HDTenEightyP/NetNews huggingface dataset:
From: Arthur_Entlich@amusers.UUCP (Arthur Entlich)
Newsgroups: comp.sys.amiga.hardware
Subject: A2000 power supply
Distribution: world
Date: 22 Dec 92 17:33:49 PST
Organization: AmUsers - The Amiga Users Group of Victoria BC

This message is to Dave Martin (couldn't send him private mail... sorry)
at dkm@col.hp.com
 
Dave,

You mentioned in a recent post that you damaged your A2000 power supply and
had to rebuild it.  I also damaged my A2000 power supply when I plugged it
into my HP LAserjet printer and apparently shorted out my +12/-12 volt
lines from my serial port by accidently using a full wired cable.  I
noticed you might be working at HP and thought maybe you had a similar
problem. 

Anyway, I was wondering if you could tell me what happened to your power
supply (I also damaged my printer... blew a chip wide open on the HP
LAserjet motherboard).  Did you locate a schematic for the A2000 power
supply?
 
If you can be of any assistance in my recent "accident" I would really
appreciate it.
 
 Thanks,

Arthur Entlich



-- Via DLG Pro v0.995

Newsgroups: comp.sys.amiga.hardware
From: aa395@yfn.ysu.edu (Perry Tarantine)
Subject: monitor help
Organization: Youngstown State University/Youngstown Free-Net
Date: Mon, 28 Dec 1992 16:53:27 GMT


Would some technophile help me with a question?
i'm looking for a monitor for my amiga.  what considerations do i need
to make to use an ibm monitor with my amiga.
-- 
Perry Tarantine  aa395  /*/     ///   /*/ Amiga: Computer for the
SysOp of the RPG Sig   /*/     ///   /*/     Creative Mind.
Type "Go RPG" and     /*/  \\\///   /*/ Your mother was a hamster
Join the Adventure   /*/    \XX/   /*/and your father smelt of elderberries
Newsgroups: comp.sys.amiga.hardware
From: loyd@seq.uncwil.edu (David Loyd)
Subject: O.K. all you Techies..What does a green screen mean at startup!
Organization: Univ. of North Carolina @ Wilmington
Date: Tue, 22 Dec 1992 22:08:47 GMT

Just as the title states. I turn on the A2000 and I get a green 
screen and that's all folks. Nothing else. I can take apart
the system and jostle the conections and boards around and that
seems to do the trick for a few days. 

Help me before I get the duct tape out!!!

Thanks

-- 
loyd@seq.uncwil.edu

Amiga 2000 Tower               8megs 32bit Ram   
Supra 2400ZI+ Modem            Sony KV-1311CR Monitor
From: fheitkamp@desire.wright.edu
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Data/Instruction Cache & BURST modes on 68030? Why/when?
Date: 23 Dec 92 20:21:36 EST
Organization:  Wright State University 

In article <72290@cup.portal.com>, Tony-Preston@cup.portal.com (ANTHONY FRANCIS PRESTON) writes:
> |>The 68020 has a single cache for data and instructions, the 68030
> |>has separate ones.  The cache size in this case is 256 bytes.  The
> |>68040 has 4096 byte caches for instruction and for data.

	Minor point:  The '020 has only an instruction cache.  It is
	256 bytes.

Fred Heitkamp,  ** Not an organization **

Newsgroups: comp.sys.amiga.hardware
From: bja20850@uxa.cso.uiuc.edu (B.J. Anderson)
Subject: 4000's KS 3.0 on my 3000???
Summary: How to run my 4000's 3.0 KS on my 3000???
Organization: University of Illinois at Urbana
Date: Wed, 23 Dec 1992 08:52:56 GMT
Keywords: kickstart 4000 3000

I assume it's legal to use an image of my 4000's KS ROM on my 3000
as long as the code only runs on one computer at once, right???

I've got a soft-kick 3000 (ie: uses the devs:kickstart file) so
I was hoping I could just copy the 512k area from $f80000-$ff0000
on my 4000 and put it on my 3000 as devs:kickstart.  Bombs... and
my original devs:kickstart file is longer than 512k so I started
wondering.

