It is currently Sun Oct 22, 2017 1:59 pm

All times are UTC - 7 hours



Forum rules


Related:



Post new topic Reply to topic  [ 83 posts ]  Go to page Previous  1, 2, 3, 4, 5, 6
Author Message
PostPosted: Mon Jul 11, 2016 1:54 pm 
Offline

Joined: Sun Sep 19, 2004 11:12 pm
Posts: 19115
Location: NE Indiana, USA (NTSC)
I'm assuming less animation because cels can't be streamed from a big 4 MB memory. With SuperDisc you're limited to the 64K VRAM, 128K work RAM in the console at $7E0000-$7FFFFF, and 256K work RAM in the system card at $808000-$87FFFF (mapped in mode $20 aka LoROM).


Top
 Profile  
 
PostPosted: Mon Jul 11, 2016 1:56 pm 
Offline
User avatar

Joined: Mon Sep 15, 2014 4:35 pm
Posts: 3074
Location: Nacogdoches, Texas
Oh yeah, that sucks... I didn't think the game would have used a unique cartridge, I would have thought it'd use the Super Disc Bios.

Actually, I just noticed something else... Is that game 3 player?


Top
 Profile  
 
PostPosted: Mon Jul 11, 2016 2:02 pm 
Offline

Joined: Sun Sep 19, 2004 11:12 pm
Posts: 19115
Location: NE Indiana, USA (NTSC)
The system card contains both the BIOS and the 256K external work RAM. It takes a lot longer to copy animation frames from the disc to the 256K RAM than it does to DMA data from the cart. But I suspect that this system card is why the DRAM refresh signal was brought out to pin 33 on the cart edge.

The Sega CD ended up having more RAM.


Top
 Profile  
 
PostPosted: Mon Jul 11, 2016 7:43 pm 
Offline

Joined: Thu Aug 28, 2008 1:17 am
Posts: 591
What year was this? Hudson/NEC started working on the Arcade Card for the PCE CD in late '92. That was 2304k if ram (18 megabits, 16megabits of it was DRAM). It was supposed to be released late '93, but delayed until early-mid '94.

_________________
__________________________
http://pcedev.wordpress.com


Top
 Profile  
 
PostPosted: Mon Jul 11, 2016 7:54 pm 
Online

Joined: Sun Apr 13, 2008 11:12 am
Posts: 6296
Location: Seattle
Date stamps on the ICs on this prototype are 48th week of 1991, so there should be roughly two years of Moore's law in-between, or somewhere around 37% the transistors.

Yeah, it's definitely weak. Six mebibit in late 1991 would be the extrapolation of 18 mebibit in early 1994.


Top
 Profile  
 
PostPosted: Mon Jul 11, 2016 9:26 pm 
Offline

Joined: Thu Aug 12, 2010 3:43 am
Posts: 1589
I looked up. Sega CD was doing 768KB of RAM (512KB for CD side, 256KB shared for both sides) and that was back in 1991. And that's in addition to the base system's memory (64KB RAM, 64KB VRAM, 8KB Z80 RAM).

256KB was weak regardless of what metric you use.


Top
 Profile  
 
PostPosted: Tue Jul 19, 2016 10:42 pm 
Offline
User avatar

Joined: Wed Dec 06, 2006 8:18 pm
Posts: 2801
d4s wrote:
Allow me to revive this thread and leave something here before returning to work on more pressing issues.

A couple of friends and me (under the pseudonym "Dieter von Laser") developed and released a new game for the Super Disc:
https://www.youtube.com/watch?v=99-v8lkoOdo


That's awesome d4s. Are you back from your hiatus now?

I'd love to see this running on the actual prototype as well. Maybe someone will make their own copy of the actual hardware too.


Top
 Profile  
 
PostPosted: Thu Jul 28, 2016 5:53 am 
Offline

Joined: Mon Jul 14, 2008 4:02 pm
Posts: 84
MottZilla wrote:
That's awesome d4s. Are you back from your hiatus now?


Thanks!
I guess you could say that I'm back, although my online activity will probably remain low.
Games like Jet Pilot Rising and Super Boss Gaiden just represent itches I couldn't refrain from scratching. ;)


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 83 posts ]  Go to page Previous  1, 2, 3, 4, 5, 6

All times are UTC - 7 hours


Who is online

Users browsing this forum: 93143, dougeff, lidnariq and 9 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group