A83: Re: Divide HL by DE

A83: Re: Divide HL by DE

• To: <assembly-83@lists.ticalc.org>
• Subject: A83: Re: Divide HL by DE
• From: "David Phillips" <david@acz.org>
• Date: Wed, 8 Mar 2000 17:00:23 -0800
• References: <27.2b45501.25f82062@aol.com>
• Reply-To: assembly-83@lists.ticalc.org

I think this routine is by Dux Gregis.  It divides DE by C.  There's one by
Jimmy Mardell that does full 16 bit signed division if you need more than
this:

Divide:
 xor a
 ld b,16  ;16 shifts
@dloop:
 sla e
 rl d    ;shift DE left
 rla    ;into A
 cp c    ;if A<=C
 jr c,skip
 sub c   ;then A= A-C
 inc e   ;set bit 0
@skip:
 dec b
 jr nz,@dloop
 ret


> Does anyone have a simple routine to divide HL by DE on the 83+?  Speed is
> more important than size in this case.

• A83: Re: Re: Divide HL by DE
• From: "James Matthews" <jjj@matthewsfamily.fsnet.co.uk>

• A83: Divide HL by DE
• From: RalphieMSc@aol.com

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