Sujet : Re: Architectural implications of locate mode I/O and channels
De : rjs (at) *nospam* fdy2.co.uk (Robert Swindells)
Groupes : comp.archDate : 03. Jul 2024, 14:09:28
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <v63ii8$26l7v$1@dont-email.me>
References : 1 2 3 4
User-Agent : Pan/0.159 (Vovchansk; )
On Wed, 03 Jul 2024 05:52:07 GMT, Anton Ertl wrote:
Interestingly, this is one development that has not been repeated in
microprocessors AFAIK. If they did not want to spend hardware on a
separate DMA device, they just let the software use polling of the I/O
device. For the 8086 and 68000, I guess that patents may have
discouraged adopting this idea; when the patents ran out, they had
established an ecosystem with separate DMA devices. And of course for
the early RISCs there was no way to do that in microcode.
There was the 8089 coprocessor for the 8086, it was used in the Apricot
PC.
<
https://en.wikipedia.org/wiki/Intel_8089>
| Date | Sujet | # | | Auteur |
| 2 Jul 24 |  Architectural implications of locate mode I/O | 64 | | John Levine |
| 2 Jul 24 |  Re: Architectural implications of locate mode I/O | 38 | | Thomas Koenig |
| 3 Jul 24 |   Re: Architectural implications of locate mode I/O | 1 | | MitchAlsup1 |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O | 17 | | MitchAlsup1 |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O | 6 | | Lynn Wheeler |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O | 2 | | Lawrence D'Oliveiro |
| 5 Jul 24 |  Re: Architectural implications of locate mode I/O | 1 | | Terje Mathisen |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O | 2 | | MitchAlsup1 |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O | 1 | | Michael S |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O | 1 | | Lynn Wheeler |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O | 9 | | Bill Findlay |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O | 8 | | Michael S |
| 3 Jul 24 |  Re: Architectural implications of locate mode I/O | 1 | | Bill Findlay |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O | 6 | | Stephen Fuld |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O | 5 | | MitchAlsup1 |
| 4 Jul 24 | Re: wisdom of the ancients, was Architectural implications of locate mode I/O | 4 | | John Levine |
| 4 Jul 24 | Re: wisdom of the ancients, was Architectural implications of locate mode I/O | 2 | | John Savard |
| 4 Jul 24 | Re: wisdom of the ancients, was Architectural implications of locate mode I/O | 1 | | John Savard |
| 4 Jul 24 | Re: wisdom of the ancients, was Architectural implications of locate mode I/O | 1 | | MitchAlsup1 |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O | 1 | | Stephen Fuld |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 19 | | John Levine |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 9 | | Anton Ertl |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 6 | | Michael S |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 4 | | MitchAlsup1 |
| 4 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 3 | | Michael S |
| 4 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 1 | | MitchAlsup1 |
| 5 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 1 | | Joe Pfeiffer |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 1 | | Michael S |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 1 | | Robert Swindells |
| 3 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 1 | | John Levine |
| 4 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 9 | | Thomas Koenig |
| 4 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 8 | | MitchAlsup1 |
| 4 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 7 | | Thomas Koenig |
| 5 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 5 | | John Levine |
| 5 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 4 | | MitchAlsup1 |
| 7 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 3 | | Paul A. Clayton |
| 7 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 1 | | Lynn Wheeler |
| 7 Jul 24 | Re: patents, Architectural implications of locate mode I/O and channels | 1 | | John Levine |
| 5 Jul 24 | Re: Architectural implications of locate mode I/O and channels | 1 | | MitchAlsup1 |
| 3 Jul 24 | Re: Architectural implications of people who don’t understand locate mode I/O | 1 | | Lawrence D'Oliveiro |
| 5 Jul 24 | Re: Architectural implications of locate mode I/O | 24 | | Joe Pfeiffer |
| 5 Jul 24 | Re: Architectural implications of locate mode I/O | 21 | | John Levine |
| 6 Jul 24 | Re: Architectural implications of locate mode I/O | 18 | | Lynn Wheeler |
| 6 Jul 24 | Re: Architectural implications of locate mode I/O | 1 | | MitchAlsup1 |
| 6 Jul 24 | Re: Architectural implications of locate mode I/O | 14 | | Stephen Fuld |
| 6 Jul 24 | Re: ancient disks, Architectural implications of locate mode I/O | 7 | | John Levine |
| 6 Jul 24 | Re: ancient disks, Architectural implications of locate mode I/O | 6 | | Stephen Fuld |
| 6 Jul 24 | Re: ancient disks, Architectural implications of locate mode I/O | 5 | | John Levine |
| 7 Jul 24 | Re: ancient disks, Architectural implications of locate mode I/O | 4 | | Stephen Fuld |
| 7 Jul 24 | Re: ancient disks, Architectural implications of locate mode I/O | 3 | | Thomas Koenig |
| 7 Jul 24 | Re: ancient disks, Architectural implications of locate mode I/O | 2 | | Thomas Koenig |
| 7 Jul 24 | Re: ancient disks, Architectural implications of locate mode I/O | 1 | | Stephen Fuld |
| 6 Jul 24 | Re: Architectural implications of locate mode I/O | 1 | | Lynn Wheeler |
| 1 Aug 24 | Re: Architectural implications of locate mode I/O | 5 | | Lawrence D'Oliveiro |
| 1 Aug 24 | Re: Architectural implications of locate mode I/O | 4 | | Stephen Fuld |
| 1 Aug 24 | Re: Architectural implications of locate mode I/O | 2 | | John Levine |
| 2 Aug 24 | Re: Architectural implications of locate mode I/O | 1 | | Stephen Fuld |
| 11 Aug 24 | Re: Architectural implications of locate mode I/O | 1 | | Lawrence D'Oliveiro |
| 8 Jul 24 | Re: Architectural implications of locate mode I/O | 2 | | Lawrence D'Oliveiro |
| 8 Jul 24 | Re: Architectural implications of locate mode I/O | 1 | | Lynn Wheeler |
| 6 Jul 24 | Re: Architectural implications of locate mode I/O | 2 | | MitchAlsup1 |
| 6 Jul 24 | Re: Old printers, Architectural implications of locate mode I/O | 1 | | John Levine |
| 8 Jul 24 | Re: Architectural implications of locate mode I/O | 2 | | Lawrence D'Oliveiro |
| 1 Aug 24 | Re: Architectural implications of locate mode I/O | 1 | | MitchAlsup1 |