Epson FX-80 Operation Manual page 156

ESC Y/ESC Z
ESC V
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ESC Y - Double-speed, Dual-density Bit Image Mode
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CHR$(27); "y" ;CHR$(n,);CHR$(n2);
CHR$(d 1 );CHR$(d z );. . .CHR$(Dn11 nz) . . Bit-image data
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Sets Double speed, Dual-density bit image mode. The maximum
number of bit-image data per line is 960 (FX-80), 1,632 (FX-100).
When Dual-density bit image mode (ESC L) is entered, the print
speed decreases from the normal 16 IPS to 8 IPS (inch per second).
If the ESC Y code is used, however, normal print speed is enabled
and bit-image data of 960-position/line (FX-80) or 1,632-position/line
(FX-lOO) is printed out.
Horizontally adjacent dots cannot be printed. For the procedure to
obtain n1 and n2, refer to the description of the ESC K code.
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ESC K, ESC L, ESC Z, ESC
*
and ESC ?
ESC Z
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ESC Z - Quadruple-density Bit Image Mode
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CHR$(27);"Z" ;CHR$(n,);CHR$(n2);
CHR$(d 1 );CHR$(d z );. . .CHR$(Dn11 nz) . . Bit-image data
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Sets Quadruple-density bit image mode. The minimum number of
bit-image data per line is 1,920 (FX-80), or 3,264 (FX-lOO).
When this code is input, the printer performs quadruple-density bit
image printing. Horizontally adjacent dots cannot be printed in this
mode.
For the procedure to obtain the values of n1 and n2, refer to ESC K.
The print speed is 8 IPS (inch per second), the same as that of
Dual-density bit image mode (ESC L).
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ESC K, ESC L, ESC Y, ESC
*
and ESC ?
3-105