PeterH wrote: > > On Jan 21, 2009, at 10:49 AM, Kris Tilford wrote: > >>> The RAM is easy to find as it is standard PC RAM from back in the 386 >>> and 486 days, when every PC supported parity, but the parity could be >>> turned off in many PCs. >> No. The HP parity RAM was different in the LJ4/4M. Normal PC parity >> RAM (9 chip RAM) could be used, but it required modification by >> soldering. > > The PS card in my 4M is: > > C2080-60001 Rev. B > > The four ROM chips are: > > 1818-5437 > 1818-5438 > 1818-5439 > 1818-5440 > > Copyright: > > © 1992 HP-Boise > > © 1984-1992 Adobe > > © 1981 Linotype AG > > No RAM on the PS card itself. Of course, the printer has RAM. 2 MB, I > think. > > > Added RAM cards: > > Three standard 4 MB with parity cards NEC MC-421000A36BH-80. Eight > 424400 chips (data) and four 421000 chips (parity). All 80 ns. > > I believe the RAM cards were "pulls" from surplus MYLEX DAC960PL RAID > cards.
My memory is a bit foggy, but I believe the old HP 4M (M = Macintosh compatible) has a real Adobe Postscript ROM on the added LocalTalk card. We used ours in a network with Macs running System 7, PC's running NT and WFW 3.1, and Sun Solaris. The Suns used Postscript too, and they absolutely loved the Laserwriters and worked really well with the 4M. Stephen --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed Low End Mac's G3-5 List, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com To unsubscribe from this group, send email to g3-5-list-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
