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ZX Review #1-2
31 декабря 1996 |
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Returning to the printed - the last file dizzasemblera TR-DOS.
BACK TO PRINTED
In the recently released book us P. Fedin, "A full
description and complete disassembler TR DOS 5.04 (5.03) "due
to technological error was not published Last full file
disassembler. Bring authors and readers your apologize and
correct the admitted mistake. So:
Address 15361. Same as 15665.
JR 15 361 15 366
Address 15364. Same as 15642
JR 15 364 15 369
Address 15366. Same as 15665.
15366 JP 15616
Address 15369. Same as 15642.
15369 JP 15619
Address 15610. Same as 8433.
15610 JP 8433
Address 15613. Same as 15635, but does not switch firmware.
15613 JP 10300
Address 15616. Log in TR-DOS. Switches ROM.
15616 NOP
JR 15665
Address 15619. Executing commands TR-DOS from BASIC. Set
CH_ADD the prefix: REM: in front of the team. Returns in the BC
Code errors. Switches ROM.
15619 NOP
JR 15642
Address 15622. Sub-entry from a data file. Switches
Rom. When you call from the editor introduces a whole line and
produces output from the editor, otherwise it returns to the A
symbol in the file. 15622 NOP
JP 9711
Address 15626. Same as 15629, but does not switch firmware.
15626 JP 9290
Address 15629. Sub-output data file. Put symbol
in the battery. It is also used to address 15630. Both entry
points switch ROM.
15629 NOP
JR 15 630 15 626
Address 15632. Same as 8433. Switches ROM.
15632 NOP
JR 15610
Address 15635. Go to the subroutine subroutine call TR-DOS
of machine code. The address is a switch.
15635 NOP
JR 15613
Address 15638. Go to the error-handling routine. The address is
switch.
15638 NOP
JP 12137
Address 15642. Same as 15619, but does not switch firmware.
15642 CALL 15649; creation of system variables TR-DOS
PUSH HL; room on the stack address switch ROM BASIC
JP 364; command execution
Address 15649. Creation of system variables TR-DOS, if
it is not. In HL placed 23,746.
15649 CALL 12787; to check if the field of system variables
NOP
NOP
CALL C, 15,692, and if it does not exist, then create it
LD HL, 23746; loading in HL address switch ROM BASIC
RET; Returns
Address 15663. Switching ROM TR-DOS and the transition to any
address. The address put on the stack.
15663 NOP
RET
Address 15665. Log in TR-DOS.
15665 CALL 15649; creation of system variables
PUSH HL; room on the stack address switch ROM BASIC
JP 569, the entrance to the TR-DOS
Address 15672. Checking for Interface 1. In the case of
detection is the creation of its system variables and put in
23,793 1. For routine work should be moved to any place in RAM.
15672 XOR A; interface-1 is?
OUT (247), A
IN A, (247)
CP 1930
JR Z, 15,684, and if so, the establishment of its system
variables
CP 1931
RET NZ; if not, return
15684 RST 8; creation of system variables interface-1
DEFB # 31
LD A, 1; team-SAVE to record a copy of
LD (23791), A
RET; Returns
Address 15692. Creating a system variable TR-DOS. In the
presence of UI-1 before creating the variables TR-DOS are its
variables and placed 23,791 1. In the variables TR-DOS are
placed: at 23802 - 23804, 23752 - 23754, 23610, 23830 and 23820
- 255; at 23831, 23833, 23832, 23823 and 23839 - 0;
at 23746 - 201.
Also placed in the system registry 255, and the command issued
VG93 interrupts. Sub-corrupts memory calculator.
