Some weeks are I released a text in Swedish in fidonet how to build in a
3 1/2" IDE Harddisk in your A1200 INTERNALLY.. I decided to translate this
into English and release it as a file!

           ****************************************************
           * HOW TO INSTALL A 3 1/2" IDE HARDDISK IN AN A1200 *
           * BY CHUCKY OF X-TRADE *SOME* TIPS BY DIRTYBUSH/DC *
           *I TAKE NO RESPONSABILITY OF ANYTHING WHEN YOU DOES*
           *                THIS INSTALLATION..               *
           *                                                  *
           *  IF YOU AREN'T USED TO *SIMPLE* ELECTRONICS AS   *
           * THIS YOU SHOULD LET SOMEONE ELSE DO THIS FOR YOU *
           ****************************************************



In this text theres NO need to BEND any metals as described in some
german computer magazines etc..

YOU NEED:

1 Screwdriver
1 small cup to keep the screws
1 3 1/2" IDE SLIMLINE Harddisk
1 40 pin 3 1/2" IDE contact with cable
1 44 pin 2 1/2" IDE contact with cable
1 Power contact for the HD
some cables
some paper

ok here you go:
 
1. open your Amiga..
2. Disconnect the cables connected to the diskdrive power and the LEDs
3. To make room for the HD you must CUT the contacts from those cables and
   solder them DIRECTLY on the pins in your computer. be EXTREMELEY careful
   when doing this so the cables comes on the RIGHT pin!!!!
4. To get power to your HD you take the power from the discdrive power.
   connect the cables as following to your HD-Power contact:
   (You can see a little "1" stated just by the side of the connector on the
    Amiga 1200 PCB that's where pin 1 is!)

 Diskdrive power connector in the computer:
 
    ---- <- A protection in your 1200 so you cant turn the contact WRONG
    1234                  1=+5V      2 och 3 = GND    4=+12V
  
  
 The HD Contact:
    ______ 
   |      |
   | 1234 |               1 = +12V   2 och 3 = GND    4 = +5V
    \____/
 
 
 
 NOTE:
    Isolate the contacts with TAPE or anything else.. just to make sure
    you doesnt frie your Amiga.

5. Remove that lille metallic shield for the space to the clock! If you want
   a clock in your 1200 buy a memorycard with a clock in it instead
   You need to do this to make room for the HD in the computer.
6. Now you have to make a IDE cable. as you notice the IDE controller in
   the Amiga got 44 pins but the HD got only 40 pins.. this is as the 2 1/2"
   drive have it's power connected in the IDE cable aswell.. (5V). The thing
   you have to do is a cable that only contains the 40 first pins connected.
   the last 4 can be skipped.
   There ARE adapters to buy so you dont have to make a OWN 2 1/2" -> 3 1/2"
   cable, but if you can't get hold of an adapter like this then you must make
   one.  Its quite simple.. just get your 2 1/2" contact WITH cable and solder
   the FIRST 40 pins to your 3 1/2" contact with cable..
   The pins are counted as following (In the contact):

   1  3  5  7  9 11 13 15 17 19 Etc...
   2  4  6  8 10 12 14 16 18 20 Etc...

   In the cable it's ofcauze counted as: 1 2 3 4 5 6 7 8 9 10 11 12 etc etc.
   (With a start on the colored cable)

   The "44" pin is located just next to the RF-Modulator in your Amiga...

   It's NO DANGER to connect the cable UP-SIDE-DOWN in your HD as long as
   the pins 41-44 in your 1200 is ***NOT*** connected.
   (As those pins are containing +5V power etc!)
   (read below for specifications)

7. now place your HD next to the diskdrive UP-SIDE-DOWN.
   connect the power and the IDE cable.
   and isolate the HD PCB with a piece of paper just to make sure nothing
   will happen.
8. Check all your solderings SEVERAL times! especially to the POWER!!!
9. Turn ON your computer and now you HD should spin up. the HD led will flash
   a little when the HD got the right speed and then boot up as usual.
   If your HD is silent you have connected the POWER wrong OR the IDE cable
   is up-side-down! test with the IDE cable disconnected or turn it around!)
10. Load a HD prep program (I have supplied HDToolBox) and prep your drive.
    (there are other prep programs for A1200 HDs like the GVP ExpertPrep etc)
11. put in all screws in your Amiga.
12. ENJOY your HD! You have room for a 2 1/2" HD in the Amiga aswell if you
    want to have one aswell (then you have to set your 3 1/2" drive in
    SLAVE mode, read more about that in your HD papers! It's some jumpers to
    be set!)

