Specifications
• SCSITOOL
--
SCSI device exerciser and debugger.
• SCSIFORMAT
--
Formats SCSI hard disk drives.
• SCSIPARK
--
Hard disk park.
3.3 WAIT STATE (CPU SPEED) INITIAUZATION
One of the most important system parameters to configure is the number of wait states for
the various types of
CPU operations. The ROM-BIOS assumes
the
slowest types of devices,
so that the system can boot successfully regardless of what
is
present in
the
system. Conse-
quently, to obtain maximum performance from your system, you should set the wait state
values
to
the minimum needed for reliable operation. This is easily accomplished with the
Ampro SETW AIT utility, which
is
described in detail in Appendix A.
Assuming you are using the Little
Board/PC in the normal manner, system RAM
is
all on-
board and requires a single wait state. In general, PC Expansion Bus plug-in cards can run in
fast
PC's (like the Little
Board/PC),
and also only require a single wait state. The turbo
configuration can be set using the SETW AIT utility, with the following long command line:
A>SETWAIT UMB32 LMB5l2
UMWO
MMWl
LMWl
IOWl
RFWl
DMAWl<Enter>
A batch fIle,TURBO.BAT, is included on the Little Board/PC Utilities diskette containing
the preceding SETW AIT command line.
Use the following command:
A>
TURBO < Enter>
A corresponding batch
fIle,
SLOW.BAT, sets your system wait states to emulate the speed of
a standard 4.77 MHz
PC. You can easily switch your system between "standard" PC and
"turbo"
PC modes
by
using
the
SLOW and TURBO commands. (The corresponding .BAT
fIles
must be present in the system.)
You can include the SETWAIT command (from the TURBO.BAT)
fIle
as
the fIrst command
in your AUTOEXEC.BAT
fIle
if
you wish your system to boot in the turbo mode.
3.4 USING A PARALLEL PRINTER
No special confIguration is required for using the system with a Centronics type parallel
printer. Simply refer to the parallel printer
as
the DOS
LPTl
device, and be sure the parallel
printer port
is
properly confIgured as described in Chapter
2.
Most application software uses
LPTI
as the default printer port, so printing to the parallel printer interface is automatic if
the port
is jumpered that
way.
For example, the following DOS commands will result in printing to the parallel printer:
A>COPY
CONFIG.SYS
LPTl<Enter>
...... prints contents of CONFIG.syS
A>DIR
>LPTl<Enter>
...... prints the directory
3-4