Apple-2-SW/apple2_hgr_font_tutorial
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Added link to PC BIOS Character set

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Michaelangel007 2016-01-12 06:32:58 -08:00
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README.md
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#Apple ]\[ HGR Font Tutorial #Apple ]\[ HGR Font Tutorial
Revision: 25, Jan 11, 2016. Revision: 26, Jan 11, 2016.
# Table of Contents # Table of Contents
@ -253,7 +253,7 @@ The `TEXT` screen is 40x24 characters. The high resolution graphics `HGR` screen
Char Height (px/character) = Screen Height (px) / Rows (characters) = 192/24 = 8 Char Height (px/character) = Screen Height (px) / Rows (characters) = 192/24 = 8
Unfortunately, the data for the TEXT ROM 25123 hardware chip is **not** accessible from the 6502. :-/ This means you will need to manually enter in the 8 bytes/character. :-( The good news is that I've already done this so you can copy / paste. :-) Unfortunately, the data for the TEXT ROM 25123 hardware chip is **not** accessible from the 6502 unlike say the [IBM PC BIOS Character Sets](http://nerdlypleasures.blogspot.com/2015/04/ibm-character-fonts.html).:-/ T his means you will need to manually enter in the 8 bytes/character. :-( The good news is that I've already done this so you can copy / paste. :-)
You can find a picture of the Apple ][ ROM text font on Page 8-9, diagram 8.4 of "Understanding the Apple ]\[" You can find a picture of the Apple ][ ROM text font on Page 8-9, diagram 8.4 of "Understanding the Apple ]\["
https://archive.org/stream/understanding_the_apple_ii#page/n203/mode/2up https://archive.org/stream/understanding_the_apple_ii#page/n203/mode/2up