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Groups > comp.sys.apple2.programmer > #6021
| Newsgroups | comp.sys.apple2.programmer |
|---|---|
| Date | 2023-03-21 08:59 -0700 |
| References | <4b75fac1-2004-4e0b-b9e2-5dd131af84b5@googlegroups.com> <667f7f7b-7e6e-4c79-901f-d270e3da70b9@googlegroups.com> <666b425f-a539-4969-95fa-16ea1fcd5958@googlegroups.com> <ca6b32f3-6558-4fd0-96bd-b7b17adf6fc9@googlegroups.com> <abfb3e30-38c6-4b10-ad15-736da0019347n@googlegroups.com> |
| Message-ID | <5de2aa09-99d0-4494-92f6-af0c8eb5b661n@googlegroups.com> (permalink) |
| Subject | Re: Vertical Blank on Apple ][+ |
| From | Michael Pohoreski <michael.pohoreski@gmail.com> |
On Thursday, March 16, 2023 at 3:35:50 AM UTC-7, Dave Kay wrote: > I know this conversation was while back now, but thought I'd jump in. When I was young back in the 80's I had an Apple //c (came with the mouse card or similar). I remember experimenting with the VBI back then and managed to get a mouse pointer the size of the original Mac arrow pointer (copied from studying magazines at the time) to move when I moved the mouse on a hi-res screen. Nice! > It was super cool to have this code "running in the background". Yup, one can do all sorts of neat stuff if/when you have a proper Vertical Blanking Interrupt. > I couldn't get anything more than a around 2 bytes x 14 pixels (or so). My ASM wasn't the most efficient though, so I'm sure guys here could get a bit more out of it. I do remember using lookup tables to draw to the screen though. Wish we had access to the internet back then. I had to rely on the odd magazine like Softtalk to help me out.... Fantavision also has a 10x14 px mouse cursor. I should RE/rip that mouse display graphics code someday ... Michael.
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Re: Vertical Blank on Apple ][+ Dave Kay <thavith@gmail.com> - 2023-03-16 03:35 -0700
Re: Vertical Blank on Apple ][+ Michael Pohoreski <michael.pohoreski@gmail.com> - 2023-03-21 08:59 -0700
Re: Vertical Blank on Apple ][+ I am Rob <gids.rs@sasktel.net> - 2023-03-21 15:32 -0700
Re: Vertical Blank on Apple ][+ mmphosis <mmphosis@macgui.com> - 2023-03-23 14:33 +0000
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