First post, by Grzyb
- Rank
- Oldbie
The original ET4000 (probably the same as ET4000AX) datasheet only mentions up to 8-bpp modes - https://archive.org/download/bitsavers_tsengL … roller_1990.pdf
Early ET4000AX boards, eg. Orchid ProDesigner II, are equipped with RAMDACs like KDA0478, ie. 8-bpp.
Markings seen on the ET4000AX on such a board - "TC6058AF"
Later ET4000AX boards, eg. Orchid ProDesigner IIs, support up to 15-bpp (but not 16-bpp), with RAMDACs like SC11483, ie. 15-bpp.
Markings seen on the ET4000AX on such a board - "TC6100AF"
Even later ET4000AX boards, eg. Micro-Labs Ultimate VGA/TrueColor - http://www.microlabs.com/ut.html - support up to 24-bpp, using ATT20C490 RAMDAC.
Markings seen on the ET4000AX on such a board - "TC6100AF"
Can't find any ET4000AX chips other than TC6058AF and TC6100AF.
So...
There are probably just two variants of ET4000AX:
* 8-bpp TC6058AF
* 24-bpp TC6100AF
And boards based on the latter are often limited due to a less-than-24-bpp RAMDAC.
Nie tylko, jak widzicie, w tym trudność, że nie zdołacie wejść na moją górę, lecz i w tym, że ja do was cały zejść nie mogę, gdyż schodząc, gubię po drodze to, co miałem donieść.