SMC Networks SMC91C95 - Manual (Page 77)

77
FIGURE 14 - TXEMPTY INTR
T X E M P T Y I N T R
Write Acknowledge Reg. with
T X E M P T Y B i t S e t
R e a d T X E M P T Y & T X I N T R
A c k n o w l e d g e T X I N T R
R e - E n a b l e T X E N A
R e t u r n t o I S R
I s s u e " R e l e a s e " C o m m a n d
Restore Packet Number
T X E M P T Y = 0
&
T X I N T = 0
(Waiting for Completion)
T X E M P T Y = X
&
T X I N T = 1
(Transmission Failed)
T X E M P T Y = 1
&
T X I N T = 0
(Everything went through
successfully)
Read Pkt. # Register & Save
Write Address Pointer
Register
R e a d S t a t u s W o r d f r o m R A M
Update Statistics
Update Variables