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ATI Mach8/32 mode changes and cleanup:

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1. Cleanups and moving the mach8/32 struct to a dedicated header so that would allow for future 8514/A add-on clones (in paper).
2. Mach8/32's port 0x4ae8/9 and shadow set ports (0x5aee and 0x46ee) now account to the mode changes seriously, should fix most of the horizontal/vertical coordinates while entering GUI modes of various stuff.
3. Horizontal/Vertical window coordinates can only be modified if the display enable bit of port 0x22e8 is set as well as bit 0 of port 0x4aee, fixes most problems noted above.
4. Implemented horizontal blanking stuff a la VGA but actually for 8514/A and clones (like ATI).
5. Added some comments regarding the current situation.
6. The Mach8 was actually a 8514/A clone co-processor, not a single solution card of its own. The ATI Graphics Ultra was a single solution card that is actually a Mach8 + ATI 28800-6 in one, so renaming it accordingly.
7. Fixed garbled/distorted acceleration when device bitmap acceleration is enabled in the ATI Mach8 3.0 Win3.1 drivers.
This commit is contained in:
TC1995
2024-01-15 21:43:33 +01:00
parent 481b8c8b22
commit d17d13e3b8
8 changed files with 1075 additions and 657 deletions
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src/include/86box/video.h
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@@ -306,7 +306,7 @@ extern void xga_device_add(void);
/* IBM 8514/A and clones*/
extern void ibm8514_device_add(void);
extern const device_t mach8_isa_device;
extern const device_t mach8_vga_isa_device;
extern const device_t mach32_isa_device;
extern const device_t mach32_vlb_device;
extern const device_t mach32_mca_device;