Download issue 2.4: Acrobat - tim

With
the above new C language commands, you can perform various logic patterns, and
control
the flow of a C program. Another flow control C statement is the goto. The
object of the goto
is a label. A label has the same form as a variable name but is
followed by a full colon. The goto and the label to go to must be in the same function.
The use of the goto
is not recommended, except for possibly branching out of some
heavily nested logic.
Next time, in PART V, the topic will be initialization, more on blocks, pointers and
arrays. C you next time!
GENERAL INTEREST
It has been reported that the "Active Variable Analyzer" in the last issue works as
listed only with the old "Memory Size" Model 1 ROMs. Mr. C. E. Clayes reports that if
the 9B at the 21st row down,
and the 18th column across in the BINHEX listing is
changed to a 7C, the resulting program will work on the new "MEM SIZE" ROMs. Another
LDOS user reports that a change to 6F should work on both ROM types.
Some people have been reporting difficulties with the Radio Shack Double Density
adapter. Remember-- the RS DDen unit requires at least LDOS 5.1.3,and will not function
with any earlier releases.
Also, the proper driver to use is RDUBL, not PDUBL.
Lastly, this adapter should only be installed by a competent computer technician, as it
requires alignment when it is installed. If you just "plug it in", it may seem to work,
but reliability of disk I/O will be questionable.
In regards to "Fix that SOLE GAT error" in the April ’83 LDOS Quarterly, Mr. R. D.
Greet reports that there is an easier method. He has supplied the following patch:
. Patch for SOLE2/CMD
. This patch modifies SOLE2 so that Directory ’fix’ programs
. do not generate a GAT error for track 0 on DDen boot disks
X’53D5’=CD CB 57
X’57CB’=3C 32 17 58 3A 01 58 CB FF 32 01 58 C9
. END OF PATCH
Mr. Greet has a Percom-type DDen adapter. This patch may work with the RS-type also.
He also has supplied the following patch to correct existing directories. If you patch
DIR/SYS, you must use REPAIR :d (ALIEN) or the extended debugger to re-write the system
DAM on the directory track. Do NOT work on a disk in drive 0.
PATCH DIR/SYS.SYSTEM (D02,02=80:D02,17=02)
The following are mandatory patches to LSI products:
In 5.1.4, the Date and Time prompts were changed to accept a wide range of delimiters
between digits,
rather than just "/" and ":". However, the Time prompt will now NOT
accept a colon (oops). To remedy that, apply the following patch to SYS0:
. Patch SYS0/SYS.SYSTEM - MOD 3 ONLY!
D0E,A5=3B
. EOP
. Patch SYS0/SYS.SYSTEM - MODEL 1 ONLY!
D0E,63=3B
. EOP
. FMA/FIX - 07/14/83
. This patch is to the 5.1 version of FM to correct problems in moving system files
D19,62=" a"
D01,09=11 80 58 C3 DE 66
D0E,3C=CD C8 59
D01,0F=11 40 58 7E E6 50 FE 50 C0 F1 C3 7D 5E
D05,B2=CD CE 59
Page 38