IBM PCjr with the jrIDE - 2 floppy drives.

[jhuyett]

Hello All,
Question regarding the jrIDE when use with a dual floppy system (HxC as the secondary to be specific).
It seems like there are two boot processes taking place.
The first with bright colors. ESC will show the option to boot from A, C, or Cartridge.
The second with muted colors. ESC will show the option to boot from A, B, C, or Cartridge.

I posted a (poorly lit) video of the boot process at: https://youtu.be/gAi8kdBrqSU
Curious why the screen changes and if there is a way to prevent this, and if the two processes are required.

System Information:
DOS version 6.22.
config.sys:
DEVICE=JRCONFIG.SYS /V32 /D2

And lastly, is there a listing the different flags available for JRCONFIG.SYS? I see other posts using things like s30, t3, ... but haven't been able to find a reference manual.

Apologies if I missed any the above in the instructions.

Regards and stay safe,
j

 

[mbbrutman]

When you use jrConfig the machine boots twice; this is documented in a thread there somewhere. When the device driver loads the first time it fixes up memory locations and then reboots again so that DOS loads in the correct place to take advantage of your extra memory.

You might want to check out https://www.brutman.com/forums/ ... it's run by the same nut job that wrote the BIOS on the jrIDE. And most of the other PCjr nut jobs are there too. ;-0 The jrconfig device driver can be downloaded from http://www.brutman.com/PCjr/pcjr_downloads.html

 

[jhuyett]

Hello and thanks for the response.
Definitely familiar with your site and work. mTCP is being used on all my vintage PCs and appreciate all you've answered in the forums.

Some reason I thought the dual boot process only took place when I added /D2. Rechecked and I was mistaken.
And found my answer regarding flags in JRCONFIG.TXT.

Reading through everything again to see if there is a setting regarding muted colors in the second boot.

Thanks again.

Regards,
j

 

[KenEG]

Hello and thanks for the response.
Definitely familiar with your site and work. mTCP is being used on all my vintage PCs and appreciate all you've answered in the forums.

Some reason I thought the dual boot process only took place when I added /D2. Rechecked and I was mistaken.
And found my answer regarding flags in JRCONFIG.TXT.

Reading through everything again to see if there is a setting regarding muted colors in the second boot.

Thanks again.

Regards,
j

jrconfig is changing the video mode. I just added BW80 early in my autoexec.bat to change it back.

 

[jhuyett]

Hello KenEG and thanks for the response.
Good thought in changing modes. Done and working well thanks.

Regards,
j