A83: Re: jump table

To: "Randy Williams" <r_r_williams@yahoo.com>
Subject: A83: Re: jump table
From: "David Phillips" <david@acz.org>
Date: Tue, 16 May 2000 14:33:55 -0600
Cc: <assembly-83@lists.ticalc.org>
References: <20000513233627.22680.qmail@web513.mail.yahoo.com>
Reply-To: assembly-83@lists.ticalc.org


; jump to the label number stored in A (i.e. 0 == Label1)
 ld h,0
 ld l,a
 add hl,hl      ; labels are two bytes, multiply by two
 ld de,JumpTable
 add hl,de    ; add to the start address of the jump table
 ld a,(hl)      ; next four instructions = ld hl,(hl)
 inc hl
 ld h,(hl)
 ld l,a
 jp (hl)        ; jump to the address stored in HL, not really (HL)

JumpTable:
 .dw Label1, Label2, Label3


> can you pls send me an example of a jump tavble
> thanks in advance

References:

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