6502/cc65
1
0
Fork 0
mirror of https://github.com/cc65/cc65.git synced 2024-12-22 12:30:41 +00:00
Code Issues Projects Releases Wiki Activity

Working

Browse Source 
git-svn-id: svn://svn.cc65.org/cc65/trunk@2143 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz 2003-05-04 21:51:13 +00:00
parent 9330f3dc6a
commit e9f6a0a3ab
9 changed files with 812 additions and 609 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/sim65/chip.c
View File

@ -102,10 +102,12 @@ static const SimData Sim65Data = {
Warning,
Error,
Internal,
Break,
GetCfgId,
GetCfgStr,
GetCfgNum
GetCfgNum,
Break,
IRQRequest,
NMIRequest,
};

93
src/sim65/config.c
View File

@ -63,6 +63,92 @@
static void FlagAttr (unsigned* Flags, unsigned Mask, const char* Name)
/* Check if the item is already defined. Print an error if so. If not, set
* the marker that we have a definition now.
*/
{
if (*Flags & Mask) {
CfgError ("%s is already defined", Name);
}
*Flags |= Mask;
}
static void AttrCheck (unsigned Attr, unsigned Mask, const char* Name)
/* Check that a mandatory attribute was given */
{
if ((Attr & Mask) == 0) {
CfgError ("%s attribute is missing", Name);
}
}
static void ParseCPU (void)
/* Parse a CPU section */
{
static const IdentTok Attributes [] = {
{ "TYPE", CFGTOK_TYPE },
{ "ADDRSPACE", CFGTOK_ADDRSPACE },
};
enum {
atNone = 0x0000,
atType = 0x0001,
atAddrSpace = 0x0002
};
unsigned Attr = 0;
unsigned long Size = 0;
while (CfgTok == CFGTOK_IDENT) {
cfgtok_t AttrTok;
CfgSpecialToken (Attributes, ENTRY_COUNT (Attributes), "Attribute");
AttrTok = CfgTok;
/* An optional assignment follows */
CfgNextTok ();
CfgOptionalAssign ();
/* Check which attribute was given */
switch (AttrTok) {
case CFGTOK_TYPE:
FlagAttr (&Attr, atType, "TYPE");
CfgAssureIdent ();
/* ### */
break;
case CFGTOK_ADDRSPACE:
FlagAttr (&Attr, atAddrSpace, "ADDRSPACE");
CfgAssureInt ();
CfgRangeCheck (0x1000, 0x1000000);
Size = CfgIVal;
break;
default:
FAIL ("Unexpected attribute token");
}
/* Skip the attribute value and an optional comma */
CfgNextTok ();
CfgOptionalComma ();
}
/* Must have some attributes */
AttrCheck (Attr, atType, "TYPE");
AttrCheck (Attr, atAddrSpace, "ADDRSPACE");
/* Skip the semicolon */
CfgConsumeSemi ();
}
static void ParseMemory (void)
/* Parse a MEMORY section */
{
@ -241,6 +327,7 @@ static void ParseConfig (void)
/* Parse the config file */
{
static const IdentTok BlockNames [] = {
{ "CPU", CFGTOK_CPU },
{ "MEMORY", CFGTOK_MEMORY },
};
cfgtok_t BlockTok;
@ -258,6 +345,10 @@ static void ParseConfig (void)
/* Read the block */
switch (BlockTok) {
case CFGTOK_CPU:
ParseCPU ();
break;
case CFGTOK_MEMORY:
ParseMemory ();
break;
@ -268,7 +359,7 @@ static void ParseConfig (void)
}
/* Skip closing brace */
CfgConsume (CFGTOK_RCURLY, "`}' expected");
CfgConsumeRCurly ();
} while (CfgTok != CFGTOK_EOF);
}

