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microcode.mc
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microcode.mc
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%:halt {
CONST_0_OUT, OPCODE_IN
}
( From https://stackoverflow.com/a/49076303 )
( Assume 8-bit is on the stack )
( Shift A 7 bits to get the sign bit)
( Subtract the sign bit from 0 )
( ALU output now contains the high byte for A )
( We're now ready to creat our 16-bit sign-extended number )
%:sign-extend {
STACK_OUT, ALU_A_IN, ALU_LOW
CONST_7_OUT, ALU_B_IN, ALU_LOW, ALU_SHIFT, ALU_LATCH
CONST_0_OUT, ALU_A_IN, ALU_LOW
ALU_OUT, ALU_LOW, ALU_B_IN,
ALU_SUB, ALU_LATCH
ALU_OUT, ALU_A_IN, ALU_HIGH,
ALU_LOW, STACK_OUT, ALU_A_IN
}
( Fetch )
|BRK
PC_LOW, PC_OUT, RAM_ADDR_IN, RAM_ADDR_LOW
PC_HIGH, PC_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH
RAM_OUT, OPCODE_IN, PC_INC
|LIT2
%:lit2 {
PC_LOW, PC_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, STACK=1
PC_HIGH, PC_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH
RAM_OUT, PC_INC, STACK_IN, STACK=1
PC_LOW, PC_OUT, RAM_ADDR_IN, RAM_ADDR_LOW
PC_HIGH, PC_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH
RAM_OUT, PC_INC, STACK_IN, NEXT
} :lit2
|LITk
PC_LOW, PC_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, STACK=1
PC_HIGH, PC_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH
RAM_OUT, PC_INC, STACK_IN, NEXT
|LIT2k
( Same as LIT2)
:lit2
|INC
STACK_OUT, ALU_A_IN, ALU_LOW,
CONST_1_OUT, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|INC2
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH,
CONST_0_OUT, ALU_B_IN, ALU_HIGH,
CONST_1_OUT ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_OUT, ALU_HIGH, STACK_IN, STACK=1
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|INCk
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=1
CONST_1_OUT, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|INC2k
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=1
CONST_0_OUT, ALU_B_IN, ALU_HIGH, STACK=1
CONST_1_OUT ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_OUT, ALU_HIGH, STACK_IN, STACK=1
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|POP
STACK=-1, NEXT
|POP2
STACK=-1
STACK=-1, NEXT
|POPk
NEXT
|POP2k
NEXT
|DUP
%:dup {
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=1
ALU_A_OUT, STACK_IN, ALU_LOW, NEXT
} :dup
|DUP2
%:dup2 {
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=1
STACK=1
ALU_A_OUT, STACK_IN, ALU_HIGH, STACK=1
ALU_A_OUT, STACK_IN, ALU_LOW, NEXT
} :dup2
|DUPk
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=1
ALU_A_OUT, STACK_IN, ALU_LOW, STACK=1
ALU_A_OUT, STACK_IN, ALU_LOW, NEXT
|DUP2k
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=1
STACK=1
ALU_A_OUT, STACK_IN, ALU_HIGH, STACK=1
ALU_A_OUT, STACK_IN, ALU_LOW, STACK=1
ALU_A_OUT, STACK_IN, ALU_HIGH, STACK=1
ALU_A_OUT, STACK_IN, ALU_LOW, NEXT
|NIP
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_IN, ALU_A_OUT, ALU_LOW, NEXT
|NIP2
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
ALU_A_OUT, STACK_IN, ALU_LOW, STACK=-1
ALU_A_OUT, STACK_IN, ALU_HIGH, STACK=1, NEXT
|NIPk
