Electronic specifications

Address

Resource

 

 

0050h - 0053h

Programmable Timers

 

 

0054h - 005Fh

 

 

 

0060h, 0064h

Keyboard Controller

 

 

0061h

NMI Status and Control Register

 

 

0063h

NMI Status and Control Register

 

 

0065h

NMI Status and Control Register

 

 

0067h

NMI Status and Control Register

 

 

0070h

NMI Mask (bit 7) and RTC Address (bits 6::0)

 

 

0072h

NMI Mask (bit 7) and RTC Address (bits 6::0)

 

 

0074h

NMI Mask (bit 7) and RTC Address (bits 6::0)

 

 

0076h

NMI Mask (bit 7) and RTC Address (bits 6::0)

 

 

0071h

RTC Data

 

 

0073h

RTC Data

 

 

0075h

RTC Data

 

 

0077h

RTC Data

 

 

0080h - 008Fh

DMA Low Page Register

 

 

0090h - 0091h

DMA Low Page Register

 

 

0092h

System Control Port A (PC-AT control Port)

 

 

0093h - 009Fh

DMA Low Page Register

 

 

0094h

Video Display Controller

 

 

00A0h - 00A1h

Interrupt Controller 2

 

 

00A4h - 00A15

Interrupt Controller 2

 

 

00A8h - 00A19

Interrupt Controller 2

 

 

00Ach - 00Adh

Interrupt Controller 2

 

 

00B0h - 00B1h

Interrupt Controller 2

 

 

00B2h

Advanced Power Management Control

 

 

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