Skool Daze: Routine at B371

B371: Prepare a message in the message graphic buffer (2)

Continues from B272. Generates the graphic data for the text of the message and centres it in the buffer at 5B00.

Input
C	0xFE
DE	Message address

B371

CALL $AEE8

Slide the message text into the graphic buffer

B374

SRL C

Halve the number of remaining pixel columns and add one

B376

INC C

B377

XOR A

Insert this number of blank pixel columns, thus centring the message

B378

CALL $ADE8

B37B

DEC C

B37C

JR NZ,$B377

B37E

RET