4cade/src/glue.prorwts2.lc2.a

;license:MIT
;(c) 2018-2020 by 4am & qkumba
;
; ProRWTS2 glue functions
;
; /!\ These live in LC RAM 2 and rely on the ProRWTS code which is also in LC RAM 2. /!\
; Code in LC RAM 1 (which is most program code) should call the functions in glue.prorwts2
; and parse.prefs which handle bank switching for you.

LoadFileInternal
         ldx   #0                    ; 0 = read into main memory
LoadFileAuxInternal
         +LDADDR gPathname
LoadFileDirect
         +ST16 namlo                 ; set filename
         txa
         pha
         jsr   traverse              ; go to subdirectory, set up filename for read
         lda   #cmdread              ; read (instead of write)
         sta   reqcmd
         lsr
         sta   auxreq
         lda   ldrhi
         bne   +                     ; if caller provided a load address, use it
         sta   sizelo                ; otherwise query the load address from file metadata
         sta   sizehi                ; 0 = query load address
         jsr   hddopendir            ; call ProRWTS2
         +LD16 ldrlo2
         +ST16 ldrlo
+        lda   #$FF                  ; read entire file (ProRWTS2 will figure out exact size)
LoadFileInternal_SizePatch
         sta   sizehi
         pla
         sta   auxreq
JumpOpen
         jmp   hddopendir            ; exit via ProRWTS2

LoadDHRFileInternal
         +LDADDR gPathname
         +ST16 namlo                 ; set filename
         jsr   traverse              ; go to subdirectory, set up filename for read
         lda   #$20
         sta   sizehi
         asl
         sta   ldrhi                 ; into $4000
         lda   #cmdread              ; read (instead of write)
         sta   reqcmd
         ;;lda   #1                    ; 1 = read into aux memory
         sta   auxreq
         lsr                         ; read first $2000 bytes
         sta   sizelo
         sta   ldrlo
         jsr   hddopendir            ; call ProRWTS2
         lda   #$20                  ; read next $2000 bytes
         sta   sizehi
         dec   auxreq                ; 0 = read into main memory
         clc                         ; not a subdirectory
         jmp   hddrdwrpart           ; call ProRWTS2

SaveSmallFileInternal
         +LDADDR gPathname
         +ST16 namlo                 ; set filename for ProRWTS2
         jsr   traverse              ; go to subdirectory, set up filename for read
         ;lda   #cmdread              ; read (instead of write)
         ;sta   reqcmd
         lda   #0                    ; 0 = read into main memory
         sta   sizelo
         ;sta   sizehi                ; 0 = query load address
         ;jsr   hddopendir            ; call ProRWTS2         
         ;lda   ldrlo2
         sta   ldrlo
         lda   #>kGlobalPrefsBuffer ;lda   ldrhi2
         sta   ldrhi
         lda   #cmdwrite             ; write (instead of read)
         sta   reqcmd
         sta   sizehi                ; 512 bytes
         bne   JumpOpen              ; exit via ProRWTS2 (must re-open the file after query)