Official Overscan Invaders request.

[Official Ninja]

This is the official request thread for overscan invaders. 

[Petari]

You are very official type of gamer
Actually I started on joystick fix already. However, there are reasons why programmer self made not joystick option here. Used horizontal overscan with extensive Timer-B usage kills joystick command transfers (mouse commands too). Only single-byte keyboard commands work. All this is because special way how IKBD-ACIA-MFP-CPU system works.  Additionally, emulators emulate it not properly, and as I see even Steem SSE with 'True IKBD' emulation is not enough accurate.  Anyway, I have some progress, and need more tests on real HW to see is it possible at all.
Will be informed soon ...

[Official Ninja]

Sounds difficult.

Another Budgie game worth looking at is the Galxian clone: Quest for Galaxia.
It looks like it would be another very fun game in this genre but on my Mega STe no controls work at all.
Not even the keyboard.

[Anemos]

Some good Titles of Budgie UK

G-orb
Mr. Dig
Perils of Penfold
Crystal Caverns
Bert the Squirt

[Official Ninja]

Thanks for Galaxia.
Any word on Overscan Invaders or is it looking doubtful?

BTW- I played the ANDROM game at 16Mhz on my MSTE and it made the screen shake like mad.
8Mhz worked just fine so no biggie.

[Petari]

I tried a lot of things with Overscan Invaders. But nothing worked on real Atari . The problem is that there is not enough time to transfer joystick status packet - what is 2 bytes, in only 3mS available . From 20mS for 1 frame (as works at 50Hz), only 3 mS is available for it. Keyboard works because it needs only 1 byte. And is not reliable because interrupts are disabled 95% of time. Solution would be to speed up baudrate, but ACIA chip and IKBD chip have no other common baudrate. So, it seems that it is not possible.

[qq1975b]

knowing nothing about programming...but...using a buffer would help? will need more ram than 1MB I suppose.

EDIT: I meant buffer not cache