@8002.ADF SuperVGA/MC Display Adapter, Ver. 3.0
@8002.ADF AHEAD SYSTEMS INC., VGA ENHANCER-Z, Rev. A (rename)
@8202.ADF AHEAD SYSTEMS INC., VGA ENHANCER-Z, Rev. A
Ahead VGA Enhancer Z Manual (from David Beem)
Ahead VGA Enhancer Z Utilities (from David Beem)
Ahead V5000 Programming
(extracted from Advanced Programmer's Guide to SuperVGAs)
Ahead VGA Enhancer Z
ADF Sections (both ADFs use same sections)
Ahead VGA Enhancer Z
J1 Pads for 5-pin header
SP1 Pads for "spare" IC
U1-7,14-16 Pads for additional DRAM?
U8-13 64Kx4 DRAM (different brands)
U18 Pads for unknown IC
U19 C&T F82C451 / Ahead V5000-50PC
U20 Video BIOS ROM
U22 Pads for osc (pins 1 & 3 bridged)
U27 40.000 MHz osc
U32 Pads for osc (not bridged)
W1-4 Pads for 2-pin jumpers
W5 Jumper to set adapter ID
W6 Pads for 3-pin jumper
U8-13 64Kx4 DRAM (socketed), different
brands and speeds - Micron MT4067-10, Hynix HY53C464LS-80, NEC D41464C-10, or
U19 Most cards have the VGA controller
chip labeled as Ahead V5000-50PC (rev. -A or -B). This is either a
to C&T F82C451 or perhaps even
the same chip (rebadged).
Some cards come with
the C&T variant (rev. -B) (thx David!).
W5 Sets adapter ID in case there is a
conflict. When W5 is jumpered, card ID is 8002. When W5 is open, card ID is
8202 (Ed. very naughty!).
W6 Pads for 3-pin jumper. Some boards
have pins 1 & 2 permanently bridged, on other boards pins 2 & 3 are
Note: There's no video connector on this adapter!
More info HERE.
Video ROM (dumped by David Beem)
Device: 1x 27C128 16Kx8 EPROM
VGA-Z104 PS/2 VGA ENHANCER-Z, COPYRIGHT 1989, REV 1.04
VGA-Z104E PS/2 VGA ENHANCER-Z, COPYRIGHT 1989, REV 1.04E
The Enhancer Z provides the following enhancement features in addition to
the standard IBM VGA modes:
- 16-bit high speed VGA chip
- 80 column x 34 row text (IBM 3278/79 MOD3)
- 80 column x 45 row text (IBM 3278/79 MOD4)
- 132 column x 28 row text (IBM 3278/79 MOD5)
- 132 column x 25 row text (AHEAD modes 23h and 50h)
- 132 column x 44 row text (AHEAD modes 22h and 52h)
Typical applications for these features are 132-column text for larger
Spread Sheets & Word Processing. IBM mainframe Terminal Emulations, Desktop
Publishing, CAD/CAM applications, DEC VT100, VT220, VT240, HP and Tektronix
Terminal Emulations, etc.
It also supports 640 x 480 / 256 colors, 640 x 400 / 256 colors on VGA
Optionally the VGA Enhancer Z supports 800 x 600 / 256 colors and 1024 x 768
/ 16 colors on Multisync monitors. (Ed. This
requires additional video RAM and possibly a faster base video RAMDAC?)
The VGA Enhancer Z adapter doesn't have its own RAMDAC or video connector!
It's designed to use the base video from the planar and thus must be installed
in a Micro Channel slot with the Auxiliary Video Extension (AVE).
|Model 50/50Z||Slot #3|
|Model 60/80||Slot #6|
|Model 55SX/70||Slot #1|
AdapterId 08002h and 08202h AHEAD SYSTEMS INC., VGA ENHANCER-Z, Rev. A
VGA Enhancer-Z Disable
Video BIOS ROM Address Select
The EPROM size can be either 8K (2764) or 16K (27128)
16K starting @C000h"> 0C0000h-0C3fffh, DISABLE BIOS,"BIOS
size= 8K starting @C000h" 0C0000h-0C1fffh