🚀 go-pugleaf

In article <*> Stelios writes:
>
>I have a program that uses FSREAD to simply read a file. I get the LRECL
>etc. etc. and I allocate a buffer using DMSFREE. So I get
> Buf= 001F36A0 Lrecl = 24.
>which is the address in R1 and the LRECL. This is on a 2M virtual machine.
>Why would FSREAD terminate with return code 2 (invalid buffer address) ?
>In general when does FSREAD consider the buffer address to be invalid?
How did you store the buffer address into the parameter list, e.g.
      DMSFREE DWORDS=3
      LA      R5,0(,R1)                       (purify the high-order bits)
      LA      R6,FSCB                         (address of FSCB)
      FSREAD  FSCB=(R6),BUFFER=(R5),FORM=E    (can't use "R1" as an argument)
      ...
An address is invalid if you're running in 24-bit mode,
**and** the top-bit of the address is non-zero, e.g. X'80022222',
or if the address is greater than the VMSIZE full-word value in NUCON.