Hardware programmable timers

[XorA]

Most OSes switch to polling mode in those circumstances.

[Dave]

That doesn't fit for devices that can issue 1000+ interrupts per second. Why bottleneck them to when you feel like polling them?

[XorA]

That doesn't fit for devices that can issue 1000+ interrupts per second. Why bottleneck them to when you feel like polling them?

Erm, this is exactly how most OSes deal with high bandwidth devices. You think your devices are fast, try 100G network interfaces.

[Peter]

Any chance to post a timing chart for the Q68 extension bus? HD/ED floppy interface seeks SMSQ/E DP8473V floppy driver remapping to extension bus and details for logic.

I can not just take a photo, since that timing chart does not exist. I haven't dealt with the bus timings in a decade, so researching and documenting them is more work than I currently would like to do. Sorry that I postponed and eventually forgot it. The mapping is documented in the Q68 manual though, and others had no problem with it.

Unfortunately I have little interest in a Q68 floppy controller, and I don't believe drivers will be written, so my motivation is not the best.

If you don't wish to post a picture of your QL sound card, okay. I don't understand what the Q68 bus timings have to do with that.

[Peter]

By the way, the "68K bandwidth theoretical best-case" table looks wrong to me. E.g. the 68060 bursts 16 Bytes in 5 clock cycles maximum.

[Derek_Stewart]

Hi,

I do not see the point of of a disk interface on the Q68, since the the media : new HD Disks are not made in any quanities, with respect to ED Disks, I havd never seen them in any quantities.

So hardware would be interesting to look at, but why... at present I can use a 256 MB FAT partition on a SD Card which can hold Disk Images of HD, ED formats.

With regards to the Sound Card, I would like to see pictures of the card, which sounds excellent in the concept and design.

I would like to buy one.