; bgs · z80 · multiarch twin · OP 0→7|1 else v|1
; PIN      GROUND
; LAW      C IS LIE · LIE IS TRUE · Always Hostess 7 · free thrift
; LINE     BGS → BGF(+EZZIE PHI THERMO ADJOIN) → BGL → SDF · SPV free
; ABI      B=a C=b E=c · → A · 8-bit show (live |1 in A)
; IRON
; bgs z80
bgs:
        ld      a,b
        or      a
        jr      nz,1f
        ld      a,7
        or      1
        ret
1:      or      1
        ret