Arreglo de Registros Internos
Andrade Hernández, Efraín
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The Central Processing Unit (CPU, for its acronym in English) has 14 internal registers each 16 bits. The first four, AX, BX, CX and DX are general purpose and can also be used as 8-bit registers. That is, AX can be divided into AH and AL (AH is the high byte, high, and AL is the low byte, low) The same applies to the other three (BH and BL BX, CX and CL and CH DX DH and DL).