rli@buster.stafford.tx.us (Buster Irby) (03/21/91)
Does anyone have a 1280 x 1024 display running under ISC X11. I do not care what version, I just need to know if 1280 x 1024 has been done under ISC X11. If you have such a beast running, please send me email describing your hardware and software setup. I need this information for a client in Saudi Arabia, who does not have email access. Thank you, any help you can offer will be very much appreciated.
wht@n4hgf.Mt-Park.GA.US (Warren Tucker) (03/23/91)
In article <1991Mar21.033435.1888@buster.stafford.tx.us> rli@buster.stafford.tx.us writes: >Does anyone have a 1280 x 1024 display running under ISC X11. I I have a fair amount of experience with the Microfield offering, available for ISC and SCO (ESIX too?). It *ain't* cheap, but it's looks good on a 20" NEC 5d monitor. 1280x1024x256 is a sight to behold. Anything short of 12 Mb of RAM is going to make you sick though. Pixmaps of that size are big! ---------------------------------------------------------------------------- Warren Tucker, TuckerWare, Mountain Park, GA wht@n4hgf.Mt-Park.GA.US "The computer can't tell you the emotional story. It can give you the exact mathematical design, but what's missing is the eyebrows." -- Frank Zappa
jimr@umbc4.umbc.edu (jim rybacki) (03/23/91)
In article <379@n4hgf.Mt-Park.GA.US> wht@n4hgf.Mt-Park.GA.US (Warren Tucker) writes: >In article <1991Mar21.033435.1888@buster.stafford.tx.us> rli@buster.stafford.tx.us writes: >>Does anyone have a 1280 x 1024 display running under ISC X11. I > >I have a fair amount of experience with the Microfield offering, >available for ISC and SCO (ESIX too?). It *ain't* cheap, but >it's looks good on a 20" NEC 5d monitor. 1280x1024x256 is a >sight to behold. Anything short of 12 Mb of RAM is going to >make you sick though. Pixmaps of that size are big! > >---------------------------------------------------------------------------- >Warren Tucker, TuckerWare, Mountain Park, GA wht@n4hgf.Mt-Park.GA.US >"The computer can't tell you the emotional story. It can give you the exact >mathematical design, but what's missing is the eyebrows." -- Frank Zappa I agree that the Microfield looks good on a 5D, BUT it seems to have some problems on the 486 motherboards with scsi controllers (both adaptec 1542B and WD7000) running ISC2.2, I even tried the new board with the VGA daughter card-------- no luck. ---- echo "Just a guest@umbc"; echo "Disclaimer: These are my thoughts only!" jimr@umbc3.umbc.edu
martin@unislc.uucp (Martin Cryer) (03/30/91)
In article <5506@umbc3.UMBC.EDU> jimr@umbc3.umbc.edu.UUCP (jim rybacki) writes: >In article <379@n4hgf.Mt-Park.GA.US> wht@n4hgf.Mt-Park.GA.US (Warren Tucker) writes: >>In article <1991Mar21.033435.1888@buster.stafford.tx.us> rli@buster.stafford.tx.us writes: >>>Does anyone have a 1280 x 1024 display running under ISC X11. I >> >>I have a fair amount of experience with the Microfield offering, >>available for ISC and SCO (ESIX too?). It *ain't* cheap, but >>it's looks good on a 20" NEC 5d monitor. 1280x1024x256 is a >>sight to behold. Anything short of 12 Mb of RAM is going to >>make you sick though. Pixmaps of that size are big! >> >>---------------------------------------------------------------------------- >>Warren Tucker, TuckerWare, Mountain Park, GA wht@n4hgf.Mt-Park.GA.US >>"The computer can't tell you the emotional story. It can give you the exact >>mathematical design, but what's missing is the eyebrows." -- Frank Zappa > > I agree that the Microfield looks good on a 5D, BUT it seems to have some > problems on the 486 motherboards with scsi controllers (both adaptec 1542B > and WD7000) running ISC2.2, I even tried the new board with the VGA daughter > card-------- no luck. > >---- >echo "Just a guest@umbc"; echo "Disclaimer: These are my thoughts only!" > jimr@umbc3.umbc.edu You may have trouble if your 386/486 system has more than 16MB of memory... The problems (this depends upon the Unix you use and the motherboard type) may be due to the fact that the Adaptec 154X cards are bus master dma types and as such can only address 16MB of system memory from the AT bus. This does not matter if the target buffer is allocated from the bottom 16MB of memory, but if it isn't, or you are doing direct i/o to user space above 16MB then the DMA will go to the wrong place! Also, even if your Adaptec driver copes with this by copying above 16MB transfers first (using a below 16MB buffer), then the problem may also occur when the system DMA's to the Microfield (which does not do bus master DMA - well the T8's and V8's at any rate). In this case, some motherboards like the Intel i401 ISA etc, extend the DMA range from 16MB to a much bigger number by providing an i/o mapped port to write as the top 8 bits of the dma address. This is probably vendor dependent. The driver you have may not do this. Another problem is sometimes the Adaptec AT bus transfer speed, try setting it via the driver (or the board jumpers - but carfull the driver doesn't override the jumper values) to something less than 5.7MByte/s. I found 5.0MByte/s to be most reliable on our mix of motherboards... (see Adaptec command 0x09 - Set Transfer Speed manual entry....) The real but expensive solution to the Adaptec DMA problem is to go to EISA and use the Adaptec 1740 EISA controller in EISA mode. This really flies.... On a 33Mhz system with EISA SCSI, things really screem..... One problem we have with the Microfields, which you may not worry about, is trying to get them EMI approved as FCC class B devices - they are quite electrically noisy! I hope I'm not stating the obvious - enjoy the many colours.... Martin Cryer, Unisys Europe Africa Workstations O/S Development C/O Unisys Corp, D1Z01 322 N 2200 S Salt Lake City Utah, USA, 84116 801-594-5754 All opinions my own etc etc etc..........