Re: Question about 1 vs 2 from Adam Vaughn on 2005-10-04 (lisalist1)

From: Adam Vaughn <AdamAnt316_at_email.domain.hidden>
Date: Tue, 04 Oct 2005 15:27:06 +0000

Sorry to hijack this thread a bit, but I have a Mac XL which seems to have a bit of an identity crisis. The front panel matches that of a Lisa 2, but the set of ports on the back include a parallel port, akin to a Lisa 1 (also, the unit came with an original-style Lisa mouse). The internal 20MB hard drive connects to this parallel port via a ribbon cable which sticks out of the back cover. The backside of the front panel has the word "PROTOTYPE" molded into the plastic, as well as some shoddily-cut plastic here and there. Might this mean anything? Thanks in advance. -Adam

--
Adam Vaughn 
Collector of old computers, video game systems, radios and other electronic
equipment... 
Visit my page at
http://www.electronixandmore.com/adam/index.html




> > If a lisa 2 had all it's internal boards (IO, Mother, CPU and RAM)


> > dated 1982, would it be a fair guess that this was a Lisa 1 that has

> > been upgraded to a Lisa 2? I have also noticed that at the back the

> > drive cage some small modifications (cut away some of the metal) have

> > been made  to make room for cables leading from the lisa to the 'Lisa

> > Lite adaptor' board. This 'lite adaptor' board is also the only board

> > in the machine dated 1993.

> It's my understanding that all Lisa's have some board dates of 1982, and

> this alone does not indicate a Lisa1 conversion.

> Other Lisa 1 clues to look for may be:

> 1. An original Lisa mouse (with funky clip connector), later Lisa2's used

> the mac mouse with thumbscrews.

> 2. Early SN# or AppleNet#

> 3. A gold and ceramic package CPU

> 4. A resistor (R47?) on the IO board

> 

> > This machine has a 1.2 Amp power supply, that will stay on for a

> > short time, then power down. Some times it won't start at all, and

> > lets out a little 'cheep cheep!' noise (like a bird) when you hit the

> > power button. Has anyone had this problem before?

> > If it is the power-supply that is dying, can a more reliable 1.8 amp

> > power supply be used to replace a dying 1.2 amp version without any

> > modification?

> Using the 1.8 P/S works well and is a popular and common upgrade for all

> Lisa's.  It's a plug and play replacement for the 1.2amp unit.

> 

> > Also, when going through it's self diagnostics, it gets an error 57

> > in the IO board. I have read from the 'Do it yourself' guide from Sun

> > Rem that this is a 'Disk controller' problem and may also have

> > something to do with the Lisa Lite card. Any ideas what I should

> > check first?

> If the I/O card was swapped from an other unit, check the Floppy controller

> ROM ver.  You may have the 800K ROM for a 400K drive or vice-versa.

> 

> Hope this helps,

> Rick

> 

> 

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Received on 2005-10-04 08:40:28