Think #30 09 августа 1999

Игры

Overview of new products - Pussy, TR-Dos/MS-Dos converter.

             REVIEW novelties



Author: GROUP
Genre: Arcade + puzzle action ...


  Do you like Wilma Titanic "- in the main
role in the starring Leonardo DiCaprio? - So this game is for 
you ... 

  In the Intro to the game you can read the story of Leonardo, 
on his journey to Titanice. Thus, in the game you play for 
Leonardo and Your task is to rescue your beloved girlfriend - 
Kate (Kate). Be very careful, because every step you 
substituting 



regatta different prepyadstviya (behind bomb shifty moles 
killer ...) 



         TR-DOS/MS-DOS converter


Author: RUBY


  Designed for use with TR-DOS and MSDOS disks. Supported modes
turboloader and # 3D13 (vinchestr). The screen is divided into 
four parts: 

 - TR-DOS panel;
 - MS-DOS panel;
 - TR-DOS and MS-DOS info;
 - Setup Menu.

MANAGEMENT:

Q, A, O, P, 6,7,8,9 - cursors
Enter, 0 - activation of the subdirectories
CS +3 - Page Up, CS +4 - Page Down,
CS + Space - something like Escape.

NECESSARY CONDITIONS FOR THE WORK:


 - TR-DOS disk must have a type;
 - MS-DOS disk must have a sector length
512 bytes, a cluster of 1024 bytes (two
sector) and all other parameters
bootsector-but within reason. If
root directory will have more files
128, it will be accessible only to 128.



TR-DOS panel:


Box of 128 files with the conclusion of deleted files. Deleted 
files begin with a (Code 1).




MS-DOS panel:


Box of 128 files with the conclusion of deleted files. If you 
file more than 128, then they will be viewed in that window. 
The first element subdirectory <.> is not displayed.

Deleted files start with the symbol x (code
229). If the file length is greater than
999999, then instead of the number will be displayed
ERROR.

TR-DOS and MS-DOS info:


# of free sectors / clusters;
# of selected files;
Amount of space as those files occupy
sectors;
Amount of space as those files occupy
Clusters (kilobytes).

SETUP MENU:



Gluing - gluing files into one with a name
first marked on a copy from TRDOS in MS-DOS. # Of clusters in 
the TR-DOS info depends on this option.


Widening. - Use three-letter
extensions to TR-DOS (type + start file).

Breakdown - the names of files will be broken
numbered 0 .. 9 and etc. to refer to ASCII,
and if the option <name>, this sequence symbol will be recorded 
in the 8th byte of the name, but if the option <ext>, then the 
file type. Name the first file remains unchanged.


Split - # of sectors to be
split files when copying izMS-DOS
in TR-DOS. Under zero means 256.

TR-DOS drv - drive to work with TR-DOS:
A, B, C, D.

MS-DOS drv - drive to work with NMSDOS: A, B, C, D.

Drv A ... Drv D - type of drive. Programa
does not determine the type of drive, so specify it themselves. 
If the type is specified - works turboloader, if specified # 
3D13 - reading and writing to TR-DOS disk with this drive

will be performed through # 3D13.

 - retains all the menu options
units in the first sector of file TRMSCONV B
for TR-DOS disk drive.



Hot keys:


1 - read the TR-DOS disk.

2 - read the MS-DOS disk.

Space - note file (stored sequence of notes).

+, K - check all the files in order.

-, J - remove marks from all files.

CS +9 - sosstanovlenie last use of the drive. If your drive is 
done Positioning the head on the track with the number more so 
where a 80 .. 84, then press this key when the Disk error, but

then click Ignore, if you are looking to further
somehow continue reading or writing.

R - Rename

Pereimenovuet TRDOS / MS-DOS file, and
TR-DOS file pereimenovuetsya in agreement with
option <widening.>. When recording a TR-DOS directory is a 
correction to the islands and just worn out files, so you can 
retrieving erased TR-DOS files pereimenovuya them. Do not check 
for existing files. 

D - delete

Removes TR-DOS/MS-DOS files, empty
subdirectories. When you delete a TR-DOS all
File # of free sectors is not taken
of the type of disc, and the number of first sector
written # 0001.

