spencer@well.UUCP (Randal Spencer) (11/25/86)
So what does all this mean? I am not thinking really hard about getting a
DMA hard disk because as I understand it, if I want to load a program into
fast memory I am not going to be able to do it using DMA anyway! Is this
not true? Maybe it could be DMA'ed into the chip_memory, and then be
moved by the CPU to fast_memory, without having to worry about the interrupts.
Is this true?
More important than this is, if DMA _is_ important even if you _don't_
care about loading data in for real-time stuff (like loading sounds while
the sound chip is playing the old data, or loading animation objects), than
is the C-LTD board DMA? Not at that price I would think not. But the PAL jr.
is not available with a developer discount. The MicroBotics _can't_ be
DMA, and that leaves who? ASDG? Do they have a DMA hard disk coming out?
Does anyone else? I just can't afford $1500 and was about to plunk down
the $995 (or so, love that Amiga credit card) and get the C-LTD SCSI
board and drive. Isn't this going to be a fine disk for programming with?
It still passes the bus don't it?
--
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Randy Spencer P.O. Box 4542 Berkeley CA 94704 (415)284-4740 ...well!spencer
I N F I N I T Y spencer@USCVAXQ.bitnet
Now working for |||||||||||::::... . . spencer@usc-oberon.arpa
But in no way |||||||||||||||::::.. .. . .
Officially representing ||||||||||||:::::... ..
s o f t w a r e
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-hamilton@uiucuxc.UUCP (11/26/86)
spencer@well says: > So what does all this mean? I am not thinking really hard about getting a > DMA hard disk because as I understand it, if I want to load a program into > fast memory I am not going to be able to do it using DMA anyway! Is this > not true? Maybe it could be DMA'ed into the chip_memory, and then be > moved by the CPU to fast_memory, without having to worry about the interrupts. > Is this true? no, you're thinking of the amiga custom chips' DMA channels, which are limited to CHIP memory. an outboard DMA channel would not be so limited. even without a disk drive, an outboard DMA channel might be useful for FAST to CHIP (and vice versa) ram transfers. > is the C-LTD board DMA? Not at that price I would think not. why not? how much does DMA add to the cost? $50? wayne hamilton U of Il and US Army Corps of Engineers CERL UUCP: {ihnp4,pur-ee,convex}!uiucdcs!uiucuxc!hamilton ARPA: hamilton%uiucuxc@a.cs.uiuc.edu USMail: Box 476, Urbana, IL 61801 CSNET: hamilton%uiucuxc@uiuc.csnet Phone: (217)333-8703 CIS: [73047,544] PLink: w hamilton