SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 277
SPC8106
Manufacturer Part Number
SPC8106
Description
LCD/CRT VGA CONTROLLER
Manufacturer
S-MOS Systems
Datasheet
1.SPC8106.pdf
(432 pages)
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6.0
The information on Enabling the SPC8106 is contained in the examples located earlier in the doc-
uments “Initializing the SPC8106 in Mode 03h without a BIOS”; “Initializing the SPC8106 in Mode
12h without a BIOS”; and “Initializing the SPC8106 in Mode 101h without a BIOS”. In Step 1 of
each of these examples, it demonstrates the way to use port 3C3h to enable the chip. In the com-
mented code below Step 1, it demonstrates the method of enabling the chip using the alternate
46E8h port. The Enable port is determined at power up by the state of an MD line on the evalua-
tion board. For more information on the Enable port selection, please refer to the SPC8106 Hard-
ware Functional Specification.
The code required to disable the chip when using the enable port 3C3h is:
The code required to disable the chip when using the enable port 46E8h is:
SPC8106
411-1.0
mov
mov
out
ret
mov
mov
out
ret
ENABLING AND DISABLING THE SPC8106
S-MOS Systems, Inc. • Tel: (408) 922-0200 • Fax: (408) 922-0238 • http://www.smos.com
dx, 3C3h
al, 0
dx, al
dx, 46E8h
al, 06h
dx, al
X12-AN-003-02
Programming Notes and Examples
SP3-51
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