IBM 5151

An IBM PC with a 5151 monitor

The IBM 5151 is a 12" transistor–transistor logic (TTL) monochrome monitor, shipped with the original IBM Personal Computer for use with the IBM Monochrome Display Adapter.[1][2][3][4][5] A few other cards were designed to work with it, such as the Hercules Graphics Card.

The monitor has an 11.5-inch wide CRT (measured diagonally) with 90 degree deflection, etched to reduce glare, with a resolution of 350 horizontal lines and a 50 Hz refresh rate.[3][4][6] It uses TTL digital inputs through a 9-pin D-shell connector, being able to display at least three brightness levels, according to the different pin 6 and 7 signals.[7] It is also plugged into the female AC port on the IBM PC power supply, and thus did not have a power switch of its own.

The IBM 5151 uses the P39 phosphor type, producing a bright green monochrome image intended for displaying high-resolution text.[8][6] This phosphor has high persistence, which decreases display flicker but causes smearing when the image changes.[9][10]

## Specifications

[edit]

Type  | Digital, TTL[8]

|

Resolution  | 720 x 350
Size  | 11 in × 15 in × 14 in (280 mm × 380 mm × 360 mm) (H×W×D)[8]
Weight  | 12.5 lbs[8]
Heat output  | 95.2 W[8]
H-freq  | 18.432 kHz[8]
V-freq  | 50 Hz[8]

## References

[edit]

1. ^ "The IBM XT LIVES!!". Forbes.com. Archived from the original on 2001-07-12. Retrieved 2008-11-16.
2. ^ "IBM 5151-02 computer monitor, 1983 | Science Museum Group Collection". collection.sciencemuseumgroup.org.uk. Retrieved 2022-11-17.
3. ^ a b Farquhar, Dave (2021-08-31). "First generation IBM PC monitors". The Silicon Underground. Retrieved 2022-11-17.
4. ^ a b "IBM 5151 Personal Computer Display - Peripheral - Computing History". www.computinghistory.org.uk. Retrieved 2022-11-17.
5. ^ IBM 5151 Personal Computer monitor. 1981.
6. ^ a b Personal Computer Hardware Reference Library - IBM Monochrome Display (5151) (PDF). IBM.
7. ^ "minuszerodegrees.net". www.minuszerodegrees.net. Retrieved 2022-11-17.
8. ^ a b c d e f g IBM Monochrome Display user manual
9. ^ Bottles full of nothing, by Steve Gibson, InfoWorld, 11 Jun 1984
10. ^ By (2022-01-03). "Matrix Digital Rain On The IBM PC With A High Persistence Monitor". Hackaday. Retrieved 2022-11-17.

## External links

[edit]

* Picture of IBM 5151 display in operation (PC Shell shown on screen)

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