Urquhart Lisa 1.75 Firmware Project Plan Preliminary

Apple ComptLter Inc. To: W. Rosing, Inter-Office HernorCl'ldLJn J Couch, K.' Okin,. J. Davis, M. Ca.telain, w. Henry, R. Johnston, P. Baker, B. Fox, B. Daniels, Birss, M. Deppe, R. Page, A. Benjamin, But.ter;field, R. Mey.ers, B. Atkinson, R. Hochsprung, G. Ma.rt en:, D. Pol lo.ck, B. Smith, D. Cla.inos L. Tessler, E. s. cc: R. C~stro~ A. Herz£i•ld, 0. Densmore, D. 0££en, Phillips, G. ·cossey,- R. Battat, D. era.ft, ·9. Mi 11 er,. ,J. Shea., T. $vea. t G. Date: 07 June.l983 From: Mic haef'?(fi~uha.rt Subj: Lisa. 1.75 Firmva.~e Project Plan: Preliminary "' Attached in the preliminary project plan for the Lisa i.75 Ravt. I refer to the Rgvt ln the plan as trie system Firmware Moau1e or SFM. me plan 1s tentative and can only be completed with your cooperation and approval. The size of thE? · RCJVt ana the role tnat tne usa 1.75 CPUMdeo ooara must play In Llsa 1. 75 ana the various servers requires a well planned ~roach. Please review the plan as soon as you can. I am arranging a meeting at tne tlme ana pla0!.1na1cateo oe1ow so that open issues can be quickly resolved. Note that the most important issue ls knowing Who wlll oe ctolng wnat! To help you ln your review of the plan I am providing the following tidbits: Meeting place: Meeting time: Meeting aate:: S1tt1ng Bull 1:30-4:00 Monaay 13 June 1983 Usa 1.75 versat111ty i..1sa i.1s·s CPUMaeo ooara contains tne processor, 128-256K oytes of Ravt ana 128K.;_256K bytes of t=~AM. it is to oe designea to operate as a sing1e ooara or as part of a two board set me sec.ona ooard ·contains more Rf\M ana the MMU. In the single board configuration, Lisa 1.75 is effectively a Macintosh with two to four times tne firmware space. Even ln tne two ooara setup, no map moae (1.e. setup bit set) is effectively Macintosh made. From a marketing perspect1ve1 the~st be a reason for more firmware ln Lisa 1.75 versus Macintosn's 64K oytes Knowing tnat Mac provtaes a stanaara aesKtop capabil1ty using Quickdraw and the rest. Providing Lisa 1.75 with double or quaaruple tne amount of firmware space· means tnat eltner L the- equlv8lent functionality must be present ln Llsa 1. 75 flrmware, or 2. there must oe otner aspects at;>out the Usa 1.75 flrmware tnat demonstrates its worthiness as· part of a tiiger cost product For example, extensive diagnostics. Mac has virtually zero diagnostics in RCJ'-1. . . From a manufacturing e>r service perspective, there should only be one type of CPUNldeo board between 1.75 ~d servers. This reduces problems ana costs associated, with keeping track of differ:enc~ R()'Y1s, different ooards, installing ~rong RCMs, wrong. boards, lnventortes~: different repair proceaures.. etc. Increasing available memory Destgnlng a firmware.· module which thinks only 128K of RAl'1 is always available and which provides most of the basic ingrediants for qesKtop operation means• that additona! memory Gan be used more effectively. (_():)viously., things in RCJv1 should alway,s be thing~…