* Fix sign position of DDA accumulator registers
* S3 ViRGE: Move sign bit 1 bit further to the right for K1/K2 scaler registers
* K1 scales are 13 bits
The rework resolves around implementing the clock multiplier and multiplexing rate of the bt485 ramdac alongside existing additional flags for eventual fixes (like cr31 bit 1) as well as the true color bypass (for 16-bit and true color modes). These, together, allow proper rendering of the generic VESA S3 drivers alongside non-VESA ELSA OEM drivers on various guests.
1. Rewritten Sierra SC1502x RAMDAC code to match the manual, allowing proper BPP selection on cards which use it.
2. Added a reference clock variable for cards which have a different default one (ELSA cards namely) on the ICD2061 code.
3. Reorganized RAMDAC selection in the S3 code.
4. Added more ELSA Winner cards based on the 928 chip (ELSA Winner 2000 ISA, 1000 VLB and 1000 PCI based on 928PCI).
5. The horizontal override is now also enabled for ELSA Winner 1000 (928 VLB and PCI) cards with 32bpp set, to avoid wrong horizontal displays.
6. LFB in PCI mode doesn't have the same limitations as on VLB or ISA.
7. Added more hdisp adjustments for the Elsa cards.
8. Mono patterns are now more correct in ROPBLT acceleration (command 14), fixes blackness in some instances of Win95 (matching the 968 manual).
9. Minor cleanup on the accel registers.
1.Move the 93cxx EEPROM implementation to the mem directory since it's used by cards which are not nics (e.g.: DC390 SCSI and S3 ELSA cards).
2. DC390 specific: remove the implementation used there and use the generic one from mem (used to be on the network directory) as well as fixing bus reset when interrupts are related.
3. S3: when the 64k size is selected in the LFB, use the SVGA 64k mapping as LFB (0xA0000).
1. If a card uses the icd2061a clock, so be it in a better way.
2. Vertical display fixes for heights greater than 1024 pixels, e.g.: 1600x1200 on the ELSA 96x cards.
3. Misc fixes (ROPBLT).
4. 0x3ca and 0x3cb in read mode are actually different from writes.
