Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

Is the latest pcb and menu software hosted anywhere? That multicart seem awesome and I would like to build one but there is so many post in this thread spanning several years that it is getting confusing to piece up all the infornation needed. Thanks!

 

 

I'm curious about the details of his changes. I tried to read his scematics but I do not get what is connected to what. Its mostly the left part that I do not get. What I wonder is if 8k, 4k and 16k can be mixed or not. Is mdmc locked after while other bankswitching is still possible etc.... etc...

 

I do not have much time right now and in 3 days I'm on a vacation, so checking it out further will not happen soon.

 

 

I'm still hoping for this PCB to get produced and sold.

 

 

Most likely this thread is our common source.

 

 

I was thinking, by any chance... did you use some of the code in another project? Maybe I got part if your code another way.

We had some complications, but we just produced a first batch of plates.

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

New update! Now with 4K, 8K and 16K games!

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

New update! Now with 4K, 8K and 16K games!

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

So is anyone selling this current PCB version that handles both 4k and 8k binaries? I'd love to buy one.

First prototype board!

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

 

Arthur, como você fez com as tabelas ? Imaginei que em jogos de 8k vc deve ter pulado um numero da sequencia certo ?

 

Em cartuchos com jogos de somente 4k não entendi a necessidade de usar tabelas, vc pode simplismente usar o numero da seleção para tal, tb não entendi porque tem que ser apartir do 128, seja como for, bastava pegar o numero da seleção e adicionar 128 (acho que 127 para dar certo).

 

Voce manja de ASM ou só a parte do hardware ?

 

Abraço

Opa, não programo em ASM, talvez um dia, a implementação do F8 foi apenas um pico de inspiração! rsrsrs Abs

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

I'm glad it worked!

 

No, with games larger than 4k things complicates a lot. You can't just place existing roms of those games in the eprom. Instead, they need to be disassembled so that the part of the code that handles the bank switching can be modified to work with the multicart scheme.

You need to decide where the game will be on the eprom before modifying it, as it will be hacked to use specific banks of the multicart, and it won't work if you move it in a different position. Moreover, you can't lock the bankswitch as with 4k games after you select them from the menu, so you must also ensure that the rest of the code doesn't accidentally trigger a bankswitch that will cause the game to crash.

 

The design is flexible because allows mixing different size roms in the same multicart, but requires some knowledge of 6502 programming to hack the games larger than 4k to work with it.

I found a simple way to join 4k and 8k games with a little extra hardware and using the same program.

Thank you very much for your help, DrWho198, Blinky, and all who collaborate with this forum!

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

I found a mistake in the scheme I published a few days ago.

I forgot to represent line A0 on pin 2 of IC 74LS74.

 

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

My latest software on the linker dumps all of my cards, but I can not test compatibility for other cards.

I don't use the same software as Blinky does because he focusses on writing his own flash card. I on the other hand focus on dumping cards.

My software will detect what kind of bankswitching is used and will dump the complete rom.

 

But not much intrest has been shown by people, and at the moment I'm not working on it myself.

I think I helped with my last test!

I found a simple way to join 4k and 8k games with a little extra hardware and using the same program.

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

Yesssss! 4K and 8K games together!

 

https://www.youtube.com/watch?v=rrXZi2l3DFw&feature=em-upload_owner

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

I did some studies and tests, I was able to make the cartridge with menu having games of 8K and 4K.

The scheme is not completely adjusted, I used a V29C51002T instead of the emprom to speed up the tests.

arqsaida_old.bin

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

Alex_79 if I want to make a cartridge using 8K games, the procedure will be the same?

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

Alex 79, congratulations! I tested the atari! All games work perfectly! Including the reset button!

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

Alex_79, I did not know the new version of Stella, now worked well, later will test the Atari! Thank you!

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

Alex 79, see the result!

arqsaida2.bin

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

Added the safenet.bin, the latest games (Keystone, pacman 4k, qbert) do not work, the reactor jumps to the River Raid.

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

Curious, the menu is offset in relation to the game in a step 5, select the River Raid and access the Enduro, this is happening to everyone.

In the end of the menu items:

I want my mom open Pacman4k

Jaw Breaker open Qbert

Tac Scan restarts the menu

Keystone Kaper open Demon Attack

Lockn Chase open Boing

Pacman4k open Cosmic arc

Qbert open Defender

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

I may have made a mistake.

 

megacard.asm

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

I tested the "megacardmenu_v2_3--all_games_locked" with a set of games that works well, I made adjustments in relation to the amount of games and titles, something strange happens, the menu does not trigger the games correctly and Stella does not work properly.

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

I do not know how it is possible, but in two Ataris from different manufacturers, and with slightly different speeds, the menu of the program only works well at slower atari. In Brazil it is difficult to find the 74HCT27, I am using 74HC27. 74HC27 will be the cause of instability in faster atari?

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

Sorry, there was a mistake in the scheme.

Here is the corrected scheme (74HCT02).

[Cheap 2K/4K X-in-1 menu driven Multicart for Atari 2600]

Some games, such as Qbert, Keystone Kapers, among other, possibly interfere with bankswitch address of the circuit, I found a simple solution that corrects this problem.