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cleaning code

This commit is contained in:
Thiago Auler 2017-11-13 01:26:29 -02:00
parent 260e07b59b
commit 2cb3f865a8
1 changed files with 6 additions and 26 deletions
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32
src/6502.c
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@ -2,8 +2,8 @@
#include "inc/memory.h"
#include "inc/opcodes.h"
ocl opcode_decoded_1;
oct opcode_decoded_2;
ocl opcode_in_list;
oct opcode_in_table;
void init()
{
@ -29,8 +29,8 @@ void decode()
db aaacc = (aaa << 2) | cc;
opcode_decoded_1 = ir;
opcode_decoded_2 = aaacc;
opcode_in_list = ir;
opcode_in_table = aaacc;
address_mode = bbb;
@ -60,31 +60,11 @@ void decode()
address_mode = absolute_y;
}
}
// disable all incorrect opcodes
if (((ir & 0x0F) == 0x02 && ir != 0xA2) ||
(ir & 0x0F) == 0x03 || (ir & 0x0F) == 0x07 ||
(ir & 0x0F) == 0x0B || (ir & 0x0F) == 0x0F)
{
opcode_decoded_1 = XXX;
opcode_decoded_2 = XXX;
address_mode = XXX;
}
if (ir == 0x04 || ir == 0x0C || ir == 0x14 || ir == 0x1A || ir == 0x1C || ir == 0x34 || ir == 0x3A ||
ir == 0x3C || ir == 0x44 || ir == 0x54 || ir == 0x5A || ir == 0x5C || ir == 0x64 || ir == 0x74 ||
ir == 0x7A || ir == 0x7C || ir == 0x80 || ir == 0x89 || ir == 0x9C || ir == 0x9E ||
ir == 0xD4 || ir == 0xDA || ir == 0xDC || ir == 0xF4 || ir == 0xFA || ir == 0xFC)
{
opcode_decoded_1 = XXX;
opcode_decoded_2 = XXX;
address_mode = XXX;
}
}
void execute()
{
switch (opcode_decoded_1)
switch (opcode_in_list)
{
case BCC: return bcc();
case BCS: return bcs();
@ -123,7 +103,7 @@ void execute()
case XXX: return xxx();
}
switch (opcode_decoded_2)
switch (opcode_in_table)
{
case ADC: return adc();
case AND: return and();