|Re: Help: HP9825A Power Up Issue|
Message #1 Posted by Vassilis Prevelakis on 20 Dec 2012, 11:44 a.m.
In article http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv021.cgi?read=231264
John M (Ottawa) wrote on 15 Sept 2012, 5:12 p.m.
> [...] When I power up, I get flashing display - alternating between cursor and
> full-segment display (all pixels on). Pressing any key results in flashing to
> change between "error 01" and full-segment display.
He also indicates that the computer in question is a 9825A without any ROM cartridges.
However, the behavior of trying to load smth from a tape, reminds me of the autostart facility of the I/O ROM of the 9825 (9825 I/O ROM manual, page 4-3):
If a tape cartridge is installed when the computer is switched on,
it automatically executes a load program 0 ( ldp0) statement from
The I/O ROM is normally not present in an 9825A unless the appropriate drawer is in place. However, if the 9825A has been upgraded, it may contain built-in ROMs.
This should be indicated in the inside cover of the printer paper bin.