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Added short documentation of the recently added ioctl for mixing graphics with 4 lines of text.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@4556 b7a2c559-68d2-44c3-8de9-860c34a00d81
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ol.sc
2010-01-24 12:05:22 +00:00
parent 7391c15971
commit d79dae4570
2 changed files with 17 additions and 4 deletions
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6
doc/apple2.sgml
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@@ -316,12 +316,18 @@ you cannot do it, it just means that there's no help.
<tag><tt/a2.lo.tgi/</tag> <tag><tt/a2.lo.tgi/</tag>
This driver features a resolution of 40&times;48 with 16 colors. This driver features a resolution of 40&times;48 with 16 colors.
The function <tt/tgi_apple2_mix()/ allows to activate 4 lines of text. The
function clears the corresponding area at the bottom of the screen.
<tag><tt/a2.hi.tgi/</tag> <tag><tt/a2.hi.tgi/</tag>
This driver features a resolution of 280&times;192 with 8 colors and two This driver features a resolution of 280&times;192 with 8 colors and two
hires pages. Note that programs using this driver will have to be linked hires pages. Note that programs using this driver will have to be linked
with <tt/--start-addr $4000/ to reserve the first hires page or with with <tt/--start-addr $4000/ to reserve the first hires page or with
<tt/--start-addr $6000/ to reserve both hires pages. <tt/--start-addr $6000/ to reserve both hires pages.
The function <tt/tgi_apple2_mix()/ allows to activate 4 lines of text. The
function doesn't clear the corresponding area at the bottom of the screen.
In memory constrained situations the memory from &dollar;803 to &dollar;1FFF In memory constrained situations the memory from &dollar;803 to &dollar;1FFF
can be made available to a program by calling <tt/_heapadd ((void *) 0x0803, 0x17FD);/ can be made available to a program by calling <tt/_heapadd ((void *) 0x0803, 0x17FD);/
at the beginning of <tt/main()/. Doing so is beneficial even if the program at the beginning of <tt/main()/. Doing so is beneficial even if the program

15
doc/apple2enh.sgml
View File

@@ -319,14 +319,21 @@ you cannot do it, it just means that there's no help.
<tag><tt/a2e.lo.tgi/</tag> <tag><tt/a2e.lo.tgi/</tag>
This driver features a resolution of 40&times;48 with 16 colors. This driver features a resolution of 40&times;48 with 16 colors.
The function <tt/tgi_apple2_mix()/ allows to activate 4 lines of text. The
function clears the corresponding area at the bottom of the screen.
<tag><tt/a2e.hi.tgi/</tag> <tag><tt/a2e.hi.tgi/</tag>
This driver features a resolution of 280&times;192 with 8 colors and two This driver features a resolution of 280&times;192 with 8 colors and two
hires pages. Note that programs using this driver will have to be linked hires pages. Note that programs using this driver will have to be linked
with <tt/--start-addr $4000/ to reserve the first hires page or with with <tt/--start-addr $4000/ to reserve the first hires page or with
<tt/--start-addr $6000/ to reserve both hires pages. Note that the second <tt/--start-addr $6000/ to reserve both hires pages.
hires page is only available if the text display is not in 80 column mode.
This can be asserted by calling <tt/videomode (VIDEOMODE_40COL);/ before Note that the second hires page is only available if the text display is not in
installing the driver. 80 column mode. This can be asserted by calling <tt/videomode (VIDEOMODE_40COL);/
before installing the driver.
The function <tt/tgi_apple2_mix()/ allows to activate 4 lines of text. The
function doesn't clear the corresponding area at the bottom of the screen.
In memory constrained situations the memory from &dollar;803 to &dollar;1FFF In memory constrained situations the memory from &dollar;803 to &dollar;1FFF
can be made available to a program by calling <tt/_heapadd ((void *) 0x0803, 0x17FD);/ can be made available to a program by calling <tt/_heapadd ((void *) 0x0803, 0x17FD);/