Search found 1060 matches
- Sun Jul 30, 2017 12:44 pm
- Forum: Programming
- Topic: Stable Raster Interrupts
- Replies: 34
- Views: 13892
Re: Stable Raster Interrupts
you can only shift it by 1 cycle minimum
- Sat Jul 29, 2017 9:25 am
- Forum: General Topics
- Topic: GandALF, substitute for the MOS 325572-01
- Replies: 49
- Views: 7241
Re: GandALF, substitute for the MOS 325572-01
Then you replied to what I said to him by mentioning 8 MHz is also extremely slow by today's standards. Ergo, you disagree with me and you're saying it is feasible to run a software emulation of the VIC-II in the same manner. Are you? i said that it is slow by todays standards. no more no less. all...
- Sat Jul 29, 2017 4:26 am
- Forum: General Topics
- Topic: GandALF, substitute for the MOS 325572-01
- Replies: 49
- Views: 7241
Re: GandALF, substitute for the MOS 325572-01
yeah sure, you are right. as always (it wasnt me who started with the "offtopic". nor did cbmeeks specifically nail it on software emulation.)
- Fri Jul 28, 2017 5:49 pm
- Forum: General Topics
- Topic: GandALF, substitute for the MOS 325572-01
- Replies: 49
- Views: 7241
Re: GandALF, substitute for the MOS 325572-01
do you realise that you are the only one trying to nail this on software emulation?
- Fri Jul 28, 2017 5:08 pm
- Forum: General Topics
- Topic: GandALF, substitute for the MOS 325572-01
- Replies: 49
- Views: 7241
Re: GandALF, substitute for the MOS 325572-01
The VIC-I has a dot clock of about 4MHz, the VIC-II has a dot clock around 8 MHz. The SID can be emulated by software on a uC board because by today's standards 1 MHz is extremely slow. 8MHz are no less slow by todays standards really. The reason for why SID is relatively easy to do compared to a V...
- Fri Jul 28, 2017 8:53 am
- Forum: General Topics
- Topic: GandALF, substitute for the MOS 325572-01
- Replies: 49
- Views: 7241
Re: GandALF, substitute for the MOS 325572-01
one major problem is that in a C64 (unlike in many other systems) the VIC plays an integral role in the system, when it doesnt work (at least halfway) right, then *nothing* works. you must get all the external timing perfectly right before you can even try it out in a C64 - in practise that means fi...
- Fri Jul 28, 2017 8:01 am
- Forum: General Topics
- Topic: GandALF, substitute for the MOS 325572-01
- Replies: 49
- Views: 7241
Re: GandALF, substitute for the MOS 325572-01
The VIC-I and VIC-II are a really special case because they incorporate both digital and analog electronics technology. there is very little analog stuff in either. if you make the replacement generate for example HDMI instead of analog video, then you can eliminate all of that. (and even if you do...
- Wed Jul 26, 2017 6:26 am
- Forum: General Topics
- Topic: GandALF, substitute for the MOS 325572-01
- Replies: 49
- Views: 7241
Re: GandALF, substitute for the MOS 325572-01
drop-in replacement havent been done because a) they are even harder to do than a complete FPGA core (you must meet external timing at all times) and b) they would be quite expensive (likely more expensive than real chips)
- Sun Jul 23, 2017 6:27 am
- Forum: General Topics
- Topic: GandALF, substitute for the MOS 325572-01
- Replies: 49
- Views: 7241
Re: GandALF, substitute for the MOS 325572-01
so where is said documentation?This was not done with the idea that I would sell a lot of them but rather with documenting this chip and understanding what goes on at the lower level of the 1541.
- Wed Jul 19, 2017 3:04 pm
- Forum: Hardware and Tech
- Topic: Anyway to test cassette read signals?
- Replies: 3
- Views: 1168
Re: Anyway to test cassette read signals?
write some test programs and submit them to the VICE repo!
perhaps you can take enthusis "minimal head align" (check csdb) and port it over to the VIC20... at least you should be able to see if something is terribly broken with this
perhaps you can take enthusis "minimal head align" (check csdb) and port it over to the VIC20... at least you should be able to see if something is terribly broken with this
- Mon Jul 17, 2017 6:19 am
- Forum: Other Systems
- Topic: The Ultimate-64
- Replies: 9
- Views: 3181
Re: The Ultimate-64
ours has that alreadyA built in megacart clone would be cool too
- Sun Jul 16, 2017 6:51 am
- Forum: Other Systems
- Topic: The Ultimate-64
- Replies: 9
- Views: 3181
Re: The Ultimate-64
the core on the mist is totally different - we have our own. it will then mostly likely get all the features that the chameleon core does have right now (turbo, 1541 emulation, cartridges etc) Sounds great with a VIC20 core but the physical board would need to be different as well to fit in a VIC20 ...
- Sat Jul 15, 2017 9:02 am
- Forum: Other Systems
- Topic: The Ultimate-64
- Replies: 9
- Views: 3181
Re: The Ultimate-64
The C64Reloaded MK3 will also come soonish.... and we DO have a VIC20 core
- Thu Jul 06, 2017 8:09 am
- Forum: Programming
- Topic: Vic-20 mouse driver & demo program for NEOS mouse
- Replies: 54
- Views: 29717
Re: Vic-20 mouse driver & demo program for NEOS mouse
i have a NEOS mouse here now....and i can tell two things for sure: - mouse cheese does neither use, nor even check, the left mouse button - the left mouse button IS connected to fire, just like vice used to emulate it (and i am right now putting that back into VICE) really curious now how you came ...
- Wed Jun 28, 2017 3:39 pm
- Forum: Hardware and Tech
- Topic: VIA CA2 interrupt
- Replies: 5
- Views: 1077
Re: VIA CA2 interrupt
if you find out that it actually matters.... please say so (and perhaps report a bug on the vice tracker)