) Display: 10 inches (25 cm), 512 x 384 (switchable to 560 x 384) Dimensions: Height ...
One further upgrade made by Apple replaced the logic board and the rear case (to accommodate the different port configuration) with those of the Macintosh Plus, providing built-in SCSI functionality and up to 4 MB RAM. Because Apple's official upgrades were costly, many third-party manufacturers offered add-on SCSI cards, as well as RAM ...
As a result, only the Macintosh 512K can access it; the original Macintosh 128K does not have enough RAM to load the new file system. In fact, even for the Macintosh 512K to use the drive, it requires an additional file in the System Folder on a special startup disk which adds additional code into memory during startup.
The Apple 80-Column Text Card is an expansion card for the Apple IIe computer to give it the option of displaying 80 columns of text instead of 40 columns. Two models were available; the cheaper 80-column card has just enough extra RAM to double the video memory capacity, and the Extended 80-Column Text Card has an additional 64 kilobytes of RAM, bringing the computer's total RAM to 128 KB.
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