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Relocate register values outside structs, + more

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Relocated register #define'd values outside of the structs,
improved comment format, expanded & corrected some things.

h/t Trevin Beattie (https://user.xmission.com/~trevin/) for the PIA
register descriptions.
This commit is contained in:
Bill Kendrick
2019-01-15 01:24:12 -08:00
parent d52af69d69
commit 4b61c54092
5 changed files with 385 additions and 163 deletions
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25
include/atari.h
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@@ -86,14 +86,18 @@
#define CH_HLINE 0x12
#define CH_VLINE 0x7C
/* color defines */
/* make GTIA color value */
/* Color definitions */
/* Make a GTIA color value */
#define _gtia_mkcolor(hue,lum) (((hue) << 4) | ((lum) << 1))
/* luminance values go from 0 (black) to 7 (white) */
/* Luminance values go from 0 (black) to 7 (white) */
/* hue values (these can vary depending on TV standard (NTSC vs PAL), tint potentiometer settings, TV tint settings, emulator palette, etc.) */
/* Hue values */
/* (These can vary depending on TV standard (NTSC vs PAL),
** tint potentiometer settings, TV tint settings, emulator palette, etc.)
*/
#define HUE_GREY 0
#define HUE_GOLD 1
#define HUE_GOLDORANGE 2
@@ -112,7 +116,9 @@
#define HUE_YELLOWRED 15
/* Color defines, similar to c64 colors (untested) */
/* Note that the conio color implementation is monochrome (bgcolor and textcolor are only placeholders) */
/* Note that the conio color implementation is monochrome
** (bgcolor and textcolor are only placeholders)
*/
/* Use the defines with the setcolor() or _atari_xxxcolor() functions */
#define COLOR_BLACK _gtia_mkcolor(HUE_GREY,0)
#define COLOR_WHITE _gtia_mkcolor(HUE_GREY,7)
@@ -256,18 +262,18 @@
#define KEY_LEFT (KEY_PLUS | KEY_CTRL)
#define KEY_RIGHT (KEY_ASTERISK | KEY_CTRL)
/* color register functions */
/* Color register functions */
extern void __fastcall__ _setcolor (unsigned char color_reg, unsigned char hue, unsigned char luminace);
extern void __fastcall__ _setcolor_low (unsigned char color_reg, unsigned char color_value);
extern unsigned char __fastcall__ _getcolor (unsigned char color_reg);
/* other screen functions */
/* Other screen functions */
extern int __fastcall__ _graphics (unsigned char mode); /* mode value same as in BASIC */
extern void __fastcall__ _scroll (signed char numlines);
/* numlines > 0 scrolls up */
/* numlines < 0 scrolls down */
/* misc. functions */
/* Misc. functions */
extern unsigned char get_ostype(void); /* get ROM version */
extern unsigned char get_tv(void); /* get TV system */
extern void _save_vecs(void); /* save system vectors */
@@ -275,7 +281,7 @@ extern void _rest_vecs(void); /* restore system vectors */
extern char *_getdefdev(void); /* get default floppy device */
extern unsigned char _is_cmdline_dos(void); /* does DOS support command lines */
/* global variables */
/* Global variables */
extern unsigned char _dos_type; /* the DOS flavour */
#ifndef __ATARIXL__
extern void atr130_emd[];
@@ -443,6 +449,5 @@ struct __iocb {
#define IOCB_FORMAT 0xFE /* format */
/* End of atari.h */
#endif