DSP 104-plus, Reference Manual

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In addition, the "Ultra DMA/33", or "UDMA" Mode allows even higher data transfers
by transferring two words on every data transfer cycle, and using DMA. UDMA
however requires an operating-system specific device driver. Suitable device drivers
are available for the Windows 95/98 and Windows NT operating systems and are
included on the TP400 Utility Disks.
IDE disk drives can be connected through the 44-pin 2mm-pitch connector, J100.
One or two drives can be connected on this cable - one configured as a master and
the other as a slave. Any combination of hard disks, CD-ROM drives and Compact
Flash cards can be connected.
The CF100 solid-state IDE disk drive is a small printed circuit board that contains a
connector for a Compact Flash memory module. The removable Compact Flash
modules are available in a wide range of sizes from 4M bytes to 128M bytes and
beyond. IBM sell a mechanical drive in Compact Flash format with a 1G byte
capacity. The CF100 PCB can be fixed to the TP400, mating directly on the J100 IDE
connector. Alternatively it can be connected to J100 through a length of ribbon cable,
and thus mounted elsewhere on the TP400 or elsewhere within the TP400’s
enclosure.
The Compact Flash cards can be removed from the CF100 and data transferred to
other PC computers. DSP Design sell Compact Flash cards and also a Compact
Flash card reader that plugs into the printer port of any PC. We have found that not
all Compact Flash cards will operate with the TP400 – we think this is more a fault of
the Compact Flash cards than the IDE code in the BIOS. Users who are considering
buying their own Compact Flash cards should take care, or contact DSP Design for
advice.
Appendix G contains details of the CF100.
The TP400 BIOS automatically identifies the drives connected to the TP400 at
power-on. It ascertains drive parameters (numbers of heads, cylinders etc, as well as
allowable transfer speeds) that are then used by the BIOS as it accesses the drives.
These parameters can be over-ridden if required, using the BIOS Setup program.
Use the Main / Primary Master and Main / Primary Slave menu entries.
Some old disk drives and some Compact Flash cards do not report their
parameters and so the parameters will need to be set manually for these
devices. For Compact Flash cards and IDE drives that do not seem to be working
properly when you use the Auto Detect option, do the following. In the Main / Primary
Master menu set the "type" to "User". Then set the Multi-sector Transfer to Disabled,
the LBA to Disabled, 32-Bit I/O to Disabled and Transfer Mode to Standard. These
settings may be unnecessarily conservative for some Compact Flash cards, but
others do not work in the faster modes. If necessary set the other disk parameters
(number of heads, cylinders and sectors per track) to the actual number of the drive.
A 2.5 inch to 3.5 inch IDE drive converter cable is available that allows 3.5 inch hard
disk drives to be connected to the TP400 (a separate power source is required for the
3.5 inch drive in this configuration). The converter cable is called the IDE3020.
The TCDEVPLUS development system also incorporates an IDE disk controller, as
well as a floppy disk controller and drive. Connection to the TP400 is via the PC/104
bus. The IDE disk controller on the TCDEVPLUS (but not on the TCDEV) presents
more options for connecting to drives. It has two 44-way 2mm connectors to connect
to 2.5” IDE drives, a 40-way 0.1” connector to connect to 3.5” IDE drives and CD-