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- <li><em>date</em>: Fri May 27 12:08:21 2005</li>
- <li><em>from</em>: mhw at wittsend.com (Michael H. Warfield)</li>
- <li><em>in-reply-to</em>: <<a href="msg00999.html">[email protected]</a>></li>
- <li><em>references</em>: <<a href="msg00999.html">[email protected]</a>></li>
- <li><em>subject</em>: [ale] Need Tractor Feed Dot Matrix printer</li>
> As I recall, TRS-80 was considered an 8-bit system, as it was based upon
> the Z-80 processor. The earliest systems shipped with only cassette tape
> drives, with floppy drives available later. The Z-80 used an 8-bit word,
> but used 16 bit addressing. The processor of the Apple II was truely
> 8-bit, but that opens up a whole new can of wormy discussion. 8-).
The TRS-80 Coco (Color Computer), which was a different beast entirely,
was a 6809 processor. That was a 16 bit processor (internal) with an 8
bit bus (external). Later, you were able to get OS-9 for it (the "9" in
OS-9 comes from the 680"9" for which it was designed though it was later
ported to the 68000+ family line and is still a popular embedded OS).
> Floppy drives of the era had a tremendous range of formats, styles,
> desities, etc. Hard sectored, soft sectored, 8 inch, 5.25 inch, what have
> you.
>
>
> Radio Shack also released a TRS style machine based upon the 69000 which
> ran a very early version of Xenix if I recall correctly.
Never ran into that. I did have two Coco's (one original silver and
one later while Coco-2) running OS-9 w/ multiple floppy drives plus
40Meg MMDF hard drives. Multiprocessing system w/ dial-in all in 128Meg
of RAM (with the original silver Coco, you had to solder the second bank
of 64Meg on top of the first back with a bank select pulled out to a I/O
pin).
> > Sean
> >
> >
>
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<li><strong><a name="01002" href="msg01002.html">[ale] Need Tractor Feed Dot Matrix printer</a></strong>
<ul><li><em>From:</em> tfreeman at intel.digichem.net (tfreeman at intel.digichem.net)</li></ul></li>
<li><strong><a name="01019" href="msg01019.html">[ale] Need Tractor Feed Dot Matrix printer</a></strong>
<ul><li><em>From:</em> mhw at wittsend.com (Michael H. Warfield)</li></ul></li>
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<li><strong><a name="00999" href="msg00999.html">[ale] Need Tractor Feed Dot Matrix printer</a></strong>
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