15692 XOR A; choose drive A: and Reset VG93
OUT (255), A
IN A, (246), it does nothing
LD HL, 15672; e routines check for the interface-1
LD DE, 23698, of any free address, RAM
LD BC, 20; length routines
LDIR; transfer routines in RAM
LD HL, 15719; return address from subroutine
PUSH HL; putting it on the stack
LD HL, 15663; address switch ROM TR-DOS
PUSH HL; putting it on the stack
JP 23698; launch routines
Address 15719. Creating a system variable TR-DOS. In the
variables fit:
at 23802 - 23805, 23752 - 23755, 23610, 23830 and 23820 - 255;
at 23831, 23833, 23832, 23823 and 23839 - 0;
at 23746 - 201.
Also placed in the system registry 255, and the command issued
VG93 interrupts.
15719 LD HL, 12176; return address from the ROM BASIC
PUSH HL; putting it on the stack
LD HL, 15663; address switch ROM TR-DOS
PUSH HL; putting it on the stack
LD HL, 5717; address MAKE_ROOM routines from the ROM BASIC
PUSH HL; putting it on the stack
LD HL, 23551; address switch ROM BASIC
PUSH HL; putting it on the stack
LD (HL), 201; room in RAM, command RET
LD HL, 23773; starting address of the system variables
LD BC, 112; the length of its
RET; launch sub MAKE_ROOM
Address 15744. Newline. It is also used to address 15746
(Print characters from the battery). Also, this routine
incorrectly used to address 15,755 subroutine 1270.
15744 LD A, 13; symbol ENTER
15746 PUSH HL; preservation registers
PUSH BC
PUSH DE
PUSH AF; preserve the character
CALL 8433; change memory
POP AF; recovery of the symbol
15754 CALL 15764; print symbol
CALL 8433; recovery of memory
POP DE; restore registers
POP BC
POP HL
RET; Returns
Address 15764. Print a character without changing the memory.
Put symbol in the battery.
15764 RST 32
DEFW # 0010
RET
Address 15768. Recovery with the expectation INTRQ. Used as
15,770 addresses (output of the command reg. A, with the
expectation INTRQ). 15768 LD A, 8; recovery
15770 OUT (1931), A
15772 PUSH HL; conservation HL
RST 32; test pressing BREAK
DEFW # 1F54
JR C, 15,781, and if pressed, the message is * BREAK *
RST 1932
DEFW # 1B7B
15781 POP HL; recovery HL
IN A, (255); INTRQ enrolled?
AND 128
JR Z, 15,772, and if not, then repeat
RET; Returns
Address 15789. Check availability of the disk in the drive. No
plants is not required.
15789 LD A, 8; restore command
CALL 15770; issuing commands and expecting INTRQ
LD DE, 0; for 65,536 passes of the index signal must
change
IN A, (31), we take the index signal for the sample
AND 2
LD B, A; memorize it
15802 IN A, (31), and take it again
AND 2
CP B; it changed?
RET NZ; if so, return
INC DE; next attempt
LD A, E; attempts to come to an end
OR D
JR NZ, 15,802, and if not, then repeat
JP 16103, the processing error NO DISC
Address 15816. The choice of drive specific defaults. Login:
You can set the time for moving the head and the drive mode
according to the description of team # 01. Yield: these
variables can be changed according to this description. It is
also used to address: 15,819 - to select the drive. Number set
in the reg. A, the rest as for the previous routine.
15,869 - delay in 725,779 cycles.
15,871 - delay of any desired length. In Reg. A set
number that determines the duration of the delay.
15816 LD A, (23833) take the number of drive by default
15819 LD (23798), A; setting numbers selected drive
LD HL, 23830; drive select
LD C, A
LD A, 60
OR C
OUT (255), A
LD (HL), A
CALL 15880; take the move drive heads
AND 128, bit 7 is off?
JR Z, 15,866, and if so, do not perform the initialization
CALL 15789; to check if a disk in drive
CALL 15894; the timing of movement of drive heads
CALL 15889; take a drive type
CP 255; in this variable, 255?
JR Z, 15,866, and if so, do not define it
PUSH HL; store address of a variable with the type of
drive
CALL 8138, the definition of the number of tracks the
drive
POP HL; restore address of a variable of type
CP 80; setting this variable
LD A, 0
JR NZ, 15865
LD A, 128
15865 LD (HL), A
Warning, Error! Not checked the drive and the number of parties
assumes that it is unidirectional.
