Search found 2980 matches

by Mike
Sun Feb 18, 2018 3:12 pm
Forum: Hardware and Tech
Topic: reset button
Replies: 8
Views: 141

Re: reset button

i have done this mods when i was young on my Vic 20 and my CBM 8032, but as i know how to solder.... i'll solder a reset button following the pictures. O.K. :) I mean VDD not VCC , RESET is active when low.... i remember From your first post, mentioning pins #1 and #40 of the 6502, you would have c...
by Mike
Sun Feb 18, 2018 12:20 pm
Forum: Hardware and Tech
Topic: reset button
Replies: 8
Views: 141

Re: reset button

Just for you to know: /RESET is low-active, i.e. the reset pin needs to be set to low level, not high level (Vcc) to make a reset. As a rule of thumb: if you need to ask someone else where to solder inside a computer, because you cannot infer this for yourself from schematics and data sheets, in sho...
by Mike
Sun Feb 18, 2018 5:33 am
Forum: Hardware and Tech
Topic: reset button
Replies: 8
Views: 141

Re: reset button

No. You are supposed to first identify the type of your mainboard (VIC-20 or VIC-20CR), and then apply the solder job corresponding to your type of the mainboard.

If you're unsure how to proceed, you're better off with a user-port reset switch.
by Mike
Sat Feb 17, 2018 5:02 pm
Forum: Programming
Topic: Fun with CBM arithmetics
Replies: 26
Views: 4941

Re: Fun with CBM arithmetics

Regards your question of a feasible file format: you'd most probably be content with a *.prg file that executes the patch by copying the original ROM contents, doing a check whether it works on the original byte values it aims to replace, and putting the replacement bytes there. Much similar to how ...
by Mike
Tue Feb 13, 2018 9:36 am
Forum: Hardware and Tech
Topic: Which memory expansions with more than +37K are you using?
Replies: 11
Views: 190

Re: Which memory expansions with more than +37K are you using?

Be ready to have nuclear fusion explained in detail by Mike :mrgreen: Awww! Don't spoil the fun for me! ;) In any case, I pointed pixel to the home page of my employer already some time ago. :) As long as I can make him hate me, too. ;) Unlikely. Someone needs to be obliged as aide for developing p...
by Mike
Tue Feb 13, 2018 8:01 am
Forum: Hardware and Tech
Topic: Which memory expansions with more than +37K are you using?
Replies: 11
Views: 190

Re: Which memory expansions with more than +37K are you using?

das Kamener Kreuz am Bande Muaharhar! Den kannte ich noch nicht. :lol: so that's why my MegaCart settings keep getting corrupted :x Should be easy to find out the culprit. For now, there are not too many candidates out there. While we're at this ... http://sleepingelephant.com/ipw-web/bulletin/bb/v...
by Mike
Tue Feb 13, 2018 6:42 am
Forum: Hardware and Tech
Topic: Which memory expansions with more than +37K are you using?
Replies: 11
Views: 190

Re: Which memory expansions with more than +37K are you using?

Yet another memory expansion poll? :lol: Main issue: an application program is not supposed to do any accesses into I/O 2/3, for whatever reason. You have no way to ensure, whether there is RAM, ROM, or read/write sensitive I/O which can do anything else than store data. It could perform a reset, ch...
by Mike
Sun Feb 11, 2018 5:54 am
Forum: Programming
Topic: MINIGRAFIK batch processing suite
Replies: 50
Views: 17469

Re: MINIGRAFIK batch processing suite

A tool to import save files from Commodore Artist has been released over there in the "Collecting and History" section, in the thread "Commodore Artist Save Files".
by Mike
Sun Feb 11, 2018 5:03 am
Forum: Collecting and History
Topic: Commodore Artist Save Files
Replies: 3
Views: 253

Re: Commodore Artist Save Files

Whether they have been stored 10 years or 35 years shouldn't make any difference, as long as that was done in a room with moderate climate, i.e. not too big temperature changes, not too dry, not too wet. Preferably in a cardboard box (not plastic), so there's at least some air exchange possible. ......
by Mike
Wed Feb 07, 2018 1:32 am
Forum: Programming
Topic: Counting "trick"/memory copy
Replies: 4
Views: 386

Re: Counting "trick"/memory copy

I found a nice collection of memory move routines on 6502.org: Practical Memory Move Routines . Here are some reasonably fast general-purpose routines for moving blocks of memory. You simply specify the address to move from, the address to move to, and the size of the block. [...] These routines are...
by Mike
Tue Feb 06, 2018 3:34 am
Forum: General Topics
Topic: Warning : Your VIC is now clasified as a Lethal Weapon!
Replies: 16
Views: 488

Re: Warning : Your VIC is now clasified as a Lethal Weapon!

Radical Brad wrote:Perhaps one day I may join the expanding list of now 38 DIY nuclear reactor creators.

DIY nuclear fission reactors are sooo 70'ies. :lol:

Ya need the blue print for a Fusion Power Plant? Look here: ITER. :mrgreen:
by Mike
Sun Feb 04, 2018 7:04 am
Forum: Programming
Topic: MINIGRAFIK lineart
Replies: 16
Views: 684

Re: MINIGRAFIK lineart

Nice one!

Though, it can be written slightly more compact like thus: :wink:

Code: Select all

1 DIMD(4):D(1)=1:D(3)=-1:X=80:Y=96:@ON:@CLR
2 C=@(X,Y):D=(D+2*C-1)AND3:@1-C,X,Y:X=X+D(D):Y=Y+D(D+1):GOTO2

Cheers,

Michael
by Mike
Sun Feb 04, 2018 2:48 am
Forum: Collecting and History
Topic: Commodore Artist Save Files
Replies: 3
Views: 253

Re: Commodore Artist Save Files

Welcome back to Denial, Bill! :) I have VICE and Commodore Artist, so I was thinking that perhaps I could record the drawing save files as a .WAV then convert them to a .TAP and attempt to load them into CA. I'm not sure if that would work though, as the save files aren't "normal" programs...
by Mike
Fri Feb 02, 2018 11:11 am
Forum: Emulation and Cross Development
Topic: VICE - Write to Cart Image Possible?
Replies: 12
Views: 262

Re: VICE - Write to Cart Image Possible?

Radical Brad wrote:Once I get through this initial video hardware development stage, I will take the time to study the Kernal in more detail, possibly leveraging more of what is has to offer. Logic development is going to take me the rest of this year for sure.

That sounds like a plan. :)

Good luck! :D
by Mike
Fri Feb 02, 2018 8:24 am
Forum: Emulation and Cross Development
Topic: VICE - Write to Cart Image Possible?
Replies: 12
Views: 262

Re: VICE - Write to Cart Image Possible?

My hardware does do something that may not be achievable in VICE though. From the viewpoint of VICE, like it is with the VIC-20 itself, your hardware appears just like any other cartridge. It just needs a fixed design, a thorough documentation, and an heightened interest of one of the VICE maintain...

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