At 11:04 AM -0800 3/19/03, Dave Lee wrote: >This Plus was built in March, 1987. I also have one that was built >in 1989 (4mb of >RAM installed). Any ideas if the 1989 one has internal improvements >that the 1987 >one may not have?
I think this information is on LEM somewhere but I don't remember where I got it so it's just easier to paste it than tell you where to look for it. Sorry, no exact dates. >Macintosh Plus ROM history > >Readers Digest condensed version of Macintosh Plus ROM history, or >the truth according to Bo3bdar the everpresent: > >1st version (Lonely Hearts, checksum 4D 1E EE E1): Bug in the SCSI >driver; won't boot if external drive is turned off. We only produced >about one and a half months worth of these. > > 2nd version (Lonely Heifers, checksum 4D 1E EA E1): Fixed boot bug. >This version is the vast majority of beige Macintosh Pluses. > > 3rd version (Loud Harmonicas, checksum 4D 1F 81 72): Fixed bug for >drives that return Unit Attention on power up or reset. Basically >took the SCSI bus Reset command out of the boot sequence loop, so it >will only reset once during boot sequence. This version shipped with >the platinum Macintosh Pluses. > > And Bo3bdar saith: "Thou shalt not rev them damn ROMs no more!" > > Later that same day... > > Bo3bdar Saith Also: > > Lonely Heifer was about a 2 byte change, > > Loud Harmonica was about 30 byte change. > > No other bug fixes in SCSI or elsewhere. > > Modified object code directly. > > Not possible to get a specific ROM since they are all the same part number. > > Shouldn't rely on a specific ROM, there will be no upgrade. > > Bo3b Bo3b a boola, a wiff Ba2m Bo1om. -- Hardy Menagh, Hardsdisk Ltd., a branch of the Abandoned Computer Shelter. Sponsored by jmug.org. <http://www.mac-group.org/jmug/acs.html> "He that will not apply new remedies must expect new evils; for time is the greatest innovator." -Francis Bacon- E-mailed with Eudora from a beige G3 Macintosh -- Compact Macs is sponsored by <http://lowendmac.com/>. Support Low End Mac <http://lowendmac.com/lists/support.html> Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> The FAQ: <http://macfaq.org/> --> 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/compact.macs%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
