torvalds@cc.helsinki.fi (03/05/91)
I'm the happy owner of a SVGA-board called Enhanced-VGA (no manufacturer name anywhere) using the ET-4000 chip with 1MB video memory. I've got two questions I'd like to have answered, and this group seems to be my best bet: 1 - Any problems with a 11MHz IO-clock? I've a 33MHz 386 and am currently running the bus at 8.33 MHz, but 11 would be nice if I can be sure not to burn out anything (rams on the card are 100ns, any problem with them at 1024x768x256 and additional cycles for updating?). I have seen posts claiming (well one post) that et4000 can go 11MHz according to some manual - anything on this special board? 2 - The updated manual I've gotten has bios-programming information (set mode etc), but is there any way I could get a hardware-level programming guide (electronically and free :-). I've got FTP-access. Anybody? advTHANKSance torvalds@cc.helsinki.fi Linus Torvalds
bernd@actisb.UUCP (Bernd-Gunter Nitzler) (03/07/91)
In <1991Mar4.230809.5416@cc.helsinki.fi> torvalds@cc.helsinki.fi writes: >I'm the happy owner of a SVGA-board called Enhanced-VGA (no manufacturer >name anywhere) using the ET-4000 chip with 1MB video memory. I've got >two questions I'd like to have answered, and this group seems to be my >best bet: I have also a 'no name' SVGA with the ET-4000 and 1 MB and a special sync-Chip which translates the old MDA, CGA and EGA-Frequencies to VGA (70 Hz, 31/35 kHz) >1 - Any problems with a 11MHz IO-clock? I've a 33MHz 386 and am >currently running the bus at 8.33 MHz, but 11 would be nice if I can be >sure not to burn out anything (rams on the card are 100ns, any problem >with them at 1024x768x256 and additional cycles for updating?). I have >seen posts claiming (well one post) that et4000 can go 11MHz according >to some manual - anything on this special board? There should be no problem. I had run my card several weeks with 16.5 MHz IO-clock and had never a problem. I used both 100 ns and 80 ns Chips. Now I'am using 11 MHz because my new IDE-Drive does not boot securely with 16.5 MHz and there is no problem since 2 months. Hope this helps. Bernd. -- Bernd-Gunter Nitzler VoiceNet: 49 / (30) 8 84 44-224 ACTIS in Berlin GmbH UUCP from USA: pyramid\ Kurfuerstendamm 65 from elsewhere: mcvax!unido!tub!actisb!bernd D-1000 Berlin 15, Germany