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#ALTAIR 880 EMULATOR FOR MAC PC#
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Convinced that magnetic- disk storage would make the Intellec-8 more efficient, Kildall interfaced the computer with an 8-inch Shugart Associates floppy disk drive using a custom built floppy disk controller. Information Terminals Corporation (ITC) introduces the first two-sided, double-capacity floppy disk-the model FF34-2000 flippy disk, compatible with IBM's 8-inch disk. The dominant mainframe at the time, the IBM System/360, can address 2 24 (16,777,216) memory locations, or 16 megabytes (MB) of memory. Intel releases the 8080 (cost $360), which has a 16-bit address bus that can address 2 16 (65,536) memory locations, or 64 KB of memory. The 8-bit 8008 has a 14-bit address bus that can address 2 14 (16,384) memory locations, or 16 KB of memory. īill Gates, Paul Allen and Paul Gilbert develop the Traf-O-Data Intel 8008-based computer. CP/M runs in approximately 3 1 ⁄ 2 kilobytes (KB) of memory. CP/M was finished before the hardware to run it on was completed, by using a PDP-10 to simulate the 8080. The Intellec-8 supported a Teletype operating at 110 baud, a high speed punched paper tape reader and a CRT terminal at 1200 baud. While working as a consultant to Intel, Gary Kildall, an instructor at the Naval Postgraduate School, writes CP/M, a simple "Control Program/Monitor" for an 8-bit Intel 8080 microprocessor-based Intellec-8 microcomputer development system given him by Intel, to test out his PL/M compiler. IBM introduces Winchester hard disk drive technology with the IBM 3340 direct access storage device for use on their System/370 mainframes. IBM introduces the IBM 3740 data entry system, which introduced a new recording medium -a single-sided 8-inch-diameter read/write " memory disk"-the IBM diskette, to replace punched cards. Hard disk drive, directories, device driversģ 1 ⁄ 2-inch 1.44 MB floppy support, extended partitions

Major market-leading releases and releases introducing significant new technology Overview First end-user releases of IBM–Microsoft-compatible versions

#ALTAIR 880 EMULATOR FOR MAC DOWNLOAD#

Free download – starting with OpenDOS 7.01 in 1997, followed by FreeDOS in 1998.

DR-DOS began selling to end users with version 5.0 in July 1990, followed by MS-DOS 5.0 in June 1991

#ALTAIR 880 EMULATOR FOR MAC PC#

End-user retail – all versions of IBM PC DOS (and other OEM-adapted versions) were sold to end users.

Shrink wrap packaged product for smaller OEMs ( system builders) – starting with MS-DOS 3.2 in 1986, Microsoft offered these in addition to OAKs.

OEM adaption kits (OAKs) – all Microsoft releases before version 3.2 were OAKs only.

Other operating systems named "DOS" are generally not part of the scope of this timeline. This article presents a timeline of events in the history of x86 DOS operating systems from 1973 to 2014.