File size: 1,018 Bytes
94f6f0e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | ;Uncompression code for the extra data of MEMZ/VineMEMZ
;It has been optimized for the larger file sizes of VineMEMZ
;It's not backwards compatible to the old compressor!
mov bx, daddr
mov es, bx
mov ds, bx
;Read from disk
mov ax, 0x0216
mov cx, 0x0003
mov dh, 0
mov bx, compressed
int 13h
xor ax, ax
mov bx, ax
mov cx, ax
mov dx, ax
mov si, compressed
mov di, uncompressed
readcommand:
lodsb
cmp si, uncompressed
jae compressorDone
cmp al, 128
jae newdata
jmp olddata
newdata:
and al, 127
mov cl, al
newnextbyte:
lodsb
stosb
dec cl
cmp cl, -1
jne newnextbyte
jmp readcommand
olddata:
mov ah, 0
cmp al, 64
jb xxx
and al, 63
mov ah, al
lodsb
xxx:
mov cx, ax
lodsw
mov dx, si
mov si, di
sub si, ax
oldnextbyte:
lodsb
stosb
loop oldnextbyte
mov si, dx
jmp readcommand
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