RE: [CAD_CAM_EDM_DRO] Re: TypeMatic Rate

Bert:

Thanks for the geezer's URL. I was using the Int 16H set rate function, but
want to have the repeat rate speeded up only during the jog screen. Then, I
wanted to set it back to its old value. That's what I couldn't find.

Now it appears that I have two ways to do it -

Check and use the BIOS INT-16
Direct I/O to ports 70 and 71 for memory offset 13

Thanks to all for the information.

-- Carol & Jerry Jankura
Strongsville, Ohio
So many toys, so little time....


|-----Original Message-----
|From: Bert Pirson [mailto:hpirson@...]
|Sent: Thursday, February 21, 2002 12:09 PM
|To: CAD_CAM_EDM_DRO@yahoogroups.com
|Subject: Re: [CAD_CAM_EDM_DRO] Re: TypeMatic Rate
|
|
|I haven't been following this thread so forgive me if this doesn't apply.
|
|According to my IBM ROM BIOS book (1988), Int 16H, Function 03H sets the
|repeat (typematic) rate. According to the book, this is good back to the
|PC-AT. It doesn't say anything about Function 09H, or Function 03H
|returning the rate, only setting it.
|
|Searching the web for "Int 16H 03H" found this web site
|http://www.execpc.com/~geezer/osd/kbd/ which had the following:
|
|INT 16h, AH=03h: set typematic (auto-repeat) rate and delay. Before using
|these functions, use INT 16h, AH=09h to check if they are available.
|INT 16h, AH=03h, AL=05h: set repeat rate BL and delay BH
|INT 16h, AH=03h, AL=06h: return current repeat rate in register BL, current
|delay in BH
|
|value in BH 0 1 2 3 delay (msec) 250 500 750 1000
|BL ranges from 0 for fastest (30 Hz) repeat rate, through BL=0Ch
|(10 Hz), up
|to BL=1Fh for slowest (2 Hz) rate
|
|Hope this helps.
|
|Bert
|
|
|----- Original Message -----
|From: "Alan Marconett KM6VV" <KM6VV@...>
|To: <CAD_CAM_EDM_DRO@yahoogroups.com>
|Sent: Thursday, February 21, 2002 2:42 PM
|Subject: [CAD_CAM_EDM_DRO] Re: TypeMatic Rate
|
|
|> Which is code that makes BIOS calls to get a Typematic rate. No doubt
|> the new BIOS routine(s) access CMOS for this data. I'm sure not all
|> (especially old '486 machines) have this.
|>
|>
|
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