[sebhc] H89

Carroll Waddell carrollwaddell at sc.rr.com
Sun Aug 6 23:58:25 CDT 2006

Mark Garlanger wrote:

> Hopefully, you saw which components lost their magical smoke, so that
> you can replace them with new ones that still contain the smoke. ;-)
> I think the archives have some documentation on the H89, but here is
> some basic information.
> The simpliest mode is when the 'off-line' key is in the down position,
> upon power on, it should beep once and then function as an H19
> terminal.
> With the 'off-line' key in the up position, it's a functional
> computer. When powered on, you "should" hear 2 beeps (although there
> are reasons you could hear one and still be ok) and an "H:" prompt
> should appear. (There is a dip-switch on the cpu board to auto-boot,
> but since the manual actually recommends not to set it that way, there
> is only a small chance it would  auto-boot. )
> Once you get to the H: prompt, your options vary depending upon with
> ROM is installed. All of the ROMs have the 'B'oot option (once you
> press 'B' the oot will be displayed). Press return at this point to
> attempt to boot from the first drive on the primary controller.
> Let me know if you have any additional questions.
> Mark
> On 8/6/06, Carroll Waddell <carrollwaddell at sc.rr.com> wrote:
>> I just bought an H89 off ebay, and I don't have any documentation for
>> it. When you turn it on, what happens? Does it boot from disk, or
>> display something on the screen or what?
>> It did try to communicate with me when I first powered it up, but I
>> don't understand smoke signals.
>> Carroll
>> -- 
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Thanks Mark.
The C9 cap on the diskette drive motor control board is what lost its 
smoke. The 89 does work correctly off line like an H19, but the CPU part 
appears dead. It only beeps once when power is turned on.
When I gat a look at some docs, I'll see what the CPU board is doing.
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