brod@jessica.Stanford.EDU (Brodie Lockard) (06/04/91)
What do the Rev B ROMs in a Mac II do that the Rev A ROMs did not? Didn't this upgrade have something to do with 32-bit addressing? What's the difference between a Rev B ROM upgrade and the upgrade everyone wants Apple to provide to allow 128MB of RAM? Brodie Lockard brod@jessica.stanford.edu Brodie Lockard brod@jessica.stanford.edu
tgoose@eng.umd.edu (Jason Garms) (06/05/91)
In article <1991Jun3.211128.13792@leland.Stanford.EDU>, brod@jessica.Stanford.EDU (Brodie Lockard) writes: > What do the Rev B ROMs in a Mac II do that the Rev A ROMs did not? > Didn't this upgrade have something to do with 32-bit addressing? > What's the difference between a Rev B ROM upgrade and the upgrade > everyone wants Apple to provide to allow 128MB of RAM? > > Brodie Lockard > brod@jessica.stanford.edu > > Brodie Lockard brod@jessica.stanford.edu The major feature that I know of is it allowed you to address more NU BUS cards with more than 1 MB of RAM. Rev A ROMs wouldn't work with these cards. For the record. This was a free upgrade from Apple if you could show proof of purchase of a product that needed the new ROMs. Have a good day, Jason Garms tgoose@eng.umd.edu
DON.NOLL@p3425.f421.n109.z1.FidoNet.Org (DON NOLL) (06/05/91)
BL> What do the Rev B ROMs in a Mac II do that the Rev A ROMs did not? BL> Didn't this upgrade have something to do with 32-bit addressing? BL> What's the difference between a Rev B ROM upgrade and the upgrade BL> everyone wants Apple to provide to allow 128MB of RAM? BL> BL> Brodie Lockard BL> brod@jessica.stanford.edu BL> BL> Brodie Lockard brod@jessica.stanford.edu On of the things the REV B roms do is allow a NUBUS card to access more than 1 meg of ram each. This helps you if you have a video board with gobs of memory or a NUBUS memory card for AUX. * Origin: Don's Point, Get it? (1:109/421.3425)
sgrae@megatest.UUCP (Steve Graesser) (06/05/91)
From article <1991Jun3.211128.13792@leland.Stanford.EDU>, by brod@jessica.Stanford.EDU (Brodie Lockard): > What do the Rev B ROMs in a Mac II do that the Rev A ROMs did not? > Didn't this upgrade have something to do with 32-bit addressing? > What's the difference between a Rev B ROM upgrade and the upgrade > everyone wants Apple to provide to allow 128MB of RAM? > The first Mac II ROMs had problems recognizing add-in memory boards. This from the July 1991 issue of MacWorld pg. 178 Steve -- Steve Graesser {decwrl | amdcad}!megatest.uucp!sgrae Megatest Corp. 880 Fox Lane San Jose, CA 95131 | (408) 441-3077
dittman@skitzo.csc.ti.com (Eric Dittman) (06/06/91)
In article <1991Jun4.191352.8623@eng.umd.edu>, tgoose@eng.umd.edu (Jason Garms) writes: > For the record. This was a free upgrade from Apple if you could show proof > of purchase of a product that needed the new ROMs. I got the upgrade without having to show proof of purchase. This was about 18 months ago. -- Eric Dittman Texas Instruments - Component Test Facility dittman@skitzo.csc.ti.com dittman@skbat.csc.ti.com Disclaimer: I don't speak for Texas Instruments or the Component Test Facility. I don't even speak for myself.
russotto@eng.umd.edu (Matthew T. Russotto) (06/06/91)
In article <676180918.0@blkcat.FidoNet> DON.NOLL@p3425.f421.n109.z1.FidoNet.Org (DON NOLL) writes: > >On of the things the REV B roms do is allow a NUBUS card to access more than 1 meg of ram each. This helps you if you have a video board with gobs of memory or a NUBUS memory card for AUX. > * Origin: Don's Point, Get it? (1:109/421.3425) Doesn't matter for A/UX, if I remember correctly-- the manager is completely rewritten within A/UX itself. -- Matthew T. Russotto russotto@eng.umd.edu russotto@wam.umd.edu .sig under construction, like the rest of this campus.
mccabe@dopey.cs.unc.edu (ren) (06/07/91)
In article <1991Jun4.191352.8623@eng.umd.edu> tgoose@eng.umd.edu (Jason Garms) writes: >The major feature that I know of is it allowed you to address more NU BUS >cards with more than 1 MB of RAM. Rev A ROMs wouldn't work with these cards. >Jason Garms >tgoose@eng.umd.edu Do these ROMs also fix the boot problems when using 4 MB SIMMs (the special SIMMs for the Mac II with the PALs that fix test mode)???? If so, they could come in handy for Sys 7.0 (;-). Thanx in advance, danm
russotto@eng.umd.edu (Matthew T. Russotto) (06/07/91)
In article <4241@borg.cs.unc.edu> mccabe@dopey.cs.unc.edu (ren) writes: >In article <1991Jun4.191352.8623@eng.umd.edu> tgoose@eng.umd.edu (Jason Garms) writes: >>The major feature that I know of is it allowed you to address more NU BUS >>cards with more than 1 MB of RAM. Rev A ROMs wouldn't work with these cards. >>Jason Garms >>tgoose@eng.umd.edu > >Do these ROMs also fix the boot problems when using 4 MB SIMMs (the special >SIMMs for the Mac II with the PALs that fix test mode)???? If so, they could >come in handy for Sys 7.0 (;-). No, for that you need the IIx (FDHD) Roms. -- Matthew T. Russotto russotto@eng.umd.edu russotto@wam.umd.edu .sig under construction, like the rest of this campus.