NCR RealPOS 70, User Manual

Page: 245 / 306

Chapter 12: Cash Drawer Interface 12-5
2. Use the arming bit at address m_nIOPort to enable an external
driving circuit, set the solenoid bit high, set the solenoid low
after the charge time and finally disable the arming bit.
QueryConf():
QueryConf() uses the PCI configuration cycle protocol at Bus
0, Device 31 and Function 0 and offset 0x58 to obtain the
contents of GPIOBase register. When GPIOBase is referenced
in the following paragraphs it is referring to the contents of
register GPIOBase [15:6] . The primary differences are:
a. One port address needs to be configured for reading the
status bit and reading/writing to control the cash
drawer solenoids, and if necessary the ARM bit using
register GPIO Level for Input or Output 2 Register
(GP_LVL2) offset GPIOBase + 0x38.
b. GPIO must be selected for use as GPIO through register
GPIO Use Select 2 Register (GPIO_USE_SEL2) offset
GPIOBase + 0x30.
c. GPIO bits used by the cash drawer must be selected as
either input or output through GPIO Input/Output
Select 2 Register(GP_IO_SEL2) GPIOBase + offset 0x34.
d. An ARM bit may need to be setup as output and
controlled with the solenoid and status port address.
This bit enables the driving circuit for the solenoid
outputs.