Tandy 1000 Soundchip revisited: ASM programming example

[je3f0o]

Hi what is your editor ?

i googled over eight hours but no luck :(

I have installed dosbox and assembler on my windows 7 machine but i have no idea how to use c++, c++11, c++0x, djgpp etc... Because i was never used these languages

Can you make a tutorial how to install this editor and prepare to write codes for beginners?

If you are busy please email me bkb_enemy@yahoo.com what should i do. i can work on linux.

I really want to learn this. BTW very nice vidoes :D

[Bisqwit]

@je3f0o Huh, how can your message be flagged spam already, having been posted only 5 minutes ago?

Also, you wasted eight hours for something that is resolved by a simple question. The editor is something I created. It is not publicly available. You don't need my editor to be able to program. You just need _a_ editor. It might be MS-DOS Editor, it might be QEdit, it might be Borland C++ 3.1 IDE, or RHIDE, or anything. As for DJGPP or better yet, Mingw32, look into their installation instructions.

[je3f0o]

@Bisqwit Ok thanks :) very cool editor. very good job

[FreeFireFull]

Awesome

[RJLeffmann]

Nicely done! The tunes sound like they are coming right out of the real thing.

[8bitbubsy]

Ahh I see, I read some of the comments in the asm now, mentioning the high lower limit of the sound chip. :/

[RJLeffmann]

@8bitbubsy Oh hi bubsy.. it's a small internet :P

[8bitbubsy]

Sounds good, and the code looks clean and good as always :-)

Shame about the lack of triangle for the bass, can you somehow use a short triangle waveform based on periods, and use that? Or can't you send data that fast to the PC speaker controller?

[Bisqwit]

@8bitbubsy All ways that would supposedly enable producing triangle wave would be the same methods that would enable any arbitrary PCM-like sound. I may cover PWM (the method that enabled playing MODs through the PCM speaker) in a later episode, but for now I won't touch it; in any case, it was CPU-intensive and out of question for Tandy 1000.

[MobyGamer]

@Bisqwit Actually, it wasn't out of the question -- I've personally output 4-bit PCM audio by altering the volume register at 8KHz on a Tandy 1000.

Getting this to happen with other things going on, yes that's more difficult, but not impossible. You might have to precompile your music.

[Cloudschatze]

@Bisqwit Tandy's "PSSJ" chip, found in the later 1000-series systems, incorporates a SN76496-compatible megacell, but also includes a fourth sound channel option with selectable pulse width and waveshapes (pulse, ramp, triangle). In addition, the PSSJ allows for frequencies as low as 54.62Hz. Would be interesting to see if either feature can be incorporated into your program. Check out the 1000 TL Technical Reference guide for more information (search for "tvdog tltech.zip").

[Bisqwit]

@Cloudschatze Thanks for the feedback! Unfortunately, DOSBox, the PC emulator in which I recorded this video, does not support the PSSJ chip, so I have no way of testing it or record its output, even if I figured out how to program that chip.