Freport Supplemental Doumentation

FREEPORT S'JPPLEMENTAL DOCUMENTATION Decem~er, 1986 Introduction The documentation contained herein will cupplem~nl-Jf'1~i:l(f!~r: . . that you received earlier. All duplicate infonnation co~ iA ttus document should supercede all previous doeun,ents. The design of the Freeport is now stable. Changes bot.ween .PYT:2.· Lmits (thA units you received in early November) and producti0'1·UAiti: wiii tie minor and should not effect your product plans. You sh~u!d-ha'\jt~.r,\I reservations about committing to your designs from thi~ ·poin' ipil~ar d;: ~: ·_r;.:;·• .doc~Jmentation should accompany the final .pre-production. .pr~rtti.oG Freeport (Called a •pvr unit). ·· Changes between the various prototype levels (DVT1 , DY..Tf, -~nd PVT/Production) are all detailed in this document. Documentation Outline Th.· ·;e sections are replaced (from the early package):. ·oiffer~p~~f·;::: be1ween Freeport and Macintosh 512K, Macintosh Plus"·Cl.f1J.i;~t!1·:~l~i.;n updated and redistributed to different sections), •Expansion..·,P.n!t ~'mr.f.,~ic:;-t' diagram replaced (See amended and enhanced informatio.n. !:·f!IO~l); ~f~bl and ADB software specifications {specifications updated). This documentation packet includes the following sections: I. Rom Daugtherboards II. Changes between DVT1 and DVT2 prototypes Ill. Changes between DVT2 and PVT/Production units IV. New Expansion Features (of Freeport) - Description, Warranty Issues V. Custom Card Expansion - Features of the 96 piR: ~~·~:;:;t·~·: VI. Disk Drive Expansion - SCSI Hard Disks, SOOK Drives VII. Apple Desktop Bus - Input Device Bus VIII. Feature Changes From Previous Macintosh Syst~nts IX. General System Enhancements X. Power Budget Considerations XI. Heat Dissipation Guidelines,_, XII. Memory Map · XIII. System Timing Diagrams XIV. Mechanical Drawings "X>J. = dest SCSI Software Specification . XVI. :..cttest ADB Software Specification 12186 .i I. ROM daughterboarCls Enclosed with this docum~tiJiofl are a new set of.ROMS. Also included is a new System Tools disk. JlJ~.:RQtAs will work properly in your ~VT units only. The final Freeport systemw.iU, .lflip with 256K of ROM which will plug directly into the ROM sockets on th.l::Jogic board. Because EPROMs of this size are not readily available, we. hav~(Ovided you with a ROM daughterboard that holds four EPROMs. Tak•ft;t9Qether, the four EPROMs contain the ROM image of the final 256K FreeDOrt ROM. Since you may be developiflg;expansion card produds which might interfere with the ROM daughterboard, we have also provided you with a set of masked ROMs that are electrically and mechanically identical to the final ROM. However, these ROMs have many known bugs. They are provided for your convenience only~·· 12186 Apple Computer Confidential Page 2 II. Changes between first (DVT1) and second (DVT2) prototypes • Serial Ports are now Macintosh Plus compatible (This change was previously detailed in section 8 of the •Freeport Hardware Preliminary Notes"). • 96 Pin expa…