I advice you to get a little FAN in your computer as a 3 1/2" harddrive gets
a little bit warmer then a 2 1/2" HD. Or if you have much equipment mounted
to your Amiga you should get another powersupply.
Especially if you will have your computer turned on for a long time like
running a BBS etc.

I have done this and are running a 127MB Quantum 3 1/2" ELS harddrive in my
A1200 and it does 1.2MB/sec with fastmem. (That's actually FASTER then some
harddrives supplied with the Amiga 4000/040)

NOTICE:
Some HDs wont work on A1200.. (NOT usual but..) like a Conner 40MB harddrive
i got at home!  it just says NOT A DOS DISK when i try to format it.

To contact me:

BBS: GangBang +46 (0)554-12133 A3000 25MHz 68040, /X 3.6, 1GIG HD, 16.8 DS
                               Hardware, Graffiti, Modules, X-rated, Elite ETC
                               SYSOP: Chucky  COSYSOPS: Skalman, Core, Jetfire

Snail:	John Hertell
	Hckgatan 3
	665 32 Kil
	Sweden

Fidonet:	2:203/603.53@John Hertell
Internet:	N/A yet

--------------------------------------------------------------------
I just got a file on how to install a 3 1/2" drive without cutting
any cables but this was done trough making the diskdrive external..
if you want to do that use that idea instead.. but mine looks better
and the 3 1/2" doesnt cost so much! (i bought my 127MB drive for 3000SEK
lower price then a 2 1/2" drive) so you earn that money and if your
computer DO break down it wont cost so much to fix it anyway.

But in that file i saw the specifications of the IDE connector so i
will enclose it here:


    The pinouts are as follows:  (_NAME means signal active low)

    Name      2.5"   3.5"    Desc
    _RESET  |   1  |   1  |  Drive reset
    GROUND  |   2  |   2  |
    DD7     |   3  |   3  |  Drive data bus bit 7
    DD8     |   4  |   4  |  Drive data bus bit 8
    DD6     |   5  |   5  |  Drive data bus bit 6
    DD9     |   6  |   6  |  Drive data bus bit 9
    DD5     |   7  |   7  |  Drive data bus bit 5
    DD10    |   8  |   8  |  Drive data bus bit 10
    DD4     |   9  |   9  |  Drive data bus bit 4
    DD11    |  10  |  10  |  Drive data bus bit 11
    DD3     |  11  |  11  |  Drive data bus bit 3
    DD12    |  12  |  12  |  Drive data bus bit 12
    DD2     |  13  |  13  |  Drive data bus bit 2
    DD13    |  14  |  14  |  Drive data bus bit 13
    DD1     |  15  |  15  |  Drive data bus bit 1
    DD14    |  16  |  16  |  Drive data bus bit 14
    DD0     |  17  |  17  |  Drive data bus bit 0
    DD15    |  18  |  18  |  Drive data bus bit 15
    GROUND  |  19  |  19  |
    key     |  20  |  20  |  Key for interface connector
    DMARQ   |  21  |  21  |  DMA request (not supported yet)
    GROUND  |  22  |  22  |
    _DIOW   |  23  |  23  |  Drive I/O write
    GROUND  |  24  |  24  |
    _DIOR   |  25  |  25  |  Drive I/O read
    GROUND  |  26  |  26  |
    IORDY   |  27  |  27  |  I/O channel ready
    SPSYNC  |  28  |  28  |  Spindle sync (not supported yet)
    _DMACK  |  29  |  29  |  DMA acknowledge (not supported yet)
    GROUND  |  30  |  30  |
    INTRQ   |  31  |  31  |  Drive interrupt
    _IOCS16 |  32  |  32  |  Drive 16 bit I/O
    DA1     |  33  |  33  |  Drive address bus bit 1
    _PDIAG  |  34  |  34  |  Passed diagnostics
    DA0     |  35  |  35  |  Drive address bus bit 0
    DA2     |  36  |  36  |  Drive address bus bit 2
    _CS1FX  |  37  |  37  |  Chip select 0
    _CS3FX  |  38  |  38  |  Chip select 1
    _DASP   |  39  |  39  |  Drive active/slave present
    GROUND  |  40  |  40  |
    +5v     |  41  |  --  |  +5v supply
    +5v     |  42  |  --  |  +5v supply
    GROUND  |  43  |  --  |
    RESERVED|  44  |  --  |  Reserved for future definition

