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7-118
FCALL(P)
(4) When function devices (FX, FY, FD) are used by a subroutine program, specify a device with
to corresponding to the function device. The contents to the devices specified by
to are as indicated below.
(a) Prior to execution of the subroutine program, bit data is transmitted to FX, and word
data is transmitted to FD.
(b) After the execution of the subroutine program, the contents of FY and FD are
transmitted to the corresponding devices.
(c) The processing units for the function devices are as follows:
• FX, FY: Bits
• FD : 4-word units
The size of the data to be dealt with will differ depending on the device specified in the
argument. The device specified as a function device should be secured for the data
size. An error will occur if it cannot be secured for the data size.
*1: An error will not occur if the device number specified by to is not a multiple of 16 at the digit
designation of the bit device.
[Main routine program]
(5) The FCALL (P) instruction can use from to .
Function devices Device Data Size Remark
• FX
• FY
Bit device
1 point
––––
When Bit Designation has been Made for Word
Device
1 bit
• FD
When digit designation of a bit device is used*1
4 words
The upper 2 words of
FD become 0
Word device
4 words
––––
S1
S5
S1
S5
S1
S5
Occupies from D0 to D3 (Transfer to FD1).
X0
D30
Occupies from D30 to D33 (Transfer to FD2).
Occupies M0 (Transfer to FX0).
D0M0P0FCALL
S1
S5