Routines
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46962: Read Dictionary High Nibble
Used by the routine at ProcessLocationDisplay.
Reads the high nibble of the dictionary byte at the token's index.
Input
D Character code
Output
A Attribute value (bits 4-7)
ReadDictionaryHighNibble 46962 LD HL,23999 Take the dictionary index.
46965 LD A,D
46966 AND %00001111 Keep the dictionary page (the low nibble of the token's high byte) as the high byte of the index.
46968 LD D,A Store the result in the high byte of the source.
46969 ADD HL,DE Add the token offset in DE to the dictionary base.
46970 LD A,(HL) Read the dictionary byte this index points at.
46971 AND %11110000 Keep the high nibble of the dictionary byte, which is the attribute value.
46973 RET Return.
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