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- Path: cnn.exu.ericsson.se!news
- From: ebukkc@ebu.ericsson.se (Kenneth Chou 66611)
- Newsgroups: comp.sys.m68k
- Subject: Re: MC68360 DRAM problem
- Date: 15 Apr 1996 19:34:38 GMT
- Organization: Ericsson Inc.
- Message-ID: <4ku8cf$i5h@cnn.exu.ericsson.se>
- References: <317208E1.1B52@siemens.ch>
- Reply-To: ebukkc@ebu.ericsson.se
- NNTP-Posting-Host: aladdin.ebu.ericsson.se
-
- Three questions:
- 1) What is your system clock?
- If you wire-wrap your SIMM, you might suffer from the noise on the data bus.
- Try lower the system clock by programming PLLCR.
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- 2) What is the refresh cycle you get to the DRAM and what the DRAM needs?
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- 3) What is Arbitration ID for IDMA?
- Just make sure that no other bus master take the bus to prevent
- DRAM controller from refreshing DRAM
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- Hope these helpful
- Good Luck
-
- /Ken
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