I was wondering if you set two channels up with the same frequency but 180 degrees out of phase with each other, would changing volume on both channels in tandem produce analogue levels?
Thus leaving 1 noise channel and 1 tone channel free for music?
Search found 322 matches
- Fri Mar 23, 2012 1:45 am
- Forum: Programming
- Topic: Digitized sound + 2 spare channels possible?
- Replies: 11
- Views: 3814
- Wed Mar 21, 2012 9:24 pm
- Forum: Collecting and History
- Topic: Does anyone know what this might be?
- Replies: 12
- Views: 3344
- Sat Mar 03, 2012 3:14 am
- Forum: Hardware and Tech
- Topic: 6561 Initialisation
- Replies: 23
- Views: 3981
- Fri Mar 02, 2012 3:19 am
- Forum: Hardware and Tech
- Topic: 6561 Initialisation
- Replies: 23
- Views: 3981
- Sun Feb 19, 2012 11:48 pm
- Forum: International VIC
- Topic: VIC-1001 Price?
- Replies: 3
- Views: 2602
- Sun Feb 19, 2012 3:45 pm
- Forum: Hardware and Tech
- Topic: screen not quite right
- Replies: 10
- Views: 1858
- Wed Feb 01, 2012 5:47 pm
- Forum: Collecting and History
- Topic: Vintage photos of Vic20 set-ups wanted
- Replies: 9
- Views: 3041
- Sat Jan 28, 2012 2:13 am
- Forum: Collecting and History
- Topic: Vintage photos of Vic20 set-ups wanted
- Replies: 9
- Views: 3041
Vintage photos of Vic20 set-ups wanted
Hi guys,
Would those of you with pictures of your Vic20 set-ups from the 80's, please post your pics. I want to fill in the white-space in my emulator, and want to see what sort of things kids had round their machines in the good old days.
Would those of you with pictures of your Vic20 set-ups from the 80's, please post your pics. I want to fill in the white-space in my emulator, and want to see what sort of things kids had round their machines in the good old days.
- Sat Jan 21, 2012 2:11 pm
- Forum: Hardware and Tech
- Topic: 6522 port B question
- Replies: 1
- Views: 600
6522 port B question
I have a game that has set:
DDRB: 255
ORB: 247
And the Port B input is 0.
If I read IRB, what value should I expect?
I was expecting 247 as all bits are configured as outputs, is this correct?
DDRB: 255
ORB: 247
And the Port B input is 0.
If I read IRB, what value should I expect?
I was expecting 247 as all bits are configured as outputs, is this correct?
- Mon Jan 16, 2012 6:59 pm
- Forum: Programming
- Topic: Looking for Vic20 Kernel ROM disassembly
- Replies: 11
- Views: 3453
Could I put a copy up on my site in the reference section of http://www.mdawson.net/vic20chrome/vic20.php ?
Or could you host a copy that's not in a ZIP that I could put a reference to?
Or could you host a copy that's not in a ZIP that I could put a reference to?
- Fri Jan 13, 2012 3:18 pm
- Forum: Games
- Topic: WIP: Dream
- Replies: 24
- Views: 10165
- Fri Jan 13, 2012 3:16 pm
- Forum: Games
- Topic: WIP: Dream
- Replies: 24
- Views: 10165
Ah, it wasn't my joystick code, it was the random number generator on the vic doesn't work if the via timers init at 0. As the random number generator uses uninitialised memory on startup. Fixed now.
http://www.mdawson.net/vic20chrome/vic2 ... /dream.prg
http://www.mdawson.net/vic20chrome/vic2 ... /dream.prg
- Fri Jan 13, 2012 2:46 pm
- Forum: Games
- Topic: WIP: Dream
- Replies: 24
- Views: 10165
- Fri Jan 13, 2012 1:25 pm
- Forum: Games
- Topic: WIP: Dream
- Replies: 24
- Views: 10165
- Fri Jan 13, 2012 1:20 pm
- Forum: Games
- Topic: WIP: Dream
- Replies: 24
- Views: 10165