A82: help

To: assembly <assembly-82@lists.ticalc.org>
Subject: A82: help
From: The Weilers <bweiler@wworld.com>
Date: Sat, 14 Mar 1998 08:33:13 -0800
Delivered-To: assembly-82-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-82@lists.ticalc.org


I'm almost done with my program.  When I compiled it, it goes okay for a
bit, then it has about 3 straight lines (no pixels I think, just lines)
and they chase each other down the screen. It then locks up. I think the
problem must be here somewhere:

NewCityorKeep
 ROM_CALL(CLEARLCD)
 call set
 ld hl,0
 ld (CURSOR_ROW),hl
 ld hl,ANewCity
 ROM_CALL(D_ZT_STR)
 call reset
 ld a,(menu)
 or a
 call z,set
 ld hl,Yes
 ld a,1
 ld (CURSOR_ROW),a
 ld a,0
 ld (CURSOR_COL),a
 ROM_CALL(D_ZT_STR)
 call reset
 ld a,(menu)
 cp 1
 call z,set
 ld hl,No
 ld a,2
 ld (CURSOR_ROW),a
 ROM_CALL(D_ZT_STR)
 ROM_CALL(KEY_HAND)
 res 4,(IY+09)
 cp K_UP
 call z,newcityyes
 cp K_DOWN
 call z,newcityno
 cp K_MODE
 jr z,Nextpart
 cp K_CLEAR
 ret z
 jr NewCityorKeep
Nextpart
 ROM_CALL(CLEARLCD)
 ld a,(menu)
 or a
 call z,GetANewCity

The other routines it uses are:
set:
 set 3,(IY+05)
 ret
reset
 res 3,(IY+05)
 ret

newcityyes
 ld a,0
 ld (menu),a
 ret
newcityno
 ld a,1
 ld (menu),a
 ret
 
It does what it is supposed to do, a Little Dude type screen, except for
that little bug.  What is wrong?

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