Search found 514 matches

by ljbk
Wed May 09, 2018 6:50 am
Forum: STOS
Topic: Hardwarescrolling Control3.5a extension
Replies: 49
Views: 6476

Re: Hardwarescrolling Control3.5a extension

Hello !

Sorry but i have no time for Atari ST stuff.
I have not touched any ST code for about 5 years.

Paulo.
by ljbk
Mon Apr 04, 2016 7:52 am
Forum: News & Announcements
Topic: Hextracker (updated to 0.849B + BPM preview)
Replies: 318
Views: 76918

Re: Hextracker (updated to 0.849B + BPM preview)

Hello ! MIDI support is not part of the plans. Sorry about that. The best that can happen any time soon is for me to solve a nasty bug in version 0.850 that would allow to deliver a fully working "trash play" option. That feature allows to speed up the replay by a variable amount depending...
by ljbk
Mon Mar 24, 2014 5:56 pm
Forum: 680x0
Topic: Lance 12.5 / 25 / 50 KHz routine for STE (V13)
Replies: 71
Views: 17128

Re: Lance 12.5 / 25 / 50 KHz routine for STE (V13)

Look, instead of trying to debug your "experiences" it would be much faster for me to do a version where the mod is already "incbined". But unfortunately, at the moment i have no free time to do it. Sorry about that. So either someone else does it or you will have do it yourself ...
by ljbk
Mon Mar 24, 2014 12:59 pm
Forum: 680x0
Topic: Lance 12.5 / 25 / 50 KHz routine for STE (V13)
Replies: 71
Views: 17128

Re: Lance 12.5 / 25 / 50 KHz routine for STE (V13)

Hi ! As for 'z_octave3_cheat' and other parameters, please read the thread from begin and or the "read_me.txt" included in the Hacking Lance package. It is a cheat mode to achieve more speed with a cost: a reduced quality for octave 3 replay. The program can follow many code paths dependin...
by ljbk
Mon Mar 24, 2014 11:27 am
Forum: 680x0
Topic: Lance 12.5 / 25 / 50 KHz routine for STE (V13)
Replies: 71
Views: 17128

Re: Lance 12.5 / 25 / 50 KHz routine for STE (V13)

Hi ! The Hacking Lance program includes obviously everything to save and restore the context and writes some info on the screen. That is why it deals with video, interrupts, keyboard ... Otherwise while testing it from TOS you would get some bombs when returning to TOS ... As it is open source, i th...
by ljbk
Wed Mar 05, 2014 2:49 pm
Forum: Coding
Topic: Spectrum512 & wakestate
Replies: 4
Views: 1786

Re: Spectrum512 & wakestate

Hi ! This problem is due to a group of Video Shifter wake up states (not GLUE). Until now, there is no way for the SW to detect this situation without the help of the user. You can read about this here: http://www.atari-forum.com/viewtopic.php?f=16&t=24855&start=300 topic: Tue Sep 03, 2013 4...
by ljbk
Tue Feb 04, 2014 9:43 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

Hi Troed !

Nice to see you are still working on this.
Nothing new here as i spent no time at all on ST for the last couple of months.

Good luck !

Paulo.
by ljbk
Sat Oct 26, 2013 8:36 am
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

Hi ! My hint on this is that: - with hi-lo stabilizer 413 pixels will be displayed correctly (-52 + 361(pixel equivalent time of 71 Hz update)); - with ULM stabilizer, as the change to medium resolution is done 4 cycles earlier, only 409 pixels will be displayed correctly; I think you must substrac...
by ljbk
Fri Oct 25, 2013 7:27 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

Hi ! My hint on this is that: - with hi-lo stabilizer 413 pixels will be displayed correctly (-52 + 361(pixel equivalent time of 71 Hz update)); - with ULM stabilizer, as the change to medium resolution is done 4 cycles earlier, only 409 pixels will be displayed correctly; I can confirm for sure tha...
by ljbk
Fri Oct 04, 2013 8:29 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

Hi ! Just to add my 2 cents to the STE case, i would like to point out the following. In the 2006 thread, refered previously, as i don't have an STE, i asked to the forum if someone could test a few test programs in order to have the 1+3 lines syncscroll to work on STE as well. Based on the response...
by ljbk
Thu Oct 03, 2013 4:28 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

Hello ! I just want to clarify one thing: the "noline1" and "noline2" i refer in my Excell sheet do not correspond to "clean" 0 byte lines. In fact, it seems that the normal "rest" of the screen is moved down by one line and the number of bytes read by the MMU...
by ljbk
Fri Sep 13, 2013 2:43 pm
Forum: Demos - General
Topic: Best ST for Scene demos
Replies: 28
Views: 12484

