These are the SCON, TMOD, and TCON:

Transmission:
MOV 89H, #00010000B ; TMOD Timer 1
MOV 88H, #01000000B ; TCON
MOV 98H, #00001000B ; SCON 8-bit shift mode 1

receive:
MOV 89H, #00010000B ; TMOD Timer 1
MOV 88H, #01000000B ; TCON
MOV 98H, #00001000B ; SCON 8-bit shift mode 1

Prams