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creating Xcode project and adjusting extern variables.

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Thiago Auler dos Santos 2017-11-16 00:28:59 -02:00
parent 6651b76f61
commit 680f44ed30
6 changed files with 364 additions and 68 deletions
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280
apple1.xcodeproj/project.pbxproj Normal file
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@ -0,0 +1,280 @@
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7
apple1.xcodeproj/project.xcworkspace/contents.xcworkspacedata generated Normal file
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@ -0,0 +1,7 @@
<?xml version="1.0" encoding="UTF-8"?>
<Workspace
version = "1.0">
<FileRef
location = "self:apple1.xcodeproj">
</FileRef>
</Workspace>

4
src/inc/6502.h
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@ -1,7 +1,7 @@
#ifndef _APPLE_I_6502_H_
#define _APPLE_I_6502_H_
void init();
void run();
void init(void);
void run(void);
#endif

1
src/inc/memory.h
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@ -2,7 +2,6 @@
#define _APPLE_I_MEMORY_H_
#include "types.h"
db read_byte(dw address);
dw read_word(dw address);
void write_mem(dw address, db data);

130
src/inc/opcodes.h
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@ -3,13 +3,13 @@
#include "types.h"
dw pc; // program counter
db ac; // accumulator
db x; // x register
db y; // y register
db sp; // stack pointer
db sr; // status register
db ir; // instruction register
extern dw pc; // program counter
extern db ac; // accumulator
extern db x; // x register
extern db y; // y register
extern db sp; // stack pointer
extern db sr; // status register
extern db ir; // instruction register
enum opcodes_table
{ /// aaa00 aaa01 aaa10
@ -51,65 +51,65 @@ typedef enum opcodes_table oct;
typedef enum opcodes_list ocl;
typedef enum address_mode am;
am address_mode;
extern am address_mode;
void adc(); // add memory to accumulator with carry
void and(); // and memory with accumulator
void asl(); // shift left one bit (memory or accumulator)
void bcc(); // branch on carry clear
void bcs(); // branch on carry set
void beq(); // branch on result zero
void bit(); // test bits in memory with accumulator
void bmi(); // branch on result minus
void bne(); // branch on result not zero
void bpl(); // branch on result plus
void brk(); // force break
void bvc(); // branch on overflow clear
void bvs(); // branch on overflow set
void clc(); // clear carry flag
void cld(); // clear decimal mode
void cli(); // clear interrupt disable bit
void clv(); // clear overflow flag
void cmp(); // compare memory with accumulator
void cpx(); // compare memory and index x
void cpy(); // compare memory and index y
void dec(); // decrement memory by one
void dex(); // decrement index x by one
void dey(); // decrement index y by one
void eor(); // exclusive-or memory with accumulator
void inc(); // increment memory by one
void inx(); // increment index x by one
void iny(); // increment index y by one
void jmp(); // jump to new location (indirect)
void jpa(); // jump to new location (absolute)
void jsr(); // jump to new location saving return address
void lda(); // load accumulator with memory
void ldx(); // load index x with memory
void ldy(); // load index y with memory
void lsr(); // shift one bit right (memory or accumulator)
void nop(); // no operation
void ora(); // or memory with accumulator
void pha(); // push accumulator on stack
void php(); // push processor status on stack
void pla(); // pull accumulator from stack
void plp(); // pull processor status from stack
void rol(); // rotate on bit left (memory or accumulator)
void ror(); // rotate on bit right (memory or accumulator)
void rti(); // return from interrupt
void rts(); // return from subroutine
void sbc(); // subtract memory from accumulator with borrow
void sec(); // set carry flag
void sed(); // set decimal flag
void sei(); // set interrupt disable status
void sta(); // store accumulator in memory
void stx(); // store index x in memory
void sty(); // store index y in memory
void tax(); // transfer accumulator to index x
void tay(); // transfer accumulator to index y
void tsx(); // transfer stack pointer to index x
void txa(); // transfer index x to accumulator
void txs(); // transfer index x to stack pointer
void tya(); // transfer index y to accumulator
void adc(void); // add memory to accumulator with carry
void and(void); // and memory with accumulator
void asl(void); // shift left one bit (memory or accumulator)
void bcc(void); // branch on carry clear
void bcs(void); // branch on carry set
void beq(void); // branch on result zero
void bit(void); // test bits in memory with accumulator
void bmi(void); // branch on result minus
void bne(void); // branch on result not zero
void bpl(void); // branch on result plus
void brk(void); // force break
void bvc(void); // branch on overflow clear
void bvs(void); // branch on overflow set
void clc(void); // clear carry flag
void cld(void); // clear decimal mode
void cli(void); // clear interrupt disable bit
void clv(void); // clear overflow flag
void cmp(void); // compare memory with accumulator
void cpx(void); // compare memory and index x
void cpy(void); // compare memory and index y
void dec(void); // decrement memory by one
void dex(void); // decrement index x by one
void dey(void); // decrement index y by one
void eor(void); // exclusive-or memory with accumulator
void inc(void); // increment memory by one
void inx(void); // increment index x by one
void iny(void); // increment index y by one
void jmp(void); // jump to new location (indirect)
void jpa(void); // jump to new location (absolute)
void jsr(void); // jump to new location saving return address
void lda(void); // load accumulator with memory
void ldx(void); // load index x with memory
void ldy(void); // load index y with memory
void lsr(void); // shift one bit right (memory or accumulator)
void nop(void); // no operation
void ora(void); // or memory with accumulator
void pha(void); // push accumulator on stack
void php(void); // push processor status on stack
void pla(void); // pull accumulator from stack
void plp(void); // pull processor status from stack
void rol(void); // rotate on bit left (memory or accumulator)
void ror(void); // rotate on bit right (memory or accumulator)
void rti(void); // return from interrupt
void rts(void); // return from subroutine
void sbc(void); // subtract memory from accumulator with borrow
void sec(void); // set carry flag
void sed(void); // set decimal flag
void sei(void); // set interrupt disable status
void sta(void); // store accumulator in memory
void stx(void); // store index x in memory
void sty(void); // store index y in memory
void tax(void); // transfer accumulator to index x
void tay(void); // transfer accumulator to index y
void tsx(void); // transfer stack pointer to index x
void txa(void); // transfer index x to accumulator
void txs(void); // transfer index x to stack pointer
void tya(void); // transfer index y to accumulator
#define N_IS_SET (sr & 0b10000000) // negative
#define N_SET sr = sr | 0b10000000

10
src/opcodes.c
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@ -1,6 +1,16 @@
#include "inc/opcodes.h"
#include "inc/memory.h"
dw pc; // program counter
db ac; // accumulator
db x; // x register
db y; // y register
db sp; // stack pointer
db sr; // status register
db ir; // instruction register
am address_mode;
dw address;
db operand;