Routines
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46382: Print Double Height Text
Used by the routines at RechargeBattery, DisplayMenu and DrawGameScreen.
Prints a string of text that is two characters tall. The string starts with an attribute byte, and its last character has bit 7 set.
Before After
print-double-height-before print-double-height-after
Input
HL Position (H is y, L is x, in pixels)
DE Address of the string
PrintDoubleHeightText 46382 PUSH HL Save the position.
46383 CALL AttributeAddress Find the address of the attributes at that position using AttributeAddress.
46386 LD A,(DE) Fetch the attribute from the start of the string.
46387 INC DE Move on to the first character.
46388 LD C,A Keep the attribute.
46389 LD B,2 The text is two characters tall.
PrintDoubleHeightText_Attributes 46391 PUSH DE Save the pointer to the text.
46392 PUSH HL Save the attribute address.
PrintDoubleHeightText_Attribute 46393 LD (HL),C Colour the current cell.
46394 LD A,(DE) Fetch the next character code.
46395 INC DE Move on.
46396 INC L Move on to the next column.
46397 BIT 7,A Test whether it was the last character of the text.
46399 JR Z,PrintDoubleHeightText_Attribute Loop back until the whole row has been coloured.
46401 POP HL Restore the attribute address.
46402 LD DE,32 Move down to the next row.
46405 ADD HL,DE
46406 POP DE Restore the pointer to the text.
46407 DJNZ PrintDoubleHeightText_Attributes Loop back to colour the second row.
46409 POP HL Restore the position.
46410 CALL ScreenAddress Find the screen address using ScreenAddress.
PrintDoubleHeightText_Character 46413 LD A,(DE) Fetch the next character code.
46414 BIT 7,A Jump to PrintDoubleHeightCharacter to print the last character.
46416 JP NZ,PrintDoubleHeightCharacter
46419 CALL PrintDoubleHeightCharacter Print the character using PrintDoubleHeightCharacter.
46422 JR PrintDoubleHeightText_Character Jump back to print the next character.
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