Comments for JAMMArcade.net

Comment on Jumping to Rainbow Islands part 4 by davewellington

davewellington — Wed, 22 Feb 2012 03:24:30 +0000

Great blog mate, I check it every now and then and am always happy to see more content

Comment on Jumping to Rainbow Islands part 4 by Karadoc

Karadoc — Sun, 19 Feb 2012 22:07:34 +0000

Facinating. Thanks for sharing!

Comment on Pole Position PAL by porchy

porchy — Sun, 12 Feb 2012 19:40:00 +0000

Brilliant stuff, thanks a lot

Comment on Pole Position PAL by mrdo

mrdo — Sun, 12 Feb 2012 19:20:09 +0000

Here is pp 2n .

Name Poleposition 2n;
Device g16v8as;

/* Dedicated input pins */

pin 1 = I0;
pin 2 = I1;
pin 3 = I2; /* Unused input */
pin 4 = I3;
pin 5 = I4;
pin 6 = I5;
pin 7 = I6;
pin 8 = I7;
pin 9 = I8;
pin 11 = I9;

/* Input and/or bidirectional pins */
pin 12 = B0;
pin 19 = B7;
/* Dedicated output pins */

pin 13 = B1;
pin 14 = B2;
pin 15 = B3;
pin 16 = B4;
pin 17 = B5;
pin 18 = B6;

* Output and output enable equations */

!B6 = I1 & !I3 & !I4 & I6 & !I9
# I1 & !I3 & I4 & I6 & !I9
# I1 & !I3 & !I4 & I6 & I9;
!B5 = I1 & !I3 & !I5 & !I6 & I7 & I8 & !B0;
!B4 = !I0 & I1 & !I3 & I6 & !B7
# !I0 & I1 & !I3 & I6 & B7
# I0 & I1 & !I3 & I6 & B7;
!B3 = I1 & !I3 & I5 & !I6 & I7;
!B2 = I1 & !I3 & I5 & !I6 & !I7;
!B1 = I1 & !I3 & !I4 & I6 & !I9
# I1 & !I3 & !I4 & I6 & I9
# I1 & !I3 & I4 & I6 & I9;

It works ….

/* Dedicated output pins */

pin 13 = B1;
pin 14 = B2;
pin 15 = B3;
pin 16 = B4;
pin 17 = B5;
pin 18 = B6;

/* Output and output enable equations */

Comment on Pole Position PAL by porchy

porchy — Sun, 12 Feb 2012 18:43:53 +0000

Thats pretty much what I ended up with only i used a XOR on pin 14 (cmos ram chipselect) instead of an OR, same functionality just a different way of doing it.
Thanks for posting anyway, I didnt want to post up the the equations I was working on as they were not my own work.

Comment on Pole Position PAL by mrdo

mrdo — Sun, 12 Feb 2012 18:29:35 +0000

/* Dedicated input pins */
pin 1 = I0;
pin 2 = I1;
pin 3 = I2;
pin 4 = I3;
pin 5 = I4;
pin 6 = I5;
pin 7 = I6;
pin 8 = I7;
pin 9 = I8;
pin 11 = I9;

/* Dedicated output pins */
pin 12 = B0;
pin 13 = B1;
pin 14 = B2;
pin 15 = B3;
pin 16 = B4;
pin 17 = B5;
pin 18 = B6;
pin 19 = B7;

/* Output and output enable equations */

!B7 = !I0 & I1 & !I2 & I3 & !I8;
!B6 = I0 & !I1 & !I2 & I3 & !I8;
!B5 = !I0 & !I1 & !I2 & I3 & !I8;
!B4 = I3 & !I4 & I5;
!B3 = I2 & !I3 & !I4 & I5;
!B2 = I0 & I1 & !I2 & !I3 & !I4 & I5 & I6 & !I7
# I0 & I1 & !I2 & !I3 & !I4 & I5 & !I6 & I7;
!B1 = !I0 & I1 & !I2 & !I3 & !I4 & I5 & !I9
# I0 & !I1 & !I2 & !I3 & !I4 & I5 & I9;
!B0 = !I0 & !I1 & !I2 & !I3 & !I4 & I5 & !I9
# I0 & !I1 & !I2 & !I3 & !I4 & I5 & !I9
# !I0 & !I1 & !I2 & !I3 & !I4 & I5 & I9;

Pole Position 7C – works

Comment on Comments by Silvio

Silvio — Sun, 12 Feb 2012 10:19:30 +0000

I am very fascinated by your site, many thanks!

Comment on Commodore Plus/4 by porchy

porchy — Thu, 26 Jan 2012 18:19:33 +0000

i think i got a pretty good deal on it. prices (ebay) seem to be going a little crazy on retro stuff at the moment

Comment on Commodore Plus/4 by szu

szu — Thu, 26 Jan 2012 17:41:21 +0000

Nice find! hope you got good deal on it, you deserve it

Comment on Commodore Plus/4 by StiGGy

StiGGy — Tue, 24 Jan 2012 19:52:00 +0000

Looking good there, have always like the Plus/4, especially those funky cursor keys and woot woot, reset button for all those game POKES. I like the fact that the c64 PSU adaptor looks to be ian easy swapout and am tempted to do this myself as it would be great to use just one PSU for the c16,c64, plus/4 and Vic 20.