SMC Networks SMC91C95 Manuel d'utilisateur télécharger pdf (Page 76)

FIGURE 13 - TX INTR

(Assumes Auto Release Option Selected)

Write Into Packet Number

TX Status

OK?

TX INTR

Save Pkt Number Register

Read TXDONE Pkt # from

FIFO Ports Reg.

Immediately Issue "Release"

Command

Acknowledge TXINTR

Read TX INT Again

Return to ISR

NoYes

Read Status Word from RAM

Update Statistics

Re-Enable TXENA

Update Variables

TX INT = 0?

Restore Packet Number

Yes

Write Address Pointer Register

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SMC Networks SMC91C95 Manuel d'utilisateur Page 76