1 /*****************************************************************************/
5 /* CPU address space for the 6502 simulator */
9 /* (C) 2003 Ullrich von Bassewitz */
10 /* Römerstrasse 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 /*****************************************************************************/
41 /*****************************************************************************/
43 /*****************************************************************************/
52 typedef struct AddressSpace AddressSpace;
55 struct CPU* CPU; /* Backpointer to CPU */
56 unsigned Size; /* Address space size */
57 struct ChipInstance* Data[1]; /* Pointer to chips, dynamically! */
63 /*****************************************************************************/
65 /*****************************************************************************/
69 AddressSpace* NewAddressSpace (unsigned Size);
70 /* Allocate a new address space and return it */
72 void ASWrite (AddressSpace* AS, unsigned Addr, unsigned char Val);
73 /* Write a byte to a given location */
75 unsigned char ASRead (AddressSpace* AS, unsigned Addr);
76 /* Read a byte from a location */
78 void ASWriteCtrl (AddressSpace* AS, unsigned Addr, unsigned char Val);
79 /* Write a byte to a given location */
81 unsigned char ASReadCtrl (AddressSpace* AS, unsigned Addr);
82 /* Read a byte from a location */
84 void ASAssignChip (AddressSpace* AS, struct ChipInstance* CI,
85 unsigned Addr, unsigned Range);
86 /* Assign a chip instance to memory locations */
88 struct ChipInstance* ASGetChip (const AddressSpace* AS, unsigned Addr);
89 /* Get the chip that is located at the given address (may return NULL). */
93 /* End of addrspace.h */