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Forum: New Releases
Last Post: silverdr
2021-07-21, 05:38 PM
» Replies: 6
» Views: 353
DL1 and DL2 - documentati...
Forum: Programming
Last Post: silverdr
2021-06-05, 05:13 PM
» Replies: 1
» Views: 292
Integrated Lumafix Pro
Forum: General
Last Post: silverdr
2021-05-14, 04:57 PM
» Replies: 3
» Views: 591
Kernal64 1.7.0 b15
Forum: Emulation
Last Post: silverdr
2021-04-20, 08:58 AM
» Replies: 2
» Views: 578
VIC-2 FPGA Replacement - ...
Forum: General
Last Post: laubzega
2021-02-18, 07:01 AM
» Replies: 2
» Views: 1,235
C128 Compatible?
Forum: General
Last Post: laubzega
2021-01-08, 09:51 PM
» Replies: 1
» Views: 1,331
Expected rendering?
Forum: General
Last Post: silverdr
2020-11-03, 12:01 PM
» Replies: 1
» Views: 1,646
Kernal64 emulator with Be...
Forum: Emulation
Last Post: silverdr
2020-10-21, 05:20 PM
» Replies: 3
» Views: 1,754
New BeamRacer batch arriv...
Forum: News & Announcements
Last Post: silverdr
2020-10-20, 03:07 PM
» Replies: 0
» Views: 1,439
Installation on a C64C (b...
Forum: General
Last Post: shazz
2020-10-14, 09:26 PM
» Replies: 4
» Views: 2,650

  DL1 and DL2 - documentation not clear on a few things
Posted by: silverdr - 2021-06-05, 12:17 PM - Forum: Programming - Replies (1)

ytm Wrote:I have a few questions - the documentation is not clear/explicit on those:

1. If I start the second displaylist (VREG_DL2STROBE) what happens at the end of the frame? Do we get back to the beginning of DL1 or the beginning of DL2? If DL2 - how do I get back to DL1?

I admit this might not be completely clear so I'll update the docs shortly.

OTOH it is quite easy to verify with a few lines of VBASIC:

100 VCFG 0,0,1
110 VWAIT 130,0
120 VMOV $20,0:VMOV$21,0
130 VDELAYV 10
140 VMOV$20,14:VMOV$21,6
150 VMOV$41,0:VMOV$42,1:REM DL2 $0100
200 VCFG 0,$100,1
210 VWAIT 150,0
220 VMOV $20,0:VMOV$21,0
230 VDELAYV 10
240 VMOV$20,14:VMOV$21,6
999 VEND
1000 DLON
1999 END
If we'd be returning to DL2, then we would have only one black bar stable on the screen. Since there are two - this means we get back to DL1 ;-) Every raster (frame) we first execute the part located at $0000 and then the part located at $0100. This allows adding extra blocks of VASYL code and "jumping" around them without a need to cache/save/restore the initial address. If we look at it this way, then the DL2 is a kind of JMP equivalent (in addition to existing BRA) rather than a separate DL entity. There is a small caveat, which we have to be aware of, if we jump across memory banks. I'll cover it answering the next question.

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Posted by: ytm - 2021-05-25, 08:21 PM - Forum: New Releases - Replies (6)


Encouraged by silverdr I started development of BeamRacer-compatible GEOS.

You can find it here on GitHub: https://github.com/ytmytm/geos/tree/beamracer-ramexp (make sure to checkout breamracer-ramexp branch).

Right now there is support for the same basic additional features that already existed in this reverse engineered GEOS back in 2000 for expansions like +60K and RamCart 64/128

  • whole DeskTop will be cached in RAM, so you only need to keep it on the boot disk
  • swap file for memory overwritten by running Desk Accessories (Calculator, Notepad, etc.) is stored in extra RAM rather than on the disk
This occupies most of the first 64K, so there are 7 banks left.

I plan to use 6x64K banks for disk cache / RAM disk.

The last bank would be reserved for the most ambitious project - redirecting all graphical functions of GEOS to BeamRacer, basically overlaying whole screen with Bitmap Sequencer data. This would allow to use step/repeat/copy features for fast access. VDC (80 column) support on C128 proves that this is possible to do and GEOS isolates applications from accessing bitmaps directly.

