Steve Fosdick

Returning to an old thread is this with the Internal filter on or off? I have just been looking at the sound code and it seems it is feeding integer...

Recording the output from B-Em with audacity gives this:  This is on Linux and is recording the "monitor" output from pulse audio. It was certainly quiet - I had...

There is nothing wrong with trusting the programmer. An assembly language programmer will obvious know about wrap around and sign changing. On the other hand the assembler has the potential...

Also +1 for ZornsLemma's point about calculated values - this is where they are most likely to overflow without the programmer being aware.

I don't have a Mac either, let alone a Power PC one. Looking at the backtrace it appears an exception is being thrown. As to why unwinding the stack gets...

I think I can reproduce this, though I am not completely sure what I am listening for, and I think the change in behaviour occurred with commit https://github.com/stardot/b-em/commit/8e92d061dce18b4118b99dabea302553389502e3 It is...

Ok, for reference, here is an MP3 file of the test playing on a real BBC Model B. [b-em-issue219.zip](https://github.com/stardot/b-em/files/13943752/b-em-issue219.zip) It's a ZIP file because GitHub won't let me upload an...

Listening to the two versions, the most obvious difference is that the newer version of b-em has some random sounds that are not in the correctly played version. As an...

Thinking that the point at which the emulated SN76489 latches the data value is likely to be at the core of this issue, I though it was worth writing a...

Looking at the source above, I think the problem is slighly different. The datasheet specifies that it takes the SN76489 "approximately" 32 (4Mhz) clock cycles to update the internal registers...