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Added a 320x200x256 TGI driver to the Commander X16 library.

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Made the mandelbrot sample program handle the X16's 256 colors.
This commit is contained in:
Greg King
2020-07-15 17:11:38 -04:00
parent 72fff0cfbc
commit 4296cbaf82
6 changed files with 465 additions and 22 deletions
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37
doc/cx16.sgml
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@@ -16,9 +16,12 @@ compiler.
<sect>Overview<p>
The Commander X16 is a modern small computer with firmware that is based on
the ROMs in Commodore's VIC-20 and 64C. It has a couple of I/O chips
(WDC65C22 VIA) that are like the ones in the VIC-20.
The Commander X16 is a modern small computer with firmware that is based partly
on the ROMs in Commodore's VIC-20 and 64C. It has a couple of I/O chips
(WDC65C22 VIA) that are like the ones in the VIC-20. It supports file storage
on Secure Digital cards. It allows two joysticks and a mouse. It has three
sound devices. It's VGA screen has twice the range of the C64 (similar to the
C128's 80-column screen), with 256 colors.
This file contains an overview of the CX16 run-time system as it comes with the
cc65 C compiler. It describes the memory layout, CX16-specific header files,
@@ -108,7 +111,7 @@ cl65 -o file.prg -t cx16 -C cx16-asm.cfg source.s
To generate code that loads to &dollar;A000:
<tscreen><verb>
cl65 -o file.prg -Wl -S,$A000 -t cX16 -C cX16-asm.cfg source.s
cl65 -o file.prg -Wl -S,$A000 -t cx16 -C cx16-asm.cfg source.s
</verb></tscreen>
It also is possible to add a small BASIC header to the program, that uses SYS
@@ -208,12 +211,22 @@ structures, accessing the struct fields will access the chip registers.
<sect>Loadable drivers<p>
The names in the parentheses denote the symbols to be used for static linking of the drivers.
The names in the parentheses denote the symbols to be used for static linking
of the drivers. The names fit into the 8.3 character limit of the SD-Card's
FAT32 file-system.
<sect1>Graphics drivers<p>
No graphics drivers are available currently for the CX16.
The default drivers, <tt/tgi_stddrv (tgi_static_stddrv)/,
point to <tt/cx320p1.tgi (cx320p1_tgi)/.
<descrip>
<tag><tt/cx320p1.tgi (cx320p1_tgi)/</tag>
This driver features a resolution of 320 across and 200 down with 256 colors,
and a slightly adjustable palette (the order of the colors can be changed in
a way that's compatible with some of the other color drivers).
</descrip><p>
<sect1>Extended memory drivers<p>
@@ -224,10 +237,10 @@ No extended memory drivers are available currently for the CX16.
<sect1>Joystick drivers<p>
The default drivers, <tt/joy_stddrv (joy_static_stddrv)/,
point to <tt/cX16-std.joy (cx16_std_joy)/.
point to <tt/cx16-std.joy (cx16_std_joy)/.
<descrip>
<tag><tt/cX16-std.joy (cX16_std_joy)/</tag>
<tag><tt/cx16-std.joy (cx16_std_joy)/</tag>
Supports up to two NES (and SNES) controllers connected to the joystick ports
of the CX16. It reads the four directions, and the <bf/A/, <bf/B/,
<bf/Select/, and <bf/Start/ buttons. Buttons <bf/A/ and <bf/B/ are
@@ -238,15 +251,15 @@ point to <tt/cX16-std.joy (cx16_std_joy)/.
<sect1>Mouse drivers<p>
The default drivers, <tt/mouse_stddrv (mouse_static_stddrv)/,
point to <tt/cX16-std.mou (cx16_std_mou)/.
point to <tt/cx16-std.mou (cx16_std_mou)/.
<descrip>
<tag><tt/cX16-std.mou (cX16_std_mou)/</tag>
<tag><tt/cx16-std.mou (cx16_std_mou)/</tag>
Supports a standard 3-button mouse connected to the PS/2 mouse port of the
Commander X16.
Currently (r35), this driver doesn't support <tt/mouse_move()/
and <tt/mouse_setbox()/.
Currently, this driver doesn't support <tt/mouse_move()/ and
<tt/mouse_setbox()/.
</descrip><p>