:dup
|NIP2k
:dup2
|SWP
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW
STACK_IN, ALU_A_OUT, ALU_LOW, STACK=1
STACK_IN, ALU_B_OUT, ALU_LOW, NEXT
|SWP2
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH
STACK_IN, ALU_A_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_A_OUT, ALU_LOW, STACK=1
STACK_IN, ALU_B_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_B_OUT, ALU_LOW, NEXT
|SWPk
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=1
STACK=1
STACK_IN, ALU_A_OUT, ALU_LOW, STACK=1
STACK_IN, ALU_B_OUT, ALU_LOW, NEXT
|SWP2k
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, STACK=1
STACK=1
STACK=1
STACK=1
STACK_IN, ALU_A_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_A_OUT, ALU_LOW, STACK=1
STACK_IN, ALU_B_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_B_OUT, ALU_LOW, NEXT
|OVR
STACK=-1,
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=1,
STACK=1
STACK_IN, ALU_A_OUT, ALU_LOW, NEXT
|OVR2
STACK=-1
STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=1,
STACK=1
STACK=1
STACK=1
STACK_IN, ALU_A_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_A_OUT, ALU_LOW, NEXT
|OVRk
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=1
STACK=1
ALU_A_OUT, STACK_IN, ALU_HIGH, STACK=1
ALU_A_OUT, STACK_IN, ALU_LOW, STACK=1
ALU_A_OUT, STACK_IN, ALU_HIGH, NEXT
|OVR2k
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, STACK=1
STACK=1
STACK=1
STACK=1
STACK_IN, ALU_A_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_A_OUT, ALU_LOW, STACK=1
STACK_IN, ALU_B_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_B_OUT, ALU_LOW, STACK=1
STACK_IN, ALU_A_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_A_OUT, ALU_LOW, NEXT
|ROT
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW
STACK_IN, ALU_A_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_A_OUT, ALU_LOW, STACK=1
STACK_IN, ALU_B_OUT, ALU_LOW, NEXT
|ROT2
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
CONST_0_OUT, ALU_B_IN, ALU_LOW
CONST_0_OUT, ALU_B_IN, ALU_HIGH, ALU_ADD, ALU_LATCH ( A = z, ALU_OUT = z )
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH ( A = y, ALU_OUT = z, B = x )
STACK_IN, ALU_A_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_A_OUT, ALU_LOW, STACK=1
STACK_IN, ALU_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_OUT, ALU_LOW, STACK=1
STACK_IN, ALU_B_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_B_OUT, ALU_LOW, NEXT
|ROTk
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=1
STACK=1
STACK=1
STACK_IN, ALU_A_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_A_OUT, ALU_LOW, STACK=1
STACK_IN, ALU_B_OUT, ALU_LOW, NEXT
|ROT2k
( I think this is impossible to do in 16 instructions ;_; )
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
CONST_0_OUT, ALU_B_IN, ALU_LOW, STACK=-1
CONST_0_OUT, ALU_B_IN, ALU_HIGH, ALU_ADD, ALU_LATCH, STACK=-1 ( A = z, ALU_OUT = z )
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, STACK=1
STACK=1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=1
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=1 ( A = y, ALU_OUT = z, B = x )
STACK=1
STACK=1
