From: Eldridge.es at PARC-MAXC.ARPA
To: info-cpm at brl.ARPA
Re: L80 patch to avoid disk reset
Date: Thu, 8 Mar 84 12:33 PST
The linker "L80.COM" from Microsoft behaves in way that can be annoying.
L80 does a disk reset and relogs the disk every time it accesses a new
REL file. This was done so that .REL files from several disks could be
linked simply by inserting the proper disk before entering the name of
the .REL file. All the relogging avoided the dreaded BDOS ERROR: R/O
that comes from indiscriminately swapping disks.
If you never swap disks, then this behavior just increases the link
time. This relogging becomes very time consuming when you have a hard
disk with a large directory since CP/M must regenerate the allocation
map every time it resets the disk. The following patch will eliminate
the unnecessary relogging.
This patch is for Link-80 3.44 09-Dec-81.
A>REN L80.BAK=L80.COM
A>DDT L80.BAK
DDT VERS 2.2
NEXT PC
2B00 0100
-L2CC
02CC MVI C,19
02CE CALL 0005
02D1 PUSH PSW
02D2 MVI C,0D
02D4 CALL 0005
02D7 POP PSW
02D8 MOV E,A
02D9 MVI C,0E
02DB CALL 0005
02DE XRA A
-A2CE
02CE JMP 02DE
02D1 .
-S395
0395 20 31
0396 20 .
-^C
A>SAVE 42 L80.COM
The patch causes a jump around the disk relogging calls. The version
number is also changed to 3.441.
If you have been linking files on a hard disk you will be pleased by the
marked increase in speed. I have not had any problems linking files
using the patched version of L80. Remember that you cannot swap disks
while you are running the modified version of L80.
George (
[email protected])
