ROM based games by STL

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Michael Brown
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ROM based games by STL

Post by Michael Brown » Fri May 25, 2018 2:46 pm

Hi All,

Does anyone have any other images of ROM vased games from STL.

I have Rat Race, but believe there was at least one more game by them.

regards,
Mick.

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vanekp
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Re: ROM based games by STL

Post by vanekp » Fri May 25, 2018 9:06 pm

can't say I have ever heard of that one.
Peter.

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sweh
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Re: ROM based games by STL

Post by sweh » Sat May 26, 2018 11:03 am

Rat Race appears to have been based on the STL "Sprite" ROM and "Tune" ROM (I don't see it on disks STL1-10, but I have a copy). Other than that, it's just a BASIC program copied into SWR.

I've just checked all my disks and I don't appear to have anything else using the Sprite ROM.
Rgds
Stephen

Michael Brown
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Re: ROM based games by STL

Post by Michael Brown » Sat May 26, 2018 5:21 pm

Hi Sweh,
thanks for looking!

regards,
Mick.

Coeus
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Re: ROM based games by STL

Post by Coeus » Mon May 28, 2018 6:03 pm

sweh wrote:
Sat May 26, 2018 11:03 am
Rat Race appears to have been based on the STL "Sprite" ROM and "Tune" ROM (I don't see it on disks STL1-10, but I have a copy). Other than that, it's just a BASIC program copied into SWR.
How does a BASIC program run from SWR given that the BASIC interpreter would be occupying the same address space?

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sweh
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Re: ROM based games by STL

Post by sweh » Mon May 28, 2018 6:24 pm

Coeus wrote:
Mon May 28, 2018 6:03 pm
sweh wrote:
Sat May 26, 2018 11:03 am
Rat Race appears to have been based on the STL "Sprite" ROM and "Tune" ROM (I don't see it on disks STL1-10, but I have a copy). Other than that, it's just a BASIC program copied into SWR.
How does a BASIC program run from SWR given that the BASIC interpreter would be occupying the same address space?
I haven't checked this specific ROM, but the standard pattern is that on startup the program is copied down into RAM, then BASIC invoked with something like "PAGE=&1900|MOLD|MRUN|M" in the keyboard buffer.

It doesn't _execute_ from ROM; it's just stored there.
Rgds
Stephen

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