15866 CALL 7734; check the index of the disk
15869 LD A, 0; delay in 725779 ticks
15871 LD C, 255
15873 DEC C
JR NZ, 15873
DEC A
JR NZ, 15871
RET; Returns
Address 15880. Sampling time moving the head of the current
drive. Set 23798. At the output of A will have time to move
drive heads, and HL - address to which it is located.
It is also used to address 15,883 (sampling parameter, the
drive; DE address in place table settings, and set 23798; On
output of A is a parameter in the HL - address of the cell).
15880 LD DE, 23802, take the address of the table travel speed
heads 15883 LD HL, (23798), the offset is the drive number
ADD HL, DE; address calculation of the cell with the
parameter
LD A, (HL); take out option
RET; Returns
Address 15889. Sample type drive. Input: Set 23798. Output:
A type of drive in HL - address of his cell.
15889 LD DE, 23752, take the address of the table types of disk
drives
JR 15883; selection option and returns
Address 15894. Determination of the time moving drive heads.
15894 CALL 15880; take the address of the cell with the time of
moving the head
LD B, 8, start with the smallest
LD C, 4, 4 attempts
15901 LD (HL), B; installation time moving the head
LD A, 8; recovery
CALL 15770
LD A, 32, positioned on track 32
LD B, 11
CALL 15940
LD B, (HL); take time moving the head
LD A, 1; positioning on the track 1 with a given time
CALL 15940
IN A, (31), and head to the track 0?
AND 4
JR NZ, 15935 and, if so, the error
XOR A; positioning on track 0
IN A, (31), and head to the track 0?
AND 4
RET NZ; if so, return
15935 INC B; increased time moving the head at 1
DEC C; next attempt
RET Z; if you attempt to run out, then return
JR 15901; repeat
Address 15940. Positioning. A place in the physical number of
paths in B - while moving the head and then away.
15940 OUT (127), A; room track number in the data register
LD A, B; receive positioning commands
OR 24
JP 2048 positioning, with fast speed
Attention! Here it is necessary JP 15,070, as Quench rate of
2048 bits moving head disk drive, thus positioning
only works with fast speed.
Address 15948. Positioning. At the entrance to A must be a
physical track number, and B - the move drive heads.
15948 OUT (127), A; download track number in the data register
PUSH BC; saving time, moving the head drive
LD B, A; head is already positioned?
IN A, (63)
CP B
POP BC; recovery time moving the head
PUSH AF; preservation of the check result
LD A, B; receive positioning commands
OR 24
CALL 2048 conversion and issuance of command and waiting
INTRQ
Attention! Positioning is carried out only with quick
velocity of the head, because in 2048 used AND 252.
To remedy the situation here you need to put JP 15770.
POP AF; restoration of the check result of head
RET Z; if the head was positioned, then return
PUSH BC; saving time, moving the head?
CALL 15869; delay in 725779 ticks
POP BC; recovery time moving the head
RET; Returns
Address 15971. Positioning drive heads. Entry: in reg. A
set the logical number of the desired track, and set
23757. The output of 23 757 is reset. It is also used to address
16032 (delay in 2,168,937 cycles).
15971 LD C, A; download track number in the register C
CALL 8171; choice of the upper side of the disc
CALL 15889; take a drive type
AND 2, the drive-way?
CALL NZ, 16042 and, if so, then the choice of
PUSH BC; keep track number
BIT 7, (HL); drive 40-track?
JR Z, 16,003, and if so, the track numbers do not change
BIT 0, (HL); use only 40 tracks?
JR NZ, 16,003, and if not, the track numbers do not change
IN A, (63), we take the current track number
CP C; head is already positioned?
