Commodore Amiga A500 Technical Reference Manual page 7

Section
1
Summary of Differences
This manual presents technical documentation for three different
Amiga models, comparing them to the original Amiga, referred to as
model A1 000. Technical information included in this manual is rel-
evant for the following Commodore Amiga models:
the Amiga 500
(A500),
a low-cost version of the origi-
nal Amiga computer, software-compatible with the
A1 000. Unlike the A1
000,
the
A500
has an integrated
keyboard, provision for internal memory expansion up
to 1 megabyte, new-style hardware connectors, and
Kickstart code in ROM.
Two versions of the Amiga 2000:
the A2000 is software-compatible with the A1
000
and
has internal slots, real time clocWcalendar and new-
style hardware connectors.
the B2000, the cost-reduced version of the Amiga
2000, features some different custom chips, but is
otherwise similar to the A2000.
The B2000 is still under development, and the information present-
ed in this document is subject to change. The information included on
the B2000 is intended to aid developers in designing software and
peripherals that are applicable for both the current and upcoming
version of the Amiga 2000.
Unless differences are specifically noted, information presented for
the A2000 also holds true for the B2000. The differences between
the two Amiga 2000 models are mainly hardware differences which
will affect peripheral design, but not the way the computers function
with software. Section 2 contains system block diagrams for all
three new Amiga models.
KICKSTART
IN
ROM
Both the Amiga 2000 and the Amiga 500 feature version 1.2 of
lckstart built into
ROM.
Kickstart 1.2 (currently version 33.180)
boots automatically when the Amiga is turned on.