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Conference hydra::amiga_v1

Title:AMIGA NOTES
Notice:Join us in the *NEW* conference - HYDRA::AMIGA_V2
Moderator:HYDRA::MOORE
Created:Sat Apr 26 1986
Last Modified:Wed Feb 05 1992
Last Successful Update:Fri Jun 06 1997
Number of topics:5378
Total number of notes:38326

3367.0. "Sources for hard drive project" by TROPPO::FSINHOUSE () Fri Jan 19 1990 20:19

    On TAPE::USER2:[UPLOAD] there is a file there called MAKEHD.ZOO.
    
    According to the documentation this is a construction note on how
    to interface an IBM XT hard drive controller to you Amiga Bus.
    
    This file also includes two harddrive.device drivers called hd17.dev
    and hd26.dev.
    
    Does anybody out there have acces to the sources to these drivers
    as I would like to know as much about this project as possible.
    
    Thanks Shaun.
                                                     
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3367.1Here you areJGO::LOENDERSLOOTMon Jan 22 1990 06:068
    The sources have been uploaded to TAPE::USER2:[upload] and the file
    is called HDSOURCE.ZOO.
    It contains the source files to make the 'harddisk.device' driver.
    See for more additional information the MAKEHD.ZOO file and the
    CHEAPHD.ZOO file.
    
    Regards Jos van Loendersloot 
    (A happy user of this simple/cheap solution).
3367.2What if...MSVAX::BARRETTIs my PC a PicoVAX?Mon Jan 22 1990 14:4631
    I have the following configuration:
    
    	AMIGA 2000 rev 4.5
    	PC/XT Bridgeboard
    	30meg OSICARD (on the IBM side)
    
    I'm currently using the harddisk as a 21 meg Amiga drive with FFS,
    and a 9 meg IBM drive. This as a pretty good setup, considering
    that I've had a "21 meg" harddisk and only spent $320 on it. Only
    drawback was the inability of autobooting from it and my
    startup-sequence taking 2 minutes (due to JANUS initialization).
    
    This note and several others have caused me to raise some questions:
    
    1) Does JANUS V2 allow the above configuration to autoboot the AMIGA
    from the harddisk?
    
    2) (The documentation is not clear on this) - Can more than 1 drive
    be "hung" off the controller of the OSICARD? If so, how do I do
    it?
    
    3) (And the big question) - If I use the information in MAKEHD and
    CHEAPHD, will I be able to "move" the OSICARD from the IBM side
    to the AMIGA side? Will it autoboot? How does it compare in performance
    & reliability to "the old way" and to other Amiga SCSI drives?
    
    				Thanks in advance! I'm hoping for some
    				good answers.
    
    
    					Keith
3367.3Answers.MQOFS::LEDOUXReserved for Future UseWed Jan 24 1990 10:0319
    
    
    1)  In order to access the IBM side Hard disk, you have
        to use a program (PCDisk).  So it is impossible to
        boot "directly" from the IBM HD.  What you can do
        is setup a floppy that initialize PCDisk and wait
        for the IBM HD to come up then releases the control
        to it.
    
    2) I never saw a "osicard" but most IBM controler I
       saw has normaly 2 outputs for ST-506 type disks.
    	(3 "Berg" type connectors on the controler?)
    	
    3) I have no idea for that query.
    
    
    Enjoy,
    
    Vince.
3367.4Questions and AnswersMSVAX::BARRETTIt's not a mouse, it's a ratWed Jan 24 1990 12:5618
    Re: -.1
    
    1) Actually, that's not true. PCDISK is only used if transferring
    files between the two systems. The "Amiga" partition on the IBM
    drive is perfectly usable once mounted - but it does require the
    bridgeboard to complete its initilization process beforehand (which
    takes 60 - 90 seconds). My current startup sequence simply does
    the "BINDDRIVERS" command (which starts the IBM init sequence),
    then other stuff that fills the 60 second period, then a MOUNT of
    the Amiga partition. It is not necessary to start PCDISK unless
    you are going to use the AREAD or AWRITE commands, or virtual devices.
    
    2) My OSICARD documentation doesn't tell me much about the actual
    device. There is a sheet entitled "RLL Controller Card Formatting
    Instructions with 32MB Drives (ST 238, Miniscribe 3438)". Does that
    shed any light?
    
    3) Does anyone know?
3367.5MQOFS::LEDOUXReserved for Future UseWed Jan 24 1990 15:5230
    
    1) That's what I mean, you cannot boot directly an IBM based disk
       without previously goint to a floppy with the appropriate
       drivers and all.   It first "boot" df0: and releases the
       control to the IBM disk.  The proper library has to be in 
       DF0:expansion/ isn't it?  You are probably right about PCDisk,
       but I remember, it needs something.
    
    2) Your "osicard" resemble mine. It should support 2 drives since it
       has 3 conectors.  The drives would be connected this way:
    
    	----------------|
    	|  J1  J2  J3   |           J1  J2       J1  J2
    	|		|           HD # 0        HD #1
    	|  Osicard      |   
    	|_______________|
    	
    		Osicard           HD0        HD1
    		J1 to             J1
    		J2 to                         J1
    		J3 to             J2 to       J2
    
    	If it doesn't have 3 connectors (2 small, one larger) forget it.
        Those cables are standards and can be bought in any IBM shop.
    
        I personnaly mounted my second disk (3�") besides the power supply
        using 90� brackets,  where a A2620/A2630 would reside.
    
    
      Good Luck,  Vince.
3367.6Sounds goodMSVAX::BARRETTIt's not a mouse, it's a ratWed Jan 24 1990 16:037
    Thanks for the information. I'll be opening my system up within
    the next 10 days to install my Fatter Agnus and SupraRAM 2meg
    (yeah!!!), so I'll take a look at it then. I assume that the controller
    is for RLL type (does that mean I'm limitied to only RLL?). What
    drives would be good to use for my second uint? Like yours, it would
    have to be small so I could tuck it away inside. I'm not that familiar
    with the IBM world, so all help is appreciated.