Guess I need some "stuff" at $ff0000+ in order to set the system vectors
prior to rebooting into KS 3.0???  Anyone done this work already?  Any
other pointers along these lines.

Email please.  Will post the summary.

-Beej

-- 
mail: bja20850@uxa.cso.uiuc.edu
From: lukec@terapin.com (Luke Chastain)
Newsgroups: comp.sys.amiga.hardware
Subject: A1200???????
Date: 30 Dec 92 12:30:39 PST
Organization: BBS

   I have enough money to buy an A1200 in March but with all the changes in the
Amiga field the question is should I?  I just want to know if I should go ahead
and buy an A1200 or wait.
                                            -Thanx

Newsgroups: comp.sys.amiga.hardware
From: vjh21@cas.org (Vince Herried ext 2877)
Subject: Re: +12v and +5v reversed
Keywords: Brain Dead
Organization: CAS
Date: Mon, 21 Dec 1992 20:29:47 GMT

Check Byte magazine.  I've seen companys advertise HD repair and data
reclaim facilitys.
-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
				 |     Vincent Herried  (614) 447-3600 x 2877
				 |     Chemical Abstracts Service
 _____________________           |     P.O. Box 3012
(_)________________   \          |     Columbus, OH 43210-0012
  ________________|\   \         |
 (_)______________\_\   \        |     Current thought: People who cannot be
   ______________________\       |     understood are geniuses, so management
  (_)____________________|       |     assigns them the toughest projects.
				 |
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
From: lukec@terapin.com (Luke Chastain)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: 1084 FadeOut
Date: 31 Dec 92 16:10:58 PST
Organization: BBS

I have the exact problems and found a solution.....you know that wire that
connects the actual......(what the hell is it called?).........thing that
displays the picture to the rest of my monitor came loose and disconnects the
display thingy (excuse the terminology) and the picture goes.  I haven't got
around to fixing it yet it's at my dads and I am using his 1084S monitor.  Hope
it helps.

Newsgroups: comp.sys.amiga.hardware
From: rap2@vuse.vanderbilt.edu (Alan Peters)
Subject: A4000 price, availablity
Summary: is it available and how much does it cost?
Keywords: Amiga 4000
Organization: Vanderbilt University School of Engineering, Nashville, TN, USA
Distribution: usa  
Date: Thu, 24 Dec 1992 20:46:03 GMT

I have owned an A1000 since early in 1986. It is clearly time to upgrade.
I will buy either a PC clone or an A4000. Cheap PC clones can be had.
It appears they have their own problems with processors outruning antiquated
busses and graphics accelerators being good at windows or DOS but not
both etc. As I wade through the morass of ISA, EISA, VESA VL, VGA, SVGA,
etc (without the benefit of good definitions of what these specs actually
mean), the seamlessly designed A4000 looks very attractive.

For those of you in-the-know, I have a few questions:

1. Is the A4000 available now?

2. What is the street (mailorder?) price?

3. Does the A4000 have a SCSI driver available yet?

4. I have spent a considerable amount of money on software for my A1000.
   (E.g. WordPerfect, Manx C, Superbase, Digiview, DeluxePaint, Logistix,
   etc., etc.) Will any of this work on the A4000? 

5. In general do software companies offer upgrades at reduced prices to 
   registered owners of older versions of their software?

6. Is the A4000 going to be hardware upgradable? That is, when new pro-
   cessors are released or new graphics options are made available,
   how easy will it be to upgrade the A4000? I know that this might be
   impossible to answer. Has CBM indicated anything about the status
   of the A4000 with regard to future hardware development directions?

Thanks in advance!

Alan Peters

--
From: boutwell@beta.tricity.wsu.edu (Scott Boutwell)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: My SupraFax modem
Date: 1 Jan 93 01:47:55 GMT
Article-I.D.: serval.1993Jan1.014755.16114
Organization: Washington State University Tri-Cities, Richland

I just got my Supra 14.4 Fax yesterday and they have H roms in it...  The
J roms have Caller ID in them but I believe that they cost about $20.00 to
upgrade to them...
                         Scott Boutwell
From: Rick_Lang@amusers.UUCP (Rick Lang)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: WB2.1 & Rexxmast
Distribution: world
Date: 29 Dec 92 20:43:03 PST
Organization: AmUsers - The Amiga Users Group of Victoria BC

In a message dated Tue 29 Dec 92  2:47, ross@cbmvax.commodore.com (Ross
Hippely - Manuals) wrote:

 RH-M> Are you saying that, to get ARexx working properly, something other
 RH-M> than
 RH-M> (or in addition to) placing RexxMast in S:User-startup or WBStartup
is
 RH-M> necessary?  If so, could you give some examples?

