romych/sprinter-unzip
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Fix offsets

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This commit is contained in:
boykovra 2024-06-21 14:24:00 +03:00
parent c761928096
commit 24b202f0b7
1 changed files with 43 additions and 30 deletions
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59
unzip.asm
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@ -1362,15 +1362,18 @@ NO_B_TO_WR
RET
FILL_3
DS TEMP_BUFFR-FILL_3, 0
DB 0
ALIGN 0x2000, 0
DB 0
ALIGN 0x1000, 0
;DS TEMP_BUFFR-FILL_3, 0
ORG 0xB000
; 4096 bytes buffer AFFF-BFFF
TEMP_BUFFR
DS 6, 0
GPP_FLAG
DB 0, 0
TEMP_BUFFR_8
DS 18, 0
LH_FN_LEN_L
DB 0
@ -1384,7 +1387,7 @@ LH_FILENAME
DS 1024, 0
;PAGE3_ADDR
ALIGN 16384, 0
ALIGN 0x4000, 0
ORG 0xC000
DS 4096, 0
@ -1545,8 +1548,11 @@ EXTRA_BITS
DB 1, 3, 7, 15, 31, 63, 127, 255 ; 2^n-1
BL_CNT
DS 70,0
DS 34,0
BL_CNT_17
DW 0
BL_CNT_18
DS 34,0
; ----------------------------------------------------
; Return A number of bits in HL from block
; ----------------------------------------------------
@ -1714,7 +1720,7 @@ GET_NXT_CL
PUSH HL
LD HL,LIT_TR
ADD HL,DE
LD (HL),A ; => ram_db8a
LD (HL),A ; reorder code lengths alphabet in straigth order
POP HL
POP DE
INC HL
@ -1725,7 +1731,7 @@ GET_NXT_CL
LD HL,CL_TR
LD DE,LIT_TR
LD BC,NR_CL
CALL BUILD_CODE
CALL BUILD_CODE ; build huffman codes for codelength
LD HL,(HLIT)
LD DE,(HDIST)
ADD HL,DE
@ -1819,6 +1825,11 @@ HDIST+* LD BC,0x0
POP BC
RET
; ------------------------------------------------------
; Build huffman codes by coldee lengths
; In: HL - Pointer to dest huffman tree
; DE - Pointer to code lenthts table
; BC - Length of code lengths table
; ------------------------------------------------------
BUILD_CODE
LD A,B
@ -1829,7 +1840,7 @@ BUILD_CODE
LD HL,BL_CNT
PUSH HL
PUSH BC
LD BC,0x2000
LD BC,0x2000 ; ToDo: may be 0x2600?
; BL_CNT[32]=0
BL_CNT_0
@ -1844,7 +1855,7 @@ BC_LP_1
LD A,(DE) ; DE -> LIT_TR
INC DE
ADD A,A
ADD A,9 ; distance*2 + 9
ADD A,low(BL_CNT) ; len*2 + offset
LD L,A
INC (HL)
JR NZ,BC_NO_L
@ -1857,7 +1868,7 @@ BC_NO_L
OR C
JR NZ,BC_LP_1
LD L,45
LD L,low(BL_CNT_18) ; 45
LD (HL),C
INC HL
LD (HL),C
@ -1866,7 +1877,7 @@ BC_NO_L
INIT_BUFF4
LD A,C
ADD A,0x9
ADD A,low(BL_CNT)
LD L,A
LD E,(HL)
INC HL
@ -1880,7 +1891,7 @@ INIT_BUFF4
INC C
INC C
LD A,C
ADD A,43
ADD A,low(BL_CNT_17) ; 43
LD L,A
LD (HL),E
INC HL
@ -1893,7 +1904,7 @@ INIT_BUFF4
LD D,B
LD E,B
LD A,15
LD L,11
LD L,low(BL_CNT)+2
INIT_BUFF5
LD C,(HL)
@ -1915,7 +1926,7 @@ CHAR_L_NE0
NR_SYM+* LD BC,0x0
LD HL,NODES
INIT_BUFF6
LD A,(DE) ; Char lengths?
LD A,(DE) ; DE => LIT_TR + offset
INC DE
PUSH DE
ADD A,A
@ -1924,7 +1935,7 @@ INIT_BUFF6
JR Z,CHAR_L_E0
PUSH HL
LD H,high BL_CNT ; 0xD2
ADD A,(low BL_CNT) + 34 ; +43
ADD A,low BL_CNT_17 ; +43
LD L,A
LD E,(HL)
INC HL
@ -1950,19 +1961,19 @@ CHAR_L_E0
LD HL,NODES
LD BC,(NR_SYM)
INIT_BUFF7
LD A,(DE)
LD A,(DE) ; DE => LIT_TR+offset
INC DE
DEC A
JP M,INIT_BUFF11
JP M,INIT_BUFF11 ; code=0 or 1
JR Z,INIT_BUFF11
PUSH DE
LD E,(HL)
LD E,(HL) ; HL => NODES + offset
INC HL
LD D,(HL)
LD D,(HL) ; DE = [NODES + offset]
PUSH HL
LD HL,0x0
INIT_BUFF8
SRL D
SRL D ; DE >> 1
RR E
ADC HL,HL
EX AF,AF'
@ -1995,13 +2006,13 @@ INIT_BUFF11
OR B
JR NZ,INIT_BUFF7
LEN_PTR+* LD HL,0x0000
LEN_PTR+* LD HL,0x0000 ; HL => CL_TR
LD E,L
LD D,H
INC DE
LD BC,511
LD (HL),A
LDIR ; Shift LEN_TR right 1 byte
LDIR ; Shift CL_TR or LEN_TR right 1 byte
POP HL
LD BC,(NR_SYM)
DEC BC
@ -2019,7 +2030,7 @@ INIT_BUFF12
JR Z,INIT_BUFF16
CP 0x9
PUSH DE
LD D,(HL)
LD D,(HL) ; => NODES + offset
DEC HL
LD E,(HL)
INC HL
@ -2259,12 +2270,14 @@ LEN_LD
DISTANCES
DS 32,0
;
CL_TR
DS 512,0
N_CODE
DS 512,0
; Command codes lengths
LIT_TR
DS 4 * NR_LIT, 0