2.10
Se rial In ter face
The EBC-LP pro vides four 16550 com pati ble RS- 232 se rial ports at the fol low ing ad dresses :
COM1 3F8H at IRQ 4 (PnP Device)
COM2 2F8H at IRQ 3 (PnP Device)
COM3 3E8H* at IRQ 5**
COM4 2E8H* at IRQ 9**
*COM ports 3 and 4 can be en abled or dis abled in di vidu ally via the jumper block at J21. When J 21
pins 1-2 are jumpered, COM3 is en abled. When J21 pins 3-4 are jumpered, COM4 is en abled.
**The in ter rupts are not dis con nected when COM3 or COM4 are dis abled. Use the in ter rupt
rout ing block J17 de scribed ear lier to dis con nect the de fault in ter rupts if de sired.
Page 2-6
EBC-LP OPERATIONS MANUAL
030530
WinSystems
- "The Embedded Authority"
3
o o
1
4
o o
2
J21
U25
U24
U26
1
o
2
o
3
o
J11
o o o
3 2 1
J12
U28
U30
U29
1
o
2
o
3
o
J13
o o o
3 2 1
J14
Summary of Contents for EBC-LP
Page 68: ...APPENDIX C Mechanical Drawing...
Page 69: ......
Page 70: ......
Page 71: ...APPENDIX D WS16C48 I O Routines and Sample Program Listings...
