IP

[fpgaboy.git] / opcodes

diff --git a/opcodes b/opcodes
index 6a54b02f6794abaf3082b92e9a0a29809ad51043..8aa627ef1282f814625c09ad3eed15de3325490b 100644 (file)
--- a/opcodes
+++ b/opcodes
@@ -7,20 +7,10 @@ imm16 = 16-bit immediate value
 8m8   = 8-bit value at the 8-bit address (the 16-bit equivalent is 0xFF00 + addr)
 
 bits         insn                 notes
 8m8   = 8-bit value at the 8-bit address (the 16-bit equivalent is 0xFF00 + addr)
 
 bits         insn                 notes

-0000 0010    LD    (BC), A

 0000 1000    LD    16m16,SP      loads SP
 0000 1000    LD    16m16,SP      loads SP

-0000 1001    ADD   HL,   BC
-0000 1010    LD    A,    (BC) 

 0001 0000    STOP
 0001 0000    STOP

-0001 0010    LD    (DE), A
-0001 1001    ADD   HL,   DE
-0001 1010    LD    A,    (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

 
 *****************************
 
 
 *****************************
 


@@ -99,15 +89,6 @@ bits                   insn               notes
 1100 1011 0011 0110    SWAP  (HL)
 1100 1011 0011 0111    SWAP  A
 
 1100 1011 0011 0110    SWAP  (HL)
 1100 1011 0011 0111    SWAP  A
 

-1100 1011 0100 0000    BIT   imm3, B      test bit specified by imm3
-1100 1011 0100 0001    BIT   imm3, C
-1100 1011 0100 0010    BIT   imm3, D
-1100 1011 0100 0011    BIT   imm3, E
-1100 1011 0100 0100    BIT   imm3, H
-1100 1011 0100 0101    BIT   imm3, L
-1100 1011 0100 0110    BIT   imm3, (HL)
-1100 1011 0100 0111    BIT   imm3, A
-

 1100 1011 1000 0000    RES   imm3, B      reset bit specified by imm3
 1100 1011 1000 0001    RES   imm3, C
 1100 1011 1000 0010    RES   imm3, D
 1100 1011 1000 0000    RES   imm3, B      reset bit specified by imm3
 1100 1011 1000 0001    RES   imm3, C
 1100 1011 1000 0010    RES   imm3, D