Search found 633 matches

by Mobsie
Thu May 09, 2013 3:43 pm
Forum: Games programming
Topic: WIP: Reversi
Replies: 170
Views: 120875

Re: WIP: Reversi

As i remember Kurt set the screen active bit OFF then write all to the VDP RAM, and when all is finish turn on the screen.
I really think you only have this timing problem outside the VBL.
by Mobsie
Thu May 09, 2013 3:22 pm
Forum: Games programming
Topic: WIP: Reversi
Replies: 170
Views: 120875

Re: WIP: Reversi

but in the VBL when the TMS has nothing to display, you can write as fast as possible. After an address is written, the VDP needs 2uS to retrieve the data. Between reads, the VDP needs 8uS to get the next piece of data. And now, the variable part - the VDP only provides a CPU access window from ever...
by Mobsie
Thu May 09, 2013 3:18 pm
Forum: Games programming
Topic: WIP: Reversi
Replies: 170
Views: 120875

Re: WIP: Reversi

speed of copy to vdp can be the source for the error, this can be with my software also because i don't test on real hardware on the moment. The way the VDP works is a sort of a "best effort" approach. When you write data to the data port, the VDP will copy that data to VRAM when it's ready to, and ...
by Mobsie
Thu May 09, 2013 2:40 pm
Forum: Games programming
Topic: WIP: Reversi
Replies: 170
Views: 120875

Re: WIP: Reversi

yes, in the map-demo and in the game i write now i access the register or move to VDP memory only in the VBL. I also use then the VBL for set timing flags for the main loop. My source code part for the VBL is strange and long because i use unrolled loops etc., but then i enough time to do all the VD...
by Mobsie
Thu May 09, 2013 2:08 pm
Forum: Games programming
Topic: WIP: Reversi
Replies: 170
Views: 120875

Re: WIP: Reversi

Hi Carlsson,

most TI99/4a and Memotech programmer i know never touch the VDP in a scan-line.
When is absolute needed then disable before the interrupt and turn on after again.

Some emu`s fix VDP trouble`s like for example the 8-sprite error in Half-Bitmap-Mode, but real hardware not.
by Mobsie
Wed May 08, 2013 5:23 pm
Forum: Games programming
Topic: WIP: Reversi
Replies: 170
Views: 120875

Re: WIP: Reversi

Hi Carlsson,
i like your Work. Great Game.
by Mobsie
Tue May 07, 2013 4:57 pm
Forum: Homebrew software and hardware (excluding games)
Topic: Cart for Homebrews...
Replies: 49
Views: 46644

Re: Cart for Homebrews...

Yes we Need this like the multicard for the colecovision.
I speak with atarimax about that, wait for answer.

Before i think about to buy an eprom Simulator, but is very Big and
expensive.
by Mobsie
Tue May 07, 2013 3:19 pm
Forum: Games programming
Topic: WIP: Reversi
Replies: 170
Views: 120875

Re: WIP: Reversi

Hi Carlsson, yes i read also $11 for my game. I do the quick and dirty method at the moment. (Later i will use only JMP because it use only 3 cycles, both jump use 6 together, the jsr and rts use 6 each!) MovePlayer LDX $11 ; Joy CPX #%01000101 bne MovePlayer1 jsr trap2 rts MovePlayer1 CPX #%0100110...
by Mobsie
Sun May 05, 2013 7:26 pm
Forum: Games programming
Topic: WIP: Reversi
Replies: 170
Views: 120875

Re: WIP: Reversi

Yes, this is funny.
I hope for the other we don`t must waiter another 30 years :lol:
by Mobsie
Sun May 05, 2013 7:24 pm
Forum: Games programming
Topic: Next project
Replies: 35
Views: 36932

Re: Next project

This is great idea,
can you send me the sceenshot from the Skiing game? And what Astro Fighter you mean? I found different versions.

Carlsson:
I work on some game`s too, and i am try to finish.