****************************************

* Convert hex byte to 2 hex digits

* OTHER MODULES REQUIRED: none

* ENTRY: B= value to convert

* EXIT: D=2 byte hex digits


 nam Convert Byte to Hex
 ttl Assembler Library Module

 psect BIN2HEX,0,0,0,0,0

BIN2HEX:
 pshs b
 lsrb get msn
 lsrb
 lsrb
 lsrb fall through to convert msn and return
 bsr ToHex
 tfr b,a 1st digit in A
 puls b get lsn
 andb #%00001111 keep msn

ToHex
 addb #'0 convert to ascii
 cmpb #'9
 bls ToHex1
 addb #7 convert plus 9 to A..F
ToHex1
 rts

 endsect