STACK_IN, ALU_A_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_A_OUT, ALU_LOW, STACK=1
STACK_IN, ALU_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_OUT, ALU_LOW, STACK=1
STACK_IN, ALU_B_OUT, ALU_HIGH, STACK=1
STACK_IN, ALU_B_OUT, ALU_LOW, NEXT
( Control Flow )
|EQU
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, ALU_SUB, ALU_LATCH
CONST_1_OUT, STACK_IN
RESET_IF_ZERO
CONST_0_OUT, STACK_IN, NEXT
|EQU2
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, ALU_SUB, ALU_LATCH
CONST_1_OUT, STACK_IN
RESET_IF_ZERO
CONST_0_OUT, STACK_IN, NEXT
|EQUk
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, ALU_SUB, ALU_LATCH, STACK=1
STACK=1
CONST_1_OUT, STACK_IN
RESET_IF_ZERO
CONST_0_OUT, STACK_IN, NEXT
|EQU2k
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, ALU_SUB, ALU_LATCH, STACK=1
STACK=1
STACK=1
STACK=1
CONST_1_OUT, STACK_IN
RESET_IF_ZERO
CONST_0_OUT, STACK_IN, NEXT
|NEQ
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, ALU_SUB, ALU_LATCH
CONST_0_OUT, STACK_IN
RESET_IF_ZERO
CONST_1_OUT, STACK_IN, NEXT
|NEQ2
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, ALU_SUB, ALU_LATCH
CONST_0_OUT, STACK_IN
RESET_IF_ZERO
CONST_1_OUT, STACK_IN, NEXT
|NEQk
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, ALU_SUB, ALU_LATCH, STACK=1
STACK=1
CONST_0_OUT, STACK_IN
RESET_IF_ZERO
CONST_1_OUT, STACK_IN, NEXT
|NEQ2k
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, ALU_SUB, ALU_LATCH, STACK=1
STACK=1
STACK=1
STACK=1
CONST_0_OUT, STACK_IN
RESET_IF_ZERO
CONST_1_OUT, STACK_IN, NEXT
|GTH
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, ALU_SUB, ALU_LATCH
CONST_1_OUT, STACK_IN
RESET_IF_CARRY
CONST_0_OUT, STACK_IN, NEXT
|GTH2
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, ALU_SUB, ALU_LATCH
CONST_1_OUT, STACK_IN
RESET_IF_CARRY
CONST_0_OUT, STACK_IN, NEXT
|GTHk
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, ALU_SUB, ALU_LATCH, STACK=1
STACK=1
CONST_1_OUT, STACK_IN
RESET_IF_CARRY
CONST_0_OUT, STACK_IN, NEXT
|GTH2k
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, ALU_SUB, ALU_LATCH, STACK=1
STACK=1
STACK=1
STACK=1
CONST_1_OUT, STACK_IN
RESET_IF_CARRY
CONST_0_OUT, STACK_IN, NEXT
|LTH
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, ALU_SUB, ALU_LATCH
CONST_1_OUT, STACK_IN
RESET_IF_CARRY
CONST_0_OUT, STACK_IN, NEXT
|LTH2
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, ALU_SUB, ALU_LATCH
CONST_1_OUT, STACK_IN
RESET_IF_CARRY
CONST_0_OUT, STACK_IN, NEXT
|LTHk
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, ALU_SUB, ALU_LATCH, STACK=1
STACK=1
CONST_1_OUT, STACK_IN
RESET_IF_CARRY
CONST_0_OUT, STACK_IN, NEXT
|LTH2k
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, ALU_SUB, ALU_LATCH, STACK=1
STACK=1
STACK=1
STACK=1
CONST_1_OUT, STACK_IN
RESET_IF_CARRY
CONST_0_OUT, STACK_IN, NEXT
|JMP
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
:sign-extend
PC_OUT, PC_HIGH, ALU_B_IN, ALU_HIGH, STACK=-1
PC_OUT, PC_LOW, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_OUT, ALU_LOW, PC_IN, PC_LOW
ALU_OUT, ALU_HIGH, PC_IN, PC_HIGH, NEXT
|JMP2
STACK_OUT, PC_IN, PC_LOW, STACK=-1
