[A83] Re: rst disassembling

To: assembly-83@lists.ticalc.org
Subject: [A83] Re: rst disassembling
From: Peter-Martijn Kuipers <hyper@hysoft-automation.com>
Date: Sat, 25 Aug 2001 09:55:37 +0200 (CEST)
In-Reply-To: <F44CR9tTTCryy1zIR1Y00011841@hotmail.com> from "The one and only SUCKER ..." at Aug 25, 2001 07:39:55 AM
Reply-To: assembly-83@lists.ticalc.org


Ehm, you know that you can only rst 00,08,10,18,20,28,30,28, don't you...

But, if the code's (like the _ldhlind) code 's in the rst area, you can call
it. (call 0033h)

> So whenever I need to do something and it is inside the rst's
> I better just rst that area of code the, there is allways
> a ret.
> 
>    SUCKER
> 
> >It isn't useless. TI put very small routines in there. The most common one 
> >is _ldHLind at 0033h.
> >
> >
> > > ----------------------------------------
> > > From: The one and only SUCKER ... <sucker_pvn@hotmail.com>
> > > Sent: Fri Aug 24 19:51:20 GMT+02:00 2001
> > > To: <assembly-83@lists.ticalc.org>
> > > Subject: [A83] rst disassembling
> > >
> > >
> > >
> > > By disassembling from 00 to 60h I came up to this.
> > > But... with every rst they use jp instead of call, so the code
> > > afterwards in the same label isn't executed and is useless,
> > > isn't it????
> > >
> > >    SUCKER
> > >
> > > ;-----> RST Routines
> > > ; These are the routines associated with the instructions rst 00h to rst 
> >38h
> > > ; rst	00h - Restart
> > > ; rst	08h - call _op1toop2
> > > ; rst	10h - call _findSym (non-program/list)
> > > ; rst	18h - call _pushop1
> > > ; rst	20h - call _hltoop1 (copy 9 bytes from (hl) to op1)
> > > ; rst	28h - call _fpmult
> > > ; rst	30h - call _fpadd
> > > ; rst	38h - call the standard interrupt routine
> > >
> > >
> > > rst 00h:
> > >      jp   0017Dh
> > >      rst  38h
> > >      rst  38h
> > >      rst  38h
> > >      rst  38h
> > >      rst  38h
> > > rst 08h:
> > >      jp   019E4h
> > >      bit  0, (iy+07h)
> > >      ret
> > > rst 10h:
> > >      jp   0224Ch
> > >      bit  4, (iy+02h)
> > >      ret
> > > rst 18h:
> > >      jp   029BEh
> > >      set  0, (iy+03h)
> > >      ret
> > > rst 20h:
> > >      jp   01AB6h
> > >      ld   a, (0913Ch)
> > >      or   a
> > >      ret
> > > rst 28h:
> > >      jp   009C2h
> > >      sub  a
> > >      ld   (0913Ch), a
> > >      ret
> > > rst 30h:
> > >      jp   008D5h
> > >      ld   a, (hl)
> > >      inc  hl
> > >      ld   h, (hl)
> > >      ld   l, a
> > >      ret
> > > rst 38h:
> > >      ex   af, af'
> > >      exx
> > >      in   a, (03h)
> > >      bit  2, a
> > >      jp   nz, 00B1h
> > >      rra
> > >      jr   c, Label2
> > >      rra
> > >      jr   c, Label3
> > >      jr   Label4
> > >      out  (03h), a
> > >
> > > Label4:
> > >      ld   a, 0Bh
> > >      bit  0, (iy+16h)
> > >      jr   z, Label5
> > >      add  a, 04h
> > >
> > > Label5:
> > >      out  (03h), a
> > >      ex   af, af'
> > >      exx
> > >      ei
> > >      reti
> > >      bit  1, (iy+03h)
> > >      (and so on...)
> > >
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> 
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References:

[A83] Re: rst disassembling

From: "The one and only SUCKER ..." <sucker_pvn@hotmail.com>