# ibm pc Published articles for ibm pc. This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles. ## The IBM PC 5150, Revision A vs Revision B DevFeed: [The IBM PC 5150, Revision A vs Revision B]() Original publisher: [Read original article]() Author: Anne Barela Published: 2026-10-28T20:39:45Z Content type: comparison Language: en Sources: [Adafruit Industries]() Topics: [pc]() Tags: [5150](), [bios](), [black](), [controllers](), [dave](), [drive](), [hard-drive](), [ibm](), [ibm-pc](), [metal](), [microcontrollers](), [micropython](), [newsletter](), [npi](), [october](), [original](), [package](), [python](), [reverse-engineering](), [revision](), [silicon](), [vintage](), [vintage-computing]() ### AI overview The 5150 revisions look alike from the front, but the rear distinguishes them: Revision B has a circled B and five screw positions; Revision A has two. Revision A also shipped with a black power supply. It is scarcer and more collectible, but its early BIOS is limited to 544K, ignores option ROMs on EGA, VGA, and hard drive controllers, and its systems often had single sided floppy drives. Revision B supports 640K and runs software short of 286 programs. Farquhar estimates about 600,000 Revision A and 2.7 million Revision B units among 3.3 million 5150s. He considers the 5160 XT a better machine and bargain. These details come from the supplied excerpt. ### Source excerpt Dave Farquhar at The Silicon Underground compares the two versions of the original IBM PC 5150, pegged to the October 27, 1982 date on the Revision B BIOS. The fronts look identical. The back tells you which one you have: Revision B is marked with a B in a circle and has positions for five [...] ## How a Single University Project Started Everything DevFeed: [How a Single University Project Started Everything]() Original publisher: [Read original article]() Author: Jenny List Published: 2026-10-27T23:00:07Z Content type: news Language: en Sources: [Hackaday]() Topics: [pc](), [Internet](), [Internets of interest]() Tags: [68000](), [bank](), [board](), [cisco](), [computing](), [cons](), [cpu](), [design](), [ethernet](), [festival](), [first](), [gpu](), [graphics](), [graphics-cards](), [history](), [ibm](), [ibm-pc](), [mmu](), [personal](), [retrocomputing](), [sgi](), [sram](), [sun-microsystems](), [university](), [vintage-computer-festival]() ### AI overview A workstation board designed by Andy Bechtolsheim for Stanford's SUN project became a shared foundation for several early computing products. Because Motorola's 68000 lacked the memory management unit needed for UNIX, the board added an external MMU using SRAM as a page table. Sun supplied the CPU board to other companies: it powered the first SGI workstation, appeared in early Imagen laser printers and AppleTalk-to-Ethernet bridges, and its use in a router led to software that became part of Cisco's first product. The excerpt traces these connections but does not provide dates or further technical detail for most products. ### Source excerpt If we care to cast an eye over the history of ubiquitous personal computing as we know it today, we might immediately point at the original IBM PC. After all, ...read more ## What happened to Ashton-Tate and dBase DevFeed: [What happened to Ashton-Tate and dBase]() Original publisher: [Read original article]() Author: Anne Barela Published: 2026-10-13T13:41:20Z Content type: article Language: en Sources: [Adafruit Industries]() Topics: [Post Mortem](), [JSON](), [pc](), [sharding]() Tags: [ashton-tate](), [cp-m](), [database](), [databases](), [dave](), [dbase](), [ibm](), [ibm-pc](), [october](), [pc](), [silicon](), [software](), [sql](), [standard](), [vintage-computing]() ### AI overview The article recounts the decline of Ashton-Tate and its dBase database software. It describes dBase's popularity on CP/M and IBM PC systems, maintenance problems after dBase III was translated into C, the troubled release of dBase IV, and customers shifting to competing products. It also traces Microsoft's acquisition of Fox Software and the development of Access. ### Source excerpt Dave Farquhar traces the fall of Ashton-Tate and dBase at The Silicon Underground. dBase II dominated CP/M machines, then did the same on the IBM PC, and dBase III made the format the de facto standard for microcomputer databases. Borland bought Ashton-Tate on October 12, 1991 for $439 million. The purchase was already damaged. dBase [...]