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Documentation about the Vampire hardware

Vampire 500V2 - IDE With Cdrompage  1 2 

Tim D

Posts 84
17 Apr 2020 08:27


Oops, hahaha, thread of course...

Thanks for the reassuring answer!


Carles Bernat Martorell

Posts 21
18 Apr 2020 23:32


I have an V500 with a compact flash reader, dvd drive and ssd drive with ide -> sata adapter via elbox 4xeide. It's working fine with fast ide disabled, with speeds of 3,5mb/s. When I enable fast ide the sysinfo speed test freezes the computer, i guess something is wrong here. Anyways 3,5mb/s is plenty for any amiga stuff i can think of; the most demanding thing I do is playing videos with riva, and it takes about 2.2mb/s


Gunnar von Boehn
(Apollo Team Member)
Posts 6207
19 Apr 2020 08:45


Carles Bernat Martorell  wrote:

Anyways 3,5mb/s is plenty for any amiga stuff i can think of; the most demanding thing I do is playing videos with riva, and it takes about 2.2mb/s

You are fully right that 3.5 MB/sec is for AMIGA which has normally small files really fast.
But its clear that e.g. 14 MB/sec will be a lot faster.
Having faster IO will make workbench and all feel more snappy.
It will also make video play back smoother and for running big games like DIABLO it will make starting these games also a lot faster.

But this is a choice every one can do for himself.



Carles Bernat Martorell

Posts 21
22 Apr 2020 05:43


Gunnar von Boehn wrote:

...It will also make video play back smoother...
 

Do you mean that, the faster the IDE, the less work for the CPU, given the same amount of data?


Mo Retro

Posts 241
22 Apr 2020 11:27


Carles Bernat Martorell  wrote:

Gunnar von Boehn wrote:

 
  ...It will also make video play back smoother...
 
 

 
  Do you mean that, the faster the IDE, the less work for the CPU, given the same amount of data?

No what Gunnar means is that data from a faster IDE is presented faster to the CPU.
In other words the IDE controller is a bottleneck for the superfast 68080.



Vojin Vidanovic
(Needs Verification)
Posts 1916/ 1
22 Apr 2020 12:55


Carles Bernat Martorell  wrote:

Gunnar von Boehn wrote:

 
  ...It will also make video play back smoother...
 
 

 
  Do you mean that, the faster the IDE, the less work for the CPU, given the same amount of data?

No, that is SCSI :)

With IDE you get just faster transfer. But Gunnar is right. The higher resolution of video is, it just does not demand more CPU power, but faster IDE transfer to load and play it smoother. So 3.5 mb to 14mb-s can make a great difference.

Huh, seems all my discs and backups go to LHAs and ISOs and will have to live in "memory card and USB era". Apple and modern PeeCees seems to be right. Lasers are now obsolete. Even I would not eliminate Blue Ray recorder out of picture due to media size and even speed compared to past gen, but that is too expensive and wildly unsupported in Amiga land. And requires fast SATA.



Gunnar von Boehn
(Apollo Team Member)
Posts 6207
22 Apr 2020 13:03


Mo Retro wrote:

No what Gunnar means is that data from a faster IDE is presented faster to the CPU.

Yes this is correct.
IDE does eat CPU time.

Lets make some example:
To play a video back you need 3 things:
a) load the VIDEO
b) unpack the VIDEO
c) convert to VIDEO to GFX format

c) is FREE on SAGA as SAGA does this in HW

So you need only a) LOAD b) unpack

Lets say loading the VIDEO takes 10% CPU time.
This means you have 90% CPU time left for unpack it.

Lets say your IDE Speed is doubled...
This means defacto also that the CPU needed for loading is halved.
So be doubling the IDE speed you have more free CPU for unpack the video.

Using normal IDE speed to FASTIDE Speed will give you 5-10% more CPU for uncompressing the Video. This is like 2-3 FPS more.


Tim D

Posts 84
01 May 2020 20:20


OK, now I realised that most likely the slimdrive I want to attach to the vampire cannot be set to slave. I have an identical issue on my A4000. There I use an IDE splitter/4xIDE adapter and put the CDROM on the 2nd IDE cable. Would such a thing also work on the vampire (of course here a 44pin version)? And if so, would I need a buffered or unbuffered one?

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