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ReC98/libs/master.lib/bfill.asm

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General cleanup Mostly moving spurious null bytes, which are actually supposed to denote alignment, into their associated slices, but also prettying up some of the very first slices.
2014-10-20 15:20:04 +00:00
; master library - (pf.lib)
;
; Description:
; 読み込みバッファへの充填と先頭バイトの読み込み
;
; Functions/Procedures:
; int bfill(bf_t bf);
;
; Parameters:
; bf bファイルハンドル
;
; Returns:
; -1 ファイル終端に達したので1バイトも読めなかった
; 0〜255 バッファの先頭バイト(充填成功)
;
; Binding Target:
; Microsoft-C / Turbo-C / Turbo Pascal
;
; Running Target:
; MS-DOS
;
; Requiring Resources:
; CPU: 186
;
; Notes:
;
;
; Assembly Language Note:
;
;
; Compiler/Assembler:
; TASM 3.0
; OPTASM 1.6
;
; Author:
; iR
; 恋塚昭彦
;
; Revision History:
; BFILL.ASM 571 94-05-26 22:44
; 95/ 1/10 Initial: bfill.asm/master.lib 0.23
[Reduction] #5: bfill To get anywhere, we must become able to include assembly files that define their own segments. But this will only work if we include these files in the order they appear in in our dumps, *starting from the very first one*. And to include the very first one, we must first get rid of the erroneous references to the first few bytes of the data segment... and this function happens to be the first one referencing those.
2014-08-10 09:47:36 +00:00
Restore master.lib's FUNC and ENDFUNC macros With seg000 changed to word alignment and all definitions for "func" removed, the master.lib functions can keep their exact alignment themselves. [Binary change] db 0 → nop before get_machine_98() in the MAIN.EXE and MAINE.EXE files of TH04 and TH05, respectively.
2014-08-20 13:25:40 +00:00
func BFILL ; bfill() {
General cleanup Mostly moving spurious null bytes, which are actually supposed to denote alignment, into their associated slices, but also prettying up some of the very first slices.
2014-10-20 15:20:04 +00:00
push BP
mov BP,SP
push DS
[Reduction] #5: bfill To get anywhere, we must become able to include assembly files that define their own segments. But this will only work if we include these files in the order they appear in in our dumps, *starting from the very first one*. And to include the very first one, we must first get rid of the erroneous references to the first few bytes of the data segment... and this function happens to be the first one referencing those.
2014-08-10 09:47:36 +00:00
General cleanup Mostly moving spurious null bytes, which are actually supposed to denote alignment, into their associated slices, but also prettying up some of the very first slices.
2014-10-20 15:20:04 +00:00
;arg bf:word
@@bf = (RETSIZE+1)*2
mov DS,[BP+@@bf] ; BFILE構造体のセグメント
mov BX,DS:[b_hdl]
mov CX,DS:[b_siz]
lea DX,DS:[b_buff]
msdos ReadHandle
jc short @@_error
chk AX
jz short @@_error
@@_getc:
dec AX
mov DS:[b_left],AX
mov DS:[b_pos],1
mov AL,DS:[b_buff]
clr AH
pop DS
pop BP
ret (1)*2
[Reduction] #5: bfill To get anywhere, we must become able to include assembly files that define their own segments. But this will only work if we include these files in the order they appear in in our dumps, *starting from the very first one*. And to include the very first one, we must first get rid of the erroneous references to the first few bytes of the data segment... and this function happens to be the first one referencing those.
2014-08-10 09:47:36 +00:00
@@_error:
General cleanup Mostly moving spurious null bytes, which are actually supposed to denote alignment, into their associated slices, but also prettying up some of the very first slices.
2014-10-20 15:20:04 +00:00
clr AX
mov DS:[b_left],AX
dec AX ; mov AX,EOF
pop DS
pop BP
ret (1)*2
Restore master.lib's FUNC and ENDFUNC macros With seg000 changed to word alignment and all definitions for "func" removed, the master.lib functions can keep their exact alignment themselves. [Binary change] db 0 → nop before get_machine_98() in the MAIN.EXE and MAINE.EXE files of TH04 and TH05, respectively.
2014-08-20 13:25:40 +00:00
endfunc ; }