[sebhc] HDOS sysgen questions (and problems)

Barry Watzman Watzman at neo.rr.com
Wed Jan 10 19:27:21 CST 2007

Well, it's almost certain to be 4,800, 9,600 or 19,200 baud ... only 3
choices, so I'd attack this by trial and error.

Barry Watzman

-----Original Message-----
From: sebhc-bounces at sebhc.org [mailto:sebhc-bounces at sebhc.org] On Behalf Of
Bob Shannon
Sent: Wednesday, January 10, 2007 20:03 PM
To: sebhc at sebhc.org
Subject: Re: [sebhc] HDOS sysgen questions (and problems)

Hello Dwight,

Yes, the H89 does an auto-baud detect, the first time it boots from
a newly formatted disk.  Then it patches itself and auto-starts at that
baud rate.

I can boot and run HDOS fine, but I don't know what the baud rate
settings are currently.

When I boot the CP/M disk I was sent, I get the 'wrong baud rate'
gibberish issue.

Not a UART socket issue, probably not a RAM issue either.  The
CP/M disk I received came from another H89, which is probably setup
differently than mine.

----- Original Message ----- 
From: "dwight elvey" <dkelvey at hotmail.com>
To: <sebhc at sebhc.org>
Sent: Tuesday, January 09, 2007 1:01 AM
Subject: Re: [sebhc] HDOS sysgen questions (and problems)

> Hi Bob
> As I recall, the H89 did an auto detect on the speed. I believe
> that the H19 part is set to 4800baud but I could be wrong on
> that, it may have been 9600.
> It sounds like you may have a RAM issue or socket issue for the
> serial chip. You should be able to make up a simple wire to connector
> to monitor the comunications with a PC in the serial mode.
> I don't recall if there was a jumper select on the H89 side for
> the buad rate but it seems like I recall on on the H19 side.
> I've not tried the CP/M so can't comment on that.
> Dwight
>>From: "Bob Shannon" <bshannon at tiac.net>
>>Reply-To: sebhc at sebhc.org
>>To: <sebhc at sebhc.org>
>>Subject: Re: [sebhc] HDOS sysgen questions (and problems)
>>Date: Mon, 8 Jan 2007 18:25:20 -0500
>>Happy New Year,
>>Getting back to old computers once again, I tested the disk Mark kindly
>>sent.  The machine 'seems' to boot, but I get gibberish on the console.
>>Typing seems to echo gibberish, sure looks like a baud rate issue to me.
>>I don't have much documentation, and what I have is not what I expect
>>from Heath.  So how do I figure out what baud rate my H19-part and
>>my H89-part are speaking to one another?
>>What baud rate is the CP/M disk image expecting?
>>Just how easy is it to 'jumper' the H89-part to something other than the
>>H19-part?  It would be really cool if you could do that from outside the
>>----- Original Message ----- From: "Mark Garlanger" <garlanger at gmail.com>
>>To: <sebhc at sebhc.org>
>>Sent: Wednesday, November 29, 2006 6:35 PM
>>Subject: Re: [sebhc] HDOS sysgen questions (and problems)
>>>I sent out a copy of CP/M on soft-sectored disks to Bob Shannon, maybe
>>>he'll have a chance to make an image of it. I didn't have time to make
>>>a soft-sectored HDOS disk though, and won't be able to do anything
>>>with my heath computers until after the New Year.
>>>Have you looked at the 'unofficial' HDOS 3.0 images that are in the
>>>archives? If I remember correctly, the notes mentioned that they are
>>>soft-sectored images but I haven't had a chance to played with them to
>>>verify that.
>>Delivered by the SEBHC Mailing List
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