/* */
/* */
/* (C) 2000 Freddy Offenga <taf_offenga@yahoo.com> */
-/* 2019-01-14: Bill Kendrick <nbs@sonic.net>: More defines for registers */
+/* 2019-01-16: Bill Kendrick <nbs@sonic.net>: More defines for registers */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
-/* Define a structure with the POKEY register offsets for write (W) */
+/*****************************************************************************/
+/* Define a structure with the POKEY register offsets for write (W) */
+/*****************************************************************************/
+
struct __pokey_write {
unsigned char audf1; /* audio channel #1 frequency */
unsigned char audc1; /* audio channel #1 control */
};
-
-/* AUDC1-4 register values */
+/*****************************************************************************/
+/* (W) AUDC1-4 register values */
+/*****************************************************************************/
/* Meaningful values for the distortion bits.
** The first process is to divide the clock value by the frequency,
#define AUDC_VOLUME_ONLY 0x10
-/* AUDCTL register values */
+/*****************************************************************************/
+/* (W) AUDCTL register values */
+/*****************************************************************************/
#define AUDCTL_CLOCKBASE_15HZ 0x01 /* Switch main clock base from 64 KHz to 15 KHz */
#define AUDCTL_HIGHPASS_CHAN2 0x02 /* Insert high pass filter into channel two, clocked by channel four */
#define AUDCTL_9BIT_POLY 0x80 /* Makes the 17 bit poly counter into nine bit poly (see also: RANDOM) */
-/* IRQEN register values */
+/*****************************************************************************/
+/* (W) IRQEN register values */
+/*****************************************************************************/
#define IRQEN_TIMER_1 0x01 /* The POKEY timer one interrupt is enabled */
#define IRQEN_TIMER_2 0x02 /* The POKEY timer two interrupt is enabled */
#define IRQEN_BREAK_KEY 0x80 /* The BREAK key is enabled */
-/* SKCTL register values */
+/*****************************************************************************/
+/* (W) SKCTL register values */
+/*****************************************************************************/
#define SKCTL_KEYBOARD_DEBOUNCE 0x01 /* Enable keyboard debounce circuits */
#define SKCTL_KEYBOARD_SCANNING 0x02 /* Enable keyboard scanning circuit */
-#define SKCTL_FAST_POT_SCAN 0x04 /* Fast pot scan */
-/* The pot scan counter completes its sequence in two TV line times instead of
+/* Fast pot scan
+** The pot scan counter completes its sequence in two TV line times instead of
** one frame time (228 scan lines). Not as accurate as the normal pot scan
*/
+#define SKCTL_FAST_POT_SCAN 0x04
-#define SKCTL_TWO_TONE_MODE 0x08 /* POKEY two-tone mode */
-/* Serial output is transmitted as a two-tone signal rather than a logic true/false. */
+/* POKEY two-tone mode
+** Serial output is transmitted as a two-tone signal rather than a logic true/false.
+*/
+#define SKCTL_TWO_TONE_MODE 0x08
+
+/* Force break (serial output to zero) */
+#define SKCTL_FORCE_BREAK 0x80
/* Bits 4, 5, and 6 of SKCTL set Serial Mode Control: */
-#define SKCTL_SER_MODE_TX_EXT_RX_EXT 0x00
/* Trans. & Receive rates set by external clock; Also internal clock phase reset to zero. */
+#define SKCTL_SER_MODE_TX_EXT_RX_EXT 0x00
-#define SKCTL_SER_MODE_TX_EXT_RX_ASYNC 0x10
/* Trans. rate set by external clock; Receive asynch. (ch. 4) (CH3 and CH4). */
+#define SKCTL_SER_MODE_TX_EXT_RX_ASYNC 0x10
-#define SKCTL_SER_MODE_TX_CH4_RX_CH4_BIDIR 0x20
/* Trans. & Receive rates set by Chan. 4; Chan. 4 output on Bi-Direct. clock line. */
+#define SKCTL_SER_MODE_TX_CH4_RX_CH4_BIDIR 0x20
/* N.B.: Bit combination 0,1,1 not useful */
-#define SKCTL_SER_MODE_TX_CH4_RX_EXT 0x40
/* Trans. rate set by Chan. 4; Receive rate set by external clock. */
+#define SKCTL_SER_MODE_TX_CH4_RX_EXT 0x40
/* N.B.: Bit combination 1,0,1 not useful */
-#define SKCTL_SER_MODE_TX_CH2_RX_CH4_BIDIR 0x60
/* Trans. rate set by Chan. 2; Receive rate set by Chan. 4; Chan. 4 out on Bi-Direct. clock line. */
+#define SKCTL_SER_MODE_TX_CH2_RX_CH4_BIDIR 0x60
-#define SKCTL_SER_MODE_TX_CH4_RX_ASYNC 0x70
/* Trans. rate set by Chan. 2; Receive asynch. (chan 3 & 4); Bi-Direct. clock not used (tri-state condition). */
+#define SKCTL_SER_MODE_TX_CH4_RX_ASYNC 0x70
-#define SKCTL_FORCE_BREAK 0x80 /* Force break (serial output to zero) */
-
+/*****************************************************************************/
+/* Define a structure with the POKEY register offsets for read (R) */
+/*****************************************************************************/
-/* Define a structure with the POKEY register offsets for read (R) */
struct __pokey_read {
unsigned char pot0; /* paddle 0 value */
unsigned char pot1; /* paddle 1 value */
};
-/* SKSTAT register values */
+/*****************************************************************************/
+/* (R) SKSTAT register values */
+/*****************************************************************************/
+
#define SKSTAT_SERIN_SHIFTREG_BUSY 0x02 /* Serial input shift register busy */
#define SKSTAT_LASTKEY_PRESSED 0x04 /* the last key is still pressed */
#define SKSTAT_SHIFTKEY_PRESSED 0x08 /* the [Shift] key is pressed */
#define SKSTAT_INPUT_FRAMEERROR 0x80 /* Serial data input frame error caused by missing or extra bits. Reset latches as above. */
-/* KBCODE internal keyboard codes for Atari 8-bit computers*/
-
-/* Defined below in the order the keys appear on a 1200XL keyboard,
-** from top left to bottom right.
