In the excelent Sean Young's documentation he doesn't mention anything close to this.
If anyone knows how to do this, I would like to know. TMS9918 in "screen 2" mode needs to use 3 tile banks.
Take a look for this. There is a link in Sean's webpage:
Hybrid bitmap modes:
http://www.stanford.edu/~thierry1/ti99/tms9918a.htm#hybrid%20bitmap
As I expected, Ricardo, the trick that the "100 dicas" book uses is quite crappy: it simply copies the first tile bank to the second and third banks. That is what I do, but I was looking for a hardware trick to do that.
Yeah, my memory failed me.
In the excelent Sean Young's documentation he doesn't mention anything close to this.
It does, I guess you just skipped this part. The trick is the AND mask 
Control register #4 which sets the PG address of the PG has a different
function in mode 2. Only bit 2, PG13, sets the address of the PG (so it's either
address 0 or 2000h). Bits 0 and 1 are an AND mask over the character number.
The character number is 0 - 767 (2FFh) and these two bits are ANDed over the
two highest bits of this value (2FFh is 10 bits, so over bit 8 and 9). So in
effect, if bit 0 of control register #4 is set, the second array of 256
patterns in the PG is used for the middle 8 rows of characters, otherwise the
first 256 patterns. If bit 1 is set, the third array of patterns is used in
the PG, otherwise the first.
Thank you, Ricardo. Now it is absolutely clear.
Expect next Karoshi productions to do strange things!
I have read that Space Invaders is registered, but only the name ...
Now, for Scramble there seems to be some strange restrictions! Something to do with a video tape!
Xbox Live Arcade, there could be a lot of popular games, well Super Cobra was popular too! There was even a contest to win some Jackets for the Atari 2600 VCS version of the game ...
MOOOOOOOOOOO
MOOOOOOOOOOO
Careful what you say Latok; I'm pretty sure that that is copyrighted too ;p
Careful what you say Latok; I'm pretty sure that that is copyrighted too Hey, it's a rhyme, so it's true!
And this too!
And this too!
And this too!
...
o_O
