Welcome, Guest. Please
login
or
register
.
Forums
Forums
Board
Topic
Home
Today's Posts
Gallery
Login
Register
Amiga.org
»
Amiga computer related discussion
»
Amiga community support ideas
»
Micronik Z2i(6860) rev.5.42 and Impact A2000-HC+8 Series II GURU ROM
« previous
next »
Print
Pages: [
1
]
Go Down
Author
Topic: Micronik Z2i(6860) rev.5.42 and Impact A2000-HC+8 Series II GURU ROM (Read 1188 times)
Description:
0 Members and 1 Guest are viewing this topic.
aquapuls
Newbie
Join Date: Jan 2012
Posts: 19
Micronik Z2i(6860) rev.5.42 and Impact A2000-HC+8 Series II GURU ROM
«
on:
April 28, 2013, 04:34:44 PM »
Configuration:
A1200
Blizzard PPC
Micronik Z2i(6860) rev.5.42
Impact A2000-HC+8 Series II GURU ROM 6.13
SCSI HDD on board Impact
Speed SCSI HDD, installed on the Impact only 1,200,000 BYTES / SEC
Why such a low rate?
Any ideas?
Logged
Zetr0
Newbie
Join Date: Apr 2013
Posts: 49
Re: Micronik Z2i(6860) rev.5.42 and Impact A2000-HC+8 Series II GURU ROM
«
Reply #1 on:
April 28, 2013, 07:27:03 PM »
@aquapuls
Sadly the HC8 range of cards struggle with an 060 at the best of times.
The Micronnic Busboard (Z2i) provides a Z2 backplane for the A1200 - the theoretical throughput of this 16bit bus is aproximately 3.56MB per second, however there will be buffering and bus-controlling over heads going on and this will reduce that speed.
However I suspect that your low speed is due to the HC8 no longer able to DMA for the CPU (since it only has 16bit memory) - instead having to buffer from a 16bit FIFO to 32bit RAM - the latter of which the CPU has to do. I suspect there is a little play in the numbers for sure (1.2MB per sec is low) but I doubt its possible to get it much past 1.6MB a second with your current set up I am sorry to say.
Logged
aquapuls
Newbie
Join Date: Jan 2012
Posts: 19
Re: Micronik Z2i(6860) rev.5.42 and Impact A2000-HC+8 Series II GURU ROM
«
Reply #2 on:
April 28, 2013, 09:07:55 PM »
@Zetr0
Thanks for the reply.
Logged
Print
Pages: [
1
]
Go Up
« previous
next »
Amiga.org
»
Amiga computer related discussion
»
Amiga community support ideas
»
Micronik Z2i(6860) rev.5.42 and Impact A2000-HC+8 Series II GURU ROM
There was an error while thanking
Thanking...