Post Reply 
HP-41 and video interface 82163a / 92198a
05-19-2015, 03:51 PM (This post was last modified: 05-19-2015 04:23 PM by Gilles.)
Post: #8
RE: HP-41 and video interface 82163a / 92198a
(05-19-2015 01:21 PM)Vincent Weber Wrote:  Tranks a lot, very informative !
Do you know about this othello program ? Did it make use of cursor control to redraw only the updated part, or if it was reporting everything like a printer ?
Also it talks about being able to scroll up and down form a virtual window of 31 lines compared to the screen 16 lines. Any idea how this was done on a 41 ? Were the bst/sst keys used for that ?

There is no source in the article.

But you can find information in the 82163 owner's manual

There are ESC sequences to move the cursor in the 4 directions and to move cursor to a display address (row column) ( 27 37 column row ). So it seems easy to rewrite only a part of the screen with the ACCHR command. You can also "roll up" (27 83) "roll down" (27 84) the screen etc...
Find all posts by this user
Quote this message in a reply
Post Reply 

Messages In This Thread
RE: HP-41 and video interface 82163a / 92198a - Gilles - 05-19-2015 03:51 PM

User(s) browsing this thread: 1 Guest(s)