On Thu, Feb 14, 2013 at 03:27:39PM -0800, Chuck Guzis wrote:
Wait a second--the 1600 preceded the Eagle PC by about
a year.
Um, OK. I'm not familiar with the Eagle PC.
Lots
of companies came out with 16-bit 8086-based boxes before it was
apparent that compatibility with the IBM iron was a
necessity--remember that for the first year or two, there wasn't that
much in the way of IBM-specific hardware. Lotus pretty much changed
all of that.
Sure but the 1600 wasn't just some random 8086 machine, it used the ISA bus
and a similar BIOS and kept the usual things at the usual addresses, except
for the annoying changes.
According to my notes, the Eagle 1600 was probably a
better system
than the 5150.
Absolutely! Too bad that turned out not to matter. Having hardware to
split 16-bit bus cycles into two 8-bit ISA cycles would have been very nice,
but other than that it was a decent design, and quite a bit faster.
8086 CPU, optional hard drive, 96 tpi (800K) drives.
I'd forgotten about the assumption of 96 TPI drives, but come to think of it
I did have to dig up a pair of TM100-4s to make it work. Luckily they were
kind of black sheep at the time (not useful on most new computers), which made
them actually cheaper than TM100-2s.
Eagle might have survived if
the founder hadn't gone out celebrating the IPO.
That was a real shame...
How much compatibility was another question.
Initially, it was
assumed that being able to run MS-DOS and early software, such as
Multiplan was sufficient.
Yeah it seemed like DOS was going to be CP/M all over again, but the 5150's
market share reached critical mass so that it got hard to resist reaching out
and touching the hardware, since that worked so much better than using either
DOS or the BIOS. A month or two of a *good* programmer's time back then (to
put good drivers in front of the hardware) could have prevented all that...
But no.
John Wilson
D Bit