; The instruction set, as the assembler needs to see it.
;
; A SECOND COPY, and it is worth saying why rather than hoping nobody notices. The monitor
; has one of these in cosmos.asm, and the assembler cannot use it: the monitor's copy lives
; in the system's data at an address that moves every time CosmOS is rebuilt, and there is
; no linker to reach it by name. So the assembler carries its own 448 bytes. That is the
; cost of having no libraries, paid where it is cheapest to pay.
;
; Both copies are generated by Tests/instructiontable.py from the C assembler's own list,
; and Tests/docs.sh checks both against it. Neither can drift without the suite saying so.
;
; Seven bytes an entry: the opcode, the shape, and four characters of name with the zero
; the assembler puts after a string. Every mnemonic is four characters or fewer, so a name
; padded to four is an exact match rather than a prefix.
;
; It goes in the DATA Segment, because the assembler has to read it and an instruction can
; only read Data Memory. A table in Program Memory could not be reached by the program
; holding it, except through the memory controller.

#Data

; How many bytes an instruction of each shape runs to, the opcode included. The assembler
; does not use this to size a token - the operand that follows is a token of its own and
; carries its own length - but it is what says an instruction is well formed.
AsmShapeLength:
  0d1 0d3 0d2 0d2 0d3 0d4 0d3

; How many Data Pointer selectors an instruction of each shape names. This is what the
; assembler needs: a selector is part of the mnemonic rather than a token after it, so it
; is the one thing about an instruction's length that is not settled by the opcode alone.
;
;   0  no operand           4  a selector and a byte
;   1  an address           5  a selector and an address, which is SETD
;   2  a byte               6  two selectors, which is LDD and STD
;   3  a selector
AsmShapeSelectors:
  0d0 0d0 0d0 0d1 0d1 0d1 0d2

AsmInstructionCount:
  0d70

AsmInstructions:
  0x00 0d0 "ADD "
  0x01 0d0 "SUB "
  0x02 0d0 "AND "
  0x03 0d0 "OR  "
  0x04 0d0 "XOR "
  0x05 0d0 "NOTA"
  0x06 0d0 "NOTB"
  0x07 0d0 "SHL "
  0x08 0d0 "SHR "
  0x10 0d1 "BRI "
  0x11 0d1 "BRQ "
  0x12 0d1 "BRA "
  0x13 0d1 "BRB "
  0x14 0d1 "BRC "
  0x15 0d3 "BRD "
  0x1A 0d1 "BNQ "
  0x1B 0d1 "BNA "
  0x1C 0d1 "BNB "
  0x1D 0d1 "BNC "
  0x16 0d1 "RCAL"
  0x17 0d1 "CALL"
  0x18 0d2 "SWI "
  0x19 0d0 "RETI"
  0x1E 0d0 "RRET"
  0x1F 0d0 "RET "
  0x20 0d0 "RSTA"
  0x21 0d0 "RSTB"
  0x22 0d0 "INCA"
  0x23 0d0 "INCB"
  0x24 0d0 "DECA"
  0x25 0d0 "DECB"
  0x26 0d2 "INIA"
  0x27 0d2 "INIB"
  0x28 0d0 "CCF "
  0x29 0d0 "MVQA"
  0x2A 0d0 "MVQB"
  0x2B 0d0 "SIF "
  0x2C 0d0 "CIF "
  0x30 0d0 "PSHQ"
  0x31 0d0 "PSHA"
  0x32 0d0 "PSHB"
  0x33 0d3 "PSHD"
  0x34 0d0 "POPA"
  0x35 0d0 "POPB"
  0x36 0d3 "POPD"
  0x40 0d3 "INCD"
  0x41 0d3 "DECD"
  0x42 0d3 "LDA "
  0x43 0d3 "LDB "
  0x44 0d3 "STQ "
  0x45 0d3 "STA "
  0x46 0d3 "STB "
  0x47 0d5 "SETD"
  0x48 0d4 "DPUP"
  0x49 0d4 "DPDN"
  0x4A 0d6 "LDD "
  0x4B 0d6 "STD "
  0x4C 0d3 "MVSD"
  0x4D 0d3 "MVDS"
  0x4E 0d3 "DPUA"
  0x4F 0d3 "DPDA"
  0x50 0d3 "DPUW"
  0x51 0d3 "DPDW"
  0xD0 0d2 "OUTQ"
  0xD1 0d2 "OUTA"
  0xD2 0d2 "OUTB"
  0xE0 0d2 "INA "
  0xE1 0d2 "INB "
  0xF0 0d0 "NOP "
  0xFF 0d0 "HALT"