Re: Best ST for Scene demos

Btw, is it border removed/not removed or bitplane flickering? I had issues with the jitter triggering +2 lines but used wakeup detection and suitable EXG-replacement to "make sure" +2 couldn't happen. "It works here" ... It is top border removed / not removed mainly. It's intere...
by ljbk
Fri Sep 13, 2013 1:46 pm
Forum: Demos - General
Topic: Best ST for Scene demos
Replies: 28
Views: 12484

Re: Best ST for Scene demos

Hi ! So unless there is a friday 13th effect, i would say that your menu has some serious top border flickering effects on my real STF especially when the options 1 and 2 appear going up and down ... Remember that this machine might be the slowest of all (8.0071 MHz) but i would say that the music h...
by ljbk
Thu Sep 12, 2013 5:48 pm
Forum: Demos - General
Topic: Best ST for Scene demos
Replies: 28
Views: 12484

Re: Best ST for Scene demos

Hi !

This is just to mention that even with STEs, there are different CPU clock speeds especially between NTSC and PAL versions.
I don't know about Mega STEs.
I have not tested the demo on my real STF yet but i will do it when i have some time.

Paulo.
by ljbk
Sat Sep 07, 2013 4:50 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

@Troed Nice ! You are now one of the few to have released a screen with a 1+3 lines hardscroll. My first released one was the YM50Kx set of disks, in March 2005, but in fact there were only 8 different positions to allow a normal screen vertical scroll. Regarding slower CPUs, you can estimate the CP...
by ljbk
Sat Sep 07, 2013 4:50 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

double click => double post :)
by ljbk
Tue Sep 03, 2013 3:30 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

Hi ! Here is more evidence about Spectrum 512 funny dots. The atatched updated BEEMOVE2 test includes now 199*20 = 3980 spots where Spectrum 512 funny dots can appear: 20 times 199 lines. The pixels involved in this case are always the first of every group of 16. The 4 bitmap words point to logical ...
by ljbk
Mon Sep 02, 2013 1:17 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

Hello ! So finally i got a WS2/DL3 "cold", with the fullscreen display unstability i reported in a previous post, today both with a without a disquette in the drive. BEESCR4N behave very well with both unstabilizers. So no warming problems for me anymore. I changed the default unstabilizer...
by ljbk
Sun Sep 01, 2013 8:46 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

It looks like at least some kind of OR or merge happens between the previous color and the "bitmap" data. All these cases with previous color $0333 and next color $0777. A thought: are you on RGB or composite? The colours you mention all seem a bit close to the sorts of effects you can ge...
by ljbk
Sun Sep 01, 2013 8:45 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

... Here's a thought. Dots are never seen on writes to colour 0 (which demos go wild on all the time). Does that imply that the 'corruption' is on the pixel data channel, rather than the palette channel? In that case (plasma like), the following "bitmap" word, after the 4 bitplanes relate...
by ljbk
Sun Sep 01, 2013 7:55 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

The logic, if there is any, seems really complex to understand. But here are some cases for the "bitmap" word: $1234 -> very light blue $4321 -> very ligh yellow $1432 -> very light rose $0140 -> normal light green $0040 -> almost full grey with some pixels flashing light green It looks li...
by ljbk
Sun Sep 01, 2013 5:47 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

That might be extraordinarily timing dependent though, maybe too much so to not be affected by warmup. If you test the program i atatched above, you will see a vertcal line of 199 dots with that color. The general behaviour of showing that color or not is not warming dependent. It will not change u...
by ljbk
Sun Sep 01, 2013 4:34 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

The trouble is the RESET circuit only resets the CPU and GLUE. There is no RESET line going to the MMU or the SHIFTER. That's right but there is still the power "on" reset for those. So probably when pressing the warm reset button while powering on, i am forcing some kind of stability. Ok...
by ljbk
Sun Sep 01, 2013 8:02 am
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

Hi ! This is just to confirm that after more than 10 hours of power on the WS3B1 state i got yesterday maintains the same behaviour: works as WS1 "banded" and displays "funny" Spectrum 512 dots. No change with warming then. After that i had a WS4 "banded" with "spe...
by ljbk
Sat Aug 31, 2013 8:37 pm
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 569
Views: 115382

Re: horizontal scrolling on ST

Hi ! So here is the "NO stabilizer" version of this 4 bit hard scroll feature. This should be the most reliable case, up to now, against any warming problems. As with the U versions, the unstabilization done at the last control line will be undone on the next frame at line 0 (sync line). ...

Go to advanced search