TheIBM 5151 is a 12"transistor–transistor logic (TTL)monochrome monitor, shipped with the originalIBM Personal Computer for use with the IBMMonochrome Display Adapter.[1][2][3][4][5] A few other cards were designed to work with it, such as theHercules 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 differentpin 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 theP39 phosphor type, producing a bright green monochrome image intended for displaying high-resolution text.[8][6] This phosphor has high persistence, which decreasesdisplay flicker but causes smearing when the image changes.[9][10]
| 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(5.44311 kg )[8] |
| Heat output | 95.2 W[8] |
| H-freq | 18.432 kHz[8] |
| V-freq | 50 Hz[8] |
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