Controlling the VP415 via Computer

SCSI Communications

VP415 Baud Rates

Sending F-Codes

Using F-Codes in CAV

Using F-Codes in CLV

F-Code Acknowledgements

LVInfo with CAV Disc

LVInfo with CLV Disc

LV Information Overlay

Domesday Control with CAV Disc

Domesday Control with CLV Disc

Domesday Control Inverse Video

LVStatus with CLV Disc

LVStatus with CAV Disc

VP Communications

This section is all about programming and controlling the VP415 using a computer. The computer in question is of course the BBC Master AIV, although it needn't be, because many of the examples here are done using a serial connection, which doesn't require the SCSI interface, or VFS, or even a BBC micro, if you wanted to use some other machine!

Getting going with communicating via RS232 comes under the heading of Domesday 2010 because it was in that configuration of my Domesday Machine that I first tried it out. So, if you need a refresher on how we connect to the VP415 via serial and how to transmit and receive, take a look here.

The first picture set above shows how we can control the VP415 from the computer using SCSI, which is the usual method employed in the Domesday System, the second shows how to select the VP415's baud rate, the third shows how to send F-Codes to the player via a variety of methods, the fourth shows how a CAV disc can be controlled with F-Codes, then a CLV disc.

Set 6 is all about the player's responses back to the computer, then there are two sets on using a utility I have written to display information about the disc being played, which I've called "LVInfo", and a short set about calling up the information displays on the VP415, three sets showing my "Domesday Control" utility working with CAV and CLV discs, and an inverse video option, and finally two sets on a utility I wrote to interpret the disc and player status bytes called "LVStatus".

I hope you will click on the picture links above to learn more about using your Beeb to operate the Domesday LV-ROM player.

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