Search found 2774 matches

by Mike
Wed Aug 16, 2017 12:48 am
Forum: Games
Topic: Scott Adams cart images
Replies: 11
Views: 109

Re: Scott Adams cart images

is there is a canonical list of useful SYS entry points somewhere? The pinned thread ' ROM calls and other tricks ' in the Programming section is a good starting point for sure, even if it's nowhere near an exhaustive list. In the boot loader above, SYS57809 scans the following BASIC program for th...
by Mike
Tue Aug 15, 2017 3:39 pm
Forum: Games
Topic: Scott Adams cart images
Replies: 11
Views: 109

Re: Scott Adams cart images

I guess it should be possible to write a little pre-loader to move screen memory, move BASIC and then chain my main loader program. I'll play with it when I get a chance later ... The only thing really necessary is to move the screen buffer to the position where it resides with an unexpanded VIC-20...
by Mike
Tue Aug 15, 2017 8:18 am
Forum: Games
Topic: Scott Adams cart images
Replies: 11
Views: 109

Re: Scott Adams cart images

Then it occurred to me that perhaps the Scott Adams games expect the screen memory to be in the normal (unexpanded, +3K) place or they act weird? This. The games store internal data at $1000 and following, consequently screen output to a screen buffer located at $1000 (as it is with RAM in BLK 1) w...
by Mike
Tue Aug 15, 2017 5:31 am
Forum: Programming
Topic: Software sprites?
Replies: 155
Views: 47374

Re: Software sprites?

beamrider wrote:'c' [...] 'c' [...] 'c' [...] 'c'

Just curious: is there a specific reason you insist on this spelling of C (other than, possibly, that cc65 doesn't implement the full language)?
by Mike
Tue Aug 15, 2017 2:46 am
Forum: Games
Topic: In the making: Arukanoido – an Arkanoid clone
Replies: 256
Views: 10938

Re: In the making: Arukanoido – an Arkanoid clone

No point patching a program to work with a defective emulator. Please try out your Power20 with this simple BASIC program. It reads out the joystick with essentially the same method as shown in the WIKI , just it uses 37137 (=$9111) instead of the more easier to remember 37151 (both registers work o...
by Mike
Mon Aug 14, 2017 11:27 am
Forum: General Topics
Topic: Where's the latest file browser?
Replies: 2
Views: 89

Re: Where's the latest file browser?

I recovered V1.6 (which is the latest I know) with archive.org - anyhow, I've mirrored the *.zip file:

CBM-FileBrowser V1.6

Greetings,

Michael
by Mike
Wed May 24, 2017 4:11 am
Forum: Collecting and History
Topic: Request for a *good* scan of Home Computing Weekly #20 ...
Replies: 11
Views: 410

Re: Request for a *good* scan of Home Computing Weekly #20 ...

I disagree, I pointed out that it was possible to zoom in and read the text. You got it wrong by exporting. You argued against it in your first post with an export image then half corrected yourself but were ungracious in your next reply. Please and thank you works well to get someone to do you a f...
by Mike
Wed May 24, 2017 3:03 am
Forum: Collecting and History
Topic: Request for a *good* scan of Home Computing Weekly #20 ...
Replies: 11
Views: 410

Re: Request for a *good* scan of Home Computing Weekly #20 ...

Vic20-Ian, I'm asking for a reasonable favour, not especially on my behalf, but to get things going about somebody else's problem. That favour could be done in a 5 minutes work scanning and uploading the scan at some place. I'd reciprocate with type-in work, a functioning program and when I get the ...
by Mike
Tue May 23, 2017 7:17 am
Forum: Collecting and History
Topic: Request for a *good* scan of Home Computing Weekly #20 ...
Replies: 11
Views: 410

Re: Request for a *good* scan of Home Computing Weekly #20 ...

Those two pages are the same 'quality' I got from the view function in archive.org. The scan is 970x1392 pixels, which correspond to roughly 120 dpi - and from the looks it's most probably interpolated from 60 dpi. If someone wants to ruin his eyes on this, go ahead. Not me. And I am not going to co...
by Mike
Tue May 23, 2017 6:34 am
Forum: Collecting and History
Topic: Request for a *good* scan of Home Computing Weekly #20 ...
Replies: 11
Views: 410

Re: Request for a *good* scan of Home Computing Weekly #20 ...

As follow-up: the viewer in archive.org gives a slightly better result - somehow the export function wrecks the rest of readability:

not_quite_as_worse.png

Still not anything I'd want to stress my eyes with over a substantial amount of time. :|
by Mike
Tue May 23, 2017 6:21 am
Forum: Collecting and History
Topic: Request for a *good* scan of Home Computing Weekly #20 ...
Replies: 11
Views: 410

Re: Request for a *good* scan of Home Computing Weekly #20 ...

This is how a zoomed view of the mentioned *.pdf displays on two different computers I use:

pixel_junk.png

So - either you have access to a different *.pdf, or we don't share the same judgement about the readability of the listing. :(
by Mike
Tue May 23, 2017 1:14 am
Forum: Collecting and History
Topic: Request for a *good* scan of Home Computing Weekly #20 ...
Replies: 11
Views: 410

Request for a *good* scan of Home Computing Weekly #20 ...

In the sense of the sub-title of this section, "History and Preservation Issues": http://www.sleepingelephant.com/ipw-web/bulletin/bb/viewtopic.php?t=8506&start=18 ... in the quest of reconstructing the program "Mazes make the game... here's how to construct them". There's a ...
by Mike
Tue May 23, 2017 12:57 am
Forum: Emulation and Cross Development
Topic: Super Expander
Replies: 27
Views: 713

Re: Super Expander

Richard sent me a version of the program that had been typed in, however with the difficulty in reading the scan it had many errors and they were what I was trying to work out using CBM Prg Studio. Regardless whether the original typist used the scan, or had the paper copy available and "just&...
by Mike
Mon May 22, 2017 2:43 pm
Forum: Emulation and Cross Development
Topic: Super Expander
Replies: 27
Views: 713

Re: Super Expander

The text is really small and the scan is low resolution. Beyond hope, actually. It's impossible to type in the program from this scan. Might be sensible to post a request for a better scan in the "Collecting and History" section in the hope a Denial member has access to a paper copy of th...
by Mike
Mon May 22, 2017 6:01 am
Forum: Programming
Topic: Counting "trick"/memory copy
Replies: 2
Views: 174

Re: Counting "trick"/memory copy

Usually, copy routines on the 65xx with LDA/STA (),Y modify Y with INY/DEY instead of doing a costly INC/DEC on the low-byte ZP address base. That way, the fix-up of the high-byte only needs to be done on over-/underflow of Y, simultaneously for both src and dst pointers, and doesn't require indepen...

Go to advanced search