SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 174
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SPC8104
Manufacturer Part Number
SPC8104
Description
VGA LCD CONTROLLER
Manufacturer
S-MOS Systems
Datasheet
1.SPC8104.pdf
(306 pages)
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;**********************************************************************
;
;
;
;
;**********************************************************************
Step8:
; ADDITIONAL SUPPORT ROUTINES
;----------------------------
; RunTable
; This routine interprets the configuration tables that we have
; presented above.
; index/data to a simple port write of data (ie. if High bit on
; Port value is set, then branch to simple port write BR3)
;
;
;
;
;----------------------------------------------------------------------------
;
;
;
;
;
;
;----------------------------------------------------------------------------
br0:
Programming Notes and Examples
SP3-20
STEP8 - Clear Vram. Initialize video memory with "normal" attributes
mov
mov
mov
xor
mov
cld
rep
ret
Entry:
Exit:
Uses:
RunTable - Initialize registers from table
Entry:
Exit:
Uses:
dec
S-MOS Systems, Inc. • Tel: (408) 922-0200 • Fax: (408) 922-0238 • http://www.smos.com
and ASCII spaces (blanks).
ax, 0B800h;
es, ax
cx, 4000h
di, di
ax, 720h
stosw
CS:SI - Pointer to big register table
n/a
AX,DX,SI
DS:SI - Pointer to register table
n/a
AX,DX,SI
si
PW is a mask bit that causes a branch from
;
; 16k Words = 32k Bytes
;
; normal attribute, ASCII space
;
; End of Step8.
; Undo last byte overrun
412-1.0
SPC8104
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