M - to create a subdirectory

Subdirectory is created, and tested
the presence of an existing one.

F - MS-DOS format

Supports three MS-DOS format: 720K,
360K, 180K.
After the conclusion of the message: , Keys A, B, C, D chosen drive X and Enter - start 
formatting. After formatting each track there is a check, and 
if a double sector not be read without error, then the cluster

which is equal to the sector, will
marked as bad in the future FAT table.

The structure of the track:

- The last gap (88 bytes)
- An index label # FC,
- The first space (50 bytes)
- The second space (22 bytes)
- The third gap (30 bytes).

C - copy

When copying a file length is adjusted - compared with a-tion 
sector / chain in the FAT table, and if not identical, then the 
length is taken equal to <# of sectors> * 256 / <# of cluster 
chain in the FAT Table> * 1024. There is no check on the 
availability of existing files. When you copy a region used 
TR-DOS and MS-DOS directories in your computer's memory, so by

copying is complete, you want to forcibly read a directory in 
order to avoid unpredictable situations at work out. 


Copy of the TR-DOS with MS-DOS


Reading TR-DOS disk is continuously and recorded on MS-DOS disk 
is in the file: write header file, write to the file, FAT table 
entry (broke build structure subdirectories). If <widening.> Is 
Off, then in the name extension of MS-DOS file will be written 
three spaces. If <Gluing> On, then the length of MS-DOS file 
will be: <# Of sectors 1 file> * 256 + <k-in

sectors of the 2-nd file> * 256 + ... +
<Otkorrektirovanaya length of the last file>. If you have 
erased MS-DOS files, then their place are recorded TR-DOS 
files. All small letters of the TR-DOS files are converted into 
large, because the MS-DOS all the files and directories with 
large letters, but the characters codes 0 .. 31 .. 255 and 128 
are overwritten without changes. While the program allows you 
to enter the deleted subdirectories, nothing better there will 
not burn because of unpredictable consequences.




Copying from MS-DOS in TR-DOS


In memory immediately creates a directory TR-DOS
disc, then goes up continuously
the figures and in the end is recorded catalog TRDOS drive. If 
<widening.> Is Off, then TR-DOS file will be of type C and start

32768. It is possible to copy subdirectories, or rather header 
files subdirectory. 


Some features


When reading the root directory of the sequence read as 
follows: Reading bootsector-well, validating its

parameters (512 bytes per sector, 2 sectors
to a cluster disk is not greater than 900K, one or
two heads), the definition of the type of disc
(80/DS - 80 tracks, the two sides; 40/SS -
40 tracks, one side; 80/SS; 40/DS),
read the first copy of FAT table, if
It will be a cluster with a number greater than
# 0400, then read and verify the remaining copies, reading the 
root directory. If all copies of the FAT tables have a cluster

number greater than # 0400, then the program
will work with the latest copy. When
reading all the subdirectories of this sequence is absent. If 
the drive type is not the type of disc (40-track

drive and 80-track disc drive or a one-sided and double-sided 
disc), then If so, you will be able to work only with

TR-DOS directory.
Recording done FAT table in all copies.
The program itself determines what we have to-Drive:
TR-DOS or MS-DOS (along the length of the sector in the header 
of the sector), so if you mix up TR-DOS with MS-DOS, or vice 
versa - then nothing terrible. But do not confuse the TR-DOS or

MS-DOS disks - it will lead to incorrect
record.
TR-DOS disk must have a type -
B # E3 8-th sector should be in the range # 16 - # 19.
When recording to the MS-DOS drive date and time
file recorded 8-28-98 and equal
2:05 p.
In mode # 3D13 all neprotestirovanye
drives are considered as 80/DS and does not check for TR-DOS 
disk. Using # 3D13 with MS-DOS can not. Mode # 3D13 was

introduced to work with vinchestrom, but I recommend using it 
when working with drives which do not delay promotion of the 
engine. Using turboloader-and on such drives are often

leads to the destruction of sectors when writing
(Read - normal) because of failure
motor speed required
values.

Working with extended memory


After downloading the program is the definition of
PC: 48K or 128K (respectively
16K of free memory and 96K). If 128K,
then looks for a file on the boot TRMSDRV C
disk, and if found - will request to use it or not, but if not, 
then will be selected by the configuration of 128K.


