Apple-2-SW/apple2_hgr_font_tutorial
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Add assembly HgrLoY HgrHiY

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Michaelangel007 2016-01-27 13:08:20 -08:00
parent 651d4f4cc4
commit 34bf8c8d1a
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README.md
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@ -1,6 +1,6 @@
#Apple ]\[ //e HGR Font 6502 Assembly Language Tutorial #Apple ]\[ //e HGR Font 6502 Assembly Language Tutorial
Revision: 52, Jan 27, 2016. Revision: 53, Jan 27, 2016.
# Table of Contents # Table of Contents
@ -1754,7 +1754,21 @@ We'll split this table of 16-bit addresses into Low and High bytes for easier ac
This is our mini HGR Y Address look-up table. "Funny" that it has 24 entries -- the same height as our text screen. :-) This is our mini HGR Y Address look-up table. "Funny" that it has 24 entries -- the same height as our text screen. :-)
Enter these bytes (or save [hgrtable.bin](hgrtable.bin) and `bload hgrtable.bin,3A0`): Listing 9a:
```assembly
ORG $03A0
HgrLoY
DFB $00,$80,$00,$80,$00,$80,$00,$80
DFB $28,$A8,$28,$A8,$28,$A8,$28,$A8
DFB $50,$D0,$50,$D0,$50,$D0,$50,$D0
HgrHiY
DFB $00,$00,$01,$01,$02,$02,$03,$03
DFB $00,$00,$01,$01,$02,$02,$03,$03
DFB $00,$00,$01,$01,$02,$02,$03,$03
```
Enter these bytes (or download [hgrtable.bin](hgrtable.bin) and `BLOAD HGRTABLE.BIN,3A0`):
Our `HgrLoY` table: Our `HgrLoY` table: