From 155c200400ac80be1113e35df6637e2f77296d1a Mon Sep 17 00:00:00 2001 From: James Barnett Date: Fri, 22 Jun 2018 19:51:31 +0100 Subject: Add first few 16-Bit Load ops --- src/main/kotlin/cpu/opcodes/Loads16Bit.kt | 40 +++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 src/main/kotlin/cpu/opcodes/Loads16Bit.kt (limited to 'src/main/kotlin/cpu/opcodes') diff --git a/src/main/kotlin/cpu/opcodes/Loads16Bit.kt b/src/main/kotlin/cpu/opcodes/Loads16Bit.kt new file mode 100644 index 0000000..6c915cf --- /dev/null +++ b/src/main/kotlin/cpu/opcodes/Loads16Bit.kt @@ -0,0 +1,40 @@ +package cpu.opcodes + +import cpu.Operation +import BitManipulation as bm + +// 8-Bit Loads +var loads16Bit = mapOf( + + 0x01 to Operation("LD BC,nn", 2, 12, {r, _, a -> r.BC = bm.argsToWord(a)}), + 0x11 to Operation("LD DE,nn", 2, 12, {r, _, a -> r.DE = bm.argsToWord(a)}), + 0x21 to Operation("LD HL,nn", 2, 12, {r, _, a -> r.HL = bm.argsToWord(a)}), + 0x31 to Operation("LD SP,nn", 2, 12, {r, _, a -> r.SP = bm.argsToWord(a)}), + + 0xF9 to Operation("LD SP,HL", 0, 8, {r, _, _ -> r.SP = r.HL}), + + 0xF8 to Operation("LDHL SP,n", 1, 12, {r, _, a -> r.HL = (r.SP + a[0])}), // TODO - not sure what the flags should be here + 0x08 to Operation("LD (nn),SP", 2, 20, {r, m, a -> + m.writeByte(bm.argsToWord(a), bm.getLsb(r.SP)) + m.writeByte(bm.argsToWord(a) + 1, bm.getMsb(r.SP)) + // TODO - not sure if the lsb/msb order is right here + }), + + 0xF5 to Operation("PUSH AF", 0, 16, {r, m, _ -> + m.writeByte(r.decrementAndGetSP(), bm.getMsb(r.AF)) + m.writeByte(r.decrementAndGetSP(), bm.getLsb(r.AF)) + }), + 0xC5 to Operation("PUSH BC", 0, 16, {r, m, _ -> + m.writeByte(r.decrementAndGetSP(), bm.getMsb(r.BC)) + m.writeByte(r.decrementAndGetSP(), bm.getLsb(r.BC)) + }), + 0xD5 to Operation("PUSH DE", 0, 16, {r, m, _ -> + m.writeByte(r.decrementAndGetSP(), bm.getMsb(r.DE)) + m.writeByte(r.decrementAndGetSP(), bm.getLsb(r.DE)) + }), + 0xE5 to Operation("PUSH HL", 0, 16, {r, m, _ -> + m.writeByte(r.decrementAndGetSP(), bm.getMsb(r.HL)) + m.writeByte(r.decrementAndGetSP(), bm.getLsb(r.HL)) + }) + +) -- cgit v1.2.3