Compuprint 10200 Programmer Manual Manual de usuario descargar pdf (Pagina 67)

Commands

ESC =

Defines downloaded characters. (IBM)

ASCII Code ESC =

m id p t

Hexadecimal Value 1B 3D

m id p t

Decimal Value 27 61

m id p t

This sequence allows you to design and then down-line load special characters not present in the

character set in use. Whenever you would like to start the DLL setting procedure, proceed as

follows:

• Copy the character generator in ROM into RAM

• Select the DLL generator

There are 256 entries of 9 bytes that compose the look up table of a character generator. One

entry describes one character as follows:

Byte 1, 2 The absolute address of the character definition.

Byte 3 :

- Bit 7 1: indicates that the character is a graphic character (connects at 6 lpi)

0: indicates that the character is an alphanumerical character

- Bit 6 0: indicates a DLL character

1: indicates a resident character

- Bit 5 to 0 These 6 bits indicate the effective number of dot columns of the character shape

stored in memory.

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 233 234

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Compuprint 10200 Programmer Manual Manual de usuario Pagina 67