Commander X16

Here's my progress to date: https://github.com/Russell-S-Harper/EXPLORE Directory cx16-v2 has an example of dual 16-color screens, with swapping during the VBI, and 16-color line drawing routines, all using VERA. Even though it's written in C and implements clipping, it's still about 25% faster than...

To answer my own question: Is there any chance of getting some examples for the helpers? ... There is now! https://github.com/Russell-S-Harper/EXPLORE Directory cx16-v2 has an example of dual 16-color screens, with swapping during the VBI, and 16-color line drawing routines, all using VERA. Even tho...

Thank you for reviewing. I saw that document, too, and was disappointed that there wasn't any sample code! Using 4-bit mode: Here's a screenshot using increments of always 160 and occasionally 1. /* Just line helper mode */ VERA_FX_CTRL = 0x01; ... /* Occasionally increment by 1 */ VERA_ADDRx_H = 0x...

Okay, getting closer. Because VERA as defined in cx16.h doesn't reflect VERA FX, I redefined them below. It didn't say which DATA to write to, but I guessed DATA1 and now it's drawing something, but like showing 15 points instead of 30, and it might be corrupting memory because some diagnostic strin...

Is there any chance of getting some examples for the helpers? I'm finding the documentation very hard to follow. For example, I'm trying to use the "Line Helper" but it's like every time I read the documentation I find some other missing detail, and then I'm not sure where it fits in the s...

I'm reading the FX documentation but it's very confusing. The version I have was downloaded January 2023, I'm pretty sure it's later than 0.3.1. This is the code I have. It's meant for 4-bit mode (a.k.a. 16-color). It doesn't work, just outputs some @ characters. Not what I'm looking for! I have man...

I'd like to be able to use 4-bit or 16-color with TGI. I have some existing line drawing functions, but the built-ins for TGI run approximately 3× faster, so would like to take advantage of them if possible. In C, this will configure VERA to 4-bit mode, so enough for two screens, and have it display...

Some optimizations were made to masking and extended memory handling. So now down to 0.66 s/frame, but still a long way from a 0.20 s/frame goal. I'm thinking about using VERA to render filled polygons, so instead of drawing from near to far and using masking, going in the opposite order, far to nea...

I managed to optimize the Basic Demo to improve the performance from 1.36 s/frame to 0.91 s/frame. While better, it's still far from the 0.20 s/frame goal. Add in a real scenario as in the DOSBox "Explore" Demo and achieving 0.20 s/frame is likely going to be very difficult. At the core of...

Thanks for confirming that the speeds are comparable, I can look into optimizing. With VERA interfacing and extended memory, the CX16 code is already more complex than the DOSBox demo. It would be helpful to have a profiler to know what to optimize first. Both were written mostly in ANSI C. The DOSB...