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- Getting String Input
- ==============================================================
- by Linus Akesson
-
- First of all, we put a prompt at 821ch. Max 16 chars.
-
- ld de,821ch ;put the prompt here
- ld hl,prompt
- ld bc,prompt_len ;length of prompt, max = 16
- ldir
-
- Then we call PGMIO_EXEC with the String Input command.
-
- ld a,0 ;code for STRING input
- ld (ASM_IND_CALL),a
-
- call PGMIO_EXEC ;defined in squish.inc
-
- Now OP1 contains the name of a temporary string variable. The string contains
- tokens, but if you're only interested in alphanumeric input that doesn't
- matter, because uppercase letters and digits are still ascii.
-
- This routine is an example of how to display the string without checking for
- tokens line sin(.
-
- call _CHKFINDSYM
-
- ex de,hl ;hl is start of string data
- ld c,(hl)
- inc hl
- ld b,(hl)
- inc hl ;bc is length of string
-
- ld a,b
- or c ;length = 0 ?
- ret z ;return if so
-
- loop:
- push bc
- ld a,(hl) ;get a character
- call _putc
- pop bc
- dec bc
- ld a,b
- or c ;done yet?
- jr nz,loop ;no -> loop back
-
- call _newline
- ret
-
- And ofcourse:
-
- prompt: .db "Inp:",0
- prompt_len = $-prompt