On Wed, 31 Dec 2008, Roger wrote:
> Date: Wed, 31 Dec 2008 18:13:34 +0000 (UTC)
> From: Roger <[email protected]>
> Reply-To: "Enhanced Machine Controller (EMC)"
> <[email protected]>
> To: [email protected]
> Subject: [Emc-users] Mesa 7i43/7i33/5i20 questions
>
> I'm thinking about buying a dead VMC and converting it to EMC using Mesa
> boards and existing analog AMP's and encoders and had some questions:
> 1. Is there any advantage or disadvantage to selecting either the 5i20 or
> 7i43 boards? The 5i20's PCI interface is probably more robust but
> people seem to be successful with the 7i43. Is there any difference in
> function?
The 5I20 has 50% more I/O and will have less CPU overhead as it can be
accessed faster over the PCI bus than the 7I43 with its EPP parallel port
connection.The 5I20 is twice as expensive however. One advantage of the 7I43
is its mountable outside of the CPU case which may simplify wiring.
PCI is more robust than EPP but the 7I43 seems pretty good at getting along
with most parallel port on mother boards and add-in cards, see below
> 2. Is the 7i33 quadrature board compatible with the 7i43? It doesn't mention
> it in the Mesa documentation.
Yes, all of our daughtercards work with all of our 50 pin connector FPGA cards
> 3. If you need more I/O than a single Mesa board can
> handle can EMC support multiple 5i20's or 7i43's (assuming enough parallel
> ports) or a mix of the two?
Yes
>
> Roger
>
>
Here are my 7I43 EPP test results so far:
7I43 EPP tests:
Motherboard Parallel port Southbridge or SuperIO:
VIA VT82C686A Long test >3x10^10 EPP ops error free
VIA VT82C686B Long test >3x10^10 EPP ops error free
WINBOND W83977EF Long test >3x10^10 EPP ops error free
VIA VT8235 Long test >3x10^10 EPP ops error free
VIA VT1211 Long test >3x10^10 EPP ops error free
SMSC4977 Long test >3x10^10 EPP ops error free
ITE8643 Long test >3x10^10 EPP ops error free
PCI ADD-IN
OXSEMI PCI952 Long test >3x10^10 EPP ops error free
MOSCHIP 9805 Does not implement EPP correctly, no hope
This seems to be true of all 98XX cards
SUNIX 1888 long test >3X10^10 EPP ops error free
will not work with 12' cable ok with 5' suggest <2 feet
LAVA MOKO S1 long test >3x10^10 EPP ops error free (fastest card!)
ITE 8875 Trying to figure out how to enable
(comes up with all ports disabled)
PCIE ADD-IN
MOSCHIP 9901 Waiting for card
Testing done with:
12 foot IDC flat cable, December 2008 firmware, Rev C 7I43 hardware
except Sunix card (wont config or loopback test with 12 foot cable)
Rev C hardware is:
1. Rev B 7I43 with 4 SMT capacitors soldered on back near
parallel header
2. Rev C 7I43
Note: I do not suggest using a 12 foot cable, but wanted a worst case cable for
testing. I suggest the Sunix cards be used with a short cable (2 foot or so)
as they have limited control signal drive
------------------------------------------------------------------------------
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users
