Well, I will try to explain that I have done.
I am using a Pic microcontroller of 32 bits, one ov7670 camera without fifo al422b (dram of 3 Mbits), and 2 chips al422b.
I am using the camera with Vga (640 x 480) resolution, then using a camera configuration RGB565, it would be necessary almost 5Mbits of dram to save the bits of the image, for such reason i am using 2 chips al422b (dram of 3Mbits), each chip al422b save bits of odd and even rows, I designed a small circuit using nand port and flip flop D to save the bits inside the al422b automatically.
About the software, I made it only using the assembler language of the Pic32, I read the datasheet of the Pic32, of the al422b and of the OV7670, with that information i made the code Assembly to read the bits of the image from the al422b, and the Pic32 send it to computer using rs232, with the image in the computer i verify the work.
There are many details about the hardware and software to explain here because it could be extense here.
Now I have dificulties to get the adequate colors, the OV7670 have many commands, to understand them take time because it is test-observation several times.