However, some third-party solutions emerged. 5 expansion slots, 5, 10, 20 MB hard discs. There were only two known commercial IBM PC cassette-based applications: IBM Diagnostics, and Microsoft Typing Tutor. The IBM PC, model 5150 and the IBM PCjr include a cassette tape interface port. An extender card located in a host PC/XT system connects to a receiver card located in the expansion chassis using a large 62-pin D-sub cable. Oh, and the aforementioned ISA expansion card was a Quadboard QuadRAM from 1982… And its timekeeping had to be set through a BASIC script, with the date suffering from Y2K problems. - The BIOS on the 5150 motherboard has no support for hard drives. April 1st, 2014, 07:51 PM. A "standard" 5150 comes with dual floppy disk drives. This project duplicates both the extender and receiver cards used in the IBM 5161 expansion chassis. In contrast, this one sported a ½ height 20 MB disk drive and a ½ height floppy drive plus these cards: Paradise Basic EGA card ; Six Pack Plus card which includes RAM expansion, calendar/clock and serial port. That’s because IBM intended the 5150 to be a serious machine for people doing serious work. This is a box that looks identical to an IBM PC, only it has simple backplane instead of a motherboard. IBM PC - Model 5150 IBM PC-5150 is the computer, which caused the death of CP/M computers. - The IBM 5150's 63W power supply was inadequate to power both the 5150 and hard drives of the time. The SW2 switches are to be set to the total amount of conventional memory fitted in the 5150 (total = conventional on motherboard + conventional on expansion cards). Today I am tackling the issue with my add in ram card on my 5150. The IBM 5150 motherboard posts with a single short beep if there are no errors. The battery was ditched without replacement Running the SuperSoft ROM diagnostics for the IBM 5150, placed in socket U33 through a 2364-to-2764 PROM adapter. Don't assume that a card that support the IBM PC/XT (5160) it will work in the IBM PC (5150). Switch block SW2 Of SW1 and SW2, SW2 is the switch block closest to the edge of the motherboard. What modern day use might an IBM 5150 PC have? PRICE . The machine was far from vanilla. The owner might be able to supply extra peripheral devices such as external drives and expansion cards. In the PC's five ISA expansion slots, I found a CGA video card, a memory expansion card… Additionally, Apple included a Game I/O port on its motherboard, on the PC it must be added by or as part of an expansion card. Ozfer. Collectors and hobbyists with interest in vintage computing will want this to run classic games. For a VGA card to work you must have the third BIOS revision dated 10/27/82, and the two video DIP switches (5 & 6) must be set to ON. - 'BIOS expansion ROM' functionality did not exist at this time. IBM was conservative with expansion slots, whereas the Apple II had seven available slots, IBM only allowed for five, and at least one is always taken by a video adapter whereas Apple had its circuitry built in. ё1736 (1 FD, monochrome monitor, U.K., 1983) IBM 5150. PC - Model 5150. View Full Version : IBM PC 5150 memory expansion card issues please help. Cassette interfaces were popular in less expensive home computers. Hey guys its me again and I need more help with my 5150. Replacing the Intel 8088 with an NEC V20 can make some previously incompatible VGA cards work just fine. NAME . They involved an externally powered hard drive, and custom boot floppy.