kickc/src/main/fragment/mos6502-common/pwuc1_derefidx_vbuz1=pwuc1_derefidx_vbuz1_minus_vwuz2.asm

ldy {z1}
lda {c1},y
sec
sbc {z2}
sta {c1},y
lda {c1}+1,y
sbc {z2}+1
sta {c1}+1,y