STACK_OUT, PC_IN, PC_HIGH, STACK=-1
NEXT
|JMPk
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
:sign-extend
PC_OUT, PC_HIGH, ALU_B_IN, ALU_HIGH
PC_OUT, PC_LOW, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_OUT, ALU_LOW, PC_IN, PC_LOW
ALU_OUT, ALU_HIGH, PC_IN, PC_HIGH, NEXT
|JMP2k
STACK_OUT, PC_IN, PC_LOW, STACK=-1
STACK_OUT, PC_IN, PC_HIGH, STACK=1
STACK=1, NEXT
( A >> 7 )
( 0 - A >> 7 )
|JCN
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=1
CONST_0_OUT, ALU_B_IN, ALU_LOW, ALU_SUB, ALU_LATCH
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1 ( A = jump offset )
STACK=-1, RESET_IF_ZERO
CONST_7_OUT, ALU_B_IN, ALU_LOW, ALU_SHIFT, ALU_LATCH, STACK=1
CONST_0_OUT, ALU_A_IN, ALU_LOW, STACK=1
ALU_OUT, ALU_LOW, ALU_B_IN,
ALU_SUB, ALU_LATCH
ALU_OUT, ALU_A_IN, ALU_HIGH,
ALU_LOW, STACK_OUT, ALU_A_IN, STACK=-1
( A = sign-extended jump offset )
PC_OUT, PC_LOW, ALU_B_IN, ALU_LOW, STACK=-1
PC_OUT, PC_HIGH, ALU_B_IN, ALU_HIGH, ALU_ADD, ALU_LATCH
ALU_OUT, ALU_LOW, PC_IN, PC_LOW
ALU_OUT, ALU_HIGH, PC_IN, PC_HIGH, NEXT
|JCN2
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
CONST_1_OUT, ALU_B_IN, ALU_LATCH, ALU_LOW, ALU_SUB, STACK=-1
STACK=-1
RESET_IF_ZERO
STACK=1
STACK_OUT, PC_IN, PC_HIGH, STACK=1
STACK_OUT, PC_IN, PC_LOW, STACK=-1
STACK=-1, NEXT
|JCNk
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=1
CONST_0_OUT, ALU_B_IN, ALU_LOW, ALU_SUB, ALU_LATCH
STACK_OUT, ALU_A_IN, ALU_LOW, RESET_IF_ZERO ( A = jump offset )
CONST_7_OUT, ALU_B_IN, ALU_LOW, ALU_SHIFT, ALU_LATCH
CONST_0_OUT, ALU_A_IN, ALU_LOW
ALU_OUT, ALU_LOW, ALU_B_IN
ALU_SUB, ALU_LATCH
ALU_OUT, ALU_A_IN, ALU_HIGH
ALU_LOW, STACK_OUT, ALU_A_IN
( A = sign-extended jump offset )
PC_OUT, PC_LOW, ALU_B_IN, ALU_LOW
PC_OUT, PC_HIGH, ALU_B_IN, ALU_HIGH, ALU_ADD, ALU_LATCH
ALU_OUT, ALU_LOW, PC_IN, PC_LOW
ALU_OUT, ALU_HIGH, PC_IN, PC_HIGH, NEXT
|JCN2k
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
CONST_1_OUT, ALU_B_IN, ALU_LATCH, ALU_LOW, ALU_SUB, STACK=1
RESET_IF_ZERO
STACK=-1
STACK_OUT, PC_IN, PC_LOW, STACK=-1
STACK_OUT, PC_IN, PC_HIGH, STACK=1
STACK=1, NEXT
|JSR
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
:sign-extend
STACK=-1 ( TODO inline sign-extend to add this to the end )
STACK_SWAP, STACK=1
PC_OUT, PC_HIGH, ALU_B_IN, ALU_HIGH, STACK_IN, STACK_SWAP, STACK=1
PC_OUT, PC_LOW, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH, STACK_SWAP, STACK_IN
ALU_OUT, ALU_HIGH, PC_IN, PC_HIGH,
ALU_OUT, ALU_LOW, PC_IN, PC_LOW, NEXT
|JSR2
STACK_SWAP, STACK=1
STACK_SWAP, STACK_IN, PC_OUT, PC_HIGH, STACK=1
STACK_SWAP, STACK_IN, PC_OUT, PC_LOW
STACK_OUT, PC_IN, PC_LOW, STACK=-1
STACK_OUT, PC_IN, PC_HIGH, STACK=-1, NEXT
|JSRk
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
:sign-extend
STACK_SWAP, STACK=1
PC_OUT, PC_HIGH, ALU_B_IN, ALU_HIGH, STACK_IN, STACK_SWAP, STACK=1
PC_OUT, PC_LOW, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH, STACK_SWAP, STACK_IN, STACK=1
ALU_OUT, ALU_HIGH, PC_IN, PC_HIGH,
ALU_OUT, ALU_LOW, PC_IN, PC_LOW, NEXT
|JSR2k
STACK_OUT, PC_IN, PC_LOW, STACK=-1
STACK_OUT, PC_IN, PC_HIGH, STACK=1
STACK_SWAP, STACK=1
STACK_SWAP, STACK_IN, PC_OUT, PC_HIGH, STACK=1
