Overview Features Instructions Performance Forum Downloads Products Reseller Contact

Welcome to the Apollo Forum

This forum is for people interested in the APOLLO CPU.
Please read the forum usage manual.
VISIT APOLLO IRC CHANNEL



All TopicsNewsPerformanceGamesApolloVampireReleases
Documentation about the Vampire hardware

Vampire V1200page  1 2 3 4 5 6 7 

Samuel Crow
(Apollo Team Member)
Posts 242
15 Dec 2016 10:25


Richard Gatineau wrote:
I'm surprised as the expansion connector have Audio LEFT (pin 147) and Audio RIGHT (pin148) inputs to be mixed with Paula, like shown on the A1200 schematic.

Those are inputs, not outputs.  Also, the plans for audio on the FPGA were for digital audio, not analog.


Richard Gatineau

Posts 15
15 Dec 2016 11:21


Samuel Crow wrote:
Those are inputs, not outputs.  Also, the plans for audio on the FPGA were for digital audio, not analog.
It is what I said... They are inputs. :)
  So, I expect the A1200 expansion was able to send its audio through those pins to be mixed.
(using a DAC to convert the digital to analog for the internal mixing)

And sure, you can allow to use an HDMI out for a full digital experience.
But think that some Amiga 1200 users will enjoy to use the original analog audio connectors.


Mr-Z EdgeOfPanic

Posts 133
15 Dec 2016 12:02


Well then play Audio direct trough paula, in 14 bit mode it still sounds quite good even for today's standards.


Richard Gatineau

Posts 15
15 Dec 2016 13:09


Mr-Z EdgeOfPanic wrote:
Well then play Audio direct trough paula, in 14 bit mode it still sounds quite good even for today's standards.
The idea was more to be friendly with the A1200 and avoid all those useless extra connectors and external audio mixer to be able to ear the Paula and Apollo core sound from the same speakers. :)
 
But sure, I can understand that dealing with analog is not really easy and add a cost to the board.


Nixus Minimax

Posts 181
15 Dec 2016 17:08


Richard Gatineau wrote:
It is what I said... They are inputs. :)
  So, I expect the A1200 expansion was able to send its audio through those pins to be mixed.

This seems very plausible to me. Remember the strange official CD-extension for the a1200 that connected to the expansion port and turned the a1200 into a CD32? The audio inputs were probably available for analog CD audio.



Samuel Crow
(Apollo Team Member)
Posts 242
15 Dec 2016 18:14


The genlock input on the A1200 belly slot would do the same thing for analog video if we had a DAC chip for that matter, but we won't because it would drop the scan rate to AGA levels.


Samuel Crow
(Apollo Team Member)
Posts 242
15 Dec 2016 18:20


If we could use the genlock input of the A1200 belly slot, we still wouldn't because of the scan rates.


Daniel Sevo

Posts 164
16 Dec 2016 09:00


8.5 years ago..
EXTERNAL LINK


Ian Parsons

Posts 103
16 Dec 2016 13:55


I wonder if any final decisions were made in the intervening period and if so was the hardware description code written already.


Richard Gatineau

Posts 15
19 Dec 2016 21:14


Nixus Minimax wrote:
This seems very plausible to me. Remember the strange official CD-extension for the a1200 that connected to the expansion port and turned the a1200 into a CD32? The audio inputs were probably available for analog CD audio.
Sure, because there is no doubt by looking the A1200 schematic. It was made for this usage, like done internally on CDTV.



Nixus Minimax

Posts 181
21 Dec 2016 18:00


Richard Gatineau wrote:
Sure, because there is no doubt by looking the A1200 schematic. It was made for this usage, like done internally on CDTV.

I find it very interesting because it shows that the ultra-awkward official CD-extension for the A1200 was already at least in concept stage when the A1200 was designed. I guess they should rather have added some input socket close to the PCMCIA-port which was the more likely candidate for CD-add-ons. Around that time all CD-drives in PCs had some internal analog wiring to connect to the soundcard. Thus, connecting an external CD-rom directly to the Amiga analogue amplifier circuit through the case would have made sense.



Roman S.

Posts 98
03 Jan 2017 07:47


I have another question - will the V1200 have a built-in IDE port, like V500+?


Gunnar von Boehn
(Apollo Team Member)
Posts 2848
03 Jan 2017 08:15


Roman S. wrote:

I have another question - will the V1200 have a built-in IDE port, like V500+?

Yes


Daniel Sevo

Posts 164
03 Jan 2017 20:42


Gunnar von Boehn wrote:

Roman S. wrote:

  I have another question - will the V1200 have a built-in IDE port, like V500+?
 

 
  Yes

Is it for better performance only or is there some other reason?
How much increase over built in IDE on A1200 are we talking about?



Gunnar von Boehn
(Apollo Team Member)
Posts 2848
03 Jan 2017 21:07


Daniel Sevo wrote:

  How much increase over built in IDE on A1200 are we talking about?

How many MB/sec do you get with your build in?

We get about 12 MB/sec.
So roughly 4 times faster than the original.
Depending on the test.


O. Radfoo

Posts 10
03 Jan 2017 22:52


Sorry, bit off topic, but is there a recommended method of setting up IDE on the V500+? I only get a bit over 3MB/sec according to sysinfo.


Daniel Sevo

Posts 164
04 Jan 2017 08:23


Gunnar von Boehn wrote:

Daniel Sevo wrote:

  How much increase over built in IDE on A1200 are we talking about?
 

 
  How many MB/sec do you get with your build in?
 
  We get about 12 MB/sec.
  So roughly 4 times faster than the original.
  Depending on the test.

Seems about right then. I get 2.8MB/s according to Sysinfo on a A600 with Vampire (Silver 6).
(My A1200 with Apollo 1260 (OCd) and buffered IDE is currently disassembled and not in a bootable condition so I cant make comparison)



Mr-Z EdgeOfPanic

Posts 133
04 Jan 2017 09:40


Daniel Sevo wrote:

Gunnar von Boehn wrote:

 
Daniel Sevo wrote:

    How much increase over built in IDE on A1200 are we talking about?
 

 
  How many MB/sec do you get with your build in?
 
  We get about 12 MB/sec.
  So roughly 4 times faster than the original.
  Depending on the test.
 

 
  Seems about right then. I get 2.8MB/s according to Sysinfo on a A600 with Vampire (Silver 6).
  (My A1200 with Apollo 1260 (OCd) and buffered IDE is currently disassembled and not in a bootable condition so I cant make comparison)
 

Don't forget on the A600 you are using the onboard IDE controller that has a max of about 3 MB/sec.
Vampire500 has it's own onboard IDE controller that should do a lot faster.



Daniel Sevo

Posts 164
04 Jan 2017 09:57


Mr-Z EdgeOfPanic wrote:

 
  Don't forget on the A600 you are using the onboard IDE controller that has a max of about 3 MB/sec.
  Vampire500 has it's own onboard IDE controller that should do a lot faster.
 

Im not forgetting, the comparision between built in vs a new IDE on Vampire was the whole point of this conversation. ;-)




Michal Warzecha

Posts 181
04 Jan 2017 10:02


12MB/s is ok I think
Yesterday I have copy whole my disk to bigger one, both SATA drives. Speed was 50-70MB/s. So, 12MB/s on much older technology is ok.

posts 136page  1 2 3 4 5 6 7