I execute rexx scripts in my user-startup, so I moved the rexxmast to that
file; if I put rexxmast in WBStartup as has been suggested, it would start
too late.  For example, this sets up my rexx libraries:

/*startrx - adds additional libraries to REXX environment */

lib.0 = 9
lib.1 = 'rexxsupport.library'
lib.2 = 'rexxarplib.library'
lib.3 = 'rexxextra.library'
lib.4 = 'rexxhost.library'
lib.5 = 'rexxmathlib.library'
lib.6 = 'rexxserdev.library'
lib.7 = 'translib.library
lib.8 = 'screenshare.library'
lib.9 = 'mathieeedoubbas.library'

/* trace ?r */
do i=1 to lib.0
  result = addlib(lib.i,0,-30,0)
  if result = 0 then say lib.i "not added
end
exit


 -- AEd V1.37/Eval

-- Via DLG Pro v0.995

-- Rick Lang
   Editor of the AmUser News - the Victoria Amiga User Group Newsletter

E-mail replies use rlang@bcsc02.gov.bc.ca - not the address in this
message!

Newsgroups: comp.sys.amiga.hardware
From: smcgerty@unix1.tcd.ie (Stephen John McGerty)
Subject: Re: A1200/4000 ramblings...
Organization: Trinity College, Dublin
Date: Tue, 22 Dec 1992 23:51:51 GMT

In <bmccnnll.725047559@unix1.tcd.ie> bmccnnll@unix1.tcd.ie (Barry McConnell) writes:

>In <37972@cbmvax.commodore.com> daveh@cbmvax.commodore.com (Dave Haynie) writes:

>>Flicker is largely a matter of opinion, which is probably based on what
>>you're used to.  

>As a European, I never really noticed flicker on my 50Hz monitor until these
>discussions popped up originally several months ago! Now it can sometimes be
>annoying, but you very quickly get used to it

Ever sat in the front row of a cinema? The flicker is _really_ bad.
I hear it's 24 fps, or something silly like that...

Stephen.


......................................................................... 
: / T | /  Stephen John McGerty (C.Sci)  "Theory must never   Amiga  // :
: / | |/   smcgerty@unix1.tcd.ie          precede creation"       \\//  :
:.......................................................................:
From: db562s445@sycom.mi.org (Dave Birdsong)
Newsgroups: comp.sys.amiga.hardware
Subject: ICD's Trifitca
Date: 29 Dec 92 00:44:06 GMT
Organization: Michigan Information eXchange
X-BBS-Software: EXCELSIOR! V0.975

I got one of the New ICD Trificta IDE/SCSI II RAM Controllers yes last week.
I can get the Ram and the SCSI II to work great!! BUT.. the IDE controller 
doesn't seen to work... I have a WEstern Digital 212 meg IDE drive and I can't 
get the system to even boot with a floppy with this drive pluged in.. and if I 
put my 40 meg seagate on it, it will boot from floppy but it can't find the 
drive to format....
BTW.. ICD told me that Western Drives will work with the Trificta unlike the 
AdIDE (and my 212 does work with my adIDE).. has anyone else had this truoble?
OH YEA how many people have called ICD today for Help with the new Christmas 
gifts they got like I did... THEY ARE CLOSED TILL NEXT YEAR!!!  I was really 
ticked when I called today and got a recording saying Call back next Year!!
errrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
any help would be apreiated
Dave Birdsong
Newsgroups: comp.sys.amiga.hardware
From: cobra@coyote.datalog.com (Ken Thompson)
Subject: MultiStart II "Problem"
Organization: Datalog Consulting, Tucson, AZ
Date: Mon, 28 Dec 92 01:51:44 GMT

 Greetings!
 