STACK_SWAP, STACK_IN, PC_OUT, PC_LOW, NEXT
|STH
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK=1, STACK_SWAP
STACK_IN, ALU_A_OUT, ALU_LOW, STACK_SWAP, NEXT
|STH2
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK=1, STACK_SWAP
STACK_IN, ALU_A_OUT, ALU_LOW, STACK=1, STACK_SWAP
STACK_IN, ALU_A_OUT, ALU_HIGH, STACK_SWAP, NEXT
|STHk
STACK_OUT, ALU_A_IN, ALU_LOW
STACK=1, STACK_SWAP
STACK_IN, ALU_A_OUT, ALU_LOW, STACK_SWAP, NEXT
|STH2k
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=1
STACK=1, STACK_SWAP
STACK_IN, ALU_A_OUT, ALU_LOW, STACK=1, STACK_SWAP
STACK_IN, ALU_A_OUT, ALU_HIGH, STACK_SWAP, NEXT
( Memory opcodes )
( A = addr, RAM_ADDR=addr, B.h = 0, stack points to first byte )
%:load2 {
RAM_OUT, STACK_IN, STACK=1
CONST_1_OUT, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH
RAM_OUT, STACK_IN
}
|LDZ
CONST_0_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW
RAM_OUT, STACK_IN, NEXT
|LDZ2
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH, RAM_ADDR_IN, RAM_ADDR_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW, RAM_ADDR_IN, RAM_ADDR_LOW
:load2
NEXT
|LDZk
CONST_0_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, STACK=1
RAM_OUT, STACK_IN, NEXT
|LDZ2k
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH, RAM_ADDR_IN, RAM_ADDR_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW, RAM_ADDR_IN, RAM_ADDR_LOW, STACK=1
:load2
NEXT
|STZ
CONST_0_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, STACK=-1
STACK_OUT, RAM_IN, STACK=-1, NEXT
|STZ2 ( data* addr^ -- )
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_A_IN, ALU_LOW, STACK=-1
CONST_0_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_A_IN, ALU_B_IN, ALU_HIGH, STACK=-1
STACK_OUT, RAM_IN, STACK=1
CONST_1_OUT, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_OUT, ALU_LOW, RAM_ADDR_IN, RAM_ADDR_LOW
ALU_OUT, ALU_HIGH, RAM_ADDR_IN, RAM_ADDR_HIGH
STACK_OUT, RAM_IN, STACK=-1
STACK=-1, NEXT
|STZk
CONST_0_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, STACK=-1
STACK_OUT, RAM_IN, STACK=1, NEXT
|STZ2k
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_A_IN, ALU_LOW, STACK=-1
CONST_0_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_A_IN, ALU_B_IN, ALU_HIGH, STACK=-1
STACK_OUT, RAM_IN, STACK=1
CONST_1_OUT, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_OUT, ALU_LOW, RAM_ADDR_IN, RAM_ADDR_LOW
ALU_OUT, ALU_HIGH, RAM_ADDR_IN, RAM_ADDR_HIGH
STACK_OUT, RAM_IN, STACK=1, NEXT
|LDR
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW
CONST_7_OUT, ALU_B_IN, ALU_LOW, ALU_SHIFT, ALU_LATCH
CONST_0_OUT, ALU_A_IN, ALU_LOW
ALU_OUT, ALU_LOW, ALU_B_IN,
ALU_SUB, ALU_LATCH
ALU_OUT, ALU_A_IN, ALU_HIGH,
ALU_LOW, STACK_OUT, ALU_A_IN,
PC_OUT, ALU_B_IN, PC_LOW, ALU_LOW
PC_OUT, ALU_B_IN, PC_HIGH, ALU_HIGH, ALU_ADD, ALU_LATCH
( ALU_OUT = addr of byte to load )
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW, ALU_B_IN
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH, ALU_B_IN
RAM_OUT, STACK_IN, NEXT
|LDR2
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW
CONST_7_OUT, ALU_B_IN, ALU_LOW, ALU_SHIFT, ALU_LATCH
