Welcome, Guest. Please login or register.

Author Topic: CyberVisionPPC and Radeon at the same time?  (Read 1207 times)

Description:

0 Members and 1 Guest are viewing this topic.

Offline AncalimonTopic starter

  • Hero Member
  • *****
  • Join Date: Apr 2002
  • Posts: 516
  • Country: 00
    • Show only replies by Ancalimon
    • http://www.myspace.com/orhunmusic
CyberVisionPPC and Radeon at the same time?
« on: July 28, 2020, 01:48:27 PM »
Is it possible to have both connected to an A4000T? I want to get a Mediator and a Radeon.
A4000T, 604e@400&060@66, 128MB+16MB+Zorram256, CVisionPPC, VLabMotion, Toccata, XSurf100&RapidRoad, Prisma Megamix

A1200, Blizzard060@50, 256MB, Blizzard IV SCSI, FastATA mk4
 

Offline darksun9210

Re: CyberVisionPPC and Radeon at the same time?
« Reply #1 on: August 03, 2020, 05:58:39 PM »
yes,  they will both be separately addressable and available to the system at the same time.

my first and main concern would be the RTG software you chose to run. does Picasso96 have a Permedia2 driver? or does CGX4 have a mediator/Radeon driver?


either way, i suspect after running the cybervisionPPC, you'll be disappointed with the basic graphics performance of the radeon/mediator combo.

the only advantages the radeon has are:-
1. up to 64meg of usable graphics ram - anything above that gets added to the fastram pool - but it's anything but "fast" - and the 64meg Graphics ram limit wipes out any point in having a 256meg card except for a "who has the bigger numbers" competition.
2. able to handle screen "bitmaps" larger than 2000x2000 pixels - the P2's bitmap handling and ramdac speed became an issue trying to run large screens with a decent bit depth.
3. digital output.

downsides of the Radeon.
1. No warp3D driver/support. and looking at the forums - getting an idea of what shenanigans have gone on, and promises have been made/broken, i can guess that this will never happen.
2. performance. i pulled my mediator and radeon out and plugged in an CyberVision64/3D using the A4k's original zorro3 busboard. all numbers on P96 speed were up with the cybervision, and general "user experience" was much better.
3. have to faff around with another thing (mediator) to get a thing working.

but then, all of the above is purely my experience - your mileage may vary etc etc.
« Last Edit: August 03, 2020, 06:12:12 PM by darksun9210 »

A500 Vampire2/minimegachip/lazarus/indyECS
A600 Vampire2/604n/subway/IndyECS
A1200 PiStorm32+Pi4/subway/IndyAGA
A1200 PiStorm32+Pi4/subway/IndyAGA
A1200 PiStorm32+Pi4/subway/IndyAGA
A3k C=040/CV64-3D/Xsurf100+RRoadUSB/Zoram256/acard scsi-ide-CF/IndyECS,
A4k CSMk3-060/CV64-3D/Xsurf100+RRoadUSB/Bigram256/IndyAGA, mediator+pci cards
CD32 TF360/IndyAGA
Plus an SGI O2 & consoles.
 

Offline AncalimonTopic starter

  • Hero Member
  • *****
  • Join Date: Apr 2002
  • Posts: 516
  • Country: 00
    • Show only replies by Ancalimon
    • http://www.myspace.com/orhunmusic
Re: CyberVisionPPC and Radeon at the same time?
« Reply #2 on: August 06, 2020, 12:05:53 AM »
I thought Radeon on Amiga was faster at everything except lowres 3d accelerated games.
A4000T, 604e@400&060@66, 128MB+16MB+Zorram256, CVisionPPC, VLabMotion, Toccata, XSurf100&RapidRoad, Prisma Megamix

A1200, Blizzard060@50, 256MB, Blizzard IV SCSI, FastATA mk4
 

Offline LiveForIt

Re: CyberVisionPPC and Radeon at the same time?
« Reply #3 on: August 06, 2020, 12:09:43 PM »
First of all Zorro3 card are limited to 13.5 MByte/s, due to buster chip, so anything connected to zorro iii, slot will be limited to that speed.

https://en.wikipedia.org/wiki/Amiga_Zorro_III

Zorro2 is connected directly to the CPU, and on board bus, you can’t really clock up system bus, because it’s connected to all kind of custom chips that do not support high clock frequencies.

So the best way avoid this problem is to connect the graphic card directly to the accelerator, this way the accelerator, provide high speed bus access to the graphic card, while not messing up onboard timing.

« Last Edit: August 06, 2020, 12:25:34 PM by LiveForIt »
 

Offline darksun9210

Re: CyberVisionPPC and Radeon at the same time?
« Reply #4 on: August 10, 2020, 08:07:34 PM »
Yup, in a nutshell.

it's why i'd love someone to reverse engineer the CPLD chips on a Cvision or G-Rex and do another production run. i seem to recall some benchmark program getting 50MB/s on the ol' cyberstorm3/blizzardPPC bus. so best case scenario, for the mediator, is it's only 3 to 4 times slower than the G-Rex, or B/Cvision cards. and that's before the obvious hardware differences between the permedia chip made in the 90's, and radeon chip made in the 00's.

i could put some legit numbers up there to test this but the thought of faffing about with putting a PPC/bvision machine together again and what boingbag version works with what version of cybercraphix.... eeesh. no thanks.

having 64Meg graphics ram tho, and just not having to worry about how many screens with high bit depths/resolutions... and also not stressing about cooling... almost worth it...

--edit-- some numbers i did for another forum. same OS software, same graphics software
A3k = A3000, Cyberstorm3/060, Cvision64/3D.    A500 = A500&Vampire2.    A4k = A4000, A3640, Mediator, Radeon9250 - not the best CPU i admit, so will revisit when either a TF4060 or Warp4060 becomes a thing.

Code: [Select]
      operation           A3k          A500         *A4k*
     
      RectFill            2889         4261         6722
      RectFillPattern     2842         6158         5875
      WritePixel        147969       301582        57870
      WriteChunkyPixels    741         6158          403
      WritePixelArray      730         6072          386
      WritePixelLine     30072        36449        11630
      DrawElipse          9874        24698         4920
      DrawCircle         10743        25527         5975
      Draw               14644         6768         1328
      DrawHor/Ver        24624        16067         9811
      ScrollRasterX        162          313         1259
      ScrollRasterY        160          389         1330
      Text               10351        12596         2849
      BltBitMap           8660         8530         6229
      BltBitMapRastPort   7058         7135         3368
      BitMapScaling         75          548           66
     
      Openwindow           103          172           20
      MoveWindow           392*        1135*          43
      SizeWindow           117*         261*          11
      ConOutput            371          652          104
      ScreenToFront         61           61           60
« Last Edit: August 10, 2020, 08:49:08 PM by darksun9210 »

A500 Vampire2/minimegachip/lazarus/indyECS
A600 Vampire2/604n/subway/IndyECS
A1200 PiStorm32+Pi4/subway/IndyAGA
A1200 PiStorm32+Pi4/subway/IndyAGA
A1200 PiStorm32+Pi4/subway/IndyAGA
A3k C=040/CV64-3D/Xsurf100+RRoadUSB/Zoram256/acard scsi-ide-CF/IndyECS,
A4k CSMk3-060/CV64-3D/Xsurf100+RRoadUSB/Bigram256/IndyAGA, mediator+pci cards
CD32 TF360/IndyAGA
Plus an SGI O2 & consoles.