10 replies to this topic

[keystone_kelly]

how much does the 7800 graphics system differ from the 8 bit graphics system used by the 600XL in the ASM area ?.

was just wondering as I would like to try my hand at writing a Clone of a PC game from 83 called Bouncing Babies written by Dave Baskin for the 7800.

I know the hardware can handle it easily enough, but how difficult is compared to 5200 ?, are the DL DLL's the same layout ?.

thanks for any help

Dan

[GroovyBee]

Nope! DLLs are different on the 7800.

Start with the 7800 documentation here :-

http://www.atarimuse...chdocs-7800.htm

The ones from GCC are the ones to go by. There are mistakes ion the Atari docs.

EDIT: You might also find my utility a78psd useful to check your DLLs and DLs.

Edited by GroovyBee, Thu Apr 15, 2010 10:32 AM.

[keystone_kelly]

GroovyBee, on Thu Apr 15, 2010 10:27 AM, said:

Nope! DLLs are different on the 7800.

Start with the 7800 documentation here :-

http://www.atarimuse...chdocs-7800.htm

The ones from GCC are the ones to go by. There are mistakes ion the Atari docs.

EDIT: You might also find my utility a78psd useful to check your DLLs and DLs.

thanks for the info GroovyBee , sorry about the question I was on my way to work and did not have time to search the forums before I left , but the info you linked to was more than enough to get me started. Gave me everything I needed to know once again thanks your a life saver sir.

Dan

[DracIsBack]

keystone_kelly, on Thu Apr 15, 2010 10:22 AM, said:

was just wondering as I would like to try my hand at writing a Clone of a PC game from 83 called Bouncing Babies written by Dave Baskin for the 7800.

I remember that game! Had it on our first IBM PC ... my friend and I found it so twisted!

I haven't seen it in years! Look at those CGA graphics now!

Edited by DracIsBack, Thu Apr 15, 2010 4:38 PM.

[keystone_kelly]

DracIsBack, on Thu Apr 15, 2010 4:36 PM, said:

keystone_kelly, on Thu Apr 15, 2010 10:22 AM, said:

was just wondering as I would like to try my hand at writing a Clone of a PC game from 83 called Bouncing Babies written by Dave Baskin for the 7800.

I remember that game! Had it on our first IBM PC ... my friend and I found it so twisted!

I haven't seen it in years! Look at those CGA graphics now!

hey DracIsBack,

Yeah I loved that game and just thought hey that would make a great 7800 title

but yes it is a messed up idea I agree.

Dan

[GroovyBee]

There are several sprite examples in the programming section for the 7800. If you have any other questions about programming on the 7800 ask away.

Good luck on your project.

[keystone_kelly]

GroovyBee, on Thu Apr 15, 2010 5:01 PM, said:

There are several sprite examples in the programming section for the 7800. If you have any other questions about programming on the 7800 ask away.

Good luck on your project.

Well I do have one more question GroovyBee but it is not a 7800 question though, not to seem like an ass but is there any way you could add a graphics mode change to your sprite program ?. It is a great tool but i cannot get it to change from mode 160A for some reason. If not that is cool was just curious is all and again thanks for the help and the tool :

[GroovyBee]

keystone_kelly, on Thu Apr 15, 2010 5:42 PM, said:

Well I do have one more question GroovyBee but it is not a 7800 question though, not to seem like an ass but is there any way you could add a graphics mode change to your sprite program ?

Erm... I haven't publicly released a graphic mode program yet. I'm not sure what you are talking about unless you mean Gorf's PC tool?

I have a command line tool that takes windows BMP files and a *.ini file of instructions which I'm due to release soon(ish).

[keystone_kelly]

GroovyBee, on Thu Apr 15, 2010 5:47 PM, said:

keystone_kelly, on Thu Apr 15, 2010 5:42 PM, said:

Well I do have one more question GroovyBee but it is not a 7800 question though, not to seem like an ass but is there any way you could add a graphics mode change to your sprite program ?

Erm... I haven't publicly released a graphic mode program yet. I'm not sure what you are talking about unless you mean Gorf's PC tool?

I have a command line tool that takes windows BMP files and a *.ini file of instructions which I'm due to release soon(ish).

oops sorry you are right i am wrong my bad, I will ask Gorf about it later on.

Dan

[DracIsBack]

keystone_kelly, on Thu Apr 15, 2010 4:53 PM, said:

Yeah I loved that game and just thought hey that would make a great 7800 title

I loved it too. As a 12 year old boy with his first computer, I thought it was hilarious - in a sick sort of way.

[keystone_kelly]

DracIsBack, on Thu Apr 15, 2010 8:44 PM, said:

keystone_kelly, on Thu Apr 15, 2010 4:53 PM, said:

Yeah I loved that game and just thought hey that would make a great 7800 title

I loved it too. As a 12 year old boy with his first computer, I thought it was hilarious - in a sick sort of way.

true that, in this version I am going to replace the fireman with ambulance guys instead as well as make the building graphics in the activision style with the sunset looking horizon dunno yet some of this is gonna be easy and some is gonna be hard i can see that now with the way Maria handles things. but I would really like it to have at least a little better graphics than the original if i can get away with it just have to play with it and see, just aint the same as poking it in and USRing in to memory like regular 8 bits were in the days of old but I will try.

Dan