Move chapter 7 to root, fix bitrot, nuke codes

This commit is contained in:
T. Joseph Carter 2017-07-21 04:54:05 -07:00
parent f456a5e764
commit 1b3552fee7

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@ -1,8 +1,4 @@
.bp
.np
.ce
CHAPTER 7 - CUSTOMIZING DOS
.sp1
# CHAPTER 7 - CUSTOMIZING DOS
Although DOS usually provides most of
the functionality needed by the BASIC
@ -20,7 +16,7 @@ modification of DOS without a clear
understanding of the full
implications of each change can
result in an unreliable system.
.sp1
SLAVE VS MASTER PATCHING
The usual procedure for making
@ -32,21 +28,19 @@ stored over other instructions within
DOS to modify the program. There are
three levels at which changes to DOS
may be applied.
.sp1
1 - A patch can be made to the DOS
in memory. If this is done, a later
reboot will cause the change to "fall
out" or be removed.
.sp1
2 - A patch of the first type can be
made permanent by initializing a\x1f?O7O?K'7s';;\x44\x4d\x08\x5a\x5d\x46\x46\x41\x46\x4f\x08\x5c\x40\x4d\x08\x58\x497#+''O\x87\x8f\x93oc\x97++3c77+'##37#g'7#'3#7g'g7+'3#K#/7/#33#g3/3/g'g'+7?g+#g\x83\x8b\x97g++g37''/7Kwkgwkg'+#gwg3//'/g'++3'/+7g3/#g7'3'h.
Each time this newly created diskette
is booted the patched version of DOS
will be loaded. Also, any slave
diskettes created by that diskette
will also contain the patched version
of DOS.
.bp
2 - A patch of the first type can be made permanent by initializing a diskette
while running the patched DOS. This procedure creates a slave diskette with a
copy of OOS on tracks 0, 1, and 2 which contains the patch. Each time this
newly created diskette is booted the patched version of DOS will be loaded.
Also, any slave diskettes created by that diskette will also contain the patched
version of DOS.
3 - The patch is applied directly to
a master diskette. This is somewhat
more complicated. Either the patch
@ -57,7 +51,7 @@ MASTER CREATE may be used to write
the changed copy of DOS to a new
diskette. The following procedure may
be followed to do this:
.br
BLOAD MASTER CREATE
Get into the monitor (CALL -151)
Store a $4C at location $80D (80D:4C)
@ -72,11 +66,10 @@ be followed to do this:
at location $82D (82DG).
Complete the MASTER CREATE update normally. The
resulting diskette will have the patches applied.
.br
This procedure will work for versions 3.2, 3.2.1, and 3.3 of
DOS.
.sp1
.ne5
AVOIDING RELOAD OF LANGUAGE CARD
A rather annoying addition to DOS 3.3
@ -107,20 +100,20 @@ always powers the machine off and on
between using DOS and any other
system, the patch may be removed as
follows.
.bp
At $BFD3 (48K) is a STA instruction which
stores a zero on the Language Card.
This instruction must be made into
three no-operation instructions:
BFD3:EA EA EA
.br
A slave diskette may then be INITed
using this modified version of DOS
and that diskette will have the
patch in its DOS. The address of the
store instruction for a 32K DOS is
7FD3 and for a 16K DOS is 3FD3.
.sp1
INSERTING A PROGRAM BETWEEN DOS AND ITS BUFFERS
Once in a while it is useful to find
@ -152,7 +145,7 @@ time DOS is booted. Of course, BASIC
can not get at that memory either,
since its HIMEM is below the DOS
buffers.
.bp
BRUN OR EXEC THE HELLO FILE
Ordinarily, when DOS finishes booting
@ -163,12 +156,11 @@ command which wrote DOS to the
diskette). To change the RUN command
to a BRUN or an EXEC, apply the
following patch to DOS (48K):
.sp1
9E42:34 (for BRUN)
..or..
9E42:14 (for EXEC)
.sp1
.ne5
REMOVING THE PAUSE DURING A LONG CATALOG
Normally, when a CATALOG command is
@ -180,9 +172,7 @@ By pressing any key
the CATALOG continues. If this pause
is undesirable, apply the following
patch to DOS (48K):
.sp1
AE34:60
.br
.bp
.st waiting for ch8 diskette
.nx ch8