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- Newsgroups: comp.sys.hp48
- Path: sparky!uunet!gatech!paladin.american.edu!news.univie.ac.at!hp4at!mcsun!chsun!bernina!wachter
- From: wachter@iis.ethz.ch (Georges Leopold Camille Wachter)
- Subject: Re: HP28 speedup woes
- Message-ID: <wachter.720974529@tardis62>
- Sender: news@bernina.ethz.ch (USENET News System)
- Organization: Swiss Federal Institute of Technology (ETH), Zurich, CH
- References: <4210@sicsun.epfl.ch>
- Date: Thu, 5 Nov 1992 14:42:09 GMT
- Lines: 54
-
- duval@elpp1.epfl.ch (Basil P. Duval EPFL - CRPP 1015 Lausanne CH) writes:
- >[...]
- > Now, I have never myself used an HP28 and was wondering if anybody out
- >there not only knows how to up the internal clock rate to 2Mhz but could
- >also give instructions as to how the program is entered on this machine
- >[...]
-
- Well This is a question that comes up at least every 6 months (Why isn't it in
- the faq ?). As this question is of more general interest and as the
- fast-program is one of the most useful programs for the hp28 I'll repost
- an article I've already posted in Dec 91 :
- ==========================
-
- Here is the code of the program :
- 0001 00000 assCode EQU #20C96
- 0002 00000 saver EQU #05081
- 0003 00000 restore EQU #050B8
- 0004 00000 69C20 CON(5) assCode
- 0005 00005 B2000 start CON(5) (end)-start
- 0006 0000A 8F18050 GOSBVL saver
- 0007 00011 30F LC(1) #F Speed
- 0008 00014 1F00FFF D1=(5) #FFF00 Speed adress
- 0009 0001B 15D0 DAT1=C 1
- 0010 0001F 8F8B050 GOSBVL restore
- 0011 00026 142 A=DAT0 A
- 0012 00029 164 D0=D0+ 5
- 0013 0002C 808C PC=(A)
- 0014 00030 end
- 0015 00030
-
- You may enter it with an assembler or -- The simplest way -- by typing the
- following sequence:
- #5081F80002B02C96h
- #80D51FFF00F1F030h
- #C808461241050B8Fh
- #3B82h SYSEVAL
- #3B82h SYSEVAL
- #3CEAAh SYSEVAL
-
- You'll get a 'System Object', that you can store as 'FAST'
- Just execute FAST each time you want to boost your machine.Remember that the
- effect stops when you press ON/ATTN and that the hp needs more energy if it runs
- in fast mode.
- This version of the 'fast' program has been written 2 years ago by
- Philippe Colbach (colbach@nessie.cs.id.ethz.ch)
- Roland Boes
- Georges Wachter (wachter@iis.ethz.ch)
- ============================
- Good luck and enjoy the speed of your machine!
- --
- Georges Wachter EE Student Swiss Federal Institute of Technology
- Snail-mail1 : 74,rue due Travail L-2625 LUXEMBOURG ; voice : 433118
- Snail-mail2 : Haldenbachstr,21 CH-8006 ZUERICH ; voice : 01 - 2521480
- E- mail : wachter@iis.ethz.ch
-