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16700A How to change baud rate when using boot menu via RS232?

 

When using the 16700A boot menu through the rear panel RS232 serial port, how do I increase the baud rate from its default 9600? I tried the command "PATH CON SERIAL_1.19200.8.none", and it acknowledged the 19200, but it still runs at 9600 even after rebooting. I want to dump some memory and capture it. Faster baud rate would help.
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I see two megabyte of interesting data beginning at memory address 0xF0000000. Could be the boot ROM. Maybe I can figure out how the "user defined" monitor resolution works and configure 1600x1200 at 60 Hz. Maybe.
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By the way, to switch the console back to VGA+PS2 keyboard, the command is "PATH CON GRAPHICS(0)".
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Beware the command "PATH CON SERIAL_2" switches the boot console to an *internal* RS232 serial port. I did that by mistake. That port's TxD and RxD signals are located on pins 5 and 3 of the SN75C185 transceiver chip located on the top side of the CPU board near connector J1. I clipped onto those two signals, and saw the boot menu, also at 9600 baud. I don't know where those RS232 signal go, perhaps to the emulation module (I don't have one).
 

"norbinz via groups.io" <norbinz@...> writes:

When using the 16700A boot menu through the rear panel RS232 serial
port, how do I increase the baud rate from its
default 9600? I tried the command "PATH CON SERIAL_1.19200.8.none",
and it acknowledged the 19200, but it still runs at
9600 even after rebooting. I want to dump some memory and capture
it. Faster baud rate would help.
I see two megabyte of interesting data beginning at memory address
0xF0000000. Could be the boot ROM.
It's PA-RISC I/O space. All of the peripherals and Firmware (PDC) are
located there.

Maybe I can figure
out how the "user defined" monitor resolution works and configure
1600x1200 at 60 Hz. Maybe.
Does your LA have Option 003? If not, there's not sufficient Video
memory to show 1600x1200 (at least not for color display). On normal
PA-RISC workstations you can configure user defined resolutions with SAM
if i remember correct.
 

Yes, my analyzer has option 003. It can output 1600x1200 at 75 Hz, but that's too fast for (probably all) 1600x1200 LCD monitors. My old ViewSonic VP201b almost works, but jitters.
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I've already tried SAM, but "Display > Monitor Configuration > HP VISUALIZE-EG(Internal)" seems broken. Most monitor info is blank, and one says "not supported by setmon".
I tried running setmon from a console. It displays help, but all of its useful commands complain "GCCONFIG: Invalid argument". Maybe that's why SAM misbehaves.
I'm guessing setmon writes the user-defined monitor settings into "stable storage". Maybe I could do that manually if I could find a description of stable storage. Maybe disassemble the boot ROM, or setmon.
 

"norbinz via groups.io" <norbinz@...> writes:

Yes, my analyzer has option 003. It can output 1600x1200 at 75 Hz, but
that's too fast for (probably all) 1600x1200 LCD
monitors. My old ViewSonic VP201b almost works, but jitters.
Ok.

I've already tried SAM, but "Display > Monitor Configuration > HP
VISUALIZE-EG(Internal)" seems broken. Most monitor info
is blank, and one says "not supported by setmon".
I tried running setmon from a console. It displays help, but all of
its useful commands complain "GCCONFIG: Invalid
argument". Maybe that's why SAM misbehaves.
I'm guessing setmon writes the user-defined monitor settings into
"stable storage".
You're correct - the custom video mode is written to Flash.
could find a description of stable storage. Maybe disassemble the boot
ROM, or setmon.
I reverse engineered the format for the Visualize FX cards many years
ago, but cannot find the information right now. I'll keep digging, maybe
i find it.

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