32MB RAM on Dreamcast (Mod)

[EduardoKmus]

Curious modification, to expand the Ram memory of the Dreamcast... there is still not much software that takes advantage of this, but undoubtedly it will be the indie developers who take advantage of it.

[Ro Magnus Larsson]

This will be useful for OpenBOR games and higher Emulations like Game Boy Advance or Saturn

[kof888]

I have got a 32M version of dreamcast. I am currently making a kof98 that supports the 32M version. The test game is running very fast. If you are interested, you can PM me. After the test, I will upload one.

[DCSLP]

Does this help multiplayer Unreal Tournament?

[megavolt85]

с чего бы? для Unreal Tournament надо сервер писать, а не ОЗУ докидывать

[kof888]

I made a kof98 that needs 32M memory to run,

welcome to test, it can be burned or run on gdemu or mode

Warning, dreamcast with 16M RAM does not work

https://mega.nz/file/0aw0nKZB#BI-jp8fIkD...EgN05MjtDY

[aldair]

(30.09.2020 18:14)kof888 писал(а):  I have got a 32M version of dreamcast. I am currently making a kof98 that supports the 32M version. The test game is running very fast. If you are interested, you can PM me. After the test, I will upload one.

Can this memory be found on alixpress?

[kof888]

(12.10.2020 15:14)aldair писал(а):  Can this memory be found on alixpress?

I don't know, you can try

IS42S32800J-6TL

must buy -6TL

don't buy -7 or -8...

[kof888]

The third 32M memory version game I uploaded

Knights of Valour The Seven Spirits

Warning, it can only run on a dreamcast with 32M memory. After decompression, the cdi is only 50M (so it cannot be burned). Please use usb gdemu usb to test on a 32M memory Dreamcast

https://mega.nz/file/0GoiTZja#jNwgPBkXUW...LldhuY6PdA

video test：
https://www.bilibili.com/video/BV12K41137xi/

[SWAT]

@kof888
What improvements does give 32MB of memory in these games?

[kof888]

I put some frequently used files and some relatively small and scattered files in the 16M memory added later. When the game needs to read these files, they can be copied directly from these memory, so that the game can run faster

For example, in this game, when the A+C button is aerated, the game needs to quickly read more than a dozen files to the memory.

If it is burning cdi, the pause phenomenon is obvious
Please watch this video. The test of burning cdi is paused from 4 minutes 03 seconds to 4 minutes 06 seconds.
https://www.bilibili.com/video/BV1WK41137Vq/



If you use mode, there will be a pause. Use mode to test
https://www.bilibili.com/video/BV1tT4y1M7b2/
Once at the 48th second and once at 1 minute and 26 seconds, there will be a short pause of about 1 second.


The following video is a test with 32M memory, using mode
https://www.bilibili.com/video/BV12K41137xi/
It is released directly from 1 minute and 26 seconds, and there is no pause at all.


I'm just giving an example, other games should also have good results


The only problem encountered at present is that this 32M bios will restart the host when it encounters playing sfd files

[SWAT]

Simply put is used as a data cache? I got it, thanks.

[kof888]

Of course, it can also be used for other purposes, but it feels good to cache

[linerty]

Хорошая тема. Доберусь, сделаю мод. Давненько хотел добавить памяти, не спрашивайте зачем. Но раз есть уже что и куда паять и какую память использовать, то поищу микросхемку. Старых планок памяти полно. Даже где-то видел нужную.
Оригинал статьи.

[aldair]

(15.12.2020 07:57)kof888 писал(а):  I put some frequently used files and some relatively small and scattered files in the 16M memory added later. When the game needs to read these files, they can be copied directly from these memory, so that the game can run faster

For example, in this game, when the A+C button is aerated, the game needs to quickly read more than a dozen files to the memory.

If it is burning cdi, the pause phenomenon is obvious
Please watch this video. The test of burning cdi is paused from 4 minutes 03 seconds to 4 minutes 06 seconds.
https://www.bilibili.com/video/BV1WK41137Vq/



If you use mode, there will be a pause. Use mode to test
https://www.bilibili.com/video/BV1tT4y1M7b2/
Once at the 48th second and once at 1 minute and 26 seconds, there will be a short pause of about 1 second.


The following video is a test with 32M memory, using mode
https://www.bilibili.com/video/BV12K41137xi/
It is released directly from 1 minute and 26 seconds, and there is no pause at all.


I'm just giving an example, other games should also have good results


The only problem encountered at present is that this 32M bios will restart the host when it encounters playing sfd files

Could it be used on aes4all?
For me it would only serve for this emulator!

[aldair]

(30.10.2020 18:11)kof888 писал(а):  

(12.10.2020 15:14)aldair писал(а):  Can this memory be found on alixpress?

I don't know, you can try

IS42S32800J-6TL

must buy -6TL

don't buy -7 or -8...

https://pt.aliexpress.com/item/100500132...web201603_

[kof888]

Need to recompile aes4all.........