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by Mike
Tue Sep 26, 2017 12:35 pm
Forum: General Topics
Topic: Utimem or Final Expansion?
Replies: 16
Views: 398

Re: Utimem or Final Expansion?

So the then we get into the crux of the matter. Every VIC20 has an expansion port. Outside the US many VIC20 owners only have a tape drive. Who told you that nonsense? You can count on that every VIC-20 user actively pursuing this hobby has a feasible mass storage solution at his hands . If someone...
by Mike
Tue Sep 26, 2017 10:34 am
Forum: General Topics
Topic: Utimem or Final Expansion?
Replies: 16
Views: 398

Re: Utimem or Final Expansion?

I'm working on two projects that would be impossible without banking RAM/ROM. How can you be sure about that? Given a much more faster file I/O from SD card (as I wrote, in excess of 100 KB/s), a full RAM expansion, and a little thoughtful working set tuning should be able to give a comparable perf...
by Mike
Tue Sep 26, 2017 3:39 am
Forum: Hardware and Tech
Topic: VIC cartridge PCB eagle
Replies: 18
Views: 476

Re: VIC cartridge PCB eagle

Any comments are welcome. You should consider routing the data lines CD0 and CD1 with vias, and CD3..CD7 between the left-hand side pins of the chip. No reason to copy the original design in that point really. One could easily route a trace between through-hole pins already in those days; nowadays,...
by Mike
Mon Sep 25, 2017 3:13 am
Forum: General Topics
Topic: Utimem or Final Expansion?
Replies: 16
Views: 398

Re: Utimem or Final Expansion?

I beg to differ. First of all, FE3 predates Ultimem by quite a few years (2009 vs. 2015/16), so it's no wonders a few weaknesses of FE3 had been ironed out with Ultimem. The general set-up though shows no big differences: both feature a large, banked SRAM and likewise, Flash-EPROM. Ultimem contains ...
by Mike
Thu Sep 21, 2017 12:16 pm
Forum: Collecting and History
Topic: Two VIC-20 Releases for Gubbdata 2017 ...
Replies: 5
Views: 355

Re: Two VIC-20 Releases for Gubbdata 2017 ...

I wish I had the super-expander or the penultimate so I could try it on my real VIC. :( In the meanwhile, emulation with VICE on a PC is a perfectly legit way to proceed with the files. With real h/w, you'd anyhow either have to transfer the storage images to a floppy disk first, implying use of a ...
by Mike
Thu Sep 21, 2017 5:14 am
Forum: Collecting and History
Topic: Two VIC-20 Releases for Gubbdata 2017 ...
Replies: 5
Views: 355

Re: Two VIC-20 Releases for Gubbdata 2017 ...

I will have to try these out later, I'm always exited to see how people write this software. For everyone who is interested to take a peek at the "Castle" picture within Picasso, I have converted the *.prg file back to Picasso format. The picture consists of two files, "0CASTLE"...
by Mike
Mon Sep 18, 2017 9:03 am
Forum: Programming
Topic: 4ty - 40x25 interlaced text mode on unexpanded VIC 20
Replies: 15
Views: 651

Re: 4ty - 40x25 interlaced text mode on unexpanded VIC 20

You're right, I only need 2k for the charmap as the source map will reside bin bank 3 as it does today with the C64 font.. A full (i.e. 256 characters) single-height character set for the VIC chip requires 2K. If you ever plan to use a full double-height character set, that requires 4K and you have...
by Mike
Mon Sep 18, 2017 7:36 am
Forum: Programming
Topic: 4ty - 40x25 interlaced text mode on unexpanded VIC 20
Replies: 15
Views: 651

Re: 4ty - 40x25 interlaced text mode on unexpanded VIC 20

Once again, how you organize the character definitions as such, and how you provide character generator data to VIC-I are two entirely different matters. From the diagram I'd conclude you plan to put the upper/graphics PETSCII set into the upper nibbles of the character definitions, and the lower/up...
by Mike
Mon Sep 18, 2017 5:35 am
Forum: Programming
Topic: 4ty - 40x25 interlaced text mode on unexpanded VIC 20
Replies: 15
Views: 651

Re: 4ty - 40x25 interlaced text mode on unexpanded VIC 20

For NinjaTerm I would use a full screen bitmap with 8x16 chars, but arranged and wrapped around in a way so that you can scroll the screen very fast. Odd lines can be scrolled up by just changing the value of screen y-position and wiping the top line (8-high). Even lines can be then scrolled up by ...
by Mike
Mon Sep 18, 2017 3:50 am
Forum: Programming
Topic: 4ty - 40x25 interlaced text mode on unexpanded VIC 20
Replies: 15
Views: 651

Re: 4ty - 40x25 interlaced text mode on unexpanded VIC 20

What program did you make that with? I made this with an assorted set of my own tools, mostly C programs: One of them produces a *.pgm file from a text file, using the glyphs of an own font to display 7-bit ASCII. This font has also been used in several other applications, also by other people. It'...
by Mike
Sun Sep 17, 2017 2:06 am
Forum: Collecting and History
Topic: Two VIC-20 Releases for Gubbdata 2017 ...
Replies: 5
Views: 355

Two VIC-20 Releases for Gubbdata 2017 ...

... by Mermaid /GP: splorf_the_hero.zip castle__-mermaid.zip ... as found on scene.org in "/other_gfx" and "/other_music". "Castle" was most probably done in Aleksi Eeben's Picasso, and provided as executable file for unexpanded VIC-20. It made #2 in the compo. "Sp...
by Mike
Sat Sep 16, 2017 12:44 pm
Forum: Programming
Topic: 4ty - 40x25 interlaced text mode on unexpanded VIC 20
Replies: 15
Views: 651

Re: 4ty - 40x25 interlaced text mode on unexpanded VIC 20

reply.zip
(1.48 KiB) Downloaded 14 times

:mrgreen:
by Mike
Sat Aug 26, 2017 10:46 am
Forum: Programming
Topic: Raster split and $9002
Replies: 49
Views: 1067

Re: Raster split and $9002

tokra wrote:(are you listening, Mike?)

Yes.

...

:lol:

(... > off to continue with the new raster paper ... ;) )
by Mike
Sat Aug 26, 2017 2:51 am
Forum: Programming
Topic: 320x200 - a CGA emulator for VIC-20! (+35K RAM req'd)
Replies: 6
Views: 713

Re: 320x200 - a CGA emulator for VIC-20! (+35K RAM req'd)

This would have been a good starting point for my "VIC Hunt"-picture [...] Though it becomes quite cumbersome and confusing to edit the picture in the zoomed view of both fcbpaint and MINIPAINT. Starting from this converted picture ... 01_splatoon.png ... you'll only ever get to see (and ...
by Mike
Fri Aug 25, 2017 2:02 pm
Forum: Programming
Topic: 320x200 - a CGA emulator for VIC-20! (+35K RAM req'd)
Replies: 6
Views: 713

Re: 320x200 - a CGA emulator for VIC-20! (+35K RAM req'd)

This is still a work in progress, and a converter from 4 colour *.ppm files is in the works. Found time this evening to give it a try. Here's a new example picture: splatoon.zip :mrgreen: The converter takes a full-colour 320x200 *.ppm file and does a full optimization for the best 4 colour palette...

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