Technical data

Linkage with PLC
146 VIPA GmbH CP486 ⋅ 00/14
6.4.2 Driver Functions via Software Interrupt
6.4.2.1 CP-Status Call
This function outputs various arbitrary status information via the CP486. Moreover, it can be used
by the applications software to check whether the CP486 software driver is loaded. Further
information returned is the output status of hard and software, CPU identification etc.
Register
IN
high
OUT
low
AX $00 $C386
BX VGA-Bios Bios
CX CP CPU
DX CP-Status PC-Status
AX C386 hex code for CP software is loaded
BH output status of CP486 VGA-BIOS
BL output status of CP486-BIOS
CH output status of driver software (CP)
CL code of CPU in PC (valid if banks are synchronised)
DH CP status register (IO-address 280h)
DL PC status register (IO-address 281h)
Codes of the output statuses (version numbers) for BIOS, VGA and driver are BCD-coded in one
byte. That is, the value 10 (hex) is equivalent to version 1.0; 15 (hex) is equivalent to version
number 1.5 and 1A (hex) is equivalent to version 1.10.
This function does not execute any initializations in the banks.