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2019.06.07 fixed NChat for the "Curve" theme, will eventually move it to its own page and add it to the default theme as well. Other plugins are next. see post in the Meta board for details

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 91 
 on: May 27, 2021, 07:23:35 pm 
Started by AlexTheCat123 - Last post by AlexTheCat123
You guys helped me fix my heavily corroded Lisa a while back, but unfortunately it's having problems again. I started having problems where it wouldn't turn on and when it occasionally would power up, it would give error beeps indicating that the I/O board was bad and the CRT wouldn't display anything. I got tired of the corroded and flaky I/O board, so I ordered a bare I/O PCB from John at VintageMicros around a week ago and got it fully assembled. I also made an X/COPS to replace the COP421. Now the computer will turn on when I press the power switch and the CRT turns on, which is an improvement, but clearly things still aren't working right (see the attached picture). There is also no sound of any kind from the speaker (no clicks or beeps). I'm assuming that this problem has something to do with the CPU board since it handles video generation, but I can't really probe it with the oscilloscope to figure anything out since it's inaccessible while the card cage is installed. Does anyone have any tips or suggestions of what to try next? Thanks for the help!

 92 
 on: May 25, 2021, 04:48:48 am 
Started by blusnowkitty - Last post by stepleton
LOL nevermind, conmega is right and Ray spotted it in 2007:

https://lisalist2.com/lisalist1/0974.html

or search in http://www.macmothership.com/lisacontent/signal/Signal23_April1985.html for "Pixel Switch Available". In that application, the two pots completely make sense as replacements for the vsize pot on the video board: you'd have one tuned for tall Lisa pixels and another for square Mac pixels.

 93 
 on: May 24, 2021, 05:49:06 pm 
Started by blusnowkitty - Last post by stepleton
No idea, but I remember that one of the things that VintageMicros et al. found in their board reproduction was a way to switch the Lisa to use inverse video on its display (white on black). The name "LisaVision" might be a good match for this. I don't know why that product would require variable resistors, though: I would have expected something like the inverse video trick just to monkey with some logic lines, and for that a fixed-value pulldown or pullup resistor would do the trick.

ETA: Wow, lots of interesting pictures there, as you say! This one might be a new entry for your catalogue: http://adam.trideja.com/Apple%20Computer%20Pics/Lisa/Lisa%201/Prototype%20Lisa%201/

 94 
 on: May 24, 2021, 02:02:13 pm 
Started by blusnowkitty - Last post by conmega
I'd assume something that tied into an adjustment, like width, and let you switch between two set adjustments with the flip of a switch. Handy if your running macworks as a dual boot configuration.

 95 
 on: May 24, 2021, 01:06:01 pm 
Started by blusnowkitty - Last post by blusnowkitty
So I found something strange here...

http://adam.trideja.com/Apple%20Computer%20Pics/Lisa/Lisa%20Vision/

Does anyone know what this thing is?

(By the way, lots of cool pictures are in the other folders there - worth a look)

 96 
 on: May 20, 2021, 08:33:58 am 
Started by conmega - Last post by conmega
I assume the third in https://www.ebay.com/itm/262721065197 was parallel?

I had made an offer (just to get a message through) of $24 a pop for two asking for a serial and a parallel. I have no idea if the person who bought one first got a parallel or serial. So I am not sure what he has left. If your looking for a serial I'd message him and ask.

The serial units seem more uncommon than the parallel units. Thus why when I saw the posting mentioning a serial unit I...
A) Jumped on it.
B) Hadn't actually realized there was a serial unit and when I saw there was I was instantly reminded of my suspicions that the Appleline is just an IRMAprint.
C) Struck up the discussion here.

I otherwise kinda kept the idea to myself before this since I knew the Appleline had serial not parallel.

Once I get my serial unit in I'll compare the roms to see if there is even some remotely similar code. Then probably just try compu_85's dump on it and hook it up to a terminal. What's the worst that could happen?
If it doesn't work I'll do further comparison of the boards either when compu_85 can get photos of the board inside or whenever I see him in person again.

 97 
 on: May 19, 2021, 07:52:50 pm 
Started by conmega - Last post by Al Kossow
I assume the third in https://www.ebay.com/itm/262721065197 was parallel?

I need to look to see what models I have. I haven't looked at them in a while.

 98 
 on: May 19, 2021, 05:11:41 pm 
Started by blusnowkitty - Last post by D.Finni
Wasn't Pepsi the codename for a Lisa 2 with 400K Sony drive?

 99 
 on: May 19, 2021, 07:28:51 am 
Started by conmega - Last post by conmega
THANK YOU!

I've been trying to find someone willing to dump the AppleLine firmware for a while now since I've been unable to find one!

Al,
Do you have dumps of the firmware from the IRMAprint units as-well? I just ordered a Serial and Parallel unit which I plan to dump for comparison. I will post those here if your looking for them.

 100 
 on: May 19, 2021, 07:13:51 am 
Started by conmega - Last post by Al Kossow
THANK YOU!

I've been trying to find someone willing to dump the AppleLine firmware for a while now since I've been unable to find one!

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