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hardware Classic   hardware Classic : Prisma Megamix Music Card Available On AmigaKit.com
   posted by amigakit on 30-Oct-2016 21:45:20 (5487 reads)
AmigaKit.com is pleased to announce stock and availability of A-EON Technology's Prisma Megamix music card.

The Prisma is a new Zorro card expansion for big box Amiga's and also the Amiga 1200 Towers with an available compatible clockport socket (desktop A1200 version coming soon).

Based on VS1063 chip, it can playback many music formats in full 16-bit 48Khz audio and additionally mix with the Amiga's native Paula sound. When it is decoding and playing back a MPEGA audio file or various other formats, it frees up the Amiga to do other things. An MHI driver is supplied with the card for AmigaAmp and other various music playing software.

Specifications
* Clockport and Zorro II interfaces (if operated in Zorro II slot, clockport can be used for compatible add-on cards)
* Compatible with Amiga A1200 T, A2000, A3000, A4000, A4000T.
* Based on VS1063 chip
* Playback of wide range of formats: MP2, MP3, WMA, OGG, LC-AAC, HE-AAC, FLAC, ALAC, IMA ADPCM, G.711 u-law, G.711 a-law, G.722, and WAV PCM formats
* Pass through port for Paula mixing. Paula mixing is automatically activated by hardware, no software interaction needed
* CDDA header
* MHI support for use with MHI compatible software such as AmigaAmp
* can be expanded by optional digital module (S/PDIF)

Direct Product Link:

AmigaKit UK Product Page
AmigaKit USA Product Page
AmigaKit Europe Product Page
AmigaKit Canada Product Page

    

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· More about hardware Classic
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PosterThread
danwood 
Re: Prisma Megamix Music Card Available On AmigaKit.com
Posted on 5-Nov-2016 9:02:45
#21 ]
Super Member
Joined: 30-Sep-2008
Posts: 1057
From: Unknown

Anyone managed to get CD audio working? Had my card since Wednesday but cannot get CD audio to work no matter what I try :/

Presume this is the CDDA header? (documentation doesn't give a port layout)

http://i.imgur.com/8wFE5xG.jpg

Keen to get a review of this out today, but need to get it working first.

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QuikSanz 
Re: Prisma Megamix Music Card Available On AmigaKit.com
Posted on 5-Nov-2016 15:55:00
#22 ]
Super Member
Joined: 28-Mar-2003
Posts: 1066
From: Surf City - Huntington Beach, Ca.

That may be an output. Why I need the I/O setup to see how it hooks up to a sound card.

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Daedalus 
Re: Prisma Megamix Music Card Available On AmigaKit.com
Posted on 5-Nov-2016 16:30:16
#23 ]
Super Member
Joined: 14-Jul-2003
Posts: 1587
From: Glasgow - UK, Irish born

Quote:
Actually it wouldn't be that bad. Software can read/write CIA serial data per byte. So can still do 8-bits/byte at a time. The CIA then takes the data in the buffer and sends/receives it serially.

Hmmm, that's fine for the serial buffer, but for the MAS player the serial transmission is over one of the parallel pins, which are masked and written to directly; there is no buffer. Perhaps there's some way of linking the serial shift register to one of the parallel pins, but I've never seen it.

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Rob 
Re: Prisma Megamix Music Card Available On AmigaKit.com
Posted on 6-Nov-2016 0:08:16
#24 ]
Elite Member
Joined: 20-Mar-2003
Posts: 5564
From: S.Wales

@ Vision

Quote:
Can it play and send 5.1 sound? (through multiple channels, btw)


I assume that's what the optional SPDIF module is for.

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Hypex 
Re: Prisma Megamix Music Card Available On AmigaKit.com
Posted on 6-Nov-2016 9:07:19
#25 ]
Elite Member
Joined: 6-May-2007
Posts: 8628
From: Greensborough, Australia

Quote:
Hmmm, that's fine for the serial buffer, but for the MAS player the serial transmission is over one of the parallel pins


Ah, manual serial over parallel. Yes that is a cause for concern. I've seen that for hobby JTAG hacks connecting to a router. I don't know why a parallel port is abused for that purpose to slow the data stream down when a serial port is perfectly fine tuned to slow data transmission. And if the MAS is connecting to a parallel port why doesn't it just send a byte at a time? I don't understand these programmers.

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Daedalus 
Re: Prisma Megamix Music Card Available On AmigaKit.com
Posted on 6-Nov-2016 11:51:29
#26 ]
Super Member
Joined: 14-Jul-2003
Posts: 1587
From: Glasgow - UK, Irish born

It emulates an I2C bus since that's what the chip expects. I guess there must be some reason serial + level shifters wasn't feasible, maybe clock timings or something.

Edit: Just checked the schematic and it needs 5 output lines and 2 input lines, so I guess that's why.

Last edited by Daedalus on 06-Nov-2016 at 11:53 AM.

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Hypex 
Re: Prisma Megamix Music Card Available On AmigaKit.com
Posted on 6-Nov-2016 14:11:53
#27 ]
Elite Member
Joined: 6-May-2007
Posts: 8628
From: Greensborough, Australia

From what I read about I2C, which is funny as it's about as old as IEC, is that the parrallel port can be used for testing purposes for the hobbyist and is unreliable. But for a commercial application a proper interface should be used. So it seems unfortunate the MAS player using an unprofessional hack to interface with the Amiga and bit banging. It's recommended to use USB but surely an IC can be used to drive the I2C bus from parallel data.

In any case it loosk like the Megamix is a better tool for the job.

Last edited by Hypex on 06-Nov-2016 at 02:12 PM.

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spudisgood 
Re: Prisma Megamix Music Card Available On AmigaKit.com
Posted on 7-Nov-2016 13:08:45
#28 ]
Member
Joined: 20-Aug-2015
Posts: 97
From: Cheshire, England

Interesting :)

Might consider one for my desktop 1200 if the price is right.

Spud.

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Overflow 
Re: Prisma Megamix Music Card Available On AmigaKit.com
Posted on 14-Nov-2016 9:54:49
#29 ]
Super Member
Joined: 12-Jun-2012
Posts: 1385
From: Norway

Prisma Music card review by Dan Wood/Kookytech;

https://www.youtube.com/watch?v=gurN0TOmD7Q&

Last edited by Overflow on 14-Nov-2016 at 09:59 AM.

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Deniil715 
Re: Prisma Megamix Music Card Available On AmigaKit.com
Posted on 16-Nov-2016 14:14:55
#30 ]
Elite Member
Joined: 14-May-2003
Posts: 4131
From: Sweden

Quote:
So you can play compressed music without any noticable CPU load.

However streaming this music via clockport takes some CPU cycles, especially as the stream has to be sent byte at a time so it takes 4 times more CPU instructions than storing it in RAM. Unklie Paula, this card is not DMA driven (at least when connected to clockport).


I used to have a Prelude1200 card connected to the clockport and playing 44.1kHz (raw) music was no real problem, so streaming compressed music should really not be any problem. 5-10 times less traffic.

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