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Last active December 3, 2019 10:43
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16-bit assembly information for contributing ReC98 Project
Raw
ASM4Newbies.md

Registers

  • ax, bx, cx, dx general purpose registers (16 bits)

ah: 8bit from front (a-HIGH)
al: 8bit from back (a-LOW)

  • ip, sp, bp ip: instruction pointer
    sp, bp: stack stuff. get it?

  • si, di string copy:
    source to destination.

  • shl, shr: shift SHift Left

Raw
ReC98.md

Macros

Rec98 Specific

  • nopcall: LDATA found? nop else call func (PC-98 compatibilities)
  • setfarfp: "Avoids specifying both segment and offset of a function."
  • pushSS_: push stack segment (ss)
  • pushCX_: push cx register
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