41CL User Manual
© 2019, Systemyde International Corporation
33
YBPNT
(data in ALPHA register)
Executing
YBPNT
(
Write Extra Functions Buffer Pointer
) writes data directly to the
Extra Function Buffer Pointer
at address 0x804010.
The data must be a four-digit hex number but only the lower three digits of this value are
used. The most-significant digit is ignored and not changed by the buffer functions.
ALPHA register
4
3
2
1
Buffer pointer value
D3 D2 D1 D0
The function returns with the normal
YPOKE
formatted physical address of the Buffer
Pointer in the ALPHA register (but not the display):
ALPHA register
11
10
9
8
7
6
5
4
3
2
1
physical address
8
0
4
0
1
0
-
D3 D2 D1 D0
YBPNT?
Executing
YBPNT?
(
Read Extra Functions Buffer Pointer
) reads directly from
Extra
Function Buffer Pointer
at address 0x804010. The function returns with the normal
YPEEK
formatted physical address of the
Buffer Pointer
in the ALPHA register and the
display:
ALPHA register
11
10
9
8
7
6
5
4
3
2
1
physical address
8
0
4
0
1
0
-
D3 D2 D1 D0
