IBM 560 - Manual (Page 122)

Installation Check
Assembler Language: Real Mode
;
; FindSmapi
; -----------
;
;
On Entry : None
; On Exit : CF = .. Find out
; DX - Segment
; BX - Pointer to Header
;
;
CF = 1 .. No Smapi BIOS
;
FindSmapi Proc Near
push eax
push cx
push si
push ds
mov ax, BIOS_SEG ; F Segment
mov ds, ax
mov bx, ; Start Point
mov cx, SMB_CAND_CNT ; Total Check Count
mov eax, 'BMS$' ; Target Strings
@@:
cmp eax, dword ptr ds:[bx].@SMBHDR_SIG
je short @f
add bx, 1 h ; Next Paragraph
loop @b
stc
jmp short FindSmapiFin
A-58 ThinkPad 560/560E SMAPI BIOS