You can find whole roadmap here: https://github.com/ytmytm/geos/projects/1

There are no releases yet, but I have setup automated build already. If you go into Actions, then click on the latest CI workflow run, then in the Artifacts section you will find the PRG file that you can load and run. A disk with DeskTop must be in the drive 8.

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  Integrated Lumafix Pro
Posted by: sebos - 2021-05-13, 02:34 PM - Forum: General - Replies (3)


I am thinking about this specification. When connected to the BemRacer, there is absolutely no improvement in image quality.
The image is identical to that of the VIC-II itself.

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  Kernal64 1.7.0 b15
Posted by: silverdr - 2021-03-15, 11:35 PM - Forum: Emulation - Replies (2)

@abbruzze - noticed a small problem with the version mentioned in the subject. When using VBASIC and issuing the recommended "reset to a known state" sequence `RACER 0:RACER 2` - it looks like the displaylist gets enabled. That is not correct and leads to various problems especially when the already existing displaylist works with PORT registers... Please ensure that the above mentioned sequence completely re-sets the emulated BeamRacer, which includes disabling displaylist processing.

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  VIC-2 FPGA Replacement - Randy Rossi
Posted by: Balartacus - 2021-02-09, 04:48 AM - Forum: General - Replies (2)


A guy named Randy Rossi is working on a VIC-2 FPGA replacement. It would be very cool to see this new VIC-2 development be compatible with the BeamRacer.

Here is his YT channel: https://www.youtube.com/channel/UCx2-Yj0...8y09ywPjMw

Latest Video: https://www.youtube.com/watch?v=LY0Hu4egKYc&t=1245s

Hope you are doing well, and thank you again for all of your hard work on the BeamRacer!

Cheers!  Big Grin

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  C128 Compatible?
Posted by: CountZero - 2021-01-08, 04:00 PM - Forum: General - Replies (1)

Will this work in a C128?

More specifically, in C64 mode on a C128?  Although it would be pretty cool to also have it available in C128 40 column mode.

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  Expected rendering?
Posted by: shazz - 2020-11-01, 11:09 PM - Forum: General - Replies (1)

[quote pid='110' dateline='1604272188']

After testing the examples using Kernal64, I noticed a big difference when running the sequencer example.
Of course, Kernal64 doesn't try to mimic my old monitor (Sony PVM-14N5U monitor, PAL/NTSC) but I found the vertical lines quite weird (check the M and H, and the BASIC lines), like some kind of interlaced display.
I never noticed that with "normal" C64 graphics. I check a few demos, nothing like that. Do I imagine things ?

[Image: seq.jpg]

Monitor specs: https://www.broadcaststore.com/pdf/model.../17906.pdf

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  New BeamRacer batch arrived!
Posted by: silverdr - 2020-10-20, 03:07 PM - Forum: News & Announcements - No Replies

Next batch of BeamRacer boards was cleared through customs and arrived today. We still need to thoroughly test every single board but we expect to start notifying everyone who reserved his unit really soon now  Big Grin

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  Kernal64 emulator with BeamRacer / 3
Posted by: abbruzze - 2020-10-12, 10:12 AM - Forum: Emulation - Replies (3)

Update, new demos.

[Image: reflections.gif]

[Image: hirestext.gif]

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  Installation on a C64C (but not only)
Posted by: shazz - 2020-10-11, 01:47 PM - Forum: General - Replies (4)

Hi guys,
So as I received the Beamracer (nice packaging!), I wanted to install it on my PAL C64C.

I followed the instructions (for the narrow boards, mine is a 250469 rev A), I was able to bend the C36 capacitor (enough I guess, else I'll re-solder it).
But I'm totally unable to set the beamracer in the socket, each time it pops up like it was on springs.

To test I also tried on the riser socket, the socket fits perfectly well on the VIC socket but same result, the BeamRacer pops up even when "well" inserted (meaning as much as it can).

I guess this is due to the pin shapes.

Any advice? I'd like to avoid breaking anything.


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