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- GIFHEX v1.1 (c) Copyright 1990-1991 Lawrence Gozum & Marvin Gozum MD.
-
- GIFHEX is VGA2EGA reincarnated. It is a dithering utility to convert
- GIF or PCX or BLD/PLT images, with 256-colors, to variable, error-
- distributed, dithered, 16-color pictures (up to 1024x768x16). It
- supports FOUR different algorithms to maximize your 16-color modes.
-
- This reincarnation of VGA2EGA is due its new mission - PUSH VGA and
- SVGA 16-COLOR MODES to the MAX !!! "HEXdecimal" means base sixteen -
- ergo the new name. Successful experiments in the 16-color arena will
- be generalized to 256-color dithering schemes to render those soon to
- appear 24-bit, 16-Million color images.
-
- In the short-term, you'll probably notice that SVGA 1024x768x256 images
- tend to show more detail in dithered 1024x768x16 modes than interpolated
- (ie., sub-sampled) 640x480x256 modes.
-
- Moreover, the greatest common denominator, with the greatest standard
- resolution is the 640x480x16 mode (although we think the non-standard
- 360x480x256 video mode is better, it is still non-standard). Thus, many
- 'GENLOCK' add-on boards have optimized the sync of their 640x480x16 modes
- for 'keying' - ie., for computer graphics overlays over real-time video
- images. The 640x480x16 mode is quite adequate when viewed as a special
- effect (ie., 'posterization) which is quite nifty for making video
- MultiMedia presentations with 'GENLOCK' add-on cards.
-
- Last but not the least, Intel's DVI (Digital Video Interactive) technology
- uses VGA 640x480x16 as its video overlay mode. DVI will probably be THE
- 'de facto' standard for FULL MOTION VIDEO on your generic PC in the next
- year or so. Intel has plans for making DVI VERY AFFORDABLE for home users.
-
- One of the algorithms is a version of IDTVGA dithering, modified for
- EGA and VGA; IDTVGA stands for "Improved Definition Televion for VGA".
- This dithering scheme was originally designed to 'show' over 100,000
- colors in SVGA 256-color modes. Here it has been adapted to 'show' 216
- colors in VGA/SVGA 16-color modes and 64 colors in EGA 640x350x16 mode.
-
- Ofcourse, we have included the classic 8-COLOR and 16-COLOR dithering
- schemes using 3-plane or 4-plane Floyd-Steinberg dithering with Stuki-
- like values. And, on a more radical note, we are introducing a new
- approach to 16-color dithering via HSV (Hue, Saturation and Value)
- look-up tables; this dithering method renders BRILLANT colors.
-
-
- GIFHEX11.ZIP or (.ARC) MUST INCLUDE THE FOLLOWING
- ====
- GIFHEX DOC user manual
- GIFHEX EXE main program
- GIFHEX CFG default user mode
- BRUN41 EXE required run-time module
- REGISTER DOC registration form
- VGAFIL EXE GIF Encoder for NYBLSCRN.RAW/PLT files
-
-
- USER MODES CHIPSET/VIDEO CARD REFERENCE
-
- AHEAD480 CFG 640x480x16 Ahead EGA 480
- AHEAD800 CFG 800x600x16 Ahead-A or Ahead-B
- AHEAD1KE CFG 1024x768x16 Ahead-B only
- ATI560 CFG 800x560x16 ATI EGA Wonder
- ATI800 CFG 800x600x16 ATI VGA Wonder
- ATI1024 CFG 1024x768x16 ATI VGA Wonder
- C&T-800 CFG 800x600x16 C&T 451/452/453/455/456
- C&T1024E CFG 1024x768x16 C&T 452/453
- EVOLD512 CFG 512x480x16 EV673
- EVOLD800 CFG 800x600x16 EV673
- EVNEW800 CFG 800x600x16 Everex Viewpoint
- EVNEW-1K CFG 1024x768x16 Everex Viewpoint
- EVRAM800 CFG 800x600x16 Everex VRAM
- EVRAM-1K CFG 1024x768x16 Everex VRAM
- GENOA480 CFG 640x480x16 Genoa SuperEGA
- GENO720E CFG 720x512x16 Genoa 6x00 or 5x00 or SuperEGA
- GENO800E CFG 800x600x16 Genoa 6x00 or 5x00 or SuperEGA
- GENOA1KE CFG 1024x768x16 Genoa 5x00 w/ Tseng 3000
- GVGA-1KE CFG 1024x768x16 Genoa 6x00 w/ GVGA
- HEAD720E CFG 720x540x16 Headlands/V7VGA 1024i
- HEAD800E CFG 800x600x16 Headlands/V7VGA 1024i
- HEAD-1KE CFG 1024x768x16 Headlands/V7VGA 1024i
- OAK80016 CFG 800x600x16 Oak
- OAK1KB16 CFG 1024x768x16 Oak
- PDISE480 CFG 640x480x16 Paradise EGA 480
- PVGA800E CFG 800x600x16 Paradise
- PVGA-1KE CFG 1024x768x16 Paradise 1024
- PRISM800 CFG 800x600x16 ATI Prism Elite (Trident chipset)
- STBEM960 CFG 960x720x16 STB VGA Extra EM
- TECMR800 CFG 800x600x16 Tecmar VGA/AD w/ Tseng 3000
- TECMR-1K CFG 1024x768x16 Tecmar VGA/AD w/ Tseng 3000
- TRIDN800 CFG 800x600x16 Trident 8800/8900
- TRIDN-1K CFG 1024x768x16 Trident 8800/8900
- TSENG800 CFG 800x600x16 Tseng 3000
- TSENG-1K CFG 1024x768x16 Tseng 3000
- T4-1K016 CFG 1024x768x16 Tseng 4000
- T4-80016 CFG 800x600x16 Tseng 4000
- V7-720E CFG 720x540x16 V7VGA
- V7-800E CFG 800x600x16 V7VGA
- V7-1024E CFG 1024x768x16 V7VGA
- VEGA480 CFG 640x480x16 V7VGA
-
-
- Update 1.1 * BUGFIX: EGA palette was being saved using VGA routines
- resulting in the wrong colors being saved in 640x350x16;
- this has been corrected.
-
- * BUGFIXES: TOTAL OVERHAUL OF SVGA 1024x768x16 BANK
- SWITCHING CODE.
-
- * HARDCODED, SPECIFIC READ/WRITE BANK SWITCHING 1024x768x16
- ROUTINES TO SUPPORT THE FOLLOWING CHIPSETS:
-
- ATI --------------- Tatung,Altec,Gateway,TeleMart,TriStar...
- AheadB ------------ VGA Wizard
- Tseng 4000 -------- STB 4000,Orchid Pro II,
- Boca,Sigma Legend,...
- Tseng 3000 -------- STB,Sigma,Orchid,Willow,Genoa 5x00,...
- Paradise ---------- AST,ARC,AT&T,CompuAdd,Compaq,old Dell,
- DEC,Epson,NCR,Olivetti,Tandy,Toshiba...
- Video7 ------------ new Dell,Video7 FW/VRAM...
- Video7/Headlands -- Video7 1024i
- Genoa GVGA -------- Genoa 6100,6200,6300,6400,6600
- C&T 452/453 ------- Cardinal,MK82452,Data General...
- Trident 8800/8900 - Imtec,Logix,Maxon,Prism,Zymos,HiRes...
- Everex EV678 ------ Everex Viewpoint
- Everex VRAM
- Everex EV673
- Oak
- Tecmar VGA/AD
-
- * TOTAL OVERHAUL OF ALL EEGA and SVGA *.CFG FILES.
-
-
-