4f28289df2
- "Normalized" some Assembly code. - Implemented CFS_APPEND in pfs_open(). - Made CFS_WRITE work in VICE's virtual disk/file system.
113 lines
3.3 KiB
ArmAsm
113 lines
3.3 KiB
ArmAsm
;
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; Copyright (c) 2010, Kajtar Zsolt <soci@c64.rulez.org>
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; All rights reserved.
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;
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; Redistribution and use in source and binary forms, with or without
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; modification, are permitted provided that the following conditions
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; are met:
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; 1. Redistributions of source code must retain the above copyright
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; notice, this list of conditions and the following disclaimer.
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; 2. Redistributions in binary form must reproduce the above copyright
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; notice, this list of conditions and the following disclaimer in the
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; documentation and/or other materials provided with the distribution.
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; 3. Neither the name of the Institute nor the names of its contributors
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; may be used to endorse or promote products derived from this software
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; without specific prior written permission.
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;
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; THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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; ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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; FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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; OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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; HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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; LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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; OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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; SUCH DAMAGE.
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;
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; This file is part of the Contiki operating system.
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;
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; Author: Kajtar Zsolt <soci@c64.rulez.org>
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;
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;---------------------------------------------------------------------
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.define F_IDE64 0 ; c128 doesn't have IDE64
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.importzp ptr1, ptr2
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.import pfs_rwcommon, pfs_rwsetflags, pfs_rwcommonend
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.if F_IDE64
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.import ide64_rwprepare, ide64_rwfinish
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.endif
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.export _pfs_write
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;---------------------------------------------------------------------
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F_NBLK = %01000000 ;block read/write not available
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ST := $90 ;status
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; IDEDOS function
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WRITE := $DEF1
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; Kernal functions
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CHKOUT := $FFC9
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CLRCHN := $FFCC
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CHROUT := $FFD2
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;---------------------------------------------------------------------
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.code
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error5: jsr CLRCHN
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error2: ldx #>-1
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txa
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rts
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.proc _pfs_write
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jsr pfs_rwcommon ; pop params, check handle
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beq error2 ; not open
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.if F_IDE64
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asl a
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bmi nblk ; no block operation
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jsr CHKOUT
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bcs error2
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; check support
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jsr ide64_rwprepare
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bcs norm
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; do a block write
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jsr WRITE
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bcs nosup
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jmp ide64_rwfinish
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nosup: lda #F_NBLK
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jsr pfs_rwsetflags
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.endif
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; Valid lfn. Make it the output file
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nblk: jsr CHKOUT
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bcs error2
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; Output the next character from the buffer
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norm: ldy #0
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@L3: inc ptr1
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bne @L0
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inc ptr1+1
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beq @L2
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@L0: lda (ptr2),y
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inc ptr2
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bne @L1
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inc ptr2+1 ; A = *buf++;
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@L1: jsr CHROUT
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lda ST
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beq @L3
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bne error5 ; bail out on errors
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; Wrote all chars.; cancel the output channel
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@L2: jsr CLRCHN
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; Return the number of chars written
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jmp pfs_rwcommonend
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.endproc
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