mirror of
https://github.com/Tolik-Trek/RAM-Drive.git
synced 2026-06-15 09:21:33 +03:00
265 lines
4.5 KiB
NASM
265 lines
4.5 KiB
NASM
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ORG #8100-512
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INCLUDE "DOS_EQU.ASM"
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PAGE3 EQU #E2
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CR EQU 13
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LF EQU 10
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EN EQU 00
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DB "EXE" ;EXE ID
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DB #00 ;EXE VERSION
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DW #0200 ;CODE OFFSET LOW
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DW #0000 ;CODE OFFSET HIGH
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DW #0000 ;END-BEG ;PRIMARY LOADER
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DW #0000 ;
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DW #0000 ;RESERVED
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DW #0000 ;
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DW #8100 ;LOAD ADDRESS
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DW #8100 ;START ADDRESS
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DW #BFFF ;STACK ADDRESS
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DS 490
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BEG LD HL,MS0
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LD C,PCHARS
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RST #10
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DI
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LD BC,#00CE ; <20>®«ã票¥ ¨¤¥â¨ä¨ª â®à ¡«®ª , § 祮£® RAM-Disk
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NEXTRD LD A,B ; ®¬¥à RAM-Disk- 0..15
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PUSH BC
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RST #08
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POP BC
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OR A
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JR Z,FNDRD
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INC B
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LD A,B
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CP #10
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JR NZ,NEXTRD
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JP NORAMD
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FNDRD PUSH BC
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LD C,#C2 ; ¢ë¤¥«¥¨¥ ¡«®ª Ž‡“
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LD B,45 ; § ¯à 訢 ¥¬®¥ ç¨á«® áâà ¨æ Ž‡“ (45 = 720 kb)
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RST #08
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POP BC
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JP C,NOMEM
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PUSH AF
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LD C,A
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LD A,B ; ®¬¥à RAM-Disk- 0..15 - ᮮ⢥âáâ¢ã¥â RAM-Disk- ¬ ®â e: ¤® t:
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LD B,C ; ¨¤¥â¨ä¨ª â®à ¡«®ª
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LD C,#C9 ; § ç¨âì ¡«®ª ¯ ¬ï⨠RAM-Disk-ã
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RST #08
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POP AF
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LD C,PAGE3
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IN B,(C)
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OUT (C),A
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PUSH BC
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LD HL,#C000
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LD DE,#C001
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LD BC,#3FFF
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LD (HL),L
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LDIR
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LD HL,BPB ;boot sector [512Bytes]
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LD DE,#C000
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LD BC,BPBEND-BPB
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LDIR
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LD HL,#AA55
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LD (#C200-2),HL
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LD HL,#C200
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LD (HL),#F9
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INC L
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LD (HL),#FF
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INC L
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LD (HL),#FF
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INC L
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LD (HL),#00
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LD HL,#C200+(512*5)
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LD (HL),#F9
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INC L
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LD (HL),#FF
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INC L
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LD (HL),#FF
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INC L
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LD (HL),#00
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POP BC
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OUT (C),B
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LD HL,MS1
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LD C,PCHARS
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RST #10
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LD B,#00
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EXITT LD C,#41
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RST #10
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DI
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HALT
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NORAMD LD HL,MS2
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LD C,PCHARS
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RST #10
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LD B,1
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JP EXITT
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NOMEM LD HL,MS3
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LD C,PCHARS
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RST #10
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LD B,1
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JP EXITT
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;
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; RAMDRIVE 720
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; RAMDRIVE E:720
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; 0 1 2 3 4 5 6 7 8 9 A B C D E F
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;
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;GETPARM LD A,#FF
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; LD (RDRIVE),A
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; LD (RSIZE),A
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; LD D,XH
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; LD E,XL
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; EX DE,HL
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; LD E,(HL)
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; INC HL
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; LD D,0
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; EX DE,HL
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; ADD HL,DE
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; LD (HL),0
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;NEXTPRM EX DE,HL
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; LD DE,BUFFER
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; LD C,GSWITCH
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; RST #10
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; EX DE,HL ;SAVE HL IN DE
