1 /*****************************************************************************/
5 /* Atari Lynx, Mikey chip register hardware structures */
8 /* This software is provided 'as-is', without any expressed or implied */
9 /* warranty. In no event will the authors be held liable for any damages */
10 /* arising from the use of this software. */
12 /* Permission is granted to anyone to use this software for any purpose, */
13 /* including commercial applications, and to alter it and redistribute it */
14 /* freely, subject to the following restrictions: */
16 /* 1. The origin of this software must not be misrepresented; you must not */
17 /* claim that you wrote the original software. If you use this software */
18 /* in a product, an acknowledgment in the product documentation would be */
19 /* appreciated but is not required. */
20 /* 2. Altered source versions must be plainly marked as such, and must not */
21 /* be misrepresented as being the original software. */
22 /* 3. This notice may not be removed or altered from any source */
25 /*****************************************************************************/
31 typedef struct _mikey_timer {
33 unsigned char control;
35 unsigned char control2;
38 typedef struct _mikey_all_timers {
39 struct _mikey_timer timer[8];
42 /* audio channel structure */
43 typedef struct _mikey_audio {
45 unsigned char feedback;
47 unsigned char shiftlo;
49 unsigned char control;
54 /* Define a structure with the mikey register offsets */
56 struct _mikey_timer timer0; // 0xFD00
57 struct _mikey_timer timer1; // 0xFD04
58 struct _mikey_timer timer2; // 0xFD08
59 struct _mikey_timer timer3; // 0xFD0C
60 struct _mikey_timer timer4; // 0xFD10
61 struct _mikey_timer timer5; // 0xFD14
62 struct _mikey_timer timer6; // 0xFD18
63 struct _mikey_timer timer7; // 0xFD1C
64 struct _mikey_audio channel_a; // 0xFD20
65 struct _mikey_audio channel_b; // 0xFD28
66 struct _mikey_audio channel_c; // 0xFD30
67 struct _mikey_audio channel_d; // 0xFD38
68 unsigned char attena; // 0xFD40 ?? not yet allocated?
69 unsigned char attenb; // 0xFD41 |
70 unsigned char attenc; // 0xFD42 |
71 unsigned char attend; // 0xFD43 |
72 unsigned char panning; // 0xFD44 |
73 unsigned char unused0[11]; // 0xFD45 - 0xFD4F not used
74 unsigned char mstereo; // 0xFD50 stereo control bits
75 unsigned char unused1[47]; // 0xFD51 - 0xFD7F not used
76 unsigned char intrst; // 0xFD80 interrupt poll 0
77 unsigned char intset; // 0xFD81 interrupt poll 1
78 unsigned char unused2[2]; // 0xFD82 - 0xFD83 not used
79 unsigned char magrdy0; // 0xFD84 mag tape channel0 ready bit
80 unsigned char magrdy1; // 0xFD85 mag tape channel1 ready bit
81 unsigned char audin; // 0xFD86 audio in
82 unsigned char sysctl1; // 0xFD87 control bits
83 unsigned char mikeyrev; // 0xFD88 mikey hardware rev
84 unsigned char mikeysrev; // 0xFD89 mikey software rev
85 unsigned char iodir; // 0xFD8A parallel i/o data dir
86 unsigned char iodat; // 0xFD8B parallel data
87 unsigned char serctl; // 0xFD8C serial control register
88 unsigned char serdat; // 0xFD8D serial data
89 unsigned char unused3[2]; // 0xFD8E - 0xFD8F not used
90 unsigned char sdoneack; // 0xFD90 suzy done acknowledge
91 unsigned char cpusleep; // 0xFD91 cpu bus request disable
92 unsigned char dispctl; // 0xFD92 video bus request enable, viddma
93 unsigned char pkbkup; // 0xFD93 magic 'P' count
94 unsigned char *scrbase; // 0xFD94 start address of video display
95 unsigned char unused4[6]; // 0xFD96 - 0xFD9B not used
96 unsigned char mtest0; // 0xFD9C
97 unsigned char mtest1; // 0xFD9D
98 unsigned char mtest2; // 0xFD9E
99 unsigned char unused5; // 0xFD9F not used
100 unsigned char palette[32]; // 0xFDA0 - 0xFDBF palette 32 bytes
101 // 0xFDC0 - 0xFDFF not used