[sebhc] Forth disk

Jack Rubin jack.rubin at ameritech.net
Tue Jun 22 17:40:52 CDT 2004


Guess I'll have to dig out my Leo Brodie books and figure out what
you're up to!


> -----Original Message-----
> From: sebhc at sebhc.org [mailto:sebhc at sebhc.org] On Behalf Of 
> Dwight K. Elvey
> Sent: Tuesday, June 22, 2004 4:49 PM
> To: sebhc at sebhc.org
> Subject: Re: [sebhc] Forth disk
> Hi All
>  I did some more work on the stuff last night.
> I realize now that the version on the ftp will
> only work on the H89. I don't know why but I thought
> that the console serial would be the same for both
> the H89 and the H8 w/ H8-5. As it turns out, they
> are not the same. The H89 uses a 8250 to talk to
> the monitor, similar to what is on the H8-4 but
> at a different address. The H8-5 is a 8251. To make
> things a little more tricky, I used the receive
> interrupt in the Forth. It'll take me a day or
> two more to get this stuff incorporated into the
> meta source so I can generate the needed image.
>  I've already dealt with both types of serial chips
> in my image loader so it is just a matter of patching
> things in. I expect that, initially, I'll have three
> versions. One for the H89, one for the H8 w/ H8-5
> and one for the H8 w/ H8-4. I may make a universal
> one later that will detect what port is being used
> with the [SPACE] request used by HDOS.
>  I also send a sequence on boot to the monitor to
> switch it to the capital letter mode. This is only useful
> for the H89 or H19 but not for a truely dumb terminal
> like the H9. I suspect I'll modify this to default
> to nothing and leave a switch in the meta compiler
> to select the H19/H89 escape setup.
>  I do have it running on the H8 but without a head.
> Patching the right serial address and port access
> method will bring it fully to life. I just need the
> free time in the evenings to get it done.
> Dwight
> >From: "Dwight K. Elvey" <dwight.elvey at amd.com>
> >
> >Hi
> > I worked a bunch on this over the weekend but
> >still didn't get a chance to boot it on a H8.
> >I'm still fiddling on the H89.
> >>From what I know now, you'd need a machine with
> >48K RAM and a H8-5 Ser/Cas board to use the one
> >in the ftp.
> ---snip---
> --
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