Search found 1067 matches
- Tue Apr 24, 2018 11:18 am
- Forum: General Topics
- Topic: I got a Commodore Vic-20
- Replies: 20
- Views: 10554
Re: I got a Commodore Vic-20
there is no evidence for either, neither that it "works" nor that it does not. it'd also be hard to produce such evidence :) (anecdotes do not help) however, its undeniable fact that a circuit like this is relatively slow, and would expose the output to high(er) voltage much longer than de...
- Tue Apr 24, 2018 9:13 am
- Forum: General Topics
- Topic: I got a Commodore Vic-20
- Replies: 20
- Views: 10554
Re: I got a Commodore Vic-20
But is there any product you recommend we use that is new? not a specific product. i am using a C128 PSU myself, which is quite a bit better than the C64 powerbricks. should that ever fail, i'd probably just build a replacement myself :) a good DIY variant for ppl without any electronics knowledge ...
- Mon Apr 23, 2018 5:15 pm
- Forum: General Topics
- Topic: I got a Commodore Vic-20
- Replies: 20
- Views: 10554
Re: I got a Commodore Vic-20
that doesnt make this circuit any better really no doubt he has published some good stuff - but there is no doubt some of the things he made are a bit questionable either.US Army trained and was dealing with electronics before most of us were born.
- Mon Apr 23, 2018 10:56 am
- Forum: General Topics
- Topic: I got a Commodore Vic-20
- Replies: 20
- Views: 10554
Re: I got a Commodore Vic-20
ah modern circuit should have a crowbar circuit to prevent overvoltage on failure... even THAT can not be fast enough in some situations, but a relay certainly isnt. a relay based circuit can only ever protect against overvoltage which raises relatively slow while the PSU is being used - however the...
- Sun Apr 22, 2018 2:07 pm
- Forum: Emulation and Cross Development
- Topic: UDGs on 8 Kb+ expanded
- Replies: 12
- Views: 7655
Re: UDGs on 8 Kb+ expanded
conio is optimized portable console output, so it doesnt understand any of the petscii control codes... if you want that, use stdio functions, putchar() would be the function that can do it. that said, its probably a better idea to write to the respective VIC registers directly (someone else can pro...
- Sat Apr 21, 2018 3:57 pm
- Forum: Hardware and Tech
- Topic: VIA 1 CA2 behaviour when switching from output to input
- Replies: 10
- Views: 4833
Re: VIA 1 CA2 behaviour when switching from output to input
indeed it is. there should be a separate test program just for this =P
- Sat Apr 21, 2018 3:24 pm
- Forum: Hardware and Tech
- Topic: VIA 1 CA2 behaviour when switching from output to input
- Replies: 10
- Views: 4833
Re: VIA 1 CA2 behaviour when switching from output to input
i guess we really need 1541 versions of those tests (ie its not really a VIA emulation thing - its a VIC20 specific thing here)
- Thu Apr 19, 2018 1:44 pm
- Forum: Hardware and Tech
- Topic: Mega-Cart
- Replies: 695
- Views: 187308
Re: Mega-Cart
he just had is regular outburst and ragequit over some silly argument on IRC. he'll be back in a year or so. its not the first time this happened
- Tue Apr 17, 2018 8:49 am
- Forum: General Topics
- Topic: I got a Commodore Vic-20
- Replies: 20
- Views: 10554
Re: I got a Commodore Vic-20
is that Sav64 the placebo thing that will safely cut the power with a relay.... a couple hundred microseconds after the C64 was fried? that said, yeah, dont use the old PSUs. dont use those silly "saver" circuits either. a plain simply new modern PSU will do the trick (even more so for the...
- Wed Apr 04, 2018 11:35 am
- Forum: General Topics
- Topic: ** Revision 2018 Invitation / Website
- Replies: 11
- Views: 5886
Re: ** Revision 2018 Invitation / Website
as usual, managed to miss most ppl i was looking for =P
- Wed Apr 04, 2018 11:31 am
- Forum: Programming
- Topic: Amen brother ~ 6 bit audio @ 16.3kHz
- Replies: 34
- Views: 6735
Re: Amen brother ~ 6 bit audio @ 16.3kHz
what funky assembler is that?
- Tue Mar 20, 2018 12:29 pm
- Forum: Emulation and Cross Development
- Topic: x86 -> 6502 reassembler
- Replies: 2
- Views: 4523
Re: x86 -> 6502 reassembler
in most non trivial code all the fancy optimizations will get lost in the x86->6502 translation and you'll end up with code similar to what cc65 produces
- Mon Mar 12, 2018 9:51 pm
- Forum: Other Systems
- Topic: Plus/4 joystick adapter
- Replies: 13
- Views: 9184
Re: Plus/4 joystick adapter
perhaps even try higher values... you shouldnt need much current (almost none) afterall
and yes 15 years ago it was easy to get deals like that... i wish i had got myself a stack of plus4 and vic20 too.... i only got a dozen C64s and drives
and yes 15 years ago it was easy to get deals like that... i wish i had got myself a stack of plus4 and vic20 too.... i only got a dozen C64s and drives
- Mon Mar 12, 2018 7:24 pm
- Forum: Hardware and Tech
- Topic: RAM expansion cross-talk issues (split from: Bitshifter's Z-code interpreter)
- Replies: 51
- Views: 14087
Re: RAM expansion cross-talk issues
you cant rely on those testers, not seldomly oldish chips work fine in a tester that only puts very slow signals on a chip, but on a mhz or two it fails
- Mon Mar 12, 2018 7:19 pm
- Forum: Other Systems
- Topic: Plus/4 joystick adapter
- Replies: 13
- Views: 9184
Re: Plus/4 joystick adapter
i'd perhaps even use 470Ohm - but looks OK to me