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Adding an immediate mode version of BRK since the IRQ will treat it as a two byte instruction

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Carl-Henrik Skårstedt 2019-11-03 20:34:02 -08:00
parent 155480f71b
commit 0a31631946
1 changed files with 2 additions and 1 deletions
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3
x65.cpp
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@ -403,6 +403,7 @@ enum AddrMode {
AMM_IMM_DBL_XY = 1<<AMB_IMM_DBL_XY,
// instruction group specific masks
AMM_BRK = AMM_NON | AMM_IMM,
AMM_BRA = AMM_BRANCH | AMM_ABS,
AMM_ORA = AMM_IMM | AMM_ZP | AMM_ZP_X | AMM_ABS | AMM_ABS_Y | AMM_ABS_X | AMM_ZP_REL_X | AMM_ZP_Y_REL,
AMM_STA = AMM_ZP | AMM_ZP_X | AMM_ABS | AMM_ABS_Y | AMM_ABS_X | AMM_ZP_REL_X | AMM_ZP_Y_REL,
@ -462,7 +463,7 @@ struct mnem {
struct mnem opcodes_6502[] = {
// nam modes (zp,x) zp # $0000 (zp),y zp,x abs,y abs,x (xx) A empty
{ "brk", AMM_NON, { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } },
{ "brk", AMM_BRK, { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } },
{ "jsr", AMM_ABS, { 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } },
{ "rti", AMM_NON, { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40 } },
{ "rts", AMM_NON, { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x60 } },