[Coco] Heathkit H89

[Bill Gunshannon]

________________________________________
From: Coco [coco-bounces at maltedmedia.com] on behalf of Rob Rosenbrock [bester at adamswells.com]
Sent: Saturday, April 22, 2017 1:24 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] Heathkit H89

>
> Since someone mentioned the H89 I was wondering if there is any
> compatibility between mod 1/3 software and the Heath.  The only reason I
> ever picked one up is because it also uses the Zilog Z80. (actually a pair
> of them clocked higher than the trs80s)
>
> ,
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>
I built an H88/H89 many years ago and succeeded in getting a few programs
converted over, but it took a lot of re-writing.

The biggest difference is that the H88/H89 is essentially a terminal with
a built-in host computer. While the display is part of memory on the
TRS-80, video on the H88/H89 is handled by sending characters to the
display. Instead of using PRINT@, you use an ESC sequence. Also, the crude
graphics on the TRS-80 are non-existent on the H88/H89.

____________________________________

Am I the only one here who found it funny to call the TRS-80's graphics "crude"
while comparing it to a system where the alternative is nothing?  :-)

bill