DTK PIM-TB10 Podręcznik użytkownika - Strona 9
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CHAPTER 2
THE NORMALITURBO MODE OPERATION
2.1 ADVENTAGES OF THE 10MHZ TURBO
The difference between PIM·TB10 and other PC/XT main
boards is th'e PIM·TB10 main board allows .an increase at about
90% in speed of program execution. As the 8088·1 or qualified
8088.2 processor operates at a quicker speed at 10 MHZ.
In
other PC/XT main board, the clock speed is only 4.77 MHZ. Of
course, it is faster than 8MHZ Turbo, too.
The PIM·TB10 consists of dual clock system, in Normal
mode, the clock speed is only 4.77MHZ cycle. In Turbo mode, the
clock speed increases to 10 MHZ .cycle.
Note No.1: Please do not make use of RAM memory on inter·
face card.
Because its original design may be not
compatible with 10 MHZ high speed CPU at access
time.
*Please use memory on mainboard and use
4164 and 41256 & 4464 access time within 150 ns.
Note No.2: Use NEC 70108·10 to enable speed up to 340%
faster than normal XT
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2·2 To Obtain Turbo Mode at 10 MHZ
The system board SLlports both software switch as well as
hardware switch to allow transaction from Normal mode (4.77
MHZ) to Turbo mode (10 MHZ) and software switch, hardware
switch can be used at the same time to select each of them by'
jumper is not necessary.
AI Software Switch:
Software switch is available when using "ERSO/DTK
TURBO" BIOS only.
1) Turn on Turbo Mode:
Press and hold down the "CTR l" (CONTROL)
and "Al
T"
(ALTERNATIVE) Keys and ,hen press
the "-" (MINUS) key then the cursor on screen
display will appres as a'BOX'
Now, you are ready
to use Turbo mode and the Turbo LED is on
2) Press and hold down "CTR L" (CONTROL) and
"AL
T"
(ALTERNATE) keys and then press the "-"
(MINUS) key to come back to Normal mode at
4.77 MHZ.. You will see on screen display that the
cursor shows up as a "-" (DASH) and the Turbo
LED is off.
* E RSO/DT K
B I OS is registered copyright under
ERSO.
*
ERSO: short form from "E lectron ics Research &
Service Organization"
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