Boy I've helped 2 people on this list with such questions & All I asked for
was that they compile all the Asteroids stuff & make it available to all
hopefully by a Web page (that I'm sure Jess Askey would be happy to post).
No such luck yet.....
I can send GIF's of the pictures in STJ to anyone interested in the
aformentioned task.
Hello, I've sent several help files to XXXXX in hopes that he would create a
web page to help people with their Asteroids PCB (since we seem to have alot
of question on it lately). He has been to slow for me in devloping anything
for the community as far as a web page goes & now you are asking plus you
have a page so I'm forwarding this stuff to you in hopes that someone will
work on this project soon. You may want to check with XXXX & see if he has
any progress first.
I'm sure you have been pointed to the online schematics by now.
Since you are going to compile this I'll try harder to help.....
V1 #12
Please perform the follwoing modifications to your Asteroids PCBs.
1. Resistors R87, R91, R96, R97 & R 98 should be changed from 10K ohm to 470
ohms. To locate these resistors, refer to page 22 in the Asteroids manual
(TM-143). The resistors are located at coordinates K-11 and M-11 on the
main PCB.
This modification provides the 10 milliamps to open blade switches on the
control panel. 10 milliamps is required to insure adequate self-cleaning on
gold plated switches.
2. To prevent phosphor burn wehn switching from self-test to game mode,
perform the following modification.
A. Clip and lift Pin 9 of K9 (74LS164)
B. Jumper 30 gauge wire from lifted Pin 9 to Pin 15 or M-10 (74LS259)
(reset)
V2 #2
Atari Asteroids PCB Revisions
Because shortages of some intergrated circuits required substitutions durin
the production of Asteroids some confusion may result.
The following changes were made from Rev B to Rev C printed circuit boards.
FROM TO
74LS399 74LS157
A10 A10
B10 C10
C10 E10
D10 B/C10
E10 D/E10
F10 F/H10
74LS374
B10
D10
74LS174
F10
V2 #5
Atari Asteroids E-Prom Kit
Players incresed skill levels may cause excessive game times. If you have
this problem, Atari has a solution. You may purchase an E-PROM kit which
will:
1) Allow small saucer to use wrap-around feature,
2) Allow small saucer to fire immediately when entering the playing area,
and
3) Prevent the intermittent loss of 3rd initial on 10th highest score.
There are 2 special part numbers depending upon which dash number ROM is
currently in the game:
ROM in PCB E-PROMS Kit P/N Description Parts Replaced
-01 08-0303009 035127-02 035127-01
035143-02
035143-01
034144-04E
035144-01
034145-04E
035145-01
-02 08-0303008 035144-04E 035144-02
035145-04E
035145-02
V2 #9
Atari Asteroids IC Part Number Change (& Missile Command)
Ther are 3) 74LS32's specified for locations N6, B9 and M5 on the main logic
board for Asteroids. You may find these devices marked C014362. These
devices are 74LS32's, but were originally purchased for another application
and consequently assigned a different part number.
(J-7 on Missile Command)
***********************
I've only got Volumes 1 & 2 with me at the moment & no time to look at the
old CDR version.
Here is a index of the rest...
Volume 3 #1 (Switch maint)
Volume 3 #5 (troubleshooting tips)
Volume 4, # 1 (display problems)
#3 (tech tips)
I will also try to go thru my Atari Coin Connection collection, some of this
tips (actually most of the STJ tips) are found here originally.
I sent a PDF of the Rate Multiplier that is discussed on the vectorlist to
Jess tonight.
>Here's the GIF of the STJ article from V3 #5.
Picture Attachments:
Received on Thu Feb 4 18:29:56 1999
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