ccasts2@prism.gatech.EDU (Sheldon Simms) (03/11/90)
I have been playing around (well attempting to anyway) with the cassette in port. Since nothing I do seems to work I wrote a short program to grab values from the cassette in port and write them to memory. All I get in memory is $FF's. I have come to the conclusion that somethings broken in the cassette in circuitry. Does anyone know how I can confirm that my cassette in is broken and then isolate the broken part so I can replace it. I know by looking at the schematic what items are involved, I just would rather replace one thing instead of the whole circuit. I'd appreciate any help that anyone can give Oh by the way, this is on an unenhanced //e in case it matters. Sheldon Simms ccasts2@prism.gatech.edu
cs122aw@ux1.cso.uiuc.edu (Scott Alfter) (03/11/90)
You might want to test your setup with the LOAD and SAVE commands in BASIC (not
while your machine is under the influence of a DOS!). Reboot, but reset before
the DOS can load in. Type a short program in and enter SAVE to write it to
tape. Next, enter NEW and LOAD to see if you can get it back off of tape. If
you can't get the program to load the first time, play with the tone and volume
controls on your recorder--full treble and half-volume are recommended initial
settings. If nothing you do will load the program in, either you have a bad
tape (don't use the el-cheapo ones that come 3 for $1.00 at K Mart or something
like that; use a quality tape like you would put music on), something's wrong
with your recorder (when I first set up my TI 99/4A (!) many years ago, the
recorder we initially intended to use with it wouldn't work--a really old (this
looked like early 70s) recorder might not work too well), or (hopefully this is
not the case) something is wrong with your computer. Experiment with different
settings and (possibly) different recorders, and if you still can't get it to
work, the Apple IIe Technical Reference Manual has a schematic for the entire
IIe; I'll draw a copy of the cassette circuitry in double Hi-Res and E-mail it
to you.
Scott Alfter-------------------------------------------------------------------
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