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BIOS: Stop limiting Tandy mode to 624KB conventional RAM, it is breaking Tandy games that do not use the B800:xxxx alias of video memory

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Jonathan Campbell
2021-03-22 11:42:18 -07:00
parent 0e4a700355
commit 36df87f76c
1 changed files with 4 additions and 0 deletions
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4
src/ints/bios.cpp
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@@ -9286,11 +9286,15 @@ public:
if (t_conv > 640) t_conv = 640;
}
#if 0 /* NTS: This breaks Tandy games that write to system RAM addresses to draw on video RAM i.e.
not at B800:xxxx but at (TOP_OF_MEMORY minus 32KB). What is the correct behavior
here? */
if (IS_TANDY_ARCH) {
/* reduce reported memory size for the Tandy (32k graphics memory
at the end of the conventional 640k) */
if (machine==MCH_TANDY && t_conv > 624) t_conv = 624;
}
#endif
/* allow user to further limit the available memory below 1MB */
if (dos_conventional_limit != 0 && t_conv > dos_conventional_limit)