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Commodore Trivia 39
----Commodore Trivia Contest Edition #39 Questions and Answers Preface----
Below are the answer to the Commodore Trivia Contest Edition noted above.
I will wait a few days for the answers to circulate and any errors to
surface and then score the entries. The newest edition of trivia should
already be available. I encourage you to enter it.
This edition of trivia answers has been posted to the following
locations:
USENET newsgroups: comp.sys.cbm,
alt.folklore.computers,
comp.sys.amiga.advocacy
FIDONet Echoes: F-CBM
CommNet Message Bases: Commodore Software Support
This edition and previous editions of the trivia can be obtained from the
following locations:
FTP: ftp://ftp.jbrain.com/pub/cbm/trivia/
WWW: http://www.jbrain.com/trivia/ (HTML)
http://www.jbrain.com/pub/cbm/trivia/ (TEXT)
Email: ftpmail@mail.jbrain.com
Body:
open
cd /pub/cbm/trivia
get triviaX.txt (replace X with number_
quit
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Feel free to use these trivia answers in newsletters, magazines, and other
publications (please see disclaimer). If you use the trivia, I would
appreciate knowing where it has ended up. If you intend to use this
information, please wait a few days after the posting date to allow for
major errors to be corrected.
Please mail any new questions for upcoming trivia (with answers) to:
trivia-submit@mail.jbrain.com
----Commodore Trivia Contest Edition #39 Questions and Answers (BEGIN)----
Q $260) In BASIC 2.0, what happens if you try to CONT a program after a
program has executed a STOP command?
A $260) The program is continued from the statement following the STOP
command.
Q $261) What is Drive Error 75 mean?
A $261) Alert readers will note this question is a duplicate of $252. My
memory is failing. I was looking for "Format Error". However,
Todd Elliott mentions this also appears on the 8250 as
"Format Speed Error".
Q $262) What does the Super Expander 64 command RDOT do?
A $262) RDOT(M) returns information for next pixel to be plotted using mode M.
M=0 return X coordinate.
M=1 return Y coordinate.
M=2 return Color Source.
Q $263) Quick, what does the 6502 opcode PHP do?
A $263) Pushes the processor status onto the stack.
Q $264) When using the SBC opcode to perform subtraction without a borrow,
should the carry flag be set or clear?
A $264) It should be set, since the carry flag is treated as "-Borrow"
(not borrow) when doing subtraction.
Q $265) Name the all-important zero-page subroutine on the VIC and 64 that
appears at location $73.
A $265) CHRGET. This routine fetches the BASIC next character. This routine
is usually patched to allow new BASIC commands.
Q $266) How many I/O locations does the SID IC in the 64 actually use?
A $266) 29 bytes.
Q $267) How many I/O locations does the SID IC in the 64 actually show up in?
A $267) 1024 bytes.
Q $268) How many blocks free does a newly formatted D9090 drive report?
A $268) 29162 blocks free. The drive contained a total of 29376 sectors,
implying that the initial BAM and directory reserved 214 sectors.
Q $269) Name the number of sectors per track on a D9060.
A $269) 32 sectors per track.
Q $26A) Name the only Commodore disk drive that used neither a serial bus
nor IEEE-488 bus hookup?
A $26A) I goofed on this question. There are three answers:
The Amiga external drives.
The 1551 (connected via cartridge to PLus/4 or C16)
The External Drive for the C65 (connected via nonstandard serial
bus)
Q $26B) The Block Availability Map for the 8050 and 8250 drives starts on
what track?
A $26B) Track 38.
Q $26C) On an 80 column PET, where does screen memory start?
A $26C) $8000. If you consider the B series to be PETs, then $d000 is also a
correct answer.
Q $26D) What CHR code can one use to scroll up on the 8032?
A $26D) chr$(25)
Q $26E) On the VIC-20, 0000 to 0002 were used to hold the jmp xxxx for the
USR function. The 6510 in the C64 took over 0000 and 0001. Where
did Commodore relocate the USR jump vector to on the 64?
A $26E) 784-786. The relocation causes an unused byte of zero page RAM at
$0002.
Q $26F) The KERNAL jump table on the VIC and 64 differ by how many bytes in
length?
A $26F) They are the exact same length on both machines.
The information in this between the lines marked by (BEGIN) and (END)
is copyright (c)1997 by Jim Brain. Provided that the information
between the (BEGIN) and (END) lines is not changed except to correct
typographical errors, the so marked copyrighted information may be
reproduced in its entirety on other networks or in other mediums. For
more information about this contest or using these questions, please
contact the Commodore Trivia Administrator.
Quick Resource List:
General Trivia Information: trivia-info@mail.jbrain.com
Trivia Submission: trivia-submit@mail.jbrain.com
Enter the Contest: trivia-contest@mail.jbrain.com
Comment on Trivia: trivia-comments@mail.jbrain.com
Contact Trivia Administrator: trivia-admin@mail.jbrain.com
Commodore Trivia WWW Site: http://www.jbrain.com/trivia/
Commodore Trivia FTP Site: ftp://ftp.jbrain.com/pub/cbm/trivia/
Trivia Contest Administrator: Jim Brain
Trivia Postal Address: 10710 Bruhn Avenue
Bennington, NE 68007
Commodore Trivia Phone: (402) 431-7754
-----Commodore Trivia Contest Edition #39 Questions and Answers (END)-----
