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!rm76
$1.50

Volume 2 -- Issue 6                          March, 1982


In This Issue...

Reading Two Paddles at the Same Time . . . . . . . . . . .  1
Circulation and Advertising Rates  . . . . . . . . . . . .  1
S-C Macro Assembler  . . . . . . . . . . . . . . . . . . .  3
EPROM Blaster Defined  . . . . . . . . . . . . . . . . . .  9
Correction to Kassel's FIFO Handler  . . . . . . . . . . .  9
A Review of Amper-Magic  . . . . . . . . . . . . . . . . . 10
More About the EPSON Interface . . . . . . . . . . . . . . 14
The Other EPSON Manual (A Review)  . . . . . . . . . . . . 15
Tricky Code that Always Skips  . . . . . . . . . . . . . . 17
Using the Applied Engineering  . . . . . . . . . . . . . . 19
Leventhal's 6502 Subroutines (A Review)  . . . . . . . . . 23
Reading Two Paddles (program)  . . . . . . . . . . . . . . 24


Reading Two Paddles at the Same Time.......Bob Sander-Cederlof

You may have discovered by now that if you try to read both game paddles from BASIC, there is some interaction at certain ranges.  The problem is that there is only one trigger for both (really, all four) analog ports.  If one of them times out long enough before the other one, you will read the tail end of the count on the second timer.

I wrote a little subroutine (see back page) which reads both paddles at once, eliminating all interaction.  It also stretches the range, meaning you need a higher resistance than the standard paddles to get a full 0-255 counting range.  Programs which use both paddles will run faster using this subroutine, because you get two readings in the time of one.


Circulation and Advertising Rates

Now that circulation is over 1000 copies per month, it seems appropriate to charge more per page for advertising than I did when there were only 100 to 200 subscribers.  The new rate, effective immediately, is $30 for a full page, $15 for a half page.
