[Coco] Webpage Update - Hires Mouse

[Bill Pierce]

David, I stated in my post, the "newres" could be an alternate sub-module just as the serial mouse sub-module, but I was looking at the "joydrv_joy.asm" code (normal Tandy mouse) last night, and I think there's a possibility that the new hires code could be added as an option just as "normal" and "hires interface" are, and be software selectable (just as those are).

The driver does "normal" setup for the joyport (activating PIAs), then splits one of two ways... normal or hires. This is determined by the resolution flag in the mouse packet; 0=lores 1=hires. We would add another flag for 2=newres (or whatever). So this code would have to be added/altered in a couple of other modules as well (?? VTIO, CoWin, CoGrf,??) to add the new flag value to the existing. The more I look at the existing code, the easier it looks.
I'm not quite sure from looking at Nick's code if the joyport setup portion is "normal" or has anything special being done. I need to look closer at this part of the code and compare it to what NOS9 is doing there which is slightly different due to NOS9's interrupt (multitasking) handling. I think once it splits off to the actual X/Y reading, it can be left pretty much as is with the exception of converting it to position independant code (not a problem).
In the end, the X/Y coordinates will be the same as the hi-res interface as NOS9 ALWAYS expects a 640x192 read, converting it later for lower res (40x24, 80x24, 320x192, etc). Normal mouse reads are multiplied to make it 640(x10) and 192(x3) during the read state, so the existing code for "mouse VS window and pixel" operations would remain the same as the expected values would be the same.

I really don't think it would take much added code to make it work. The BIG question would be if the new size of "joydrv_joy.asm" would break any "boundries" in the os9boot. I'm not sure, but I don't think it would.
Someone with a little more intimate knowledge of all the system modules would know where any changes would need to be made in other modules.

As an afterthought, Multi-Vue (actually Control) would need to have the option for the newres added to the settings. I haven't looked at that code, so I'm not sure if it could be added or not. It would just be a 3rd option to set either "hires", "lores", or "newres". The drivers handle the rest (above). All the code for MV's "menu areas" and "scroll bars" is handled by the NOS9 drivers, not by MV. So again, all would remain the same.
Any program that expects the hires interface, should work with the newres as long as it doesn't actually "set" the mouse res. If so, then it would most likely be a one-byte patch to change (without sources). If sources for the software are available (MV is in the repo), then adding the extra choice should be trivial. I know in "Ultimuse3", I could add this choice in just a few lines of code and one more menu choice.

 

 


Bill Pierce
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-----Original Message-----
From: David Ladd <davidwladd at gmail.com>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Wed, Oct 28, 2015 11:25 am
Subject: Re: [Coco] Webpage Update - Hires Mouse


On Tuesday, October 27, 2015, Bill Pierce via Coco
<coco at maltedmedia.com>
wrote:

> What would be nice is to incorporate this into
the NitrOS9 joystick/mouse
> routines.
> We already have sub-modules for the
Tandy original, serial mouse (2
> versions), so to add a sub-module for the new
hi-res should be simple.
> Model it after the Tandy original and add the new
loops. Since the Tandy
> supports the hi-res interface, that code could be
removed and there would
> be plenty of room for the additional code.
>
>
>
Good
idea adding this code to the NitrOS-9 project if author allows it :)

Well I
probably wouldn't delete the old Hi-Res code cause of those who are
purists and
want to still be able to use their original hardware.

I would probably build in
a extra build option that would build both
versions, but that's my 2
cents.




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