How much RAM does the PS1 and Dreamcast have?

[Roger Kohli]

and could you fit that much in a mobile phone type device?

 

[Tagrineth]

PS1 has 1MB 'usable' and 1MB 'reserved' for things like frame buffer, sound...

So 2MB total.

Dreamcast has fully segmented memory, IIRC it has 16MB total.

 

[Roger Kohli]

Thanks for that.

Now IIRC Static RAM uses less power than Dynamic, but requires more space? I guess 2M of static RAM could still fit easily.

I'm just wondering what these Sammy/Sega boys might be cooking up.

 

[Grall]

Tag:

PS has 2MB main RAM, 1MB video RAM and 512k sound RAM, plus 32k CDROM buffer I believe. Thus 3.5MB in total (essentially). Saturn had all that, plus one meg sound RAM and 512k CDROM buffer I believe. One meg more of RAM in total.

Roger:

SRAM is costlier both in die area and power usage compared to DRAM. Why do you think the SRAM chips on the old slot-style CPU cartridges needed to be cooled once they started to hit around 250MHz speed?


*G*

 

[Sonic]

The Dreamcast has 16 MB main memory. I believe it was SDRAM as far as I recall. It had 2 MB for sound. The PVR2DC has 8 MB of VRAM with bandwidth reaching 800 MB/s.

 

[megadrive0088]

Playstation1:

2 MB main memory
1 MB VRAM
512k audio memory

*original plan for PS1 was for it to have *1* MB of main memory, but developers pushed for 2 MB.

Dreamcast:

16 MB main memory
8 MB video memory (not VRAM, its SDRAM afaik)
2 MB audio memory

*originally, Katata (Dreamcast) was to have 8 MB main, 8 MB video,
with the possibilty of 16 MB main, which Sega opted for.

 

[megadrive0088]

Saturn had (iirc)

2 MB main memory
1.5 MB video memory (for VDP1 & VDP2)
512k audio memory
perhaps another 512k for somethin else, (edit: CD-ROM buffer)

so either 1/2 MB or 1 MB more than the 3.5 MB of Playstation1.

 

[Sonic]

Katana was to have 16 MB, and it did, considering Katana was the final thing SEGA decided on. Katana is a machine that SEGA put in production that was named Dreamcast.

 

[Simon F]

The Dreamcast has 16 MB main memory. I believe it was SDRAM as far as I recall. It had 2 MB for sound. The PVR2DC has 8 MB of VRAM with bandwidth reaching 800 MB/s.

More correctly, the PVR CLX chip on DC had 8MB of SDRAM not VRAM.

IIRC, the latter is a DRAM chip that also has a 'serial' interface that can be used to feed a DAC.

 

[Sonic]

Thanks for correcting me on that, I knew I made a mistake somewhere.