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