MDCD性能到底比MD加强多少?

The Mega-CD specifications are as follows:[6]

CPU
The main CPU is a 12.5-MHz 16-bit Motorola 68000 processor. The Mega Drive has the same processor, but at a lower clock rate of 7.67 MHz (NTSC) / 7.61 MHz (PAL). In the combined system, both processors run concurrently for Mega-CD games, and the Mega-CD processor is idle for Mega Drive games.
多一个差不多是MD两倍速度的CPU，玩CD游戏的时候两个CPU同时工作

Graphics
Graphics Processor: Custom ASIC
Number of simultaneous colors on screen: 64 out of 512
Display resolution: 320 x 224 pixels and 256 x 224, video size from ¼ to full screen
Cinepak video compression scheme, implemented in software
Scaling and rotation effects

RAM
Program RAM: 4 Mbit (upgrade from the Mega Drive's 64kbyte)
Word Ram: 2 Mbit, this RAM is used as a bridge for the two processors
PCM samples: 512 kbit
CD-ROM data cache: 128 kbit
64 kbit Internal Backup RAM (for storing saved games, scores, etc. for CD games)
增加了非常多的内存

Storage
500 MB CD-ROM discs (equivalent to 62 minutes of audio data)
CD-ROM drive transfer rate: 150 kB/s (1x)
[edit]
BIOS
Size: 1 MBit
Used for games, CD player, CD+G and karaoke
Access time: 800 ms