Apple-2-SW/apple2_hgr_font_tutorial
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Fix hex prefix

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Michaelangel007 2016-03-27 08:28:13 -07:00
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README.md
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@ -1,7 +1,7 @@
#Apple ]\[ //e HGR Font 6502 Assembly Language Tutorial #Apple ]\[ //e HGR Font 6502 Assembly Language Tutorial
By: Michael Pohoreski By: Michael Pohoreski
Revision: 69, Mar 27, 2016. Revision: 70, Mar 27, 2016.
# Table of Contents # Table of Contents
@ -124,7 +124,7 @@ The 40x24 text screen of the Apple is _"memory-mapped"_ -- that is by directly s
![Screenshot TEXT inverse A](pics/text_inverse_a.png?raw=true) ![Screenshot TEXT inverse A](pics/text_inverse_a.png?raw=true)
The control characters show up in `inverse`, ASCII characters show up `flashing`, and our normal character requires the high bit to be set. 0x41 + 080 = 0xC1. The control characters show up in `inverse`, ASCII characters show up `flashing`, and our normal character requires the high bit to be set. 0x41 + 0x80 = 0xC1.
<hr> <hr>
A slight fun diversion: If you are on an enhanced Apple //e or //c we can activate a 2nd character set called `Mouse Text`. This replaces all the flashing text with special drawing characters that help make a text based UI. A slight fun diversion: If you are on an enhanced Apple //e or //c we can activate a 2nd character set called `Mouse Text`. This replaces all the flashing text with special drawing characters that help make a text based UI.