Difference between revisions of "83Plus:BCALLs:450A"

Revision as of 12:49, 9 September 2006

Synopsis

Official Name: PutS

BCALL Address: 450A

Displays a string on the screen in the large font.

Inputs

• (curRow, curCol): Position on screen of first character
• HL: Zero-terminated string

Outputs

• String displayed on screen
• HL points to character after terminating zero of string

Destroys

None

Comments

Since HL points to the character after the terminating zero of the string when the call is finished, you can put multiple strings in a row and display them all with calls to PutS. See the example.

Example

ld hl,0
ld (curRow),hl
ld hl,string1
BCALL(PutS)
BCALL(PutS) ;hl points to string2 at this point
BCALL(PutS) ;hl points to string3 at this point
ret

string1: .db "This is a string  ",0
string2: .db "This is another string  ",0
string3: .db "Yet another string...",0

All three strings will be displayed in order, starting from the top-left corner of the screen.