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- ANYDRIVE a tool to fix the Drive-Parameters settings
- ----------------------------------------------------
- Version 1.0 27.February 1993
-
- Introduction:
- -------------
- Have you ever tried to install a new Harddisk in your PC and found that the
- BIOS did not support it? I was faced with that situation lately. I got advice
- to buy a new BIOS or to buy a special controller. All of that costs $ and is
- a lot of hassle. The BIOS might not be compatible with your Motherboard etc.
-
- This piece of Software fixes the problem WITHOUT any additional Hardware
- and allows you to run your old stable BIOS.
-
- How it works:
- -------------
- When the PC is booted, BIOS sets up Interrupt Vectors (0x41 and 0x46) which
- point to the parameters for the Harddisks 0 and 1. DOS picks up the Drive
- Information from the adresses given in these Vectors. A normal BIOS sets the
- Vectors up to point to a Drive-Table in ROM, but the newer BIOSses that allow
- customizable Cyl/Head/Sector settings store the Drive-Parameters in the BIOS
- Memory Area at Segment 0x40 and therefore they point to RAM. ANYDRIVE simpy
- does the same with the old BIOSes.
- Since ANYDRIVE is not resident in ROM some other place was needed for the
- Code to built the Drive-Parameters in the BIOS Area. This must be done
- before DOS is started because DOS builds up its own parameter blocks from
- the BIOS Drive-Parameters.
-
- The only place I could find was the Master Boot Block of the Harddrive. It
- contains the Partition-Table for the first Drive but is otherwise empty.
- ANYDRIVE inserts Code into the Master Boot Block to set up the
- Drive-Parameters in the BIOS Memory area and points the Interrupt-Vectors
- (0x41 and 0x46) to the new Parameters. DOS will look it up there and build
- its Disk Control-Blocks based on them and not on the settings in ROM.
-
- This means that ONLY after running the Master Control Block will
- the Drive-Parameters be correct. This is no problem when booting from the
- Harddisk since the Master Boot Block must be executed anyway. But if you
- insert a Floppy Disk and then boot the Machine the old BIOS-Parameters will
- be in effect! BE CAREFUL!
-
- You can avoid this by deactivating the DOS-Partition in Drive 0. Then the
- Master Boot Block will be executed but no active Partition will be found.
- ANYDRIVE will ask you to insert a Floppy and then allow you to boot
- with the correct Drive-Parameters. This feature is especially important for
- the first Boot as we will see later.
-
- Pressing LEFT-SHIFT while booting results in the same becuase it might be
- too inconvienient to deactivate the DOS-Partition. I remember that FDISK
- doesnt support that yet (Classical Microsoft behaviour).
-
- Hold LEFT-SHIFT while booting and ANYDRIVE will ask you to insert a Floppy
- for booting. Remember that there must be NO DISK in the Drive when you boot.
- Insert it when asked to.
-
- If you boot from Floppy and you did not have to press a Key to Boot
- YOU WILL HAVE THE INCORRECT BIOS-SETTINGS.
-
- Procedure for installing a primary Harddrive:
- ---------------------------------------------
- 1. Low Level Format if necessary (Use WDFMT, it allows you to specify all
- desired formats.) and perform Surface Scan if desired.
-
- 2. Configure some smaller Harddrive-Size in the BIOS Setup.
-
- 3. Run ANYDRIVE 0 <Cyl> <Heads> <Sects> ......
- This will create the Master Boot Block and partition the Drive to contain
- ONE partition for all of it. The Partition is not activated!
-
- 4. Reboot without a Disk in the Drive. The Master Boot Block will be executed
- and since no Partition is active, ANYDISK will ask you for a Floppy
- Disk to boot. Insert the DOS Disk and press a Key to boot again.
-
- 5. Perform High-Level Format. Change the Partitions if you want.
-
- 6. Run FDISK and activate the Primary Partition
-
- 7. Reboot from Harddisk. ANYDRIVE will only ask you for a Disk if you
- press LEFT-SHIFT while booting.
-
- Procedure for installing for a Secondary Harddrive
- --------------------------------------------------
- 1. Run ANYDRIVE 1 <Cyl> <Heads> <sects> ......
-
- 2. Reboot from Harddrive and run BIOS Setup. Change DriveType for Second
- Drive to something, so BIOS will know that there are two Drives.
-
- 3. Perform Lowlevel / Highlevel formatting as usual.
- You might choose to run LowLevel Formats before running ANYDRIVE if DOS
- or BIOS gives you trouble booting without format.
-
-
- Money Matters
- -------------
- Please send me $5 if you find this ANYDRIVE useful. This is only possible
- for PRIVATE use. If you want to use it commercially or in a company please
- contact me first.
-
- (C) 1993 Christoph Lameter, All Right reserved except as explicitly granted
- here. You may use the Software for 30 days to test it. Then either delete it
- or send $5. The $5 is the fee for using this Program on one PC as long as
- you wish. ANYDRIVE does not become your own.
-
- Commercial inquiries welcome.
-
- As usual there is no guarantee that this Software will work. It might not run
- because of incompatibility with Software or Hardware. By using this Software
- you accept the consquences that it will not work as intended.
-
- Send Check to
-
- Christoph Lameter, 244 N. Oakland Ave#6, Pasadena, CA
-
- You can reach me on
-
- Fido: 1:102/961
- InterNet: Christoph.Lameter@f961.n102.z1.fidonet.org
-
- If you have any question or if you need support remember that I was not paid
- for this program in any way. I am a student right now and cannot afford to
- spend long times helping people out without payment.
-
- I am deeply opposed to anyone taking profit from this software without my
- participation. Therefore distribution as ShareWare on Disk or CD is only
- allowed if the price of a CD is less than $10 and of a Disk less than $1.
- Should you find that anyone has sold you this software on any medium
- exceeding these prices contact me immediately.
- Join the protest against ShareWare ripoffs.
-
-