Yes, this machine has been certified by SCO for use with
SCO Open Server 3.0, SCO Open Desktop 3.0 and SCO UNIX
Operating System Version 4.2. It is scheduled to be
included in a future version of the SCO Hardware
Compatibility Handbook (HCH).
There are some issues with the T4900CT:
I. IDE disk
One issue with the Toshiba T4900CT is that the system hangs
during SCO UNIX and SCO Open Desktop installation if the disk
is configured incorrectly.
SCO Open Desktop:
The installation goes through N1. While reading the
N2 diskette, it hangs after this message:
mem: total = xxxxk, kernel = xxxxk, user = xxxxk
rootdev = 2/96, swapdev = 31/8, pipedev = <none>, dumpdev = 31/8
nswap = 32, swplo = 32, Hz = 100
kernel: i/o bufs = xxxk"
SCO UNIX Operating System:
The installation hangs on the "System V Hard Disk
Initialization" selection screen at the point of
1. Fully Configurable Initialization
2. Automatic Initialization(use system defaults)
3. Exit Installation
Enter your choice:
The system hangs after keying in the appropriate selection.
SCO UNIX Operating System and SCO Open Desktop will install on a
Toshiba T4900CT under these conditions:
The IDE hard drive must be configured for "Standard IDE"
rather than "Enhanced IDE".
This will reduce the available size of your disk from
810MB to 520MB.
To get into the BIOS:
1. Switch on the machine while pressing the <Esc> key.
You will see the message "Check system. Then press <F1> key."
2. Press <F1>.
3. Use the arrow keys to go to the Hard Disk field and then use
the space bar to change the value to "Standard IDE".
4. Use the "End" and "Y" keys to save the new BIOS values.
II. Attachment to DeskStation
On early versions of the T4900CT, there is a problem with
the Gate Array. This shows up as being unable to install
using an Adaptec SCSI controller (typically a 1542CF) in the
DeskStation. The SCSI bus is not scanned by the system
There are three possible solutions:
1. This problem should only occur on machines that
also have the Pentium "fdiv" problem.
Return the machine to Toshiba to have the Pentium processor
upgraded. Toshiba is also exchanging the Gate Array at the
2. You may be able to install by lowering the SCSI DMA rate
to 3.3Mb/sec, disabling the internal CPU cache in the
System Setup, and disabling the SCSI BIOS on the Adaptec
3. Try another SCSI adapter; it has been reported that the
Future Domain controller works.
III. Mousepoint Mouse
The Mousepoint mouse may appear to "stick", when scologin is
run. A supplement is available to resolve this issue.
IV. T4900CT Display Specifications
High Resolution Thin Film Transistor(TFT) color LCD, 640*480
pixel Resolution, 10.4" diagonal display size.
There is no SCO graphics driver for the "C & T - F66545" chipset.
This model is only supported at standard VGA graphics.
V. Networking using the 3-COM Etherlink III 3C589 PCMCIA card
Use "netconfig" to configure the card on interrupt 10.
Remember to install the card in slot 1 and not to use
the Auto-Configure option in "netconfig".
Note: Networking does not function unless the actual card
is reconfigured using the 3-COM supplied utility "3c589cfg".
The 3-COM diagnostics show that interrupt 10 is being used
by "something else".
Use the configuration utility "3c589cfg" to reconfigure
the interrupt on the card to another value (eg 3), in order
to get the card to function.
VI. Features of the T4900CT
Processor: Intel Pentium (Includes numeric coprocessor) - 75MHZ
Memory: The system has 8MB on the motherboard and is
expandable to 40MB using Toshiba RAM cards.
Graphics: Based on Chips and Technology's F66545 graphics
Ports: Serial - 1 x 9 way Port.
Parallel - 1 (Bidirectional) Port
PS/2 Keyboard Port
PS/2 Mouse Port
VGA Monitor Port
PCMCIA Rel 2.0 Type II
PCMCIA Rel 2.0 Type III
Toshiba internal memory slot
DeskStation IV Port