 Driver extended memory TRMSDRV C

Consider this example, the driver
Scorpion-a, where pages 8-15 are selected
installing the 4-th bit port # 1FFD to "1", and
will not use 2,5,8 and 9 pages
(Total pages 16.4 = 12).


      ORG # 5B00

      DEFB 12, # of pages used

      PUSH BC

      PUSH HL

      LD HL, PAGES

      ADD A, L; in A - LUN

                                  page

      LD L, A

      LD A, (HL)

      AND 16

      LD BC, # 1FFD

      OUT (C), A

      LD A, (HL)

      OR 16

      LD B, # 7F

      OUT (C), A

      POP HL

      POP BC

      RET
PAGES DEFB 0,1,3,4,6,7

      DEFB # 12, # 13, # 14, # 15, # 16, # 17

The length of the driver should not exceed 127
bytes. Allowed to change only a few register-AF. The output of 
the zero flag Z has be able to NZ.



Some messages


 Error in the FAT table or wrong
 pointer to the first cluster

When you work with the FAT table / sample pointer of the first 
cluster of the file header caught the cluster number greater 
than # 0400. 

 Error in the subdirectory

The first two elements should subdirectory
be <.> and <..>, with valid
pointers first cluster.

 System Tray: bad sector X

X - the physical number of sectors.
When MS-DOS format was bad
sector in the system tray (bootsector,
two FAT table, root directory), and
therefore it can not be marked as bad
cluster in the FAT table. By pressing R, you can
again format the track, but if
it will not lead to success, then the use of
this disk is rather difficult.


Features of MS-DOS disks 800K


I still can not understand how MS-DOS
works fine with these discs, because
the point here is the following:
track has not 9, and 10 sectors, with
the last sector mainly recorded
without check code (CRC), which is written after the body of 
data sector (2 bytes), and sometimes written in less than 512 
bytes of data. When reading these sectors VG93 an error in the 
CRC. If the body of data has 512 bytes, then it's not terrible, 
the main that the disk was not defects. Other

matter if the data is less than 512 bytes - the remaining bytes 
will represent the third space (mostly code # 4E). A

sometimes this format is that the body on the last sector has, 
for example, 500 bytes, and after them comes the index hole, 
and therefore considers only those VG93 500 bytes, while the 
other 12 - those that are in memory. Therefore, in order to 
non-appearence Disk error is automatically Ignore when an error 
occurs in the CRC at reading the 10-th sector. But sometimes

a track format that the last sector
not ten, so do not be surprised to frequent
appearance Disk error and click Ignore.
Record on such sectors will be made to the presence of CRC, 
except when body of data is in the butt with an index

hole.
Hence the conclusion - it is better never use such discs.

A few words about working with MS-DOS


Better never to write in the name of the file
small letters and characters with codes 0 .. 31 and
128 .. 255, for the reaction of MS-DOS on these files is very 
strange. Never format / write a Windows-ohm, for it can happen 
that the cluster will have one sector or file header will have 
64 bytes (not 32) or FAT table is not

12-bit (the program has always believed that
on drives 12-bit FAT), and best of all
format here.



                            27.12.1998

                     Ukraine, Lviv



         TR-DOS/MS-DOS converter



Author: Volga Soft



  For yuzaniya copyist desirable
two drives (so convenient), or if there is no
two, and do one. In this case you
get high. Here are many permutations of the Cape of dos and 
sput-dos disk in the drive ... 

Copyist has the following features:

1) Copy files from MS-DOS on the TR-DOS and

   back.

2) Shipping type files MOD, XM, S3M, STM with

   conversion in the MOD and aspirated a total
   On a GENERAL SOUND.


   If GS is absent, it should not be on the
   treatment press button ENTER (download the file

   GS) because they all hang ...

3) View text files (or any
   bye files in text mode).

4) view graphic files in the form
   mate Spectrum screen length 6912

   and 6144 bytes.

5) Format the MS-DOS floppy disk in the form
   max: 800k, 720 k, 360k.

6) Create subdirectories, and climb on them.



                                22.09.1998