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Added a 160x192x2 TGI (graphics) driver to the VIC-20 library.

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The driver requires a special linker configuration: "vic20-tgi.cfg".
The VIC-20 computer needs at least 8K of expansion RAM!

"tgidemo.c" needed to be adjusted because the VIC-20's vertical (y) range is greater than its horizontal (x) range -- the opposite of most other platforms.  Also, the circle demo would jam on the VIC-20.
This commit is contained in:
Greg King
2020-07-08 05:55:30 -04:00
parent d1833cc441
commit 410e4502ee
11 changed files with 1253 additions and 23 deletions
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10
libsrc/vic20/libref.s
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@@ -1,10 +1,14 @@
;
; Oliver Schmidt, 2013-05-31
; 2013-05-31, Oliver Schmidt
; 2018-03-11, Sven Michael Klose
;
.export joy_libref
.export em_libref
.export joy_libref
.export tgi_libref
.import _exit
joy_libref := _exit
em_libref := _exit
joy_libref := _exit
tgi_libref := _exit