02-05-2023, 09:44 PM
Hi
My resources
1. 2off HP47511 or HP110 Portable Plus
2. copy of DOS 3 to 7 version which I wish to install
3 ROM Burner - GQ-4X4 USB Universal 40 pin Programmer
4. I have M27C256B-12F1 - ST Microelectronics EPROM
Would love to do
Burn a upgraded copy of a DOS2.11 to DOS 5 or 6
What I have done so far:
I have taken out existing HP110+ software draw ROMs and read them.
First few lines of which is HP product number...
What I failed to find is a location of DOS2.11, I think it is soldered to the main board.
Did you guys ever upgrade the DOS??
I did try to load DOS3 by setting CONFIG.SYS to bypass PAM,
by using
> SHELL=A:\COMMAND.COM /P A:\
I used the HP9114B to load DOS3 into A: and I rebooted - I hope.
HP110+ hung, had to use battery reset...
What do you think of my approach?
Did you have a different approach?
https://photos.app.goo.gl/y5DYptc35sFsCvZK8
Regards Nick
My resources
1. 2off HP47511 or HP110 Portable Plus
2. copy of DOS 3 to 7 version which I wish to install
3 ROM Burner - GQ-4X4 USB Universal 40 pin Programmer
4. I have M27C256B-12F1 - ST Microelectronics EPROM
Would love to do
Burn a upgraded copy of a DOS2.11 to DOS 5 or 6
What I have done so far:
I have taken out existing HP110+ software draw ROMs and read them.
First few lines of which is HP product number...
What I failed to find is a location of DOS2.11, I think it is soldered to the main board.
Did you guys ever upgrade the DOS??
I did try to load DOS3 by setting CONFIG.SYS to bypass PAM,
by using
> SHELL=A:\COMMAND.COM /P A:\
I used the HP9114B to load DOS3 into A: and I rebooted - I hope.
HP110+ hung, had to use battery reset...
What do you think of my approach?
Did you have a different approach?
https://photos.app.goo.gl/y5DYptc35sFsCvZK8
Regards Nick