JR Z, 16,002, and if so, the track numbers do not change
RLCA; divide the current track number 2
OUT (1963), A
LD A, C; divide the number of the desired track by 2
RLCA
16002 LD C, A
16003 CALL 15880; take the move drive heads
LD B, A
IN A, (63); head is positioned?
CP C
PUSH BC; keep the number of the desired track
CALL NZ, 15 869, if the head is not positioned, then the
delay in 725779
tick
POP BC; recovery rates to the desired track
LD A, C
CALL 15948; positioning
POP BC; recovery rates to the desired track
LD A, C; setting register tracks
OUT (1963), A
LD A, (23757) need a delay after the operation?
OR A
RET Z; if not, return
XOR A; the next time the delay is not required
LD (23757), A
16032 LD B, 3; delay in 2,168,937 cycles
16034 LD A, 255
CALL 15871
DJNZ 16034
RET; Returns
Address 16042. The choice of positioning. Entry: in the C place
logical track number and select the top side of the disc.
Exit: to be chosen by the parties in C would be a physical
track number. 16042 LD A, C; fission track number 2
OR A
RRA
LD C, A
RET NC; if the track number was even, then return
JP 8182, otherwise choose the lower side of the disc
Address 16050. Check the index of the track. Set
23761 and put it in B while moving drive heads. Chosen
upper side and the error in 23,831 is placed 255. In the case
H fits the current track number. It is also used to address
16103 (processing error NO DISC).
16050 CALL 8171; choice of the upper side of the disc
IN A, (31) take the state controller
AND 128; saving flag ready
LD (23757), A
IN A, (63), we take the current track number
LD H, A; in case of return
CALL 15940; transformation and the command of the Reg. B
Attention! CALL before 15,940 in the case B should be placed
during moving head disk drive, or command to be executed
before testing depends on the contents of the register B at the
entrance to subroutine and the consequences can be quite
disastrous.
LD C, 127; address data register
LD D, 1, specifying the number of attempts
DI; ban interrupt
LD A, 192; reading the index of
OUT (1931), A
PUSH BC; saving address data register
LD B, 3; determine the number of attempts
16078 IN A, (255), take the condition of the signals DRQ and
INTRQ
AND 192
JR NZ, 16144; if any signal was sent, then start reading
INC DE; next attempt
LD A, E
OR D
JR NZ, 16078
DJNZ 16078; repeat until the end of attempts
POP BC; recovery register address data
EI; permission to interrupt
LD A, 208; stop controller
OUT (1931), A
LD A, (23761), ignore the error?
Error! Must LD A, (23831).
CP 255
RET Z; if so, return
16103 CALL 10027; installation TAPE LOADING ERROR
LD A, 255, the next time a mistake to ignore
LD (23831), A
JP 10011, the processing error NO DISC
16114 POP BC; recovery register address data
IN H, (C); reading first byte
16117 IN A, (255), the expectation of a signal
AND 192
JR Z, 16117
EI; in case of return
Error! So it is possible to lose bytes when reading.
RET M; if entered INTRQ, then return
DI; ban interrupt
IN A, (127) Read byte
JR 16117; repeat
Address 16130. Needs no comment.
16130 LD (23807), A
RET
Address 16134. Similar to the previous one.
16134 LD (23808), HL
RET
Address 16138. Recording sector. Spozitsioniruyte head, and
then 23,807 and 23,808. 16138 LD A, 160; team record sector
JR 16144; go to subroutine read / write sector
Address 16142. Loading the sector. Set 23807 and 23808 and
spozitsioniruyte head. It is also used to address 16144 (Load /
write sector set for all 16,142 plus in the A place the command
to read or write sector). 16142 LD A, 128; read command sector
16144 LD (23806), A; installation team
16147 LD D, 10, 10 attempts
16149 PUSH DE; conservation counter attempts
DI; ban interrupt
LD A, (23807); installation sector
INC A
OUT (127), A
LD HL, (23808) take the address of the read / write
LD C, 127; take the address of the data register
LD A, (23806) instructs
OUT (1931), A
CP 160; was a team record industry?
