... which confirms my later edit. Your DRAM expander does not introduce wait states for the CPU.pallas wrote:I was thinking the same: is my ram expansion slower? Here is the screenshot: [...]
Search found 4648 matches
- Tue May 14, 2013 10:01 am
- Forum: Hardware and Tech
- Topic: vic-1110 8k ram cart upgrade (and other solutions)
- Replies: 59
- Views: 10767
- Tue May 14, 2013 9:55 am
- Forum: Programming
- Topic: CBM BASIC 2.0 using STR$
- Replies: 12
- Views: 1884
You can use MID$(STR$(...),2) to strip off the first character of the numeric string. The blank character serves as placeholder for the minus sign, so negative numbers wouldn't disturb the layout. And the conversion of numbers in the range 0 .. 255 into a two-digit hex string can be expressed somewh...
- Mon May 13, 2013 10:44 am
- Forum: Hardware and Tech
- Topic: vic-1110 8k ram cart upgrade (and other solutions)
- Replies: 59
- Views: 10767
- it has dynamic ram instead of static It would be interesting to know if the DRAM refresh introduces wait cycles. The program MG Raster employs a cycle exact interrupt to change the VIC registers several times on each line, and during the visible part of the screen it relies upon that there are 71...
- Mon May 13, 2013 10:33 am
- Forum: Games
- Topic: Looking for some recommendations..
- Replies: 6
- Views: 1292
- Sun May 12, 2013 3:05 pm
- Forum: Programming
- Topic: MINIGRAFIK batch processing suite
- Replies: 55
- Views: 49850
Another one for a rainy Sunday - the rendition of a broken Penrose tribar with MINIGRAFIK: ( download ) https://dateipfa.de/.Public/denial/images/minigrafik/tribar.png Here's the listing. The assignment 'A=5/3' in line 11 refers to PAL, NTSC users should replace it with 'A=3/2' to compensate for the...
- Mon May 06, 2013 2:39 pm
- Forum: Hardware and Tech
- Topic: How do I Remove the VIC 6560 chip
- Replies: 9
- Views: 1596
- Mon May 06, 2013 10:34 am
- Forum: Hardware and Tech
- Topic: How do I Remove the VIC 6560 chip
- Replies: 9
- Views: 1596
One is working through composite video. O.K. I read about that one in another thread. At first, let's assume the modulator is at fault here, and concentrate on the two defective VIC-20s. All use two prong power supply. I have multimeter [...] I suppose the fuse is in order. With voltage measurement...
- Sun May 05, 2013 12:54 pm
- Forum: Hardware and Tech
- Topic: How do I Remove the VIC 6560 chip
- Replies: 9
- Views: 1596
You could (have) use(d) IC extraction tools that can grip longer chips from both sides, and wiggle until the chip pops out. As a rule of thumb, you should test a suspected defective chip in a functioning unit (i.e., VIC-20) - never the other way round. If there's something that killed your VIC in yo...
- Thu May 02, 2013 10:14 am
- Forum: Hardware and Tech
- Topic: My hardware project :: GCart 2011
- Replies: 154
- Views: 89755
However, I haven't given up on this, and now and then I spend time on it. Well then, I also have my share on unfinished projects on the VIC-20. ;) Of course there's no fixed deadline for hobbyist projects (unless there's something like a demo-party and you want to attend a compo with the result of ...
- Wed May 01, 2013 11:20 pm
- Forum: Hardware and Tech
- Topic: My hardware project :: GCart 2011
- Replies: 154
- Views: 89755
So, one year after my last post in this thread, how's the progress? I was somehow disappointed that, IMO, the project went into a mix of hibernation and creepy featurism instead of producing a working prototype that could also be tested by other people. :? For me, the most interesting aspects were t...
- Wed May 01, 2013 3:59 pm
- Forum: Announcement Board
- Topic: VIC-20 Software Releases of 2013
- Replies: 40
- Views: 50351
Name: Munching Squares Author: Mike Released: May 1, 2013 Requirements: VIC-20 with +8K RAM expansion, disk or tape Description: Display hack Screenshot: https://dateipfa.de/.Public/denial/images/minigrafik/munching_squares.png Download: munching_squares.zip Read more and discuss Munching Squares he...
- Wed May 01, 2013 3:53 pm
- Forum: Programming
- Topic: MINIGRAFIK batch processing suite
- Replies: 55
- Views: 49850
Today I ported a display hack over to the VIC-20, which I had originally programmed on the C128 some 25 years ago. Its name, 'Munching Squares', is an hommage to a similar program which saw the light of day on the PDP-10 as early as 1962! Here's the BASIC source. The *.d64 file ( download ) features...
- Mon Apr 29, 2013 11:45 am
- Forum: Programming
- Topic: MINIGRAFIK batch processing suite
- Replies: 55
- Views: 49850
I wonder if given an unlimited size drive of some sort what sort of video you could get out of the vic20. Obviously it would be RAW, but what is the best resolution you could come up with? Or even with 24k of ram, maybe a looping animation. Feel free to try it out. I don't own a monopoly on graphic...
- Sun Apr 28, 2013 2:32 pm
- Forum: Programming
- Topic: MINIGRAFIK batch processing suite
- Replies: 55
- Views: 49850
- Sun Apr 28, 2013 12:48 pm
- Forum: Announcement Board
- Topic: VIC-20 Software Releases of 2013
- Replies: 40
- Views: 50351