XFREAD

Description

Read byte from files

Input

• AY contains the length to read
• PTR_READ_DEST must be set because it's the ptr_dest
• X contains the fd id

Output

A & X contains the length read

Example

    .include "telestrat.inc"

    lda #<$A000
    sta PTR_READ_DEST
    lda #>$A000
    sta PTR_READ_DEST+1

    lda #<12 ; Read 12 bytes
    ldy #>12 ; REad 12 bytes
    ldx fp
    BRK_KERNEL XFREAD
    ; A & X contains the length (since Kernel 2023.2)
    rts

See fread macro from orix-sdk to use it

XFREAD returns the size in A & X since kernel 2023.2, previous versions the length must be compute from

XFREAD does not manage two opened files before kernel 2022.4.