- Oct 9, 1999
- 72,636
- 47
- 91
No wonder I had problems with mine
From Broken Pixel. VIA and Epox have owned up to the problem
<< "ISSUE
Audio cards that use A3D audio chip causes KX133 system to deadlock when
system traffic is heavy.
SOLUTION
A3D chip issues one memory read request cycle to North Bridge and expects a
grant within 4 mico-sec of latency time. If PCI TRDY# is not asserted after
4 mico-sec, the A3D hardware will de-assert the FRAME# and REQ# to terminate
the operation. However, the A3D audio software driver cannot acknowledge the
termination and continues waiting for hardware response. Hence causes the
system to deadlock.
This issue will only occur during heavy system traffic when the North Bridge
cannot grant access to A3D audio chip within the 4 micro-sec latency time.
Source: VIA Application note Serial #AN137 Date 07/05/00.
ADDITIONAL NOTES
Since the above issue has no work-around on the VIA Apollo KX133 chipset
EPoX suggests against using sound cards based with the A3D audio hardware
with our EP-7KXA." >>
<< "ISSUE
Audio cards that use A3D audio chip causes KX133 system to deadlock when
system traffic is heavy.
SOLUTION
A3D chip issues one memory read request cycle to North Bridge and expects a
grant within 4 mico-sec of latency time. If PCI TRDY# is not asserted after
4 mico-sec, the A3D hardware will de-assert the FRAME# and REQ# to terminate
the operation. However, the A3D audio software driver cannot acknowledge the
termination and continues waiting for hardware response. Hence causes the
system to deadlock.
This issue will only occur during heavy system traffic when the North Bridge
cannot grant access to A3D audio chip within the 4 micro-sec latency time.
Source: VIA Application note Serial #AN137 Date 07/05/00.
ADDITIONAL NOTES
Since the above issue has no work-around on the VIA Apollo KX133 chipset
EPoX suggests against using sound cards based with the A3D audio hardware
with our EP-7KXA." >>
