[sebhc] Forth disk

Dwight K. Elvey dwight.elvey at amd.com
Tue Jun 22 17:54:01 CDT 2004

Hi Jack
 Things like meta compiling are considered "Black Belt"
but I copied this meta compiler from one of the FIG listings
when I was first starting. As with most Forth compiling,
things are single pass. This means that for something like
Forth, there are quite a few post patches. I've since
written my own meta/target compilers. I usually make them
a lot cleaner. Still, this one does work.
 Leo Brodie's book is a fun book to work from but
it is also fun to just dig in and play with stuff before
spending too much time with a book. Also, you'll then
know, better, what things to pay attention to.
 I hope to get the three basic setups running before this
weekend because I'll be off to Yosemite for the weekend.
As long as something else doesn't get in the way, I should
be able to patch the console functions. I can see it loading
into memory and running a loop, looking to send the signon

From: "Jack Rubin" <jack.rubin at ameritech.net>
>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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