Rhodes CHROMA - CASSETTE; Interface Notes; Cassette Operations (Load;Save)

CASSETTE
INTERFACE NOTES
1. During cassette operations, turning off the
cassette or pressing any one of the four cassette inter-
face switches on the Chroma will abort the operation.
During a LOAD ALL, the progtam number will show
the number of the program being read. if the abart
occurred during a program packet, or the number of
the program about to be read, if the ahart occurred
between packets.
2. At the end of every cassette operation, the
cassette is turned off by the Chroma. Ta reenable
the cassette's Qwn controls, sîmply press the stop
switch on the cassette. The Chroma detects this and
immediate1y reenables the cassette for rewinding or
whatever.
3. The LOAD ALL function makes no assumptions
about which programs it is to load. It simply follows
the instructions on the cassette. The SAVE ALL
puts a program number 1 packet at the beginning and
stop packet at the end of the recording, and these tell
the LOAD ALL where to start and stop. If an errar
occurs during a LOAD ALL, and the tape was record·
ed with gaps between the cassette, the user may press
LOAD ALL again to continue with the next packet.
However, if the user manipulates the cassette con-
traIs, the Chroma will detect this and assume that the
user backed up the cassette one packet, sa the
Chroma backs up the program number too. This
allows retrying the offending packet. If the user
backs up
the tape up to the beginning, the Chroma
will at first assume that the tape was backed up one
packet only, but the program number 1 packet will,
what occurs at the beginning of the sequence will
override
this assumption.
[LOAD ONEI
Attempt ta read one packet from the cassette.
If an errar accurs, the display will show "Error."
If a program packet is read, it will be loaded into the
current program (pragram 0) so that it cùn be ùudî-
tioned, and possibly stored someplace. If a stop
packet Îs read, the display will show "OFF," and if
a
program number packet is read, the display \ViII
show "Pr no" followed by the program number.
The lock switch has no effect. If a subroutine packet
i5 read, the display will show "Subr."
ISAVE ON El
Write one program packet to the cassette from
current program with four seconds of space before
it.
[LOAD ALLI
Begin reading packets fram the cassette ioto the
Chroma. A program number packet \vill set the pro-
gram number appropriately. .-\ stop packet will
terminate the operation. .-\ program packet wîll
cause the pragram ta be written ioto the memory
location specified by the current program number.
and then causes the program number to be incre-
mented, with wraparound from 50 to 1. If the lock
switch is locked, program packets will be checked
for errors, but not placed in memory. If an error
occurs, the program number display wiIi show the
number of the program about to be read, which is
usually one greater than the number of the prog-ram
that contained the error. If a subroutine packet i~
encountered, the cassette will stop, leaving the
subroutine in the cassette buffer where it can be
executed with [SET SPLIT], [25].
[SAVE ALLI
Write a program number l packet, 50 program
packets containing programs l through 50, and a stop
packet to the cassette. About four seconds of space
will be placed between each packet, unless the lock
switch is locked, in which case no ~pd,'es will be pro-
vided.
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