Thanks for having a look at it.

I have another question: how does "run selected code" work? If I apply it to this code:

Sys2087 ldx #$00
L0829 lda L0838,x
sta $0100,x
inx
bne L0829
ldx #$ff
txs
jmp $0100

The result panel appears, but it is titled "Emulated effects from $0838-$0838" and it ...

I think there is an issue with "T" command for displaying PETSCII text: this code:


10 0c 01 19 05 12 13 3a 20 31 20 20 20 13 14 01
12 14 20 01 14 20 13 05 03 14 0f 12 3a 20 30 31
20 20 01 14 14 01 03 0b 20 0f 06 20 14 08 05 20
0d 15 14 01 0e 14 20 03 01 0d 05 0c 13 20 20 20
20 03 0f 0c 0c ...