I've a problem (why else would I be posting here...); wondering if I
could get an answer to my dilemma...
 
While installing a DKB MultiStart II board in my A500 (Rev 6a), I 
figured out that I received the older A500/A2000 version, rather than
the special 6a version.  Other than the fact I can't close up my Amiga
due to mechanical interference (it's too far forward to install the 
RFI shield as well as the top half of the case!), the product *does*
function...
 
What I'd like to know is simple...why the >100% difference in price 
between the A500/A2000 version and the Rev6a version of this device?
 
Does anyone know of an easy method of retrofitting this to be able to
mechanically offset it with, say, a set of DIL jumpers (about 6" looks
like it'd do it real well...even if you had to "dead bug" the ROM's & 
the board itself on the motherboard)?  
 
I may just send the thing back; I bought it only on the recommendation
of the sales droid on the phone at Creative Computers...
 
E-Mailed responses would be appreciated; I may be able to keep up with
the news traffic to read a public reply...all answers will be summarized. 

 
Thanx!
 
 
 Ken Thompson
 cobra@datalog.com
 

           _____         ______________________   _____                
       |/    |          | cobra@datalog.com   |     |        /\        
       |\ en |hompson   | cobra@jab.tus.az.us |     |ucson, /--\rizona 
     ------------------------------------------------------------------
From: henigma@ac.dal.ca
Newsgroups: comp.sys.amiga.hardware
Subject: Help!: Floptical and CDROM installation in A4000!!
Date: 23 Dec 92 16:20:03 -0400
Organization: Dalhousie University, Halifax, Nova Scotia, Canada







    I need help, I'm trying to put a floptical and a CDROM into a 4000, but the
base plate of the floptical does not fit right, and I can't get it to fasten to
the screws.
   Any ideas on this matter a much APPRECIATED!!!!!!!!!!


Xref: sparky comp.sys.amiga.hardware:22171 comp.sys.amiga.emulations:5663
From: peterk@cbmger.de.so.commodore.com (Dr Peter Kittel Germany)
Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga.emulations
Subject: Re: A2286 AT Bridgeboard problems
Date: 29 Dec 92 15:35:50 GMT
Reply-To: peterk@cbmger.de.so.commodore.com (Dr Peter Kittel Germany)
Followup-To: comp.sys.amiga.hardware
Organization: Commodore Germany

[ This may be a little late, but I didn't see any response yet. ]

In article <1992Dec16.230512.7781@qucis.queensu.ca> akerman@qucis.queensu.ca (Richard Akerman) writes:
>I just got a new A2286 AT Bridgeboard and installed it in my Rev. 4 German
>motherboard A2000.  I have Workbench/Kickstart 2.04.  I ran the Amiga
>Janus version 2.1 installer and put everything on SYS: except for a 30 MB
>virtual drive on Work:  At the end of the installation it couldn't start up
>PCPrefs, "Could not open Janus.library".  I added 

Hardware?

>assign LIBS: SYS:Expansion add

No, this is *not* necessary and wouldn't help in any case.

>SysInfo 2.69 reports address $FF000000, 0K, ZORRO II, and XTBRIDGEBOARD or
                                         ^^
>ATBRIDGEBOARD depending on which slot it is and how hard I bang it.

Hmm, don't know about SysInfo, heard mixed stories about it. But a
bridgeboard definitely uses some memory (512 K). So, if this memory 
isn't there, I assume a hardware problem.

>I also have a GVP Series II HC+8 card that works fine.

Perhaps they conflict with one another? Have you already tried it with
this card removed?

>A problem with the bridge connectors???

There is certain probability. Standard procedure:
1. Take bridgeboard out.
2. Press every chip that sits in a socket firmly back into this. If you
   see some chip that sits not exactly aligned in its socket, pull it
   out and insert it again properly.
3. Insert bridgeboard properly into the Amiga.
4. If this did not help: Don't give in too early!!! Try procedure step
   1 to 3 at *least* 5 times before trying other cures...

