Commodore RF512C - Page 27

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B·F (BIOCK· FREE)
Function
Fo rm at
I B AS IC
Syntax
T his direct command can make specific block free
by going to update the BA M.
Or, it do the inverse work of BL OCK·ALL OC A TE .
st ri ngS = " B·F " ;drive .. ; track" ;bl ock"
This command must be sent through command
channel.
The dr i ve" is always zero in single drive system .
T he range of t rack" and block" please refer to
PRI NC IPLE S,
B·R (BIOCK· READ)
Fun ction T his direct command can r ead specific blo ck of
For mat
Sy nt ax
da ta on t he .
stringS = "B·R" ; dr i ve";channel .. ; track";block"
Th is command must be sent Ihrough command
channel and coopera te with data channe l to
read di sk da ta.
The d ri ve" is always zero in single drive system .
The r ange of tr ack" and block" please refer to
PRIN C IPLES .
The channel" must be l ong to some opened data
channel.
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