Quick question, but I've had difficulty finding the information from Google: what's the (approximate is fine) baud rate of the Dragon 32's cassette interface?
Cheers.
Cassette Baud...
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Re: Cassette Baud...
According to Dragon User Magazine Issue September 1985, page 19 it's 1500 Baud.
Re: Cassette Baud...
Really? Seems slower than that to me.
Cheers mate. Much appreciated.
Cheers mate. Much appreciated.
Re: Cassette Baud...
The symbol rate is variable, since it takes only half as long to transmit a "1" bit compared to a "0" bit. I wonder if the quoted baud rate accounts for this (perhaps being an average), or whether it even makes sense to have a single value rather than a range?
Re: Cassette Baud...
Really? I always thought it was 1 cycle of 1200 or 2 cycles of 2400 for each bit so that the bit time is the same.Sarah wrote:The symbol rate is variable, since it takes only half as long to transmit a "1" bit compared to a "0" bit. I wonder if the quoted baud rate accounts for this (perhaps being an average), or whether it even makes sense to have a single value rather than a range?
Cheers.
Phill.
Re: Cassette Baud...
This is fully explained on page 213 of Inside The Dragon.
Re: Cassette Baud...
Yep!prime wrote:Really?Sarah wrote:The symbol rate is variable, since it takes only half as long to transmit a "1" bit compared to a "0" bit. I wonder if the quoted baud rate accounts for this (perhaps being an average), or whether it even makes sense to have a single value rather than a range?
Try filling a large area of memory with $FF and then an equal amount with $00; it's easy to hear that the $FF blocks are half the length of the $00 blocks!
Well spotted...zephyr wrote:This is fully explained on page 213 of Inside The Dragon.
Presumably Brian Cadge gives a lower approximate figure in his article to adjust for overheads."the effective data transfer rate from Dragon to cassette recorder is 1800 bits/second as, on average, there will be an equal number of ones and zeros recorded for a program or data file"