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The Intel 8088 CPU, used in the original IBM PC, was able to address 1 MB (2 20 bytes), since the chip offered 20 address lines. In the design of the PC, the memory below 640 KB was for random-access memory on the motherboard or on expansion boards, and it was called the conventional memory area.
1 MB: 1.2 3.9 / 3.2 First desktop Amiga with internal expansion slots used the Amiga 1000 chipset 512 KB Chip RAM, 512 KB Fast RAM on CPU slot card Amiga 500: 1987–1991 68000 512 KB 1.2 – 1.3 3.1 / 3.2 First "low-end" Amiga; later A500s shipped with 1 MB memory Amiga 2000: 1987–1992 68000 1 MB: 1.2 – 2.04 3.9 / 3.2
1.2 MB 20 MB Industrial version of the IBM PC XT [33] [34] 7531 Industrial Computer: 7531-041 May 1985: Unknown ISA, 16-bit 8 3 Intel 80286: 6 512 KB 1 MB Unknown Unknown Industrial version of the IBM PC AT, tower form-factor 7532 Industrial Computer: 7532-041 May 1985: Unknown ISA, 16-bit 8 3 Intel 80286: 6 512 KB 1 MB Unknown Unknown
30-pin SIMM, 256 KB capacity Two 30-pin SIMM slots on an IBM PS/2 Model 50 motherboard. Standard sizes: 256 KB, 1 MB, 4 MB, 16 MB. 30-pin SIMMs have 12 address lines, which can provide a total of 24 address bits. With an 8-bit data width, this leads to an absolute maximum capacity of 16 MB for both parity and non-parity modules (the additional redundancy-bit chip usually doe
For the initial models, the daughtercard carries 1 MB of RAM stock, and can be expanded to take up to 2 MB (half of its RAM sockets are unpopulated). [1]: 8 The daughtercard itself contains a slot that can hold a special "piggyback" card that carries 4 MB of RAM stock, upgradable up to 8 MB. The highest amount of RAM that Compaq offered in this ...
In February 2005, Samsung demonstrated the first DDR3 memory prototype, with a capacity of 512 Mb and a bandwidth of 1.066 Gbps. [2] Products in the form of motherboards appeared on the market in June 2007 [ 14 ] based on Intel 's P35 "Bearlake" chipset with DIMMs at bandwidths up to DDR3-1600 (PC3-12800). [ 15 ]
One high density 3.5 inch 1.44 MB floppy drive comes installed. There are three 16-bit expansion slots, all of which run at the full CPU clock rate of 10 MHz. One megabyte of RAM comes installed, and using expansion slots RAM can go to 16 MB (the maximum addressable by the 286). The motherboard has a built-in SmartDrive hard drive controller.
Although the Amstrad PC1512 and PC1640 had to compete against faster AT-type architectures at the time of their release, they were sufficiently powerful to run office software popular in the late 1980s and early 1990s, including WordPerfect 5.1, WordStar, Microsoft Word 4 and 5 for DOS, the spreadsheet Lotus 1-2-3, Matlab, and the database ...
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