Advertisement
• 320X200 Graphics Mode, (CGM)
s
s
,
, 0 .
G . '
111 this mode',~4 of 1,6
colors
cEinbeTcffsPlayedY-r-""-1"-- l -.-
"' I
IJ'2Q~Ttl~ ;c;o-laricnj1:-~ign~l~ ~.elect
'four tOlorsi from'i
the
qalor
~et
0
~or
1
corresponding to the bit
S'ofThecolors8ie'Ci
"register. The color set
1 includes the blue color signal, however the color set 0 does not
include the blue color
sigp~L_,.-;-_
_j ------T----,-
-'-T-- _, __
~_
1.!,:Sy~~i,q~~_~)~~~~gnp~p,~~}frJv1~)b1~;:,arr. Sf10~'b ~r~::
1
;
.
..,
BSCOD~-~~f+OOOOOO"'~" ,000000
BS~CI-----jBS~C'!''':J-?5oo00aa·--;-;-I~-OOOOOO~T'iAAC''~JI-------iBAogF
00000",
1"'OOOQoo
000000,,·
"'OOOOOOq~==--'
"'COO'~---,BA04f
~:f:,~'r: ~~~J._
...
..I:
..
,ru~-~J:,~888888:::
f:::888,88?
UBtFU
I
liBBFJF
I
:L:
:~J
. ________ , ___
320 Imls
1 Pi>:el-2 bill
__ .•
..J
Figure
2~4;1,"'-v'-H~ry,tmap,il"!_3~O,.X
209.,graphics
mode
.,
_
..
~
-
-
-
,
•
J
~
. __ ' " , __
•
T~ble
2-32.
Bit assignments
!
i",1
I
CO
Cl
I
CO
,e!',1
CO
Cl
I
CO
ii";'"
First
Second
'_'_~
rliird
Fourth
: ,
display
display
.
dis~Jay
"; .",d}spJa y
:
element
element
-elerBent
.
~ler:nE!nt.
L-~~~~-L
__
~~~-L
__
~~~~~~
.~~~
:! •
640~200 Graphics Mode (CGM)
.
. .
"' " rn-:'thrs: high res'olution mode, every bit of the
Y-RAM
c;orresponds
. to~e:Yery~pixerornti"En>cr'e-etL'~ ,~'"~"' ~J
--"
,
: ]"';:'11)
_:l ;
,J ,:
t'
·"'",;i..;',,,· ""':-,"',,"
' c .. .
.!!H...:.'
."'.J'
'.'''\'1",:
"c:' """""':"'",
..
,00"
-~
..
~~-f-S88888:::
I 88888
l
(0(,
''''''''"iii''I------, ''"''
B~50
J
~ 000000"" ~
T.'
000000
84050
BA09F
,
-000000'" .
·OOOOOO--j-L_..J
:
~i
\
•
~-~'''"FII
.'
! i "
"""
F
B9F3F
1-000000··
"j ...
000000 ."~~".~ol'--,BBFJF
000000 .. · .. ·000000
-<
1140 PUeis
1: Pix8I-tbit
,-.;
""r
.!
I " " ,
'
,
j
Figure 2-43. Bft
.assigriif1e'hts~~~' ~
'-
.,
'il
:
--,-~."-'
j
"1\
~,I
/ :
12-2-17-5. CG-ROM Map
i '
.,.!
- .. ---.... - ..
~.:
",;,d
' , I
The CG-ROM has 16K bytes of memory
~cap~~iN.'JfH;;i:_IOW~.r.: 4K~:;~
'\ bytes.(OH-OFFFH) and used for thel LCD' (MTM &.CGM).
. . , ,
IJ
:,tiils:' AK bytes storage area _is
furth~!r diviq~q
,int9 ,-half;_
256-'char~ce~' ::~
~fcj'ne patterrfs~
ffaQing=tfiesmgl&d6t construction'
are
'sforacf Ir(the
1>1' 1
first
,~K:.:_.9yt;~:"~jnp~ 1~1~9: ~5g,\ cbla~i:!_~~e~ :f~~}."t~\P~n:~n~,1t~,~~ing
the
doubleLdbV construction" are -stdred--In' the}· remalnlngJarea 1 of the
CGROM.
The 2K bytes (2800H-2FFFH) are used for CGM. The upper 4K
bytes (3000H-3FFFH) are used for MTM.
This 4K-byte storage area is further divided into half; the lower half
of 4K-byte stores the upper area of the 8x14 character box, and
also the upper half of 4K
w
byte stores the remaining area of the
character box.
Though the CGROM has character font'patternsl it:
is~'ifM~sed'
in
b,'the ;gr1iphies]ffispJ'aY::-rflod8)-'(GGMpiWtierf
-di$playjtig3tha'r&cfe--r!~
in
21 ttle
gtaphK:'s~mdd'erthe font.Cilafa stdrsti-'irHhefBIOS
ROM'isllrsed.
,~I
RASTER
ADORESSI-' D-
. l
2
SINGLE
i
:3"-
FONT
'4
I
5
; 6
"_:,1'
";'i1.-
CGROM
,.1:;;:
Tif
"·il!'I..;~;;.L-;,
• • • ,:
DOU8LE
FONT
RASTER
'0
ADDRESS,l
2
,
,-
5
6
7
,
9
A
,
C
o
CGROM OUTPUT
I
i
07
qs os
04 03 02 01 00
t,~J:::;~')1
3;i:J
:,jv
lJ8~);)!Jl
3BOOH
L.... _ _
"-"-'...:.~
3FfFH
Figure 2·44. CG·ROWmap
'-'
,";,1..
:T\ 1,:
"'J-],:Ji.-.
li,)"1
lii~!;Ji1lJ
d;i\;'/
, ':j
Hide quick links:
Advertisement
