PC87363 datasheet(157/200 Pages) NSC

157 / 200 page

9.0 Game Port (GMP) (Continued)

157

www.national.com

9.3.5

Game Port Interrupt Enable Register (GMPIEN)

This register defines the conditions on which the Game Port asserts its interrupt request signal.

This register is functional only in Enhanced mode.

Location:

Offset 03h

Type:

R/W

Bit

76543210

Name

Device B

Button 1

IRQ Enable

Device B

Button 0

IRQ Enable

Device A

Button 1

IRQ Enable

Device A

Button 0

IRQ Enable

Reserved

Position

IRQ Event

Deﬁnition

Device B

Position

IRQ Enable

Device A

Position

IRQ Enable

Reset

00000000

Bit

Description

Device B Button 1 IRQ Enable. When set to 1, the Game Port issues an interrupt request in response to an

event triggered by Button 1 of Device B. When set to 0, Button 1 of Device B cannot cause interrupt requests to

be issued.

0: Disabled (default)

1: Enabled

Device B Button 0 IRQ Enable. Same as bit 7 of this register, but for Device B Button 0.

0: Disabled (default)

1: Enabled

Device A Button 1 IRQ Enable. Same as bit 7 of this register, but for Device A Button 1.

0: Disabled (default)

1: Enabled

Device A Button 0 IRQ Enable. Same as bit 7 of this register, but for Device A Button 0.

0: Disabled (default)

1: Enabled

Reserved

Position IRQ Event Deﬁnition Deﬁnes the event on which the position IRQ is asserted for both game devices.

0: Both X-Position Counter and Y-Position Counter are ready

1: Either X-Position Counter or Y-Position Counter is ready

Device B Position IRQ Enable. When set to 1, the Game Port issues an interrupt request when the position

reading of Device B is completed and the position counters can be read. When set to 0, no interrupt request is

issued in response to any change in the status of Device B position counters.

0: Disabled (default)

1: Enabled

Device A Position IRQ Enable. Same as bit 2 of this register, but for Device A.

0: Disabled (default)

1: Enabled

PC87363 Datasheet(PDF) 157 Page - National Semiconductor (TI)

PC87363 Datasheet(HTML) 157 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL