Birch BCP-760, Operation Manual

Page: 4 / 31

BCP-760
Operation Guide Page 4 of 31
1.2.1 Keypad Subsystem
The keypad subsystem scans the key matrix, converts the scan code to its associated key value and stores the
value in the keyboard input buffer for program utilization. The table below shows hexadecimal values assigned
to each key.
KEY VALUE KEY VALUE KEY VALUE KEY VALUE KEY VALUE
CLR 08H - 2DH = 3DH M 4DH Y 59H
ENTER 0DH
.
2EH
?
3FH
N
4EH
Z
5AH

10H / 2FH @ 40H O 4FH [ 5BH

11H 0 30H A 41H P 50H \ 5CH
↓
12H 1 31H B 42H Q 51H ] 5DH
↑
13H 2 32H C 43H R 52H F1 86H
SP 20H 3 33H D 44H S 53H F2 87H
! 21H 4 34H E 45H T 54H F3 88H
# 23H 5 35H F 46H U 55H F4 89H
$ 24H 6 36H G 47H V 56H F5 8AH
% 25H 7 37H H 48H W 57H F6 8BH
& 26H 8 38H I 49H X 58H F7 8CH
* 2AH 9 39H J 4AH Y 59H F8 8DH
+ 2BH : 3AH K 4BH Z 5AH EXIT 84H
, 2CH ; 3BH L 4CH [ 5BH
1.2.2 Display Subsystem
The BCP-760 display subsystem supports a character oriented 8-line by 20-character or 4-line by 16-
character LCD display. The origin (0,0) is always at the top-left hand corner. This subsystem provides the
program interface functions to display characters, set cursor position, get cursor position and clear screen
display.
1.1.1 Serial Port Subsystem
The BCP-760 terminal has an RS-232 serial port for data communication. The communication subsystem
consists of point-to-point protocol for general processing. The BCP-760 also supports a built-in Kermit server
for point-to-point communication.
1.1.2 Real Time Clock Subsystem
This subsystem allows users to set and obtain system date and time from the Real Time Clock Integrated
Circuit (IC) in the BCP-760.
1.1.3 Bar Code Input Port
The BCP-760 has a built-in barcode decoder. The terminal reads bar code labels through an integrated laser
scanner module or CCD module.
1.3 Diagnostics and Power - On - Test
The system diagnostic routines exercise the ROM validity check, test the RAM, system parameters, the keypad,
the real time clock, the RS-232 port, LCD and scanner port. The power-on-test is a subset of the system
diagnosis that only includes the ROM validity check, system parameter check sum test, and back-up battery
level check.