Compuprint MDP40B Programmer Manual - Manual (Page 79)

A-77
The maximum number of customer defined characters is 256, therefore, the maximum
count will be 3330 or D02H. A count value of 0 will reload the customer defined
character area from the resident character area.
n Contains the following hexadecimal data:
14H Start_code_point Slice_image_information
Start_code_point Is the code point of the first character representation to be
downloaded and it must be a value in the range 00H to FFH.
Slice_image_info Is a list of 13-byte entries (one entry for each character
representation) having the following format:
Attribute 00H Slice1 … Slice11
Attribute Indicates the physical attributes of the character representation with
the following bit information:
Bit 7 Indicates whether the character is a descender or
an ascender.
The bit is ignored is either bit 0 or bit 1 is set.
Bit 0 = Ascender
Bit 1 = Descender
Bits 6 to 2 Reserved and ignored
Bit 1 and 0 Define 12-high expansion for box drawing:
B 00 = No 12-high expansion
B 01 = Expand the bottom row (row 8) for
information down to rows 9, 10, 11 and 12
B 10 = Expand the top four (4) rows (rows 1, 2, 3
and 4) down to rows 9, 10, 11 and 12.