[Yeo Kheng Meng] didn’t cheat by simply running MS-DOS on a modern PC, either: he tested the client on a real 1984 vintage IBM 5155 Portable PC. This semi-portable PC/XT model sports a 4.77 MHz ...

[Yeo Kheng Meng] didn’t cheat by simply running MS-DOS on a modern PC, either: he tested the client on a real 1984 vintage IBM 5155 Portable PC. This semi-portable PC/XT model sports a 4.77 MHz ...

it lost interest in MS-DOS and last year released the source to MS-DOS 4. IBM continued development work on its flavor, PC DOS, for rather longer, releasing PC DOS 6.3, 7.0 and 7.1, as lead developer ...

But in the early 1980s, when the first version of the IBM Personal Computer came out, the PC market looked much different and was more expensive. And while driven by a Microsoft operating system — ...

AT-class machines ran DOS and were extremely sluggish under Windows. See 286. The original PC launched by IBM in 1981 used Intel's 16-bit 8088 CPU. This chip family was designed so that the ...