source: buchla-68k/include/fpu.h@ 57425b6

Last change on this file since 57425b6 was aa021e2, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Don't shift negative constants.

  • Property mode set to 100644
File size: 1.3 KB
Line 
1/*
2 =============================================================================
3 fpu.h -- FPU definitions
4 Version 4 -- 1987-11-05 -- D.N. Lynx Crowe
5 =============================================================================
6*/
7
8#pragma once
9
10/* preprocessor functions */
11
12#define FPUVAL(x) ((x) << 5)
13
14/* FPU data areas (word offsets) */
15
16#define FPU_OWST 0x00000000L /* waveshape tables */
17#define FPU_OFNC 0x00002000L /* functions */
18#define FPU_OINT 0x00002000L /* interrupt read address */
19#define FPU_OICL 0x00003000L /* interrupt clear address */
20#define FPU_OCFG 0x00002FF0L /* configuration words */
21#define FPU_OSYN 0x00002FFFL /* sync word */
22
23/* FPU time limits */
24
25#define FPU_MAXT 0xFFF0 /* FPU maximum time (65520 ms) */
26#define FPU_MINT 0x800F /* FPU minimum time (1 ms) */
27
28/* FPU value limits */
29
30#define VALMAX (1000 << 5)
31#define VALMIN (-VALMAX)
32
33/* FPU data types */
34
35#define FPU_TCTL 0 /* control */
36#define FPU_TNV0 1 /* new value[0] -- '10' in new value select */
37#define FPU_TCV1 4 /* voltage 1 */
38#define FPU_TSF1 5 /* scale factor 1 */
39#define FPU_TCV2 6 /* voltage 2 */
40#define FPU_TSF2 7 /* scale factor 2 */
41#define FPU_TCV3 8 /* voltage 3 */
42#define FPU_TSF3 9 /* scale factor 3 */
43#define FPU_TMNT 10 /* time mantissa */
44#define FPU_TEXP 11 /* time exponent */
45#define FPU_TNV1 14 /* new value[1] -- '01' in new value select */
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