User`s guide

Table A-1. (continued)
Offset RW/RO Definition
1A RW Console Width. This byte contains the number of col-
umns, characters per line, on your console relative to
zero. Most systems default this value to 79. You can
set this default value by using the GENCPM or the
DEVICE utility. The console width value is used by the
banked version of CP/M 3 in BDOS function 10,
CP/M 3's console editing input function. Note that typ-
ing a character into the last position of the screen, as
specified by the Console Width field, must not cause
the terminal to advance to the next line.
1B RO Console Column Position. This byte contains the cur-
rent console column position.
1C RW Console Page Length. This byte contains the page length,
lines per page, of your console. Most systems default
this value to 24 lines per page. This default value may
be changed by using the GENCPM or the DEVICE util-
ity (see the CPIM Plus (CPIM Version 3) Operating
System User's Guide).
1D - 21 RO Reserved for system use.
22 - 2B RW Redirection flags for each of the five logical character
devices. If your system's BIOS supports assignment of
logical devices to physical devices, you can direct each
of the five logical character devices to any combination
of up to 12 physical devices. The 16-bit word for each
device represents the following:
Each bit represents a physical device where bit 15 cor-
responds to device zero and bit 4 corresponds to device
11. Bits zero through 3 are reserved for system use.
You can redirect the input and output logical devices
with the DEVICE command (see CP/M Plus (CP/M
Version 3) Operating System User's Guide).
A-2
Appendix A System Control Block CP/M 3 Programmer's Guide