30 lines
494 B
ArmAsm
30 lines
494 B
ArmAsm
.sect .text; .sect .rom; .sect .data; .sect .bss
|
|
.define .csa4
|
|
|
|
.sect .text
|
|
.csa4:
|
|
! bx, descriptor address
|
|
! ax, dx: index
|
|
mov cx,(bx) ! default
|
|
sub ax,2(bx)
|
|
! ignore high order word; if non-zero, the
|
|
! case descriptor would not fit anyway
|
|
cmp ax,6(bx)
|
|
ja 1f
|
|
2:
|
|
sal ax,#1
|
|
add bx,ax
|
|
mov bx,10(bx)
|
|
test bx,bx
|
|
jnz 2f
|
|
1:
|
|
mov bx,cx
|
|
test bx,bx
|
|
jnz 2f
|
|
ECASE = 20
|
|
.extern .fat
|
|
mov ax,#ECASE
|
|
push ax
|
|
jmp .fat
|
|
2:
|
|
jmp (bx)
|