CONST_0_OUT, ALU_A_IN, ALU_LOW
ALU_OUT, ALU_LOW, ALU_B_IN,
ALU_SUB, ALU_LATCH
ALU_OUT, ALU_A_IN, ALU_HIGH,
ALU_LOW, STACK_OUT, ALU_A_IN,
PC_OUT, ALU_B_IN, PC_LOW, ALU_LOW
PC_OUT, ALU_B_IN, PC_HIGH, ALU_HIGH, ALU_ADD, ALU_LATCH
( ALU_OUT = addr of byte to load )
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW, ALU_A_IN
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH, ALU_A_IN
RAM_OUT, STACK_IN, STACK=1
CONST_0_OUT, ALU_B_IN, ALU_HIGH
CONST_1_OUT, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH
RAM_OUT, STACK_IN, NEXT
|LDRk
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW
CONST_7_OUT, ALU_B_IN, ALU_LOW, ALU_SHIFT, ALU_LATCH
CONST_0_OUT, ALU_A_IN, ALU_LOW
ALU_OUT, ALU_LOW, ALU_B_IN,
ALU_SUB, ALU_LATCH
ALU_OUT, ALU_A_IN, ALU_HIGH,
ALU_LOW, STACK_OUT, ALU_A_IN,
PC_OUT, ALU_B_IN, PC_LOW, ALU_LOW
PC_OUT, ALU_B_IN, PC_HIGH, ALU_HIGH, ALU_ADD, ALU_LATCH
( ALU_OUT = addr of byte to load )
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH, STACK=1
RAM_OUT, STACK_IN, NEXT
|LDR2k
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW
CONST_7_OUT, ALU_B_IN, ALU_LOW, ALU_SHIFT, ALU_LATCH
CONST_0_OUT, ALU_A_IN, ALU_LOW
ALU_OUT, ALU_LOW, ALU_B_IN,
ALU_SUB, ALU_LATCH
ALU_OUT, ALU_A_IN, ALU_HIGH,
ALU_LOW, STACK_OUT, ALU_A_IN,
PC_OUT, ALU_B_IN, PC_LOW, ALU_LOW
PC_OUT, ALU_B_IN, PC_HIGH, ALU_HIGH, ALU_ADD, ALU_LATCH
( ALU_OUT = addr of byte to load )
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW, ALU_B_IN
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH, ALU_B_IN, STACK=1
RAM_OUT, STACK_IN, STACK=1
CONST_0_OUT, ALU_B_IN, ALU_HIGH
CONST_1_OUT, ALU_B_IN, ALU_HIGH, ALU_ADD, ALU_LATCH
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH
RAM_OUT, STACK_IN, NEXT
|STR
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW
CONST_7_OUT, ALU_B_IN, ALU_LOW, ALU_SHIFT, ALU_LATCH
CONST_0_OUT, ALU_A_IN, ALU_LOW
ALU_OUT, ALU_LOW, ALU_B_IN,
ALU_SUB, ALU_LATCH
ALU_OUT, ALU_A_IN, ALU_HIGH,
ALU_LOW, STACK_OUT, ALU_A_IN,
PC_OUT, ALU_B_IN, PC_LOW, ALU_LOW
PC_OUT, ALU_B_IN, PC_HIGH, ALU_HIGH, ALU_ADD, ALU_LATCH
( ALU_OUT = addr of byte to load )
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW, ALU_B_IN
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH, ALU_B_IN, STACK=-1
RAM_IN, STACK_OUT, STACK=-1, NEXT
|STR2 ( data* off^ -- )
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW
CONST_7_OUT, ALU_B_IN, ALU_LOW, ALU_SHIFT, ALU_LATCH
CONST_0_OUT, ALU_A_IN, ALU_LOW
ALU_OUT, ALU_LOW, ALU_B_IN,
ALU_SUB, ALU_LATCH
ALU_OUT, ALU_A_IN, ALU_HIGH,
ALU_LOW, STACK_OUT, ALU_A_IN ( A = sign-extended offset )
PC_OUT, PC_HIGH, ALU_B_IN, ALU_HIGH, STACK=-1
PC_OUT, PC_LOW, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH, STACK=-1
ALU_OUT, RAM_ADDR_IN, ALU_LOW, RAM_ADDR_LOW, ALU_A_IN
ALU_OUT, RAM_ADDR_IN, ALU_HIGH, RAM_ADDR_HIGH, ALU_A_IN
RAM_IN, STACK_OUT, STACK=1
CONST_0_OUT, ALU_B_IN, ALU_HIGH
CONST_1_OUT, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_OUT, RAM_ADDR_IN, ALU_LOW, RAM_ADDR_LOW
ALU_OUT, RAM_ADDR_IN, ALU_HIGH, RAM_ADDR_HIGH
RAM_IN, STACK_OUT, STACK=-1
STACK=-1, NEXT
|STRk
