First post, by AST-AUTISMO
- Rank
- Newbie
Hi all,
After a successful CPU upgrade to a Pentium 200, I'm looking at the next thing to boost this old machine's performance: Installation of 1MB of additional video memory. There are two unpopulated sockets on the board .
This upgrade will yield 2MB of video memory and (apparently) allow the Mach 64 to switch to 64-bit mode which will hopefully provide a performance boost. (Maybe wishful thinking though - Duke Nukem 3D at 640x480 runs really badly with the uniVBE driver and the machine locks up as the game starts when ATI's VBE driver is loaded. A similar vintage machine with onboard S3 Trio for example is silky smooth at 640x480 so I'm hoping to replicate that.)
Currently the board has two HY514260B JC-60 modules soldered on. From my research these are 256K x 16-bit FPM modules at 60ns (what i infer from JC-60, but they may be 50ns capable....).
Questions:
Assuming we stick with 256k x 16 chips which is mandatory
- Will EDO modules work interchangeably with the existing FPM modules?
- Will 50ns parts work interchangeably with the existing (i'm guessing) 60ns modules?
- Are there any other specifications to look for in terms of compatibility?
- Are there any brands or specifications to avoid?
- What are the odds this upgrade will speed up the bad VBE performance?