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* COMPO Software Limited  *
* AT SPEED C16            *
* Release 3.5             *
* README file             *
* APRIL 1992              *
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DR DOS

There are some problems installing DR DOS to autoboot from hard 
disk. Make sure that when you are trying to install DR DOS you 
only have the one TOS drive assigned that you want to make 
autobooting. (Obviously not TOS C). As soon as DR DOS is installed 
then you can assign others. We have had some difficulty getting DR 
DOS booting on some drives. The problem is known with some Evesham 
Reference drives. Whilst no-one has wiped out there hard disk we 
do strongly recomend that you back up ALL your data to floppy 
before trying to get autoboot to work. There is no absoloute need 
to use DR DOS with AT SPEED.

If you want you can use MS DOS. If so please try and use a regular 
Microsoft copy. Some machine specific versions such as Compaq, 
Zenith or Tulip will give problems booting off hard disk.

If you install DR DOS to hard disk you may get an error message 
that the hard disk you are trying to install to is not a bootable 
hard disk - just ignore the message.

When installing to hard disk you may get the message unable to 
create CONFIG.SYS file. If so copy CONFIG.SYS from your 
System/Install disk to the root directory of DOS drive C. Then 
reboot your computer and type SETUP from the root directory of 
drive C. Accept the defaults for all options and the system should 
install. When installing to floppy you may get a similar message. 
If so rerun Setup with your New System disk in drive A. No need to 
copy the CONFIG.SYS file.

When trying to install DR DOS please follow the instructions in 
the manual about DR_FIX and FDISK very carefully.... this helps!


Installation

If you have an ST F/FM with the 68000 under the space bar at the 
very front of the system board then special care is needed in 
fitting. The IC socket should be seated well down on the 68000 and 
tilted at a slight angle so that AT SPEED C16 will fit without 
touching the metal canister. Only one IC socket holder is needed 
and the shielding will definitely need to be cut in order to 
reassemble the machine. (It may not be possible to fit an 80C287 
coprocessor with this configuration. If this is a problem then we 
recommend you install your ST in a TOWER system available from 
COMPO Authorised Dealer The ATARI workshop.)

The most common problem when fitting AT SPEED is due to not 
pushing the board into the socket far enough. When it is in 
properly you can't see the pins of the AT SPEED board!


MEGA ST(E)

There is a special adapter for fitting AT SPEED C16 to the Mega 
ST(E) - call COMPO or your dealer for details.


ST(E)

When fitting to an ST(E) it is not immediately obvious where the 
pins on the SPEED CONNECTOR board fit. They do not fit between
the 68000 and the socket holder. If you look carefully you will 
see that there is a second set of holes in the chip carrier into
which the AT SPEED board fits.

After fitting to an ST(E) one of the two screws which hold the 
disk drive cover should either be shortened or left out to prevent 
it touching the AT-SPEED board.

Many ST(E)s sold in the UK have a faulty DMA chip. Whilst this is 
not always apparent when you use the machine under TOS as you add 
more to your machine, extra memory, a hard disk or a SPEED board 
this can be enough to cause DMA failures. Amongst other things DMA 
chip problems will cause the ST(E) to hang or the hard disk to 
become corrupt. The problem is heat related so you will see the 
problem get worse the hotter the weather and the longer you have 
your ST switched on. If you need to replace the DMA chip then use 
chip C398739-001. We believe that this is a special ST(E) DMA 
chip.


Mega ST and ST(E) booting errors.

On the C16 board just below the words Rev 2 is a spot marked GND. 
This may need to be taken to a suitable ground in the ST. 
(Symptoms corrected by this are that booting fails - usually in a 
random way.)


Heat

AT SPEED C16 uses an 80C286 processor and so does not get nearly 
as hot as previous boards.


Maths Co-processor

If you want to fit a maths co-processor then make sure that it 
runs at least 10 Mhz and is a CMOS 80C287. (else you can make 
toast using your C16 board!). Check first that the 80C287 will fit 
in your particular model ST before parting with any money!


Memory Support

When using AT SPEED C16 any spare memory is available as extended 
memory. Some PC applications want Expanded Memory (eg Lotus 123). 
If you need Expanded memory then COMPO sell TC!POWER. TC!POWER 
allows you to use either Extended Memory or your hard disk as 
Expanded memory and costs 39.99 direct from COMPO.


Hard Disk

When installing a hard disk either use Atari for Atari drives, 
otherwise use Multi (even for ICD drives!). Whilst installing for 
ICD works sometimes, you may have trouble running ADD_PART.SYS.


Floppy Disk

You can adjust the steprate on both drives A and B by using the 
ATS_INST.PRG. Normally 3 1/2 Inch Drives requires 3ms. 5 1/4 Inch 
drives requires 6ms. Very slow drives requires 12ms.


Compatibility with Microsoft Windows

Do not install the Windows SMARTDRV program. This can cause hard 
disk corruption in certain machines.


Compatibilty with disk cache programs

Apart from SMARTDRV other disk cache programs can cause hard disk 
corruption. Use them (if you must) with great care.


Return to TOS

Pressing Alternate Control Insert rather than Alternate Control 
Delete takes you automatically back from DOS to TOS.


Upgrading from PC SPEED

AT-SPEED C16 transfers the time from TOS to DOS automatically. You 
don't need the program TIMER.COM.


Upgrading from PC SPEED or AT SPEED

If you are currently using AT SPEED then we recommend that you do 
not change the version of DOS you are using unless you are 
dissatisfied with your current version. If you do plan to upgrade 
to DR DOS we STRONGLY RECOMMEND that you take a full backup of ALL 
partitions of your hard disk.