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; LD HL,BUFFER
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; LD A,(HL)
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; INC HL
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; OR A
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; RET Z
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; CP "/"
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; JR NZ,NOSLASH
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; LD A,(HL)
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; INC HL
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; CALL UPPER
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; CALL ATOHEX
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; JP C,ILLEGAL
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; LD (RDRIVE),A
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; LD A,(HL)
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; OR A
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; JR Z,NEXTPRM
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; JP ILLEGAL
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;
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;NOSLASH CP ":"
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; JP NZ,NOSIZER
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; LD IX,0
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;NDIG LD C,XL
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; LD B,XH
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; ADD IX,IX ;X2
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; ADD IX,IX ;X4
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; ADD IX,BC ;X5
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; ADD IX,IX ;X10
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; JP C,ILLEGAL
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; LD A,(HL)
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; OR A
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; JR Z,ENDSZ
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; CALL UPPER
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; CP "K"
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; JR Z,ENDSZ
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; CALL ATODEC
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; LD C,A
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; LD B,0
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; ADD IX,BC
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; JR NDIG
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;ENDSZ LD A,XL
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; LD C,A
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; LD B,XH
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; SRL B
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; RR C
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; SRL B
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; RR C
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; SRL B
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; RR C
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; SRL B
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; RR C
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; AND #0F
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; JR Z,L101
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; INC BC
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;L101 LD A,B
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; OR A
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; JP NZ,ILLEGAL
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; LD A,C
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; LD (RSIZE),A
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; JP NEXTPRM
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;NOSIZER JP ILLEGAL
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;ATODEC CP "0"
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; RET C
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; CP ":"
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; CCF
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; RET C
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; SUB "0"
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; RET
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;ATOHEX CP "0"
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; RET C
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; CP ":"
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; JR NC,TRYHEX
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; SUB "0"
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; AND A
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; RET
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;TRYHEX CALL UPPER
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; CP "A"
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; RET C
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; CP "G"
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; CCF
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; RET C
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; SUB "A"
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; RET
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;UPPER CP "a"
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; RET C
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; CP "z"+1
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; RET NC
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; SUB #20
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; RET
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MS0 DB "RAMDRIVE DRIVER (C) 1999 PETERS Plus ltd.",CR,LF,CR,LF,EN
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MS1 DB "RAM DISK created",CR,LF,EN
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MS2 DB "No free RAM-DISK",CR,LF,EN
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MS3 DB "No free memory, for create RAM-DISK",CR,LF,EN
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MS4 DB "Illegal parametr",CR,LF,EN
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MS5 DB "Usage : RAMDRIVE [/drive 0...F] [:size]",CR,LF,EN
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; Area for boot sector [512Bytes]
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BPB DB #EB,#3C,#90 ; +00 JMP
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DB "DOS_X.XX" ; +03 DOS NAME
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; Block Parameters BIOS
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DW #0200 ; +0B BYTE PER SECTOR
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DB 1 ; +0D SECTORS PER CLUSTER
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DW 1 ; +0E RESERVE SECTORS
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DB 2 ; 1 ; +10 AMOUNT FATS
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DW 112 ; +11 FILES IN DIRECTORY
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DW 1440 ; +13 ALL SECTORS ON DISK
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DB #FA ; +15 ID FORMAT
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DW 5 ; +16 SIZE FAT IN SECTORS
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DW 9 ; +18 SECTOR PER TRACK
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DW 2 ; +1A AMOUNT SIDES
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DW 0,0 ; +1C HIDDEN SECTORS
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DW 0,0 ; +20 ALL SECTORS BIG
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DW #0080 ; +24 PHISICAL DRIVE NUMBER
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DB #29 ; +26 EXTENDED RECORD SIGNATURE
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DW #104B,#D765 ; +27 SERIAL VOLUME NUMBER
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DB "NO NAME " ; +2B DISK LABEL
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DB "FAT12" ; +36 FAT ID
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BPBEND
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; DEFS 453,0
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; end boot sector
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