-** Note: Numerous Shift+Ctrl+key combos are unavailable.
-** (Source: "Compute!'s Thrid Book of Atari", "Reading the Keyboard Codes")
+/* KBCODE, internal keyboard codes for Atari 8-bit computers,
+** are #defined as "KEY_..." in "atari.h".
+** Note some keys are not read via KBCODE:
+** - Reset
+** - Start, Select, and Option; see CONSOL in "gtia.h"
+** - Break
*/
-#define KEYCODE_NONE 255 /* No key pressed (but also Ctrl+Shift+A) */
-
-
-/* Special keys: */
-
-/* N.B. Reset key not handled like other keys */
-
-/* N.B. Select, Start, and Option console keys not handled like other keys;
-** see CONSOL register in GTIA
-*/
-
-/* Fn (function) keys only available on 1200XL */
-#define KEYCODE_F1 3
-#define KEYCODE_F2 4
-#define KEYCODE_F3 19
-#define KEYCODE_F4 20
-
-/* HELP key only available on XL/XE series */
-#define KEYCODE_HELP 17
-
-/* N.B. Break key not handled like other keys */
-
-
-/* Keyboard top row */
-
-#define KEYCODE_ESC 28
-#define KEYCODE_1 31
-#define KEYCODE_2 30
-#define KEYCODE_3 26
-#define KEYCODE_4 24
-#define KEYCODE_5 29
-#define KEYCODE_6 27
-#define KEYCODE_7 51
-#define KEYCODE_8 53
-#define KEYCODE_9 48
-#define KEYCODE_0 50
-#define KEYCODE_LT 54
-#define KEYCODE_GT 55
-#define KEYCODE_BKSPC 52
-
-
-/* Keyboard second row */
-
-#define KEYCODE_TAB 44
-#define KEYCODE_Q 47
-#define KEYCODE_W 46
-#define KEYCODE_E 42
-#define KEYCODE_R 40
-#define KEYCODE_T 45
-#define KEYCODE_Y 43
-#define KEYCODE_U 11
-#define KEYCODE_I 13
-#define KEYCODE_O 8
-#define KEYCODE_P 10
-#define KEYCODE_MINUS 14
-#define KEYCODE_EQUALS 15
-#define KEYCODE_RETURN 12
-
-
-/* Keyboard third row */
-
-#define KEYCODE_CTRL 128 /* binary OR'd */
-/* N.B. Cannot read Ctrl key alone */
-
-#define KEYCODE_A 63
-#define KEYCODE_S 62
-#define KEYCODE_D 58
-#define KEYCODE_F 56
-#define KEYCODE_G 61
-#define KEYCODE_H 57
-#define KEYCODE_J 1
-#define KEYCODE_K 5
-#define KEYCODE_L 0
-#define KEYCODE_SEMICOLON 2
-#define KEYCODE_PLUS 6
-#define KEYCODE_ASTERISK 7
-#define KEYCODE_CAPS 60
-
-
-/* Keyboard bottom row */
-
-#define KEYCODE_SHIFT 64 /* binary OR'd */
-/* N.B. Cannot read Shift key alone via KBCODE;
-** instead, check "Shfit key press" bit of SKSTAT register
-*/
-
-#define KEYCODE_Z 23
-#define KEYCODE_X 22
-#define KEYCODE_C 18
-#define KEYCODE_V 16
-#define KEYCODE_B 21
-#define KEYCODE_N 35
-#define KEYCODE_M 37
-#define KEYCODE_COMMA 32
-#define KEYCODE_PERIOD 34
-#define KEYCODE_SLASH 38
-#define KEYCODE_FUJI 39 /* (as seen on 400/800) */
-#define KEYCODE_INVERSE 39 /* (alternative name; as seen on XL/XE) */
-
-/* N.B. No way to tell left from right Shift keys */
-
-
-/* Keyboard Space key */
-
-#define KEYCODE_SPACE 33
-
/* End of _pokey.h */
#endif /* #ifndef __POKEY_H */
projects / cc65 / blobdiff