PC87366 datasheet(158/240 Pages) NSC

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9.0 Game Port (GMP) (Continued)

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9.3

GAME PORT REGISTERS

The following abbreviations are used to indicate the Register Type:

R/W = Read/Write

R = Read from a speciﬁc address returns the value of a speciﬁc register. Write to the same address is to a different

W=Write

RO = Read Only

R/W1C = Read/Write 1 to Clear. Writing 1 to a bit clears it to 0. Writing 0 has no effect.

9.3.1

Game Port Register Map

The following table lists the Game Port registers. for the Game Port register bitmap, see Section 9.4.

Offset

Mnemonic

Type

Section

00h

GMPCTL Game Port Control

R/W

9.3.2

01h

GMPLST

Game Port Legacy Status

9.3.3

02h

GMPXST Game Port Extended Status

R/W1C

9.3.4

03h

GMPIEN

Game Port Interrupt Enable

R/W

9.3.5

04h

GMPAXL

Game Device A X Position Low Byte

9.3.6

05h

GMPAXH Game Device A X Position High Byte

9.3.7

06h

GMPAYL

Game Device A Y Position Low Byte

9.3.8

07h

GMPAYH

Game Device A Y Position High Byte

9.3.9

08h

GMPBXL Game Device B X Position Low Byte

9.3.10

09h

GMPBXH Game Device B X Position High Byte

9.3.11

0Ah

GMPBYL Game Device B Y Position Low Byte

9.3.12

0Bh

GMPBYH Game Device B Y Position High Byte

9.3.13

0Ch

GMPEPOL Game Port Event Polarity

R/W

9.3.14

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