IBM 04N7322 - Video Memory Modes; Factory Preset Timing Signal Chart

Video Memory Modes
Factory Preset Timing Signal Chart
A11
Video
Sync
B
A
C
F
D
E
H
O
R
I
Z
O
N
T
A
L
V
E
R
T
I
C
A
L
Mode1 Mode2 Mode3 Mode4 Mode5
Polarity - - - + -
Frequency kHz 31.47 37.5 43.3 46.875 48.36
Total Period uS 31.78 26.667 23.111 21.333 20.677 E
Data Period uS 25.422 20.317 17.778 16.162 15.754 A
Blanking uS 6.356 6.349 5.333 5.172 4.923 B
Front Porch uS 0.636 0.508 1.556 0.323 0.369 C
Pulse Width uS 3.813 2.032 1.556 1.616 2.092 D
Back Porch uS 1.907 3.810 2.222 3.232 2.462 F
Polarity + - - + -
Frequency Hz 59.94 75.0 85.0 75.0 60.0
Total Period mS 16.683 13.333 11.764 13.333 16.666 E
Data Period mS 15.253 12.800 11.093 12.80 15.880 A
Blanking mS 1.430 0.533 0.670 0.533 0.786 B
Front Porch mS 0.318 0.027 0.023 0.021 0.062 C
Pulse Width mS 0.064 0.080 0.069 0.064 0.124 D
Back Porch mS 1.049 0.427 0.578 0.448 0.600 F
Resolution
640 640 640 800 1024
x
480
x
480
x
480
x
600
x
768
Recall YES YES YES YES YES
3828TUO032A-1 99.5.31 1:35 PM ˘`A11