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Fix readme format

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Gregor Riepl 2022-08-20 18:49:50 +02:00
parent c9bc6b9207
commit 71d7461031
1 changed files with 8 additions and 6 deletions
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14
README.md
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@ -28,12 +28,12 @@ a 9V supply rail.
The other pin mappings are as follows:
| PET pin | ESP pin | Direction | Cassette #1 internal | Cassette #2 internal |
|----------------|---------|-----------|----------------------|----------------------|
| Cassette Write | RXD | PET->ESP | VIA PB3 | VIA PB3 (same as #1) |
| Cassette Read | TXD | ESP->PET | PIA1 CA1 | VIA CB1 |
| Cassette Motor | CTS | PET->ESP | PIA1 CB2 | VIA PB4 |
| Cassette Sense | RTS | ESP->PET | PIA1 PA4 | PIA1 PA5 |
| PET pin | ESP pin | Direction | Cassette 1 external | Cassette 2 internal |
|----------------|---------|-----------|---------------------|----------------------|
| Cassette Write | RXD | PET->ESP | VIA PB3 | VIA PB3 (same as #1) |
| Cassette Read | TXD | ESP->PET | PIA1 CA1 | VIA CB1 |
| Cassette Motor | CTS | PET->ESP | PIA1 CB2 | VIA PB4 |
| Cassette Sense | RTS | ESP->PET | PIA1 PA4 | PIA1 PA5 |
A suitable serial signal (RS-232-like) must be generated/decoded in software.
Make sure that you don't access the cassette port #1 while the adapter is
@ -51,6 +51,7 @@ http://www.6502.org/users/andre/petindex/local/pet-io-2.txt
| Start | +3V | |
| End | | -3V |
```
_ ___ ___ ____
H | | | | | |
| | | | | |
@ -62,6 +63,7 @@ L |_| |_| |___|
| | | | | |
-3 _| |___| |___| |____
S 1 1 0 1 1 0 0 1 E
```
## PET RS232 Driver