-- 
Best regards, Dr. Peter Kittel  // E-Mail to \\  Only my personal opinions...
Commodore Frankfurt, Germany  \X/ {uunet|pyramid|rutgers}!cbmvax!cbmger!peterk
Wer's nicht kann, soll's bleiben klopfen oder Steine lassen!
Xref: sparky comp.sys.amiga.hardware:22176 comp.sys.amiga.graphics:8257
From: iguana@nmt.edu (Shawn Clever)
Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga.graphics
Subject: Help!! Infrared Mouse Question!
Keywords: Need Help!!!
Date: 28 Dec 92 19:02:18 GMT
Organization: New Mexico Tech


I hope that one of you amiga control gurus out there will read this and 
be able to help me.  I need information that is not folklore, so if 
you don't know for sure, please state it in your reply.

Ok.  I want to do a presentation with my amiga in which I will be standing
on a stage approximately 50 feet from my machine.  I want to be able to 
control my computer via an infrared mouse or trackball and some sort of
infrared signal-amplifier that will allow me to place my machine up in 
the booth with the projection TV system, while I stand infront of the
crowd on the stage below and control it with the mouse or trackball.

I have been told that since the range of the infrared input devices is 
about 4 feet, I will need an amplifier such as the ones in the DAK and 
DAMARK catalogues to get the range I need.  The only infrared amplifiers
(if that is infact what they are) that I have found in these catalogues
are designed to work with infrared remotes (TV, VCR) and the customer
service people have told me they won't work with an infrared input device
like I want to use.  I have tried calling Alfa-Data (makers of an infrared
mouse and trackball) but they were completely un-helpful since they are 
only a distributor and their product comes from Taiwan. I haven't gotten
ahold of Golden Image yet, but I would suspect their story is the same.

What I want to know is, can this be done?  Has anyone out there attempted
to control their computer from a remote location-- say farther than 15 feet
away?  What type of input device and infrared amplifier are needed?
Or is the only other solution to place the computer on the stage next to me
and run 50 feet of coaxial cable up to the projection TV in the booth?

Please e-mail any replies.  I don't often get to read this newsgroup.

Thanks!

Shawn Clever
New Mexico Tech
(iguana@nmt.edu)
Newsgroups: comp.sys.amiga.hardware
From: easton@zds-oem.zds.com (Jeff Easton)
Subject: Re: Need help choosing a monitor
Organization: Zenith Data Systems, OEM Systems Engineering
Date: Mon, 28 Dec 1992 00:31:48 GMT

In article <00965B64.5911E2C0@LNS62.TN.CORNELL.EDU> CDJ@lns62.tn.cornell.edu writes:
>I wish to get a new monitor and after some research  I have narrowed
>it down to three candidates: NEC 3D, SONY 1302, and C= 1960.
>
>*NOTE: I have found companies which still sell the first two.
>
>I would like for anyone who has used one of these monitors (especially,
>the NEC and SONY) to answer a few questions for me.

  I can answer for the NEC 3d hooked to an A1200...

>1) can it use overscan?

  Yes.  With DblNTSC I can use all the overscan the Amiga gives me.

>2) How quickly does it change between screens of different synch rates?

  Somewhere between .5 and 1 second? (never really timed it, but its
noticable).

>3) How "sharp" is the display?

  Looks reasonable to me.  The specs say its a .28mm dot pitch.

>4) Are the controls easily accessible from the front?

  Yes, behind a swing down door are; Screen up/down, Screen height,
Screen left/right, and Screen width.  These are all digital buttons,
not pots.  Also the contrast and brightness controls are up front
along with the power switch.

  The only weird thing I've noticed is that on the A1200, the DblNTSC
and DblPAL modes need the VGAOnly monitor type as well otherwise it
wont sync correctly.  The A1200 errata sheets mention that the the
VGAOnly monitor type is needed for VGA fixed frequency monitors.
What it apparently does is move the horizontal scan rate from 
27.66kHz to 29.20kHz and the vertical from 58 to 59 Hz.  The Nec
booklet claims it can sync from 15.5 to 38 kHz with 50 to 90 Hz
verticals.  Go figure.

