sehrlich@lynx.northeastern.edu (01/15/91)
Hello, everyone. I am new to this journal, and don't know if this question has every been brought up (although, from the caliber of conversion that takes place here, I assume it has been asked before. I question is this: I have an Apple IIc. Now, I first got it (about 6 or so years ago). Since that time, I have heard that there were different versions of the IIc that Apple put on the market. And that each version did certain things just a bit differently that the other version. Could someone please 1) e-mail me directly to: sehrlich@lynx.northeastern.edu or 2) post publicly, how to find out which version I have (please don't get too technical in the answer, for although I am an engineering Tech. student, I am NOT a computer science student. And, in English, what the version means to me in terms of how the computer does something in this version that it might or might not do in another version. Does anyone know what I am talking about? Thanks much for any help anyone can offer me. Scott Ehrlich, Computer Engineering Technology student now at Wentworth Institute of Technology, Boston, MA.
ralpho@cs.fau.edu (Ralph P Carpenter) (01/16/91)
In article <memo.676087@lynx.northeastern.edu> sehrlich@lynx.northeastern.edu writes: >[...] >I have heard that there were different versions >of the IIc that Apple put on the market. And that each version >did certain things just a bit differently that the other version. >[...] You can inspect the value stored at memory address $FBBF (64,447 decimal) in order to find out which version of the Apple//c you have. From Applesoft Basic ("]" prompt), you can do: ] PRINT PEEK (64447) From the Monitor ("*") prompt, you can do: * FBBF The value you get back is the ROM version number. The basic and most meaningful differences are: FF 255 Original //c -- boat anchor 00 000 adds support for 3.5" Unidisk drives 03 003 adds expanded-RAM support 04 004 fixes bugs in expanded-RAM support 05 005 Apple //c+ Some (all?) of the original (ROM FF) machines have a defective crystal that prevented their modem port from operating correctly at speeds in excess of 300 bps... A few years back, we ordered five or so machines for some of our faculty to use at home -- all but one were ROM FF and had the defect :-( One was a ROM 03 -- guess who got (has) that one? :-) Fortunately, Apple dealers (are supposed to) replace the bad crystal free-of-charge. Hope this helps. -- | Ralph P Carpenter | InterNet: Ralpho@acc.fau.edu | Blake's 7: | | Sr Programmer/Analyst | Bitnet: Ralpho@FauVax | The | | Florida Atlantic Univ | Ci$: 74015,644 GEnie: Ralpho | Motion | | at Boca Raton | Vox: 407/367-2616 Fax: -2749 | Picture |