S49 - Buffer Low Limit

Description
This Sregister (with S50 - Buffer High Limit) sets the number of characters which are buffered in Automatic Speed Buffering (ASB) and error-control modes before the DTE is flow-controlled. When the number of characters in the buffer reaches the value set by this register, the DTE is flowed on.

If the value of S49 is larger than the value of S50, then the values are interchanged during the next handshake. If the value of S49 equals the value of S50, then the value of S49 is reduced by one during the next handshake.

Type
value

Value range
1 to 249, Default value: 64

Stored by &Wn
yes

Displayed by &V
yes

Cross Reference
&Q5 Error Control Mode

&Q6 Automatic Speed Buffering Mode

S36 Negotiation Fallback

Options, S50 ASB: High Limit

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