In a message dated 2/20/03 6:09:47 AM, [EMAIL PROTECTED] writes: << 820-0728-A Looks like a DOS card >>
There were three version of the Pentium/166 PC Compatibility card. The 820-0729-A was the second. I believe the 820-0729-B was the third. That leaves 820-0728-A as the first version of the card. The first version had capacitors soldered to the back of the board, at the D-Subminiature connectors, to take care of some video glitching problems, as one spotting feature. The VRAM was upgradeable on the first and second versions, but these were supplied half populated, with the upgrade being performed by pressing in J-lead VRAM chips into sockets at two locations. The VRAM was maximally populated on the third version by being soldered, not socketed. The on-board RAM was half populated on the first and second versions, and it was not possibly to upgrade, except through the 168-pin slot. The on-board RAM was fully populated on the third version (i.e., twice the capacity of a first or second version card, with these additional chips being soldered on the back side of the card). Expansion through the 168-pin slot was, of course, still possible. -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
