Logical pixels

Multiply the number of physical horizontal pixels (or the number of horizontal characters) by 2 repeatedly until you get a value that is &400 or greater. This is the number of horizontal logical pixels.

Similarly, multiply the number of physical vertical pixels (or the number of character rows) by 2 repeatedly until you get a value that is &300 or greater. This is the number of vertical logical pixels.

This gives the following screen sizes:

Horizontal
Chars    Pixels     Points      Double until >=&400
 10      80 &050   1280 &500    &050 &0A0 &140 &280 &500
 20     160 &0A0   1280 &500    &0A0 &140 &280 &500
 32     256 &100   1024 &400    &100 &200 &400
 40     320 &140   1280 &500    &140 &280 &500
 60     480 &1E0   1920 &780    &1E0 &3C0 &780
 64     512 &200   1024 &400    &200 &400
 80     640 &280   1280 &500    &280 &500
 96     768 &300   1536 &600    &300 &600
100     800 &320   1600 &640    &320 &640
112     896 &380   1792 &700    &380 &700
120     960 &3C0   1920 &780    &3C0 &780
128    1024 &400   1024 &400    &400
140    1120 &460   1120 &460    &460
160    1280 &500   1280 &500    &500
170    1360 &550   1360 &550    &550
192    1536 &600   1536 &600    &600

Vertical
Chars    Pixels     Points      Double until >=&300
 24     192 &0C0    768 &300    &0C0 &180 &300
 25     200 &0C8    800 &3C0    &0C8 &190 &320
 32     256 &100   1024 &400    &100 &200 &400
 44     352 &160   1408 &580    &160 &2C0 &580
 45     360 &168   1440 &5A0    &168 &2D0 &5A0
 75     600 &258   1200 &4B0    &258 &4B0
 90     720 &2D0   1440 &5A0    &2D0 &5A0

Chars Physical  Logical
10x32   80x512  1280x1024 (&500x&400)
20x32  160x512  1280x1024 (&500x&400)
40x32  320x512  1280x1024 (&500x&400)
80x32  640x512  1280x1024 (&500x&400)

32x24  256x768  1024x768  (&400x&300)
64x24  512x768  1024x768  (&400x&300)

112x44          1792x1408 (&700x&580)

Jgharston (talk) 23:08, 16 June 2016 (UTC)