Hi IanD,
I think you chronology is slightly off.
The Apple (Motorola 6502) and TRS-80 (Zilog Z80) were introduced in 1976.
In 1977, Commodore introduced the Pet (Motorola 6502).
In early 1978 Zilog introduced the Z80a. This was a major innovation
because in allowed for direct inp/out.
Then in late 1979 (possibly early 1980), Commodore introduced the Vic-20
which was a very dressed down Pet and considerably cheaper.
Between 1980 and 1982 Atari, Texas Instruments, Acorn, Sinclair and a
number of other companies were developing home PC. That was also the year
that Commodore introduced the Commodore 64 (Motorola 6510) with 'sprite'
graphics.
During this time, their were also PC cropping up in offices . . . the one
that comes to mind for me is the Morrow MicroDecision which was running
CP/M there were of course other like Compaq and Kaypro.
We now think of the PC as Intel (or AMD), but there were real PCs in the
home and office way before the IBM (and PC clones). The variety and
choices were staggering and the prices for the home ones so cheap that it
was a very crazy time. The last Commodore I bought (a Plus4), I actually
got a a Toys-r-Us and if I remember right it was only $249.
And just as an aside, if IBM had not gotten greedy and decided to
over-charge on the MCA (micro-channel architecture) bus, things in the
computer industry might have gone in a very different direction. The 'gang
of nine' came together because of that . . . they are in a lot of ways
responsible for the level of standardization that we have become use to in
the desktop PC arena.
Sincerely,
C.Joseph Drayton, Ph.D. AS&T
CSD Computer Services
Web site:
http://csdcs.site90.net/
E-mail: (e-mail address removed)90.net