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW
CONST_7_OUT, ALU_B_IN, ALU_LOW, ALU_SHIFT, ALU_LATCH
CONST_0_OUT, ALU_A_IN, ALU_LOW
ALU_OUT, ALU_LOW, ALU_B_IN,
ALU_SUB, ALU_LATCH
ALU_OUT, ALU_A_IN, ALU_HIGH,
ALU_LOW, STACK_OUT, ALU_A_IN,
PC_OUT, ALU_B_IN, PC_LOW, ALU_LOW
PC_OUT, ALU_B_IN, PC_HIGH, ALU_HIGH, ALU_ADD, ALU_LATCH
( ALU_OUT = addr of byte to load )
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW, ALU_B_IN
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH, ALU_B_IN, STACK=-1
RAM_IN, STACK_OUT, STACK=1, NEXT
|STR2k
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW
CONST_7_OUT, ALU_B_IN, ALU_LOW, ALU_SHIFT, ALU_LATCH
CONST_0_OUT, ALU_A_IN, ALU_LOW
ALU_OUT, ALU_LOW, ALU_B_IN,
ALU_SUB, ALU_LATCH
ALU_OUT, ALU_A_IN, ALU_HIGH,
ALU_LOW, STACK_OUT, ALU_A_IN
PC_OUT, PC_HIGH, ALU_B_IN, ALU_HIGH, STACK=-1
PC_OUT, PC_LOW, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH, STACK=-1
ALU_OUT, RAM_ADDR_IN, ALU_LOW, RAM_ADDR_LOW, ALU_A_IN
ALU_OUT, RAM_ADDR_IN, ALU_HIGH, RAM_ADDR_HIGH, ALU_A_IN
RAM_IN, STACK_OUT, STACK=1
CONST_0_OUT, ALU_B_IN, ALU_HIGH
CONST_1_OUT, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_OUT, RAM_ADDR_IN, ALU_LOW, RAM_ADDR_LOW
ALU_OUT, RAM_ADDR_IN, ALU_HIGH, RAM_ADDR_HIGH
RAM_IN, STACK_OUT, STACK=1, NEXT
|LDA
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, STACK=-1
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH
RAM_OUT, STACK_IN, NEXT
|LDA2
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_A_IN, ALU_HIGH
RAM_OUT, STACK_IN, STACK=1
CONST_1_OUT, ALU_B_IN, ALU_LOW,
CONST_0_OUT, ALU_B_IN, ALU_HIGH, ALU_ADD, ALU_LATCH
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH
RAM_OUT, STACK_IN, NEXT
|LDAk
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, STACK=-1
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, STACK=1
STACK=1
RAM_OUT, STACK_IN, NEXT
|LDA2k
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_A_IN, ALU_HIGH, STACK=1
CONST_1_OUT, ALU_B_IN, ALU_LOW, STACK=1
CONST_0_OUT, ALU_B_IN, ALU_HIGH, ALU_ADD, ALU_LATCH
RAM_OUT, STACK_IN, STACK=1
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH
RAM_OUT, STACK_IN, NEXT
|STA
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_A_IN, ALU_HIGH, STACK=-1
RAM_IN, STACK_OUT, STACK=-1, NEXT
|STA2 ( data* addr* -- )
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_A_IN, ALU_HIGH, STACK=-1
CONST_1_OUT, ALU_B_IN, ALU_LOW, STACK=-1
RAM_IN, STACK_OUT, STACK=1
CONST_0_OUT, ALU_B_IN, ALU_HIGH, ALU_ADD, ALU_LATCH
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH
RAM_IN, STACK_OUT, STACK=-1,
STACK=-1, NEXT
|STAk
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_A_IN, ALU_HIGH, STACK=-1
RAM_IN, STACK_OUT, STACK=1,
STACK=1, NEXT
|STA2k
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_A_IN, ALU_HIGH, STACK=-1
CONST_1_OUT, ALU_B_IN, ALU_LOW, STACK=-1
RAM_IN, STACK_OUT, STACK=1
CONST_0_OUT, ALU_B_IN, ALU_HIGH, ALU_ADD, ALU_LATCH
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_LOW, ALU_LOW
ALU_OUT, RAM_ADDR_IN, RAM_ADDR_HIGH, ALU_HIGH
RAM_IN, STACK_OUT, STACK=1
STACK=1, NEXT
|DEI
( STACK_OUT, DEVICE_ADDR_IN )
