1 /*****************************************************************************/
5 /* Memory model definitions */
9 /* (C) 2003 Ullrich von Bassewitz */
10 /* Roemerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
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. */
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: */
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 */
32 /*****************************************************************************/
44 /*****************************************************************************/
46 /*****************************************************************************/
50 /* Memory model in use */
51 mmodel_t MemoryModel = MMODEL_UNKNOWN;
53 /* Table with memory model names */
54 static const char* MemoryModelNames[MMODEL_COUNT] = {
60 /* Address sizes for the segments */
61 unsigned char CodeAddrSize = ADDR_SIZE_ABS;
62 unsigned char DataAddrSize = ADDR_SIZE_ABS;
63 unsigned char ZpAddrSize = ADDR_SIZE_ZP;
67 /*****************************************************************************/
69 /*****************************************************************************/
73 mmodel_t FindMemoryModel (const char* Name)
74 /* Find a memory model by name. Return MMODEL_UNKNOWN for an unknown name. */
78 /* Check all CPU names */
79 for (I = 0; I < MMODEL_COUNT; ++I) {
80 if (strcmp (MemoryModelNames[I], Name) == 0) {
86 return MMODEL_UNKNOWN;
91 void SetMemoryModel (mmodel_t Model)
92 /* Set the memory model updating the MemoryModel variables and the address
93 ** sizes for the segments.
96 /* Remember the memory model */
99 /* Set the address sizes for the segments */
100 switch (MemoryModel) {
103 /* Code: near, data: near */
104 CodeAddrSize = ADDR_SIZE_ABS;
105 DataAddrSize = ADDR_SIZE_ABS;
109 /* Code: far, data: near */
110 CodeAddrSize = ADDR_SIZE_FAR;
111 DataAddrSize = ADDR_SIZE_ABS;
115 /* Code: far, data: far */
116 CodeAddrSize = ADDR_SIZE_FAR;
117 DataAddrSize = ADDR_SIZE_FAR;
124 /* Zeropage is always zeropage */
125 ZpAddrSize = ADDR_SIZE_ZP;