Table 3.2 SCU system specifications

No	items	specifications	Remarks
1	DSP	・ 32bit × 32bit → 48bit ・ 14MHz ・ Program RAM 32bit × 256word ・ DATA RAM 32bit × 64word × 4 ・ With DMA instruction
2	DMA	・ 3ch for CPU, for DSP 1ch , 3 levels, 1 set of stacks , can be activated by interrupt , with indirect mode
4	Interrupt control	(2ch) and ・ Interrupt control from external terminal
5	A-bus control	・ A-bus (External bus) bus sizing , wait control , burst size setting , refresh control
6	B-bus control	・ B-bus (Internal bus) control	・ VDP1, VDP2, SCSP only