; 17B weird line pattern ; Really wanted this to be 16B :( ; zero page locations GBASL = $26 GBASH = $27 HGR_SCALE = $E7 HGR_COLLISIONS = $EA ; ROM locations HGR2 = $F3D8 HPOSN = $F411 XDRAW0 = $F65D XDRAW1 = $F661 HPLOT0 = $F457 RESTORE2 = $FF42 agony17: ; we load at zero page $E7 which is HGR_SCALE ; this means the scale is $20 (JSR) jsr HGR2 ; Hi-res, full screen ; 3 ; Y=0, A=0 after this call ; A and Y are 0 here. ; X is left behind by the boot process? ; set GBASL/GBASH ; we really have to call this, otherwise it won't run ; on some real hardware depending on setup of zero page at boot jsr HPLOT0 ; jsr HPOSN ; set screen position to X= (y,x) Y=(a) ; saves X,Y,A to zero page ; after Y= orig X/7 ; A and X are ?? tiny_loop: lda #$E2 tax tay ; ldx #$E2 ; ldy #$E2 ; lda #2 ; ROT=2 jsr XDRAW0 ; XDRAW 1 AT X,Y ; Both A and X are 0 at exit ; Z flag set on exit ; Y varies beq tiny_loop ; bra