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- Path: mercury.galstar.com!usenet
- From: wizard@galstar.com (David Templeton)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: GVP SII + A2620 conflicts?(was A2000 upgrades)
- Date: 28 Mar 1996 00:38:35 GMT
- Organization: Galaxy Star - Northeastern Oklahoma Internet
- Message-ID: <1811.6660T1116T273@galstar.com>
- References: <alexanderw.1178323845G@newssrv.dcrt.nih.gov>
- NNTP-Posting-Host: star091214.galstar.com
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP) *UNREGISTERED*
-
- >Thanks for all the suggestions for upgrades to my A2000.
-
- >Looks like I my budget can afford a C= A2620 board with 68881 and 4 MB and
- >the newest ROMs. I'll also be buying OS 3.1 (OS 4 should be out soon after
- >I buy this ;-), a cheap HD and a Supra 28.8 modem. Of course I'd rather get
- >the A2630 (as some suggested :-) but it's overkill for my budget ($350 USD).
-
- >My question is will there be any conflicts between the new A2620 board and
- >my GVP series II SCSI card with 4 MB. How will the total 8 MB configure
- >itself?
-
- I think the standard Memory config for the A2620 is in the lower memory
- addresses, if so your allright. If it maps it to high memory you will need to
- change the mask on your HD to 0x00FFFFFE to aviod DMA conflicts.
-
-
- >My Amy: I have an A2000 (rev 4.4) 1meg angus/OS 2.1/ GVP series II SCSI
- >card with 4 MB and a 100MB HD (90% full and I have deleted alot already). I
- >also have a ReNo CDROM which has been a great upgrade. This system has
- >been great for everything I've done so far but we all know its limitations.
- >I don't want to wait for a new low end machine in North America so I will be
- >upgrading.
-
- There was a field upgrade on the earlier motherboards dealing with the
- A2620. You had to add a pull up resistor.
-
- Here is what my notes say about it.
-
- A2000 74ALS245 BUS Transciever Resistor
-
-
- Amiga 20000 systems using some expansion hardware, such as A2090A, in
- conjuction with a copproccessor card (A2620) require a 3.3K ohm resistor to be
- soldered from pin 11 to pin 20 on the 74ALS245 bus transfer chip at U605.
- This resistor is to be considered part of the standard installation procedure
- for a A2620 card.
-
-
-
-
-
- Email: wizard@galstar.com
-
- WWW: http://www.galstar.com/~wizard
-
- Member <TEAM AMIGA>
-
-
- "It's kind of fun to do the impossible..." -Walt Disney
-
-