base:datasette
no way to compare when less than two revisions
Differences
This shows you the differences between two versions of the page.
| — | base:datasette [2015-04-17 04:31] (current) – created - external edit 127.0.0.1 | ||
|---|---|---|---|
| Line 1: | Line 1: | ||
| + | ====== Datasette ====== | ||
| + | The datasette is accessed via $01 (right, it's directly connected to CPU)\\ | ||
| + | You have 3 lines = 3 bits in $01:\\ | ||
| + | |||
| + | bit 5 is Cassette Motor Control (NOTE! It's low-active: 0 = on; 1 = off)\\ | ||
| + | bit 4 is Cassette Switch Sense: 1 = Switch Closed\\ | ||
| + | bit 3 is Cassette Data Output Line\\ | ||
| + | |||
| + | Make sure you don't mess up $00!\\ | ||
| + | Since bit 4 is input and bit 3 obviously output.\\ | ||
| + | Default for $00 on C64 is %00101111 ($2f)\\ | ||
| + | \\ | ||
| + | And in case you wondered: you READ from tape via the FLAG-line in CIA1:\\ | ||
| + | bit 4 in $dc0d.\\ | ||
| + | \\ | ||
| + | In BASIC $c0 (dec.192) is a tape motor control too...\\ | ||
| + | \\ | ||
| + | /enthusi | ||
base/datasette.txt · Last modified: 2015-04-17 04:31 by 127.0.0.1