Nspire Compatibility

bwang · **Joined:** Tue Nov 11, 2008 7:36 pm **Posts:** 25

It seems that BBC Basic is almost compatible with the TI-Nspire in 84+ mode. So far the only issues I've found are that VDU 5 and several PLOT commands crash the Nspire. Is it possible to fix this?

benryves · **Posted:** Sat Nov 21, 2009 2:18 am

Do you know which instructions/features are not emulated? I don't have an Nspire to test, myself. :-(

There are four uses of sl1, which I believe is an unsupported instruction. Is it generally best to have a special Nspire version, or to use the same on all machines with a few wasted clock cycles in the 83+/84+ versions?

If the BBC BASIC interpreter itself uses unsupported features, there's nothing I can do about that.

bwang · **Joined:** Tue Nov 11, 2008 7:36 pm **Posts:** 25

It seems that most graphics commands and anything involving TIME$ don't work.
It would probably be best to have an Nspire version to keep things fast. How hard would it be to get rid of those four unsupported instructions?

darkstone knight · **Joined:** Sun Nov 09, 2008 1:56 pm **Posts:** 67

sll is the same as scf\ rl

just 4 wasted clock cycles and a byte..

benryves · **Posted:** Sun Nov 22, 2009 8:31 pm

I have spent a long, hard weekend slaving over the BBC BASIC source code trying to get it to work on the Nspire.
Or, to put it another way, I added .define sl1 scf \ rl to the first source file.

How does this perform? (See attached file).

tr1p1ea · **Posted:** Mon Nov 23, 2009 12:50 pm

Oh snap! Damn NSpire for not including undocumented instructions!

benryves · **Posted:** Mon Nov 23, 2009 4:12 pm

Well, I can only assume that's the problem. I don't have an Nspire to test against, which is why I'm hoping for some help in this.

bwang · **Joined:** Tue Nov 11, 2008 7:36 pm **Posts:** 25

It no longer seems to crash (at least everything that didn't work before works now).

benryves · **Posted:** Tue Nov 24, 2009 2:07 am

Glad to hear it - let me know if you spot any other oddities!

Thank you very much!

Galandros · **Joined:** Sun Sep 14, 2008 10:00 am **Posts:** 75

Nspire compatibility, great. Good update.

toml_12953 · **Joined:** Fri Jul 24, 2009 4:19 am **Posts:** 8

Galandros wrote:

Nspire compatibility, great. Good update.

How much free memory does BBC BASIC have on the Nspire? The same as on the 83?

Tom L

bwang · **Joined:** Tue Nov 11, 2008 7:36 pm **Posts:** 25

The same, since it is running on an 84+ emulator.

bwang · **Joined:** Tue Nov 11, 2008 7:36 pm **Posts:** 25

VDU 5 still crashes.

benryves · **Posted:** Sat Dec 05, 2009 11:27 pm

How does it crash? Shortly/immediately after running the VDU 5 command, or some time after running another command in VDU 5 mode?

Does

Code:

VDU 5:REPEAT:UNTIL.

crash when running, or only when you press On to break?

bwang · **Joined:** Tue Nov 11, 2008 7:36 pm **Posts:** 25

VDU 5 crashes immediately upon running, as does VDU 5:REPEAT:UNTIL

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Nspire Compatibility

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