| BIGMAC_Data_Sheet_6-85.pdf | | Rich Page
6/10/85
BIG MAC DATA SHEET
The Big Mac is a high performance Macintosh whic.h can be
used as both a Macintosh and as a work station. It is implemented using
three 500 gate bipolar ~Jate arrays and one 1200 gate cmos gate array.
Display: 1024 x 800 8IW display, 60 Hz refresh, 70Mhz dot rate
CPU: 68020 with option for 12M, 16M, and IBM clock rate
FPU: 68881 as floating point !coprocessor
NIJIU: Custom M~I1U with 4Gb ,address space, 64 entry TLB with
4Kb pages which offers a working set size of 256Kb.
Virtual address space is configurable from 16M to 4Gb.
The MMU~ supports write and execute protection and
,c--
dirty bits for ea-ch-page. - ~"~----./ UV'iJ;,-u_~ ~
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