diff options
| author | alekseiplusplus <alekseijeaves@protonmail.com> | 2023-04-27 11:19:33 +1000 |
|---|---|---|
| committer | alekseiplusplus <alekseijeaves@protonmail.com> | 2023-04-27 11:19:33 +1000 |
| commit | f86d973b2f5318b5e761e2f682c2aa57d61eb0d6 (patch) | |
| tree | 1563496942ab0b09ed0ee1e2b549ce78a991ebef /headers | |
| parent | 83e8a4494741e6257b18267a58fe8ae342e3229f (diff) | |
Major progress on interpreter
Diffstat (limited to 'headers')
| -rw-r--r-- | headers/6502.h | 2 | ||||
| -rw-r--r-- | headers/addressing.h | 16 | ||||
| -rw-r--r-- | headers/apple.h | 7 | ||||
| -rw-r--r-- | headers/debug.h | 4 |
4 files changed, 24 insertions, 5 deletions
diff --git a/headers/6502.h b/headers/6502.h index ea92479..0835f36 100644 --- a/headers/6502.h +++ b/headers/6502.h @@ -5,7 +5,7 @@ typedef unsigned char byte; typedef unsigned short address; byte acc, X, Y, P, S = 0x00; address PC = 0x0000; -byte Memory[4096]; // TO DO. Add expansion capability to memory. +byte* Memory; // TO DO. Add expansion capability to memory. // FLAGS #define flag_N 0x80 // Negative diff --git a/headers/addressing.h b/headers/addressing.h index 58df3f5..d1b8371 100644 --- a/headers/addressing.h +++ b/headers/addressing.h @@ -33,7 +33,7 @@ typedef struct AddData AddData; //Holds address of current instruction. void* current_instruction; -Addressing fAddressGetLength(Addressing addr){ +int fAddressGetLength(Addressing addr){ switch(addr){ case eAbsolute: case eAbsoluteIndexedX: case eAbsoluteIndexedY: return 3; @@ -44,6 +44,20 @@ Addressing fAddressGetLength(Addressing addr){ } } +int fAddressGetLengthPrempt(int i){ //Check the functions to make sure that there isnt some incorrect values being given for length. + switch(i){ + case 0x6D: case 0x7D: case 0x79: case 0x2D: case 0x3D: case 0x39: case 0x0E: case 0x1E: case 0x2C: case 0xCD: case 0xD0: case 0xD9: case 0xEC: + case 0xCC: case 0xCE: case 0xDE: case 0x4D: case 0x5D: case 0x59: case 0xEE: case 0xFE: case 0x4C: case 0x20: case 0xAD: case 0xBD: case 0xB9: + case 0xAE: case 0xBE: case 0xAC: case 0xBC: case 0x4E: case 0x5E: case 0x0D: case 0x1D: case 0x19: case 0x2E: case 0x3E: case 0x6E: case 0x7E: + case 0xED: case 0xFD: case 0xF9: case 0x8D: case 0x9D: case 0x99: case 0x8E: case 0x8C: + return 3; + case 0x0A: case 0x2A: case 0x4A: case 0x6A: + return 1; + default: + return 2; + } +} + AddData fAddress(Addressing addr, short x) { AddData ret; diff --git a/headers/apple.h b/headers/apple.h index f5cac5c..cfcc879 100644 --- a/headers/apple.h +++ b/headers/apple.h @@ -1,6 +1,11 @@ #define MEMORY_SIZE 4096 void AppleOn(){ - //Memory = malloc(MEMORY_SIZE); + Memory = calloc(MEMORY_SIZE, sizeof(byte)); initInstructionTable(); +} + +void AppleReset(){ //Firt few Zp addresses have gibberish, need to fix + free(Memory); + Memory = calloc(MEMORY_SIZE, sizeof(byte)); }
\ No newline at end of file diff --git a/headers/debug.h b/headers/debug.h index cb34dac..4b36710 100644 --- a/headers/debug.h +++ b/headers/debug.h @@ -1,7 +1,7 @@ // debug.h // Various functions useful for use during development. -// Converts a single character to hexadecimal +// Converts a single character to hexadecimal int dCharToNum(char c){ // 0x0 - 0x9 if (c != 0x20 && (c >= 0x30 && c <= 0x39)){ @@ -19,7 +19,7 @@ int dCharToNum(char c){ } } -// Dump a particular page in memory. +// Dump page m from memory to stdout. void dPageDump(short m){ m <<= 8; for(int i = 0; i < 256; i+=16){ |