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push bp
mov bp, sp
; push zero onto the stack and pop it into flags.
; some bits won't change
xor ax,ax
push ax
popf
pushf
pop ax
and ax, 0xf000 ;0f000h
cmp ax, 0xf000 ;0f000h
je lessthantwoeightsix
; marked as 286 (2)
mov dl, 2
mov ax, 0x7000 ;7000h
push ax
popf
pushf
pop ax
and ax, 0x7000 ;7000h
jz alldone
; mark as 386 (3)
inc dl
jmp alldone
lessthantwoeightsix:
mov dl, 1
mov al, 0xff ;0ffh
mov cl, 0x21 ;21h
shr al, cl
; if the shift leaves zero, it's a 8088 class cpu, else 80186/88
jnz alldone
; Lets see if we have a V20/V30 (V)
mov dl, 0x56 ;056h
sti
push si
mov si, 0
mov cx, 0xffff ;0ffffh
;rep lods [BYTE PTR es:si]
rep lodsb
pop si
or cx, cx
jz alldone
; mark as a 8088/8086 (0)
mov dl, 0
alldone:
; store in ax
xor dh, dh
mov di, [bp]+6
mov [di], dx
pop bp
retf 2
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