  The Nec 4D I tried, on the other hand, worked fine at 27.66kHz without
the VGAOnly monitor type.  Its rated at 30kHz to 57kHz.  The 15.75kHz mode 
didnt work though.  :-)

>By the way, I talked to my local C= dealer and he heard the new Quad synch
>monitors are going to be inexpensive (~$300) multisynch monitors to be
>used with the A1200.  He wasn't certain so take the info with a grain of
>salt.

>				Chris Jones

-- 
  ___  ___    Jeff Easton             easton@zds-oem.zds.com
 (__  (__     Zenith Data Systems     j.easton@mi04.zds.com
 ___) ___)    Saint Joseph, Mich.     easton@andrews.edu
Monte Carlo   Z-LS/20 - Choice of a quiet generation

Newsgroups: comp.sys.amiga.hardware
From: koren@fc.hp.com (Steve Koren)
Subject: Parallel signal levels
Date: Wed, 30 Dec 1992 04:29:26 GMT
Organization: Hewlett-Packard Fort Collins Site
X-Newsreader: Tin 1.1.3 PL5


Hello,

I'm trying to connect an Amiga 2000 to an HP Laserjet IIIP through a
parallel printer sharing device.  This device has two parallel inputs,
and switches the active one to an output port which goes to the printer.
Here's what happens:

  1) When the device is not used, everything works OK for long and short
     cables. 

  2) When the cable between the Amiga and the device is short (ie, < 5
     ft), everything is OK.

  3) When same cable is long (> 5 ft), printing yields garbage.
     However, using the exact same cables and an MS-DOS machine,
     everything works fine.

It seems that somehow the Amiga is putting out less signal level than
the DOS machine is.  I've heard that parallel cables have a max length
of something like 9 feet, but I'm not able to come near that limit.

Does an Amiga 2000 put out a lower voltage level on the parallel port
than clones do?  Is it within the parallel spec?  Is there even such a
thing as a specification for parallel ports?  Assuming that we can't get
the computer closer to the parallel switching device, is there anything
that can be done?

Thanks,

  - steve


Xref: sparky comp.sys.amiga.hardware:22239 comp.sys.amiga.applications:9709
From: jma@plasma2.ssl.berkeley.edu (Jim Alexander)
Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga.applications
Subject: Serious problems with Setpatch under 2.1 - HELP?!?
Date: 31 Dec 1992 22:13:54 GMT
Organization: UC Berkeley Space Sciences Laboratory
NNTP-Posting-Host: plasma2.ssl.berkeley.edu


Well, I had been using 2.1 with no problems for about a week now, but
today a ran into a serious problem. I was messing around with AMAX,
trying to get it to recognize a Mac HD I have hooked up to my machine
(a A3000 16MHz, BTW). When I warm-booted out of AMAX, my Amiga drives
refused to boot under any of the 2.1 HD partitions or floppies that
I have. After some investegation, I found that it was setpatch, the
first thing called in the startup-sequence of all my disks - setpatch
was immediately locking up my machine when it tried to boot. If I
comment out the setpacth line in the startup-sequence, my drives will
boot, but WorkBench becomes kind of unstable.

Has _anyone_ run into this kind of problem before? Any ideas on fixing
this. I'm afraid I'm completely baffled by this . . .

Thanks in advance for any help you can provide!

-- 

--------------------------------------------------------------------------
Jim Alexander               | "If there's nothing wrong with me, there
jma@sunspot.ssl.berkeley.edu|  must be something wrong with the universe."
Newsgroups: comp.sys.amiga.hardware
Subject: 1200/4000 Monitor Q's: Need answers ASAP
From: dseaman@oread.cc.ukans.edu
Date: 23 Dec 92 11:45:49 CST
Organization: University of Kansas Academic Computing Serces

Is there a FAQ for what monitors will work with the 1200/4000? I am
going to buy an a1200, and was wondering what monitors will allow me
to use all of the new modes. I know the 1960 will work, but I have
heard they are crap. What about the quad-sync monitors that C= will be
releasing soon? Price, etc. 

I am probably not the only one interested in such info, so please post
replies here and/or e-mail me and I will post the results. 

Thanks in advance,

Derek

-- 
DSeaman@Oread.cc.ukans.edu
Derek Seaman