1/*****************************************************************************/
2/* */
3/* cpu.c */
4/* */
5/* CPU specifications */
6/* */
7/* */
8/* */
9/* (C) 2003-2011, Ullrich von Bassewitz */
10/* Roemerstrasse 52 */
11/* D-70794 Filderstadt */
12/* EMail: uz@cc65.org */
13/* */
14/* */
15/* This software is provided 'as-is', without any expressed or implied */
16/* warranty. In no event will the authors be held liable for any damages */
17/* arising from the use of this software. */
18/* */
19/* Permission is granted to anyone to use this software for any purpose, */
20/* including commercial applications, and to alter it and redistribute it */
21/* freely, subject to the following restrictions: */
22/* */
23/* 1. The origin of this software must not be misrepresented; you must not */
24/* claim that you wrote the original software. If you use this software */
25/* in a product, an acknowledgment in the product documentation would be */
26/* appreciated but is not required. */
27/* 2. Altered source versions must be plainly marked as such, and must not */
28/* be misrepresented as being the original software. */
29/* 3. This notice may not be removed or altered from any source */
30/* distribution. */
31/* */
32/*****************************************************************************/
33
34
35
36/* common */
37#include "addrsize.h"
38#include "check.h"
39#include "cpu.h"
40#include "strutil.h"
41
42
43
44/*****************************************************************************/
45/* Data */
46/*****************************************************************************/
47
48
49
50/* CPU used */
51cpu_t CPU = CPU_UNKNOWN;
52
53/* Table with target names */
54const char* CPUNames[CPU_COUNT] = {
55 "none",
56 "6502",
57 "6502X",
58 "65SC02",
59 "65C02",
60 "65816",
61 "sweet16",
62 "huc6280",
63 "m740",
64 "4510",
65};
66
67/* Tables with CPU instruction sets */
68const unsigned CPUIsets[CPU_COUNT] = {
69 CPU_ISET_NONE,
70 CPU_ISET_6502,
71 CPU_ISET_6502 | CPU_ISET_6502X,
72 CPU_ISET_6502 | CPU_ISET_65SC02,
73 CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02,
74 CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02 | CPU_ISET_65816,
75 CPU_ISET_SWEET16,
76 CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02 | CPU_ISET_HUC6280,
77 CPU_ISET_6502 | CPU_ISET_M740,
78 CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02 | CPU_ISET_4510,
79};
80
81
82
83/*****************************************************************************/
84/* Code */
85/*****************************************************************************/
86
87
88
89int ValidAddrSizeForCPU (unsigned char AddrSize)
90/* Check if the given address size is valid for the current CPU */
91{
92 switch (AddrSize) {
93 case ADDR_SIZE_DEFAULT:
94 /* Always supported */
95 return 1;
96
97 case ADDR_SIZE_ZP:
98 /* Not supported by None and Sweet16 */
99 return (CPU != CPU_NONE && CPU != CPU_SWEET16);
100
101 case ADDR_SIZE_ABS:
102 /* Not supported by None */
103 return (CPU != CPU_NONE);
104
105 case ADDR_SIZE_FAR:
106 /* Only supported by 65816 */
107 return (CPU == CPU_65816);
108
109 case ADDR_SIZE_LONG:
110 /* Not supported by any CPU */
111 return 0;
112
113 default:
114 FAIL ("Invalid address size");
115 /* NOTREACHED */
116 return 0;
117 }
118}
119
120
121
122cpu_t FindCPU (const char* Name)
123/* Find a CPU by name and return the target id. CPU_UNKNOWN is returned if
124** the given name is no valid target.
125*/
126{
127 unsigned I;
128
129 /* Check all CPU names */
130 for (I = 0; I < CPU_COUNT; ++I) {
131 if (StrCaseCmp (CPUNames [I], Name) == 0) {
132 return (cpu_t)I;
133 }
134 }
135
136 /* Not found */
137 return CPU_UNKNOWN;
138}
139