English Amiga Board - View Single Post - Which A500 SCSI interfaces are DMA-based?

Toni Wilen · 16 September 2009, 08:12

Perhaps by checking if there are 2 large chips, usually there is off-the-self SCSI controller chip + custom DMA controller chip.

There is also SCSI+DMA combo chips but I think they were introduced when A500 was expansion market was more or less dead already, for example 53C710 which was used in A4000T/A4091.

All Amiga IDE expansions are PIO-only

16 September 2009, 08:12	#4
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,540	Perhaps by checking if there are 2 large chips, usually there is off-the-self SCSI controller chip + custom DMA controller chip. There is also SCSI+DMA combo chips but I think they were introduced when A500 was expansion market was more or less dead already, for example 53C710 which was used in A4000T/A4091. All Amiga IDE expansions are PIO-only