PROTOCOL: Burst handshake (W =
1)
CONVENTIONS: This
is
a method
of
reading or writing current status.
OUTPUT: None (W
= 0), Burst status byte (W = I)
CHGUTL UTILITY
BYTE BIT 7
6
5 4
3 2
00
o
o o o
01
o o
o o
o
02
x x
x
03 UTILITY COMMANDS:
'S',
'R',
'T',
'M',
'H',
#DEV
04 COMMAND PARAMETER
SWITCHES: X---don't care
UTILITY COMMANDS:
'S'-DOS
sector interleave
'R'-DOS
retries
'T-ROM
signature analysis
'M'-mode
select
'H'-head
select
#DEV---device #
Note: Byte 02
is
equivalent to
'>'.
EXAMPLES:
"U0>S"
+CHR$
(SECTOR INTERLEAVE)
"U0>R"
+ CHR$ (RETRIES)
o
o
o
"U0>T"
(If
the ROM signature failed, the activity LED blinks 4 times)
"U0>MI"
= 1571
MODEL"U0>M0"
= 1541 MODE
"U0>
H0"
= SIDE
ZERO"U0>
HI"
= SIDE ONE (1571 mode only)
"U0>"+CHR$(#DEV),where#DEV
= 4 - 30
FASTLOAD UTILITY
BYTE BIT 7
6
5
4 3 2 o
00 o
o o
o
01
o
o o o o o
02 P
X
X
03-??
FILENAME
87
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