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2022.06.03 added links to LisaList1 and LisaFAQ to the General Category

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 41 
 on: February 18, 2024, 04:00:19 am 
Started by andrew - Last post by andrew
It's an incredible relief to know there's a simple explanation for this. Rather than cutting wires on that digikey part, I'll just find a yellow stripe cable on ebay and swap it with the red stripe cable I'm using between my floppy A/B switch and the drive cage cable. Hopefully this will fix the issue.

 42 
 on: February 17, 2024, 11:37:32 pm 
Started by andrew - Last post by ried
That is an excellent explanation and I concur. Ran into the same issue with my Macintosh 128K, and changing the floppy drive cable fixed it. I did not know it would affect a Lisa in the same way.

 43 
 on: February 17, 2024, 08:13:12 pm 
Started by andrew - Last post by sigma7
800K drives ... run their ejection mechanisms constantly

Apple changed the 800k drive version at some point, and this was the symptom if the newer version was put into one of the earlier Macs.

I think the version change may have corresponded to removal of the "auto-inject" feature of the earlier drives, where the earlier drives would sort of finish the insertion of a disk for you with a snap action, while the later version required that you keep pressing the disk in until it dropped down with a more manual feel like the 400k drives. (Or maybe I've got that backwards.)

The newer drives (or some at least) used a ribbon cable with a yellow stripe instead of a red one. Those cables are missing conductors in the 9th and 20th positions. That isn't evident unless you look at the end of the ribbon where you can see those are solid plastic whereas the others contain obvious metal strands.

So disabling the constant eject requires disconnecting one or both of those. (Perhaps someone else knows if both need to be cut?)

Since you probably don't want to modify your Lisa's cabling (so you can use a 400k drive in the future), you might purchase/make an extension or something similar.

eg. cut wires 9 & 20 of DigiKey part# H3AWH-3006G

edit: added some details, DigiKey part#, corrected some errors and made new ones

 44 
 on: February 17, 2024, 07:53:39 pm 
Started by wagbox - Last post by wagbox
... the floppy cable within the drive cage itself ...

It's been so long since I've seen a 2/10 in it's original state I'd forgotten all about this (and a whole lot of other things as you've all prolly noticed from my posts -- apologies for the errors).

On the 2/10, the rear of the floppy drive is difficult to access in the drive cage as there isn't much space below the Widget, and the cooling fan is partially obstructing it.

So to make it easier to disconnect/remove the drive cage, there is a short 20 pin ribbon cable extension (about 6" / 15cm long) with a flanged male connector mounted to the rear of the drive cage beside the fan, and a female connector that plugs into the drive. When you remove the drive cage, this short cable goes with it. The cable in the chassis plugs into this extension rather than the drive itself.

On my 2/10, this short extension is indeed a rainbow ribbon cable, whereas the chassis mounted ribbon cables are all grey.

edit: since this is a straight through extension, OP could eliminate this as a potential source of problems by connecting the FEMU directly to the grey chassis cable.

I tried that actually, but nothing changed. I'll have to try the Emu on one of my Macs at my parents' place

 45 
 on: February 17, 2024, 07:15:52 pm 
Started by andrew - Last post by andrew
I've been having an issue for a while with 800K drives connected to my Lisa. I thought that perhaps it was related to the existing 400K ROM, but I recently finally got around to researching and getting all the materials I needed to burn a universal drive rom (yes, I know it's been a year  :-[). I can confirm I burned the ROM correctly because I was able to get one of the drives to write 800K to a disk that reads correctly in my Mac Plus.

The main issue is the drives will run their ejection mechanisms constantly. One drive repeatedly tries to eject while the other constantly tries to intake a disk, such that to eject or insert a disk I need to manually hold down the drive ejection switch. Both drives work on my Mac Plus without issue, but when connected to the Lisa they malfunction as such.

Has anyone else had this problem? What was the underlying issue?

 46 
 on: February 17, 2024, 09:19:37 am 
Started by blusnowkitty - Last post by andrew
Here's my Lisa 2/10:

Model: A6S0200
Memory Option: A6S0204
Serial No: A4304335
Applenet No: 00108229
Manufactured: 4304

 47 
 on: February 16, 2024, 05:54:29 pm 
Started by wagbox - Last post by sigma7
... the floppy cable within the drive cage itself ...

It's been so long since I've seen a 2/10 in it's original state I'd forgotten all about this (and a whole lot of other things as you've all prolly noticed from my posts -- apologies for the errors).

On the 2/10, the rear of the floppy drive is difficult to access in the drive cage as there isn't much space below the Widget, and the cooling fan is partially obstructing it.

So to make it easier to disconnect/remove the drive cage, there is a short 20 pin ribbon cable extension (about 6" / 15cm long) with a flanged male connector mounted to the rear of the drive cage beside the fan, and a female connector that plugs into the drive. When you remove the drive cage, this short cable goes with it. The cable in the chassis plugs into this extension rather than the drive itself.

On my 2/10, this short extension is indeed a rainbow ribbon cable, whereas the chassis mounted ribbon cables are all grey.

edit: since this is a straight through extension, OP could eliminate this as a potential source of problems by connecting the FEMU directly to the grey chassis cable.

 48 
 on: February 16, 2024, 05:37:28 pm 
Started by wagbox - Last post by AlexTheCat123
Quote
I am confused here.  Are you saying that your internal Lisa 2/10 ( card-cage to floppy, widget, keyboard/power sw) cable is a rainbow cable?   I have never seen that before, can you post a photo?

I'm just talking about the floppy cable within the drive cage itself, like what @wagbox shows in the video. The actual wire harness that connects the floppy, Widget, keyboard, and power switch to the card cage is just a normal single-color ribbon, but the floppy cable within the drive bay is different. I'll send a picture when I get home later this evening.

 49 
 on: February 16, 2024, 04:06:15 pm 
Started by wagbox - Last post by Lisa2
Quote
I think that rainbow cable is not a stock Lisa cable...? I wonder if that could also be a contributing factor?

Both of my 2/10s came with that exact same rainbow cable and they work great with the Floppy Emu, so I think it might be stock in certain systems.

I am confused here.  Are you saying that your internal Lisa 2/10 ( card-cage to floppy, widget, keyboard/power sw) cable is a rainbow cable?   I have never seen that before, can you post a photo?
Rick

 50 
 on: February 16, 2024, 01:26:57 pm 
Started by wagbox - Last post by wagbox
Yep, the manual says to keep it in Lisa mode (although I've tried Macintosh mode before with the same results). Honestly, thinking there might be something up with the Emu. I've never used it on another machine since it just came with the Lisa. I'll try it on a Macintosh once I get near my collection again...

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