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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 ...
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 .
The Macintosh Plus was the last classic Mac to have an RJ11 port on the front of the unit for the keyboard, as well as the DE-9 connector for the mouse; models released after the Macintosh Plus would use ADB ports. The Mac Plus was the first Apple computer to utilize user-upgradable SIMM memory modules instead of single DIP DRAM chips. Four ...
Though the memory had been quadrupled, it could not be upgraded. The large increase earned it the nickname Fat Mac. A 64 KB ROM chip boosts the effective memory to 576 KB, but this is offset by the display's 22 KB framebuffer, which is shared with the DMA video controller. This shared arrangement reduces CPU performance by up to 35%.
The Apple IIe (styled as Apple //e) is the third model in the Apple II series of personal computers produced by Apple Computer. It was released in January 1983 as the successor to the Apple II Plus. The e in the name stands for enhanced. It is the first Apple II with built-in lowercase and 80-column text support, as well as 64K RAM, while ...
Memory: The standard memory was 1 megabyte, expandable to 8 MB. [26] The Mac II had eight 30-pin SIMMs, and memory was installed in groups of four (called "Bank A" and "Bank B"). The original Macintosh II did not have a PMMU by default. It relied on the memory controller hardware to map the installed memory into a contiguous address space. This ...
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 ...
Apple's decision to not update the Classic with newer technology such as a newer CPU, higher RAM capacity or color display resulted in criticism from reviewers, with Macworld describing it as having "nothing to gloat about beyond its low price" [4] and "unexceptional". [5]
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