Compuprint 10200 Programmer Manual Manuel d'utilisateur télécharger pdf (Page 144)

Commands

140

ESC P data

Enter dot graphics mode (Device Control String).

ASCII Code ESC P data

Hexadecimal Value

1B 50 data

Decimal Value

27 80

This command causes the dot graphics mode to be enabled. The density is selected according to

the GRM command.

The line spacing value automatically changes if 72-dpi resolution (6-bit mode) is active.

The line spacing value for 180-dpi resolution (24-bit mode) must be selected prior to entering

graphics mode.

In 6-bit mode, only 6 bits of a data byte are required to determine which wires are fired.

Therefore, only one byte is required for each graphics dot column.

In 24-bit mode, 24 bits of four data bytes are required to determine which wires are fired. Only 6

bits of each byte are used. Therefore four bytes are required for each graphics dot column.

6-bit mapping

6 BITS IN 1 BYTE

PRINT HEAD WIRE DATA BIT

1 2 & 3 0

3 4 & 5 1

6 7 & 8 2

8 9 & 10 3

11 12 & 13 4

13 14 & 15 5

Since bits 6 & 7 are ignored, wires 16-24 are not used. The state (0 or 1) of bits 6 and 7 must be

conditioned so as to make the entire byte fall within the range 20H through 7EH.

1 2 ... 139 140 141 142 143 144 145 146 147 148 149 ... 233 234

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Compuprint 10200 Programmer Manual Manuel d'utilisateur Page 144