Re: [hatari-devel] ST Doom crash with 16Mhz+cache MegaSTE |
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- To: hatari-devel@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [hatari-devel] ST Doom crash with 16Mhz+cache MegaSTE
- From: Christian Zietz <czietz@xxxxxxx>
- Date: Wed, 11 Jun 2025 08:20:15 +0200
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Eero Tamminen schrieb:
NOTE: Everything works fine at 16Mhz, crashes start only after MegaSTE
(16KB) cache is also enabled (from GENERAL.CPX).
Could this be additional Hatari cache handling issue?
I cannot say I fully understood Hatari's MSTE cache handling at first
glance. But I wonder why it only uses bits 14-21 as tag:
https://github.com/hatari/hatari/blob/854422f30297be12f68b4e76e4f23c6f2beca4a6/src/m68000.c#L1290
.... whereas the real MegaSTE uses bits 14-23:
https://docs.dev-docs.org/htm/search.php?find=Atari+Mega+STE+Schematic
Wouldn't a too short tag cause wrong cache hits when ST-RAM and ROM are
cached?
Regards
Christian
--
Christian Zietz - CHZ-Soft - czietz@xxxxxxx
WWW: https://www.chzsoft.de/
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