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Re: Choplifter P8 - think I got it [message #383415 is a reply to message #383395] |
Mon, 29 April 2019 02:55 |
mdj
Messages: 301 Registered: December 2012
Karma: 0
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On Sunday, 28 April 2019 16:18:59 UTC+10, Steve Nickolas wrote:
> On Sat, 27 Apr 2019, mdj wrote:
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>> Nice - did you patch it for IIc+ compatibility ?
>
> Didn't patch it for anything. Not even aware of any issues.
IIRC, Choplifter outputs sound to cassette out as well as the speaker. Since CASOUT is actually the ROM bank toggle on a 32k ROM IIc this will crash any older software that calls a ROM routine that's in 1 16k ROM bank but not the other. From memory it runs fine on all the 32k ROM original IIcs but fails on the IIc plus. Search the group archive on Google I'm sure it'll turn up the discussion
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Re: Choplifter P8 - think I got it [message #383421 is a reply to message #383415] |
Mon, 29 April 2019 13:23 |
qkumba
Messages: 1584 Registered: March 2013
Karma: 0
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Yes, the issue was discussed previously. Serpentine does the same, along with some others which I forget repeatedly. My Choplifter (and Serpentine and whatever else) port is patched accordingly.
We didn't patch the disk when cracking with Passport, so the crack (mis)behaves exactly as the original did.
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Re: Choplifter P8 - think I got it [message #383462 is a reply to message #383415] |
Wed, 01 May 2019 13:00 |
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Originally posted by: Brian Patrie
2019-04-29 01.55, mdj wrote:
> IIRC, Choplifter outputs sound to cassette out as well as the speaker. Since CASOUT is actually the ROM bank toggle on a 32k ROM IIc this will crash any older software that calls a ROM routine that's in 1 16k ROM bank but not the other. From memory it runs fine on all the 32k ROM original IIcs but fails on the IIc plus. Search the group archive on Google I'm sure it'll turn up the discussion
The VBI flag craziness, and now this? The more i learn about the
intricacies of the IIc & IIc+, the less i like them. :(
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