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9100A-017
template (such as the following Write Cycle Text File). A second
text file can be made that contains the address and data to be
inserted into the bus cycle (such as the following Address Data
Text File). A program (such as the example "build" program),
can be used to build a text file that is filled with the bus cycle
information that contains the required address and data
information. Once the file is complete, the text file may be
copied to a vector file.
GROUPS [40-21][20-13][1][2][3][4][5][7][8][6][12-9)
DISPLAY HEX,HEX,BIN
!
A19 - A0
!
!
!
!
! START OF WRITE CYCLE write $B8000, data $4107
1 $B8000
2 $B8000
WAIT +
3 $B8000
4 $B8001
5 $B8001
WAIT +
6 $B8001
Note that the previous vector file contains writes at two different
addresses. The build program automatically handles the address
incrementing.
The following text file contains the address followed by the
attribute byte and character.
B8000 07 41
B8002 07 42
B8004 07 43
B8006 07 44
B8008 07 45
BS00A 07 46
BS00C 07 47
B800E 07 48
B8010 07 49
B8012 07 4A
The following program was written specifically to process the
write cycle given in this example. This program can be easily
changed to handle different bus cycles.
7-22
Write Cycle Text File
D7-D0
I
O
R
-
-
$41
1
$41
1
$XX
1
$07
1
$07
1
$XX
1
Address Data Text File
I
M
M
A
R
I
I
O
E
E
E
E
O
O
W
M
M
N
S
R
C
-
W
R
E
D
L
-
T
Y
K
1
1
1
0
0
X
X
1
0
1
0
0
X
X
1
1
1
0
0
X
X
1
1
1
0
0
X
X
1
0
1
0
0
X
X
1
1
1
0
0
X
X
UNUSED
XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
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