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Drive option information, Dma assignments, Hardware interrupts – Epson 4S User Manual

Page 6: Epson el 4s/33

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Epson EL 4S/33+

Drive Option Information

Standard diskette drive specifications

DMA Assignments

Level
DMA0
DMA1

DMA3

DMA6

DMA7

Assigned device

Reserved (8-bit)
Reserved (8-bit)
FDD controller (8-bit)

Reserved

(8-bit)

Cascade for DMA controller 1
Reserved (16-bit)
Reserved (16-bit)
Reserved (16-bit)

Hardware Interrupts

IRQ no.

Function

lRQ0

Timer output

IRQ1

Keyboard

IRQ2

Cascade from IRQ controller 2

IRQ3

Serial port 2

IRQ4

Serial port 1

IRQ5

Parallel port 2

IRQ6

FDD controller

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