; routine: jbcd2bn ; author: Bridger Mitchell & Howard Goldstein ; date: 4/16/1988 ; ; BCD to Binary digit routine. ; ; >> A in bcd ; << A in binary ; ; uses d,e, a ENTRY JBCD2BN CSEG ; JBCD2BN: push de ld d,a ;save orig in d and 0F0h ld e,a ;save hi nyb in e ld a,d ;recover orig and a,0Fh ;get low nyb srl e ;*8hi nyb add a,e ; + 8*hi nyb srl e ;*4 srl e ;*2 add a,e ;+ 2*hi nyb pop de ret ;