<div>
Have you tried resetting the PRAM? Done a CUDA reset? Once booted you may want to check your software update control panel for firmware updates etc.
</div>


Have you tried resetting the PRAM? Done a CUDA reset? Once booted you may want to check your software update control panel for firmware updates etc.

<div>
PRAM has been zapped, cuda reset and a failed attempt to update to G4 Firmware 4.1.8. <br />
<br />
I figure that the attempted update has damaged the<br />
firmware boot info as indicated by<br />
<br />
&quot;open, unknown word<br />
DEFAULT CATCH! code=300 at %SSR0 : ff80b070<br />
%SRR1 : 00003030&quot;<br />
<br />
Can I restore the settings to default ?
</div>


PRAM has been zapped, cuda reset and a failed attempt to update to G4 Firmware 4.1.8.

I figure that the attempted update has damaged the
firmware boot info as indicated by

"open, unknown word
DEFAULT CATCH! code=300 at %SSR0 : ff80b070
%SRR1 : 00003030"

Can I restore the settings to default ?

<div>
I managed to fix the problem by re-installing the firmware upgrade. The trick was to release the programmers button during the firmware install as soon as the long tone is heard and not waiting till the end of the tone.<br />
<br />
&nbsp;The bootup from the G4 was acheived by unplugging and the re-plugging the battery before booting.
</div>


I managed to fix the problem by re-installing the firmware upgrade. The trick was to release the programmers button during the firmware install as soon as the long tone is heard and not waiting till the end of the tone.

 The bootup from the G4 was acheived by unplugging and the re-plugging the battery before booting.

<div>
<div class="content wysiwyg-content">
A G4 450DP running OS9.1 after a clean system install boots directly into open firmware with the message<br />
<br />
&quot;open, unknown word<br />
DEFAULT CATCH! code=300 at %SSR0 : ff80b070<br />
%SRR1 : 00003030&quot;<br />
<br />
then lists the bootROM build details followed by<br />
<br />
&quot;Welcome to Open Firmware.<br />
To continue booting type &quot;mac-boot and return&quot;<br />
<br />
but no response from keyboard.<br />
Any suggestions
</div>
</div>


A G4 450DP running OS9.1 after a clean system install boots directly into open firmware with the message

"open, unknown word
DEFAULT CATCH! code=300 at %SSR0 : ff80b070
%SRR1 : 00003030"

then lists the bootROM build details followed by

"Welcome to Open Firmware.
To continue booting type "mac-boot and return"

but no response from keyboard.
Any suggestions

G4 boots into open firmware.

Apple's early computers ran on a variety of operating systems, including a Pascal version and one based on CP/M, before releasing its ProDOS with the advent of its 16-bit computer. With the release of the Lisa, which had its own OS, Apple and computing entered the graphical age; it was followed by the Macintosh, which offered a series of "System" operating systems. Other Mac operating systems included PowerPC until Apple acquired NeXT and folded it into the Mac OS. Current operating systems for Apple devices are Mac OS-X and iOS.