Re: 2001N/basic-4 UD3 option

On Tue, Oct 10, 2017 at 1:51 PM, smf <smf@null.net> wrote:
> I found it output a message and overwrote some variables in memory, but I
> quickly figured out that it would be easier to run it than debug it. So I
> tried it in vice using a PET 4032 with your dump loaded as option rom 9 (it
> has to load at $9000).
>
> I had to type SYS 36864, it outputs MK-B2.2

I found the string 'AEUXSL^@DMGRF_#*VNZ' near the end of the ROM and
it looked like a command list.

> .a sets a window
> .e sets a windows and goes to the home position
> .b,.c,.d,.f,.h,.i,.j,.k,.n,.o,.p,.q,.t,.w give ? followed by the letter, so
> I assume it's unrecognised

On the above list, D, F, and N appear.  They might do something after all.
Don't see any mention of Y, but it's not on the list.

Also, there's ^ and _ and *...

> .g single step basic program, says can't continue error if not running a
> basic program
> .l needs to be followed by a string or you get a syntax error or type
> mismatch. I didn't have a disk setup and I got a file not found, but it was
> probably trying to load.
> .m needs to be followed by a string or you get a syntax error or type
> mismatch. It doesn't give any indication what it is doing
> .s needs to be followed by a string or you get a syntax error or type
> mismatch. I didn't have a disk setup and got a file not found, but it was
> probably trying to save.
> .r starts stepping, each line will be listed and executed and then a .g
> command will be automatically displayed waiting for you to type enter
> .u swaps between upper and lower case
> .v does nothing
> .x says ready and seems to uninstall it.
> .z needs to be followed by a number or you get a syntax error or type
> mismatch. It then prints a number, I can't figure out what that number is.
> .@ views the drive status, or if you give it a string it will send that to
> the drive.
> .# does nothing

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