Nspire Compatibility

bwang · Post by **bwang** » Sat 21 Nov, 2009 2:05 am

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?

Post by **benryves** » Sat 21 Nov, 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 · Post by **bwang** » Sat 21 Nov, 2009 6:34 am

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 · Post by **darkstone knight** » Sat 21 Nov, 2009 2:16 pm

sll is the same as scf\ rl

just 4 wasted clock cycles and a byte..

Post by **benryves** » Sun 22 Nov, 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).

Post by **tr1p1ea** » Mon 23 Nov, 2009 12:50 pm

Oh snap! Damn NSpire for not including undocumented instructions!

Post by **benryves** » Mon 23 Nov, 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 · Post by **bwang** » Tue 24 Nov, 2009 1:01 am

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

Post by **benryves** » Tue 24 Nov, 2009 2:07 am

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

Thank you very much!

Galandros · Post by **Galandros** » Tue 24 Nov, 2009 8:55 pm

Nspire compatibility, great. Good update.

toml_12953 · Post by **toml_12953** » Wed 02 Dec, 2009 8:08 pm

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 · Post by **bwang** » Sat 05 Dec, 2009 3:59 am

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

bwang · Post by **bwang** » Sat 05 Dec, 2009 11:01 pm

VDU 5 still crashes.

Post by **benryves** » Sat 05 Dec, 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: Select all

VDU 5:REPEAT:UNTIL.

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

bwang · Post by **bwang** » Sun 06 Dec, 2009 1:09 am

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

MaxCoderz

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