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I have an Atari 800XL and recently got a handful of cartridges, including BASIC Computer Language (CXL4002).  So I was wondering if there was any difference between the the BASIC on the cartridge and what’s built in on the 800XL?

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The 800XL most likely contains a Revision "B" BASIC ROM.

 

Most brown-shell brown-label Atari BASIC cartridges were produced for the 400/800, and had revision "A".

 

If your BASIC cartridge has a silver label, it is likely revision "C" - which is also included on all XE computers. (both versions are designated CXL4002)

 

Both revision A and B had some serious bugs, which were finally fixed in C.

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? PEEK(43234)

 

The result will be 162 for rev A, 96 for rev B, or 234 for rev C.

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1 hour ago, Nezgar said:

The 800XL most likely contains a Revision "B" BASIC ROM.

I own one a later Taiwanese manufactured, fully socketed 800XL that came with BASIC REV.C.  I'm pretty sure that all of the fully socketed Hong Kong made XLs came with REV.B though.

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On 2/15/2020 at 3:32 PM, Nezgar said:

The 800XL most likely contains a Revision "B" BASIC ROM.

 

Most brown-shell brown-label Atari BASIC cartridges were produced for the 400/800, and had revision "A".

 

If your BASIC cartridge has a silver label, it is likely revision "C" - which is also included on all XE computers. (both versions are designated CXL4002)

 

Both revision A and B had some serious bugs, which were finally fixed in C.

 

On 2/15/2020 at 4:27 PM, Roydea6 said:

? PEEK(43234)

 

The result will be 162 for rev A, 96 for rev B, or 234 for rev C.

Thanks, and also very interesting.  I didn't mention it before, but in the same lot there was another BASIC cartridge installed into a Pac Man case.  I just assumed it was the same, but now I'm going to have to check it out to see what version it is. 🙂

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If it's homebrewed then likely it's B or C.  There were known fixes around for some bugs in A and B before the official ones rolled in so possibly there might be other variants of Basic around.

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1 hour ago, Rybags said:

If it's homebrewed then likely it's B or C.  There were known fixes around for some bugs in A and B before the official ones rolled in so possibly there might be other variants of Basic around.

Yup! Revision B.  Same as what's built into the computer. 🙂

 

I'll have to keep an eye out for the C cart!

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Just make your own or get someone to do you an EPROM, probably cheaper.

If you have C on hand there's no specific reason to develop using A or B.

If it's existing software you're using and not modifying then it'll likely be stable in A and B - most of the pain from B comes from the type-in stage, A isn't far behind in that sense.

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