> is there a Lisa 1 and a Lisa 2? I thought there was just a Lisa...
> please educate me!
The original Lisa, also known as the Lisa 1, was introduced in early
1983 and had two internal 5.25-inch "Twiggy" floppy drives with about
880K capacity each. The optional hard drive was an external Profile,
which originally had 5 MB capacity but was later offered in a 10 MB
version.
In early 1984, Apple introduced the Lisa 2, which came in three models:
* Lisa 2 - single internal 3.5-inch Sony floppy drive, 400K capacity.
* Lisa 2/5 - same as Lisa 2, but with a 5 MB external Profile hard drive
* Lisa 2/10 - Lisa 2 with an internal 10 MB "Widget" 10 MB hard drive
note - this has a different I/O card and backplane than the earlier
models (1, 2, 2/5)
When the Lisa 2 was introduced, Apple offered a free upgrade from the
Lisa 1, so very few Lisa 1 machines still exist. This was apparently
due to problems with reliability of the Twiggy drives. There was a
shareholder lawsuit alleging that Apple withheld information on the
Twiggy problem from the shareholders.
In 1985, Apple introduced the Macintosh XL - a Lisa 2/10 with a "screen
mod kit" and MacWorks (Mac OS for Lisa).
The screen mod kit changed the display resolution such that the pixels
are square, as expected by Macintosh software. MacWorks did not require
the screen mod kit, but without it circles appear as ellipses, etc.
The screen mod kit was available as an upgrade. This consisted of
a transformer to be installed in the monitor, a new video state PROM
for the I/O board, and new boot firmware for the CPU board. With
a screen mod kit installed, a Lisa can no longer run the native Lisa
software. However, a third party offered a kit allowing the screen
mod to be switched.
Received on Sun Nov 09 2003 - 01:33:37 GMT
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: Fri Oct 10 2014 - 23:36:18 BST