DCL(4) BSD Programmer's Manual (HP300 Architecture) DCL(4)
d
\bdc
\bcl
\bl - HP 98628A communications link
S
\bSY
\bYN
\bNO
\bOP
\bPS
\bSI
\bIS
\bS
d
\bde
\bev
\bvi
\bic
\bce
\be d
\bdc
\bcl
\bl0
\b0 a
\bat
\bt s
\bsc
\bco
\bod
\bde
\be?
\b? f
\bfl
\bla
\bag
\bgs
\bs 0
\b0x
\bx1
\b1
D
\bDE
\bES
\bSC
\bCR
\bRI
\bIP
\bPT
\bTI
\bIO
\bON
\bN
The 98628A is a buffered EIA RS-232C (CCITT V.28) communications inter-
face. It has one port with full modem control.
Input and output for each line may set to one of following baud rates; 0,
50, 75, 110, 134.5, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600,
An optional argument _
\bf_
\bl_
\ba_
\bg_
\bs may be set to 1 if the line should be treated
as hard-wired with carrier always present, or to 0 if modem control is
Use HP cable "98626 & 98628 opts.002, RS232-C DCE CABLE, 5061-4216" to
attach non-modem devices. Use HP cable "98626 & 98628 opts.001, RS232-C
DTE CABLE, 5061-4215" to attach modems.
The 98628A has a 256 byte input silo and a 256 output silo. Input inter-
rupts happen on a per character basis.
The high water and low water marks in the kernel tty routines are com-
pletely inappropriate for a device like this with a large input buffer.
Don't use tandem mode if possible. A fast system can handle input at
19.2K baud without receive overflow.
For output to devices that make heavy use of XON/XOFF a write size of
less then 256 will improve performance marginally.
D
\bDI
\bIA
\bAG
\bGN
\bNO
\bOS
\bST
\bTI
\bIC
\bCS
\bS
d
\bdc
\bcl
\bl%
\b%d
\bd:
\b: e
\ber
\brr
\bro
\bor
\br 0
\b0x
\bx%
\b%x
\bx R
\bRE
\bES
\bSE
\bET
\bT C
\bCA
\bAR
\bRD
\bD.
\b. Where the errors are encoded:
0x0d uart receive overflow
0x0f missing external clock
0x13 connection not established
0x19 illegal databits/parity
0x1a register address out of range
0x1b register value out of range
S
\bSE
\bEE
\bE A
\bAL
\bLS
\bSO
\bO
Breaks received at a faster rate then 1 break every second will be recog-
Console use is not supported.
The RS-422/423/499, MTS-DSN/DL modes of the card are not supported.