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Groups > comp.sys.apple2 > #16614
| From | Benoit0123 <bgilon@free.fr> |
|---|---|
| Newsgroups | comp.sys.apple2 |
| Subject | Re: How do I access the HGR screen from Assembly? |
| Date | 2013-10-28 07:20 +0000 |
| Organization | Mac GUI |
| Message-ID | <benoit0123-1382944810@macgui.com> (permalink) |
| References | <039ba9d3-4960-4e48-a416-e0477f426b20@googlegroups.com> <0925033c-4c17-4242-a209-50e54be0ab48@googlegroups.com> |
ep88theman wrote: > On Sunday, October 27, 2013 5:22:10 PM UTC-7, gid...@sasktel.net wrote: >> On Sunday, 27 October 2013 15:16:47 UTC-6, Antoine Vignau wrote: >> >> > Learn softswitches >> >> >> >> > c050 >> >> > c052/c053 >> >> > c054/c055 >> >> > c057 >> >> >> >> > Av >> >> >> >> >> >> >> >> Better yet. Learn Applesoft entry points. >> >> >> >> $F3D8 - HGR2 >> >> $F3E2 - HGR >> >> $F605 - XDRAW >> >> $F661 - DRAW >> >> $F6E9 - HCOLOR >> >> $F6FD - HPLOT >> >> $F721 - ROT >> >> $F727 - SCALE > > > Just realized there's a programmers group as well, probably should have > posted this there. > > So the applesoft HGR routine worked to clear the HGR screen, but how do I > use the HPLOT routine example. Do I load the column value to Y (e.g. LDY > #$0004) and the row to the accumulator and then "JRE $F6FD "? Cause that > didn't work. Tried different colors. What's the secret to plotting on > the > HGR screen from assembly? > Have you tried MYCOLOR = 7 COORDXFROM = 260 COORDYFROM = 100 JSR $F3E2 ;Set HGR page 1, displays page 1, draws into page 1 LDX #MYCOLOR JSR $F6F0 ;Calls HCOLOR with color index in X reg. LDX #COORDXFROM LDY #>COORDXFROM LDA #COORDYFROM JSR $F457 ;Calls HPLOT to plot pixel on current page LDA #COORDXTO LDX #>COORDXTO LDY #COORDYTO JSR $F53A ;Calls HLINE to plot a line to "TO" pixel coordinates Applesoft ROM being selected in bank $E0-$FF Otherwise for details upon hires graphics "from the author's mouth", here is a link to reference data: http://www.lulu.com/shop/bill-martens-and-brian-wiser/the-wozpak-special-edition-steve-wozniaks-apple-1-apple-computers/paperback/product-21145348.html#ratingsReview Otherwise I believe that there is an archive of "call apple: all about applesoft" which gives details upon Hires plotting routines within Applesoft and thus to help authors optimize the calls for graphic primitives within the ROM. HTHATS, Benoît
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How do I access the HGR screen from Assembly? ep88theman@gmail.com - 2013-10-27 12:34 -0700
Re: How do I access the HGR screen from Assembly? Marco Verpelli <mverpelli@libero.it> - 2013-10-27 13:31 -0700
Re: How do I access the HGR screen from Assembly? Antoine Vignau <antoine.vignau@laposte.net> - 2013-10-27 14:16 -0700
Re: How do I access the HGR screen from Assembly? gids.rs@sasktel.net - 2013-10-27 17:22 -0700
Re: How do I access the HGR screen from Assembly? Steve Nickolas <usotsuki@buric.co> - 2013-10-28 00:40 +0000
Re: How do I access the HGR screen from Assembly? ep88theman@gmail.com - 2013-10-27 18:01 -0700
Re: How do I access the HGR screen from Assembly? Benoit0123 <bgilon@free.fr> - 2013-10-28 07:20 +0000
Re: How do I access the HGR screen from Assembly? Benoit0123 <bgilon@free.fr> - 2013-10-28 07:21 +0000
Re: How do I access the HGR screen from Assembly? gids.rs@sasktel.net - 2013-10-29 21:35 -0700
Re: How do I access the HGR screen from Assembly? D Finnigan <dog_cow@macgui.com> - 2013-10-28 20:23 +0000
Re: How do I access the HGR screen from Assembly? D Finnigan <dog_cow@macgui.com> - 2013-10-28 15:40 +0000
Re: How do I access the HGR screen from Assembly? Cyril Thibout <info@pulsar-informatique.com> - 2013-10-29 09:39 -0700
Re: How do I access the HGR screen from Assembly? Egan Ford <datajerk@gmail.com> - 2013-10-29 16:10 -0600
Re: How do I access the HGR screen from Assembly? Antoine Vignau <antoine.vignau@laposte.net> - 2013-10-29 19:06 -0700
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