; hence core lib

core:
  .define NULL, 0x0000
  .define VOID, NULL

  .define FALSE, NULL
  .define TRUE, 0x0001

  .define CORE_U8_MAX, 0x00ff
  .define CORE_U16_MAX, 0xffff
  
  .define CORE_KB, 1024

  core_mem:
    .define CORE_MEM_PRG, (0 * CORE_KB)
    .define CORE_MEM_ST,  (32 * CORE_KB)
    .define CORE_MEM_MEM, (40 * CORE_KB)
    .define CORE_MEM_OUT, (56 * CORE_KB)
    .define CORE_MEM_CHR, (56 * CORE_KB + 1)
    .define CORE_MEM_KEY, (56 * CORE_KB + 2)

  core_reg:
    .define CORE_REG_PC,  0x0
    .define CORE_REG_OPC, 0x1
    .define CORE_REG_ARG, 0x2
    .define CORE_REG_S,   0x3
    .define CORE_REG_SP,  0x4
    .define CORE_REG_A,   0x5
    .define CORE_REG_B,   0x6
    .define CORE_REG_C,   0x7
    .define CORE_REG_D,   0x8

  core_alu:
    .define CORE_ALU_NOT,   0x00
    .define CORE_ALU_AND,   0x01
    .define CORE_ALU_OR,    0x02
    .define CORE_ALU_XOR,   0x03
    .define CORE_ALU_LSH,   0x04
    .define CORE_ALU_RSH,   0x05
    .define CORE_ALU_ADD,   0x06
    .define CORE_ALU_SUB,   0x07
    .define CORE_ALU_MUL,   0x08
    .define CORE_ALU_DIV,   0x09
    .define CORE_ALU_CMP,   0x0a
    .define CORE_ALU_EQ,    0x0b
    .define CORE_ALU_LT,    0x0c
    .define CORE_ALU_GT,    0x0d
    .define CORE_ALU_LEQ,   0x0e
    .define CORE_ALU_GEQ,   0x0f
    .define CORE_ALU_BOL,   0x10
    .define CORE_ALU_INV,   0x11
    .define CORE_ALU_RND,   0x12