PUSH AF
CALL Z, 16,314, and if so, then write data
POP AF
CALL NZ, 16341, otherwise read the data
POP DE; recovery counter attempts
EI; permission to interrupt
IN A, (31) take the state controller
LD B, A; save it
AND 127; all right?
RET Z; if so, return
LD HL, 10712; mail messages READ ONLY
AND 64; banned account?
JR NZ, 16203 and, if so, then go on processing errors
LD A, B; restoring the state controller
AND 4, was the loss of data?
JR Z, 16,288, and if not, the processing of disk errors
DEC D; next attempt
JR NZ, 16,149, and if efforts are not over, then repeat
10200 LD HL, 10722; mail messages DISC ERROR
16203 LD A, 208; command interrupt
OUT (1931), A
LD A, B; restoring the state controller
AND 1, the controller was busy?
JP NZ, 16103 and, if so, the treatment situation, NO DISC
IN A, (63), if an error occurs in sector 10 tracks
OR A; 0 then return (ignoring)
JR NZ, 16223
IN A, (127)
CP 10
RET Z
PUSH HL; conservation message address
CALL 7575; clear screen
POP HL; recovery message address
RST 24; print a message
LD HL, 10771; print TRK:
RST 1924
IN A, (63); print track number
CALL 7587
LD HL, 10776; Printing SEC:
RST 1924
IN A, (95); printing facilities sector
CALL 7587
LD HL, 10750; press RETRY, ABORT, IGNORE?
RST 1924
16251 CALL 4178; input keys
CP "I"; pressed I?
RET Z; if so, return
CP "R"; pressed R?
JR Z, 16,276, and if so, repositioning and repeat
CP "A"; pressed A?
JR NZ, 16,251, and if not, then re-enter the keys
CALL 10027; installation TAPE LOADING ERROR
LD A, 7; disk error
LD (23823), A
JP 467; completion
16276 LD A, (23797); repositioning
CALL 15971
CALL 16032; delay in 2,168,937 cycles
JP 16149; repeat
Error! It is necessary to JP 16147 to update the number of
attempts.
16288 DEC D; next attempt
JP Z, 16,200, or if attempts have ended, then processing
DISC ERROR
PUSH DE; conservation counter attempts
CALL 15880; take the move drive heads
AND 2, it equals 10?
JR NZ, 16301
INC (HL); if not, then increase it by 1
16301 CALL 15768; recovery
LD A, (23797); repositioning
CALL 15971
POP DE; recovery counter attempts
JP 16149; repeat
Address 16314. Writing data to disk. Set in the HL block address
data, DE - specifying the number of cycles during which
to begin recording in C - address of data register controller
and give the team record. It is also used to address 16330 (the
Same as 16314, but without treatment NO DISC).
16314 LD B, 4; set number of attempts
16316 IN A, (255); received any signal?
AND 192
JR NZ, 16337 and, if so, then start recording
INC DE; next attempt
LD A, E
OR D
JR NZ, 16316
DJNZ 16316
RET; if you attempt to run out, then return
16330 IN A, (255); received any signal?
AND 192
JR Z, 16,330, and if not, then wait for it
RET M; if entered INTRQ, then return
16337 OUTI; output bytes from your area in the data register
JR 16330; repeat
Address 16341. Reading data from disk. All plants are similar
subroutine 16314, but need to give read command. Used
also addresses 16357 (same as 16341, but without treatment
NO DISC).
16341 LD B, 4; set number of attempts
16343 IN A, (255); received anything?
AND 192
JR NZ, 16,364, and if so, begin to read
INC DE; next attempt
LD A, E
OR D
JR NZ, 16343
DJNZ 16343
RET; if you attempt to run out, then return
16357 IN A, (255); received any signal?
AND 192
JR Z, 16,357, and if not, then wait for it
RET M; if INTRQ, then return
INI; reading bytes
JR 16357; repeat
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