Re: lisa 2 startup problems

Hello James, Tezza,

Thanks for the help :)

I tested the IO Board from the LISA 2/10 and it works (I have also modified the Lisa Lite but was late for work so no time to test with the 400k Sony floppy) although, the IO Board from the LISA 2/10 was working fine because I got no error and the ROM reported correctly 88.

I have also installed the ROM from the 2/5 IO Board into the 2/10 IO board and got the correct number A8, so the ROM should be fine.

The 6504 processor is working fine since I swapped them between the two IO boards. I will search for shared memory chips to change them on the defective IO board.
Do you have a good schematics for the LISA 2/5 IO Board? I have some schematics for the 2/10 and a schematic that is barely visible from the Hardware Manual edition 1981.

Further I have to dig into the CPU Board to get it working, the original CPU Board from the LISA 2/5 won't work, I get no bip, no nothing except some weird capacitor sound from the PSU when this board is connected, something should be draining to much power I think. Unfortunately it is nearly impossible to measure something on this board while inserted into the card cage.

Have a nice Week,
Alex

luni, 7 ianuarie 2013, 03:26:50 UTC+2, James MacPhail a scris:
>
>
> >I can now start the Lisa 2/5.
>
> Congratulations!
>
> >Any Ideas about the source of the problem would be appreciated.
>
> >It is weird since I get at booting the Rom version different,
> >sometimes it is the same but sometimes different until now I got:
> >3A/48
> >3A/88
> >3A/60
> >3A/8F
> >3A/FF
>
> The second part of the ROM version is the version of the I/O Board
> ROM. This is read by the 68000 CPU from the memory (on the I/O Board)
> which is shared with the 6504.
>
> It is possible that the value is truly incorrect and varying, perhaps
> due to the 6504 not running properly (even if the 6504 is working, it
> may not be reading the EPROM, or the shared memory might not be
> working), or the CPU board might not be accessing the I/O board
> properly.
>
> >the Lisa Lite adapter
>
> Malfunction of the Lite Adapter would only affect actual operation of
> the floppy.
>
> >I cannot test the ROM (341-8003), should this ROM work with the IO
> >Board from the 2/10?
>
> The ROM is specific to the type of I/O Board. The 2/5 I/O Board needs
> a version A8 Lisa 2/5 ROM, and the 2/10 I/O Board needs a version 88
> Lisa 2/10 ROM. This is independent of the CPU Board ROM, which can be
> H, or 3A, or various others. For more info, see:
>
> http://lisafaq.sunder.net/lisafaq-hw-rom_versions.html
>
> You can put the 2/10 I/O Board in the 2/5, but the floppy will not
> work unless you modify the Lite Adapter. See:
>
> http://lisafaq.sunder.net/lisafaq-hw-io_substitution.html
>
> I suggest NOT modifying the Lite Adapter, and just see if the machine
> works properly with the 2/10 I/O Board. If the problem persists, then
> it implies an issue between the CPU and I/O Board. If the problem
> goes away, then it implies an issue with the 2/5 I/O Board.
>
> Good luck!
>

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