( STACK_IN, DEVICE_OUT, NEXT )
( TODO )
|DEO
( TODO )
STACK_OUT, DEVICE_ADDR_IN, STACK=-1
STACK_OUT, DEVICE_IN, STACK=-1, NEXT
( Arithmetic )
|ADD
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, ALU_ADD, ALU_LATCH
ALU_LOW, ALU_OUT, STACK_IN, NEXT
|ADD2
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, ALU_ADD, ALU_LATCH
ALU_OUT, ALU_HIGH, STACK_IN, STACK=1
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|ADDk
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=1
ALU_ADD, ALU_LOW, ALU_LATCH, STACK=1
ALU_OUT, STACK_IN, NEXT
|ADD2k
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, ALU_ADD, ALU_LATCH, STACK=1
STACK=1
STACK=1
STACK=1
ALU_OUT, ALU_HIGH, STACK_IN, STACK=1
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|SUB
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, ALU_SUB, ALU_LATCH
ALU_LOW, ALU_OUT, STACK_IN, NEXT
|SUB2
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, ALU_SUB, ALU_LATCH
ALU_OUT, ALU_HIGH, STACK_IN, STACK=1
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|SUBk
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=1
ALU_SUB, ALU_LOW, ALU_LATCH, STACK=1
ALU_OUT, STACK_IN, NEXT
|SUB2k
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, ALU_SUB, ALU_LATCH, STACK=1
STACK=1
STACK=1
STACK=1
ALU_OUT, ALU_HIGH, STACK_IN, STACK=1
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|MUL
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, ALU_MUL, ALU_LATCH,
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|MUL2
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, ALU_MUL, ALU_LATCH
ALU_OUT, ALU_HIGH, STACK_IN, STACK=1
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|MULk
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=1
ALU_MUL, ALU_LOW, ALU_LATCH, STACK=1
ALU_OUT, STACK_IN, NEXT
|MUL2k
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, ALU_MUL, ALU_LATCH, STACK=1
STACK=1
STACK=1
STACK=1
ALU_OUT, ALU_HIGH, STACK_IN, STACK=1
ALU_OUT, ALU_LOW, STACK_IN, NEXT
( TODO: Div will NOP for several cycles to let the hardware divider work )
|DIV
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, ALU_DIV, ALU_LATCH,
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|DIV2
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, ALU_DIV, ALU_LATCH
ALU_OUT, ALU_HIGH, STACK_IN, STACK=1
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|DIVk
CONST_0_OUT, ALU_A_IN, ALU_B_IN, ALU_HIGH
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=1
ALU_DIV, ALU_LOW, ALU_LATCH, STACK=1
ALU_OUT, STACK_IN, NEXT
|DIV2k
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, ALU_DIV, ALU_LATCH, STACK=1
STACK=1
STACK=1
STACK=1
ALU_OUT, ALU_HIGH, STACK_IN, STACK=1
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|AND
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, ALU_AND, ALU_LATCH,
ALU_OUT, ALU_LOW, STACK_IN, NEXT
|AND2
STACK_OUT, ALU_A_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_A_IN, ALU_HIGH, STACK=-1
STACK_OUT, ALU_B_IN, ALU_LOW, STACK=-1
STACK_OUT, ALU_B_IN, ALU_HIGH, ALU_AND, ALU_LATCH
ALU_OUT, ALU_HIGH, STACK_IN, STACK=1
ALU_OUT, ALU_LOW, STACK_IN, NEXT