emusonacid! legacy

Since I got CF working on the SCSI port, I'd like to replace the floppy drive
and use it as an CF slot.

If I remove the floppy drive, the Ultra won't boot. Has anybody experienced anything similar?

You would need some kind of dummy dongle to put on the port. Don't know if that exists. You could also just stuff the floppy drive inside if theres space for it.

I mounted the drive internally- stupid, but works :)

i did it today! i used two jumpers to connect row 10-11 and 14-15 and it will boot. you'll have to avoid the floppy icon in the browser as well as selecting floppy when choosing a drive to load from because it hangs for a minute of so (although it doesn't hang irrecoverably, yay!)

delete wrote:i did it today! i used two jumpers to connect row 10-11 and 14-15 and it will boot. you'll have to avoid the floppy icon in the browser as well as selecting floppy when choosing a drive to load from because it hangs for a minute of so (although it doesn't hang irrecoverably, yay!)

Mine hangs for a minute or so even when floppy drive is actually there, so, that's nothing else than usual;)

TSR wrote:Since I got CF working on the SCSI port, I'd like to replace the floppy drive
and use it as an CF slot.

If I remove the floppy drive, the Ultra won't boot. Has anybody experienced anything similar?

Did you post a thread shwoing all the parts you used?

Many thanks

Andy

delete wrote:i did it today! i used two jumpers to connect row 10-11 and 14-15 and it will boot. you'll have to avoid the floppy icon in the browser as well as selecting floppy when choosing a drive to load from because it hangs for a minute of so (although it doesn't hang irrecoverably, yay!)

Are you absolutely sure that you connected the pins
10 <--> 11 and 14 <--> 15 to achieve booting.

This means you connect "drive select" to ground.

Here's a pin diagram which may clear things up a bit.

http://www.lukasbit.de/images/hardware/ ... fosten.gif

TSR

Hello,

Sorry, it is row 10 to row 11 and row 14 to row 15. If i understand FAT and ATA correctly, it doesn't matter which of the 2 pins on the row you'll use. I used the ones on the right (viewing the board from the front panel side) so in my sampler is pin 19 to pin 21 and pin 27 to pin 29.

Connecting the pins 19-21 and 27-29 doesn't help booting the Ultra.
Mine hangs with the "128MB Memory installed" message.

Actually, I'm wondering how this configuration could do anything,
since all the pins are GROUND=(German: Masse).

http://www.lukasbit.de/computer/pinbelegung.php#floppy
(You have to scroll down to "Floppy")

34 33
32 31
30 29-------
28 27------- connected
26 25
24 23
22 21-------
20 19------- connected
18 17
16 15
14 13
12 11
10 09
08 06
06 05
04 03
02 01

TSR

it doesn't hang. wait for it for a minute or so. mine lags there a bit too. i haven't found a way to avoid it.

delete wrote:it doesn't hang. wait for it for a minute or so. mine lags there a bit too. i haven't found a way to avoid it.

I just recognized that my Ultra boots after about two minutes, regardless
whether I connected the pins or not. Seems I've been too impatient.

TSR

Finally, is there any way to have the sampler boot normally (without waiting) with no floppy mounted ? I mean, does connecting the pins help ?

one way would be to use this Floppy Emulator ;-)

http://www.reflexmusic.de/DSS-1/


http://www.torlus.com/floppy/

Quite a smart design - for old machines to allow a floppy "drive" to be imaged, loaded off a PC into an SRAM or Flash memory "drive" block thats the "image" read from the device via track read/sector read.

Clever!

Schematics here and firmware:

http://jeanfrancoisdelnero.free.fr/flop ... pyemulator


I would imagine that the simple act of pulling down Pin 34 to ground would let the Ultra 'think' there is a floppy drive (Drive Ready).

Pin 34 is often used as a non specified READY (active low) line.

Here's a floppy disk drive which shows some of the signal flow:

http://dspd.teac.de/fileadmin/redaktion ... _Rev-A.pdf

and a slightly different interface here:

http://www.sprow.co.uk/bbc/hardware/flo ... HFC429.pdf

Which interface does the Emu have I wonder ?

M

M

At my own risk, I checked to put pin 34 (Disk Change) to ground
and the Ultra is actually booting after showing the "xxx MB of memory
installed " message for about 5 seconds.

If I try to access the floppy drive, it says "no folders..."
but I can always get back to the hard drive icon.
So, no hang ups there!

TSR

kalide, TSR : this is great news !
Special thank to TSR who tested for us

... and another mod to make to our beloved E-MUs !!