1164
src/sim65/cpucore.c
View File

File diff suppressed because it is too large Load Diff

35
src/sim65/cpucore.h
View File

@ -38,33 +38,24 @@
/* sim65 */
#include "cpuregs.h"
/*****************************************************************************/
/* Data */
/* Data */
/*****************************************************************************/
/* Registers */
extern unsigned char AC; /* Accumulator */
extern unsigned char XR; /* X register */
extern unsigned char YR; /* Y register */
extern unsigned char SR; /* Status register */
extern unsigned char SP; /* Stackpointer */
extern unsigned PC; /* Program counter */
/* Status register bits */
#define CF 0x01 /* Carry flag */
#define ZF 0x02 /* Zero flag */
#define IF 0x04 /* Interrupt flag */
#define DF 0x08 /* Decimal flag */
#define BF 0x10 /* Break flag */
#define OF 0x40 /* Overflow flag */
#define SF 0x80 /* Sign flag */
extern CPURegs Regs;
/*****************************************************************************/
/* Code */
/* Code */
/*****************************************************************************/
@ -72,20 +63,20 @@ extern unsigned PC; /* Program counter */
void CPUInit (void);
/* Initialize the CPU */
void Reset (void);
/* Reset the CPU */
void RESET (void);
/* Generate a CPU RESET */
void IRQ (void);
void IRQRequest (void);
/* Generate an IRQ */
void NMI (void);
void NMIRequest (void);
/* Generate an NMI */
void Break (const char* Format, ...);
/* Stop running and display the given message */
void CPURun (void);
/* Run the CPU */
/* Run one CPU instruction */

81
src/sim65/cpuregs.h Normal file
View File

@ -0,0 +1,81 @@
/*****************************************************************************/
/* */
/* cpuregs.h */
/* */
/* CPU registers */
/* */
/* */
/* */
/* (C) 2003 Ullrich von Bassewitz */
/* Römerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#ifndef CPUREGS_H
#define CPUREGS_H
/*****************************************************************************/
/* Data */
/*****************************************************************************/
typedef struct CPURegs CPURegs;
struct CPURegs {
unsigned AC; /* Accumulator */
unsigned XR; /* X register */
unsigned YR; /* Y register */
unsigned ZR; /* Z register */
unsigned SR; /* Status register */
unsigned SP; /* Stackpointer */
unsigned PC; /* Program counter */
};
/* Status register bits */
#define CF 0x01 /* Carry flag */
#define ZF 0x02 /* Zero flag */
#define IF 0x04 /* Interrupt flag */
#define DF 0x08 /* Decimal flag */
#define BF 0x10 /* Break flag */
#define OF 0x40 /* Overflow flag */
#define SF 0x80 /* Sign flag */
/*****************************************************************************/
/* Code */
/*****************************************************************************/
/* End of cpuregs.h */
#endif

7
src/sim65/main.c
View File

@ -308,9 +308,10 @@ int main (int argc, char* argv[])
CfgRead ();
CPUInit ();
#if 1
CPURun ();
#endif
while (1) {
CPURun ();
}
/* Return an apropriate exit code */
return EXIT_SUCCESS;

10
src/sim65/scanner.c
View File

@ -237,7 +237,7 @@ Again:
break;
case '.':
NextChar ();
NextChar ();
if (C == '.') {
NextChar ();
CfgTok = CFGTOK_DOTDOT;
@ -328,6 +328,14 @@ void CfgConsumeColon (void)
void CfgConsumeRCurly (void)
/* Consume a right curly brace */
{
CfgConsume (CFGTOK_RCURLY, "`}' expected");
}
void CfgOptionalComma (void)
/* Consume a comma if there is one */
{

10
src/sim65/scanner.h
View File

@ -37,7 +37,7 @@
#define SCANNER_H
/* common */
#include "attrib.h"
@ -66,8 +66,13 @@ typedef enum {
CFGTOK_EOF,
/* Primary blocks */
CFGTOK_CPU,
CFGTOK_MEMORY,
/* CPU block */
CFGTOK_TYPE,
CFGTOK_ADDRSPACE,
/* Special identifiers */
CFGTOK_TRUE,
CFGTOK_FALSE
@ -122,6 +127,9 @@ void CfgConsumeSemi (void);
void CfgConsumeColon (void);
/* Consume a colon */
void CfgConsumeRCurly (void);
/* Consume a right curly brace */
void CfgOptionalComma (void);
/* Consume a comma if there is one */

15
src/sim65/simdata.h
View File

@ -67,9 +67,6 @@ struct SimData {
void (*Internal) (const char* Format, ...);
/* Print an internal program error and terminate */
void (*Break) (const char* Format, ...);
/* Stop the CPU and display the given message */
int (*GetCfgId) (void* CfgInfo, const char* Name, char** Id);
/* Search CfgInfo for an attribute with the given name and type "id". If
* found, remove it from the configuration, pass a pointer to a dynamically
@ -91,6 +88,18 @@ struct SimData {
* If found, remove it from the configuration, copy it into Val and return
* true. If not found, return false.
*/
void (*Break) (const char* Format, ...);
/* Stop the CPU and display the given message */
void (*IRQ) (void);
/* Issue an irq request */
void (*NMI) (void);
/* Issue an nmi request */
};