zasm: can now assemble fs.asm!
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@ -77,40 +77,40 @@
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; Number of handles we want to support
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; FS_HANDLE_COUNT
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; *** CONSTS ***
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FS_MAX_NAME_SIZE .equ 0x1a
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FS_BLOCKSIZE .equ 0x100
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FS_METASIZE .equ 0x20
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.equ FS_MAX_NAME_SIZE 0x1a
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.equ FS_BLOCKSIZE 0x100
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.equ FS_METASIZE 0x20
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FS_META_ALLOC_OFFSET .equ 3
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FS_META_FSIZE_OFFSET .equ 4
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FS_META_FNAME_OFFSET .equ 6
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.equ FS_META_ALLOC_OFFSET 3
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.equ FS_META_FSIZE_OFFSET 4
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.equ FS_META_FNAME_OFFSET 6
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; Size in bytes of a FS handle:
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; * 2 bytes for current position. (absolute)
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; * 2 bytes for starting offset, after metadata
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; * 2 bytes for maximum offset
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; * 2 bytes for file size (we could fetch it from metadata all the time, but it
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; could be time consuming depending on the underlying device).
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FS_HANDLE_SIZE .equ 8
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FS_ERR_NO_FS .equ 0x5
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FS_ERR_NOT_FOUND .equ 0x6
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.equ FS_HANDLE_SIZE 8
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.equ FS_ERR_NO_FS 0x5
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.equ FS_ERR_NOT_FOUND 0x6
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; *** VARIABLES ***
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; A copy of BLOCKDEV routines when the FS was mounted. 0 if no FS is mounted.
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FS_GETC .equ FS_RAMSTART
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FS_PUTC .equ FS_GETC+2
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FS_SEEK .equ FS_PUTC+2
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FS_TELL .equ FS_SEEK+2
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.equ FS_GETC FS_RAMSTART
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.equ FS_PUTC FS_GETC+2
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.equ FS_SEEK FS_PUTC+2
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.equ FS_TELL FS_SEEK+2
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; Offset at which our FS start on mounted device
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FS_START .equ FS_TELL+2
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.equ FS_START FS_TELL+2
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; Offset at which we are currently pointing to with regards to our routines
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; below, which all assume this offset as a context. This offset is not relative
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; to FS_START. It can be used directly with fsblkSeek.
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FS_PTR .equ FS_START+2
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.equ FS_PTR FS_START+2
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; This variable below contain the metadata of the last block FS_PTR was moved
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; to. We read this data in memory to avoid constant seek+read operations.
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FS_META .equ FS_PTR+2
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FS_HANDLES .equ FS_META+FS_METASIZE
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FS_RAMEND .equ FS_HANDLES+(FS_HANDLE_COUNT*FS_HANDLE_SIZE)
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.equ FS_META FS_PTR+2
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.equ FS_HANDLES FS_META+FS_METASIZE
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.equ FS_RAMEND FS_HANDLES+FS_HANDLE_COUNT*FS_HANDLE_SIZE
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; *** DATA ***
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P_FS_MAGIC:
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@ -371,7 +371,7 @@ fsOpen:
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push hl
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push de
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push af
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ex hl, de
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ex de, hl
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ld hl, (FS_PTR)
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ld a, FS_METASIZE
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call addHL
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@ -454,15 +454,13 @@ fsPutC:
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; It is an offset that starts at actual data.
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; Sets Z if offset is within bounds, unsets Z if it isn't.
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fsSeek:
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ld ixh, d
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ld ixl, e
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push de \ pop ix
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ld (ix), l
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ld (ix+1), h
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ret
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fsTell:
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ld ixh, d
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ld ixl, e
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push de \ pop ix
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ld l, (ix)
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ld h, (ix+1)
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ret
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@ -5,4 +5,18 @@
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.equ ZASM_RAMEND ZASM_CTX_PC+2
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#include "core.asm"
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#include "zasm/util.asm"
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#include "parse.asm"
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.equ BLOCKDEV_RAMSTART ZASM_RAMEND
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.equ BLOCKDEV_COUNT 0
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#include "blockdev.asm"
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.equ FS_RAMSTART BLOCKDEV_RAMEND
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.equ FS_HANDLE_COUNT 0
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#include "fs.asm"
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;#include "zasm/util.asm"
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;.equ IO_RAMSTART ZASM_RAMEND
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;#include "zasm/io.asm"
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zasmIsFirstPass:
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nop
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