Star Micronics LC24-20 user manual Download Character Commands, Define download characters

DOWNLOAD CHARACTER COMMANDS

Define download characters

Mode	ASCII				Decimal			Hexadecimal
	<ESC> “’&” <0>			/1I	27 38	0 /?/		IB	26 00 n/
std.	,,~	nil	ml	n12	d mo n7/		nd	n2	mo	tnl	nd
		dl	u	d.!	dl	d2	,.. [!.1”		cl]	(I2	(1.1”

Defines one or more new characters and stores them in RAM for later use. EDS switch A-3 must be set OFF: otherwise RAM is used as an input buffer, not downloading characters, and this command is ignored.

n/ is the character code of the first character defined and n2 is the character code of the last character defined. n/ must be equal to or less than }?2.

The data for each character start with three bytes specifying propor- tional spacing attributes: the first byte, mO,specifies the left of the character: the second byte, ml, specifies the character width: the third byte, n?2, specifies the right of the character.

These values must not exceed the following maximum limits:

Character mode	nll	mo + ml i- n12
Draft	9	12
LQ pica	31	36	I
LQ elite	2’7	30
LQ semi-condensed	21	24
LQ proportional	37	42
Draft super/subscript	7	12
LQ super/subscript	19	36
LQ prop. super/subscript	37	42

Next comes the dot data. Normal character height is 24 dots, so there must be 3 x mf bytes of dot data. If the printer is in super/subscript mode, however, the character height is 16dots, so there must be 2 x ml bytes of dot data.

Each data byte indicates eight vertical dots, with the most significant bit being the top dot, and the least significant bit being the bottom dot.