Re: Titan Accelerator //e

[Patrick Schaefer <pa.schaefer@fz-juelich.de>]

Mitchell Spector wrote:

>     According the (photocopied) manual that came with my Titan board,
> switches 1, 2, 3 and 8 are reserved for diagnostics and should always
> be set to the 'ON' position. Switches 4 through 7 correspond to slots,
> and should be set to 'OFF' _only_ if you have a timing sensitive card
> or device installed (e.g. disk controller, video digitizer, etc).

This was for the old Accelerator II.

The new Accelerator //e (with the two big chips in the middle) has eight
switches and seven jumpers. Sw1..7 should be set to 'off' if there is a
card in the corresponding slot which needs 1MHz timing (eg disk
controller). Sw8 slows down the whole system to 1MHz, but the computer
will still use Accelerator's ram and cpu.

As far as I remember, the jumpers must be set (or removed?) if the card
in the corresponding slot uses dma.


Patrick