PC-DOS 1.10 and PCem v11

[mal.sh]

1) PCEm was downloaded and extracted.

2) PC-DOS 1.10 image file was taken from PCjs emulator
(or you can take one from Hampa emulator because their PC-DOS 1.10 images are binary identical).

3) Appropriate files(according to manual from readme.txt) were copied to .\roms\ibmpc directory.

4) The configuration was changed according these settings:



5) Machine was rebooted successfully:



6) PC-DOS 1.10 image file was mounted to drive A and machine was restarted via Ctrl+Alt+Delete.

I got error "2055 201":




What did I do wrong?

[SarahWalker]

Looks like there's a bug where the IBM PC won't boot with less than 640kb RAM. I will look into this.

[omarsis81]

According to this thread, the 2055-201 error means DIP switch misconfigured

http://www.vcfed.org/forum/showthread.p ... tion/page3

[SarahWalker]

Fixed in rev 540.

[mal.sh]

Fixed in rev 540.

Many thanks!

I'm sorry for stupid question, but... where can I get this revision?

[mal.sh]

According to this thread, the 2055-201 error means DIP switch misconfigured

http://www.vcfed.org/forum/showthread.p ... tion/page3

There's no possibility to change DIP switch configuration(for IBM PC and IBM PC XT) in the current version of PCem.

[omarsis81]

According to this thread, the 2055-201 error means DIP switch misconfigured

http://www.vcfed.org/forum/showthread.p ... tion/page3

There's no possibility to change DIP switch configuration(for IBM PC and IBM PC XT) in the current version of PCem.

I know. It was ment to be a help for the developer

[mal.sh]

Looks like there's a bug where the IBM PC won't boot with less than 640kb RAM. I will look into this.

With the memory's size range from 64 to 576 KB I got these errors:


64 KB -> 1055 201
128 KB -> 2055 201
192 KB -> 3055 201
256 KB -> 4055 201
320 KB -> 5055 201
384 KB -> 6055 201
448 KB -> 7055 201
512 KB -> 8055 201
576 KB -> 9055 201


After that,


1) I set the memory size equal to 640 KB;

2) I made another copy of PC-DOS 1.10 image file and I mounted the one to drive B;

3) Machine was reset via "Hard Reset";

4) It was rebooted successfully;

5) I tried to use the next command: FORMAT B:/1 - and I got such error: