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Info for prav8d |
Disk:
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The disk drive interface has a boot-rom which loads the DOS from the disc
in the drive.
The driver supports 2 versions of the disc interface:
- "low dos 8d" has a 256 byte boot rom and supports DOS v1.0 to v1.30 ("Apple 2" on dipswitch)
- "high dos 8d" has a 512 byte boot rom and supports DOS v2.10 and higher. ("Apple 2 v2" on dipswitch)
If you are using the standard prav8d driver you will need to type:
CALL #320
to start the boot procedure.
If you are using prav8dd (with the "BOBY" rom), then the disc is booted
automatically.
The Pravetz 8D uses Apple 2 compatible disk drives only and these
are supported by the driver.
Here is a brief listing of DOS commands provided by George:
options:
f - FileName (1-30 signs)
d - drive (one or two)
v - volume
a - beginning address
e - end adress
l - record length
r - record number
b - number of byte in the record
filetypes:
B - Basic program
C - Bynary file
T - Text file
M - Text file, created with Make command ( batch file:) )
commands:
DIR [1] [2] - not comment
INIT [,Vv] [,Dd] - formatting Disk (in first or second Disk Drive)
DOS [f] [,Dd], [,Vv] - writing Dos on the disk without formatting It. File f authomatically starts after booting
MAP [1] [2] - show chart of the disk.
SAVE f [,A,a] [,Ee] [,Vv] [,Dd] - Saves file on the disk. If missing parameter of the addresses A,E - saving Basic file in Memory
LOAD f [,Aa] [,Dd] [,Vv] - loads file in memory
MERGE - adding program in Basic to already exists in Memory
- -only for files B or C types. Loads file in Memory and start It. (RUN and BRUN together in Apple ][)
DELETE f [,Dd] [,Vv] - deleting file f
RENAME f1, f2 [,Vv] [,Dd] - ranaming last name of the file f1 with f2
* f [,Dd] [,Vv] - lock/unlock file
MAXFILES m - alowing up to m open files
VERIFY f [,Dd] [,Vv] - checks surface integrity of file
EXIT - leaving Dos
OPEN f [,Vv] [,Dd] - open file for read/write
CLOSE [f] - closing f. If there's no f pointed - closes all open files
READ f [,Bb] - points that will be reading of the file with command INPUT
WRITE f [,Bb] - writes in Text file
APPEND f [,Vv] [,Dd] - adding information in Text file. Always there's WRITE after It
POSITION f [,Rr] - allow writing or reading in Text file from r position
in Program mode using of the commands is:
10LPRINT CHR$(2); "MAXFILES 5"
e.g.
To load a program called "MONITOR" type:
LOAD MONITOR
often you will see a load address (it is the first number with # prefix).
Now type CALL #<number> to execute the program.
History and Trivia:
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The Pravetz 8D is a Bulgarian clone of the Oric Atmos.
It was produced between 1986 and 1989.
Thankyou to:
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George Dramcheff for the Pravetz information,
Fabrice Frances for the Oric information,