RAM needs to be writable, I guess

[fpgaboy.git] / opcodes

diff --git a/opcodes b/opcodes
index 09f68fbce78aa2756211461a9e610ad3ede999ba..8aa627ef1282f814625c09ad3eed15de3325490b 100644 (file)
--- a/opcodes
+++ b/opcodes
@@ -8,15 +8,9 @@ imm16 = 16-bit immediate value
 
 bits         insn                 notes
 0000 1000    LD    16m16,SP      loads SP
 
 bits         insn                 notes
 0000 1000    LD    16m16,SP      loads SP

-0000 1001    ADD   HL,   BC

 0001 0000    STOP
 0001 0000    STOP

-0001 1001    ADD   HL,   DE
-0010 1001    ADD   HL,   HL
-0011 1001    ADD   HL,   SP

 0111 0110    HALT                 Danger! Helvetica!
 1100 1011    -     -     -        see two-byte opcodes below
 0111 0110    HALT                 Danger! Helvetica!
 1100 1011    -     -     -        see two-byte opcodes below

-1110 1000    ADD   SP,   imm8
-1111 1000    LDHL  SP,   imm8     load SP+n (signed n) into HL

 
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