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by Mike
Thu Feb 22, 2018 6:54 am
Forum: Other Systems
Topic: Stroboscopes: why smartphone LED can't blink fast?
Replies: 9
Views: 66

Re: Stroboscopes: why smartphone LED can't blink fast?

[...] the OS runs on a hex-core 64bit CPU at 2 GHz [...] The CPU could even run at infinite speed: when a resource is locked it can't do anything about this. And then it waits... and waits... and waits... until the resource is available, and then the locked thread/process can continue. That's a pro...
by Mike
Thu Feb 22, 2018 5:15 am
Forum: Other Systems
Topic: Stroboscopes: why smartphone LED can't blink fast?
Replies: 9
Views: 66

Re: Stroboscopes: why smartphone LED can't blink fast?

Mike, of course when the LED is used as a stroboscope it's not driven at high power as when used as a flash unit. "Of course"? Can you really be sure that the app isn't misusing the presumably faster response of the LED when it is triggered as flash? [...] the smartphone also has a factor...
by Mike
Wed Feb 21, 2018 5:55 pm
Forum: Games
Topic: TNT's Z-code interpreter, and FE3
Replies: 70
Views: 20187

Re: TNT's Z-code interpreter, and FE3

Hi, Bit Shifter! It's nice to see your Z-code interpreter is going to have an 'official' release at last. :D It's really a screenshot from VICE emulating the VIC-20, not a fake or C64 shot. Bitmap-hosted font engines (monospaced or proportional) have been used in several releases here on Denial, so ...
by Mike
Wed Feb 21, 2018 5:43 pm
Forum: Other Systems
Topic: Stroboscopes: why smartphone LED can't blink fast?
Replies: 9
Views: 66

Re: Stroboscopes: why smartphone LED can't blink fast?

highinfidelity, LEDs used for lighting purposes are not anymore those "cold solid state components" you think of - rather, cooling efforts are necessary to dissipate excess heat: their efficiency is still less than 100%, and we're dealing with >1 W of electrical power already. Furthermore,...
by Mike
Wed Feb 21, 2018 1:42 am
Forum: Programming
Topic: Vic Compiler Program
Replies: 1
Views: 98

Re: Vic Compiler Program

I took a quick peek. It's most probably the same breed of Tiny BASIC compiler that has been discussed in the thread ' Should these tapes be archived? ', and to quote from there: Apparently, this only compiles mathematical programs, like the sample provided within the program. It won't compile full b...
by Mike
Sun Feb 18, 2018 3:12 pm
Forum: Hardware and Tech
Topic: reset button
Replies: 8
Views: 153

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: 153

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: 153

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: 4966

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: 194

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: 194

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: 194

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: 17480

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: 258

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: 396

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...

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