Install NVDI5 with the screensys driver in the GEMSYS Folder disable by rename these to *.syz ...

NVDI must run after sta_vdi.prg and you becomes 200% speed from the Nova driver ...

Nice ...

How did you make it possible to make games run on the et4000 graphics card and the 060 CPU? Is it an ST-Low resolution?

@agranlund ... is there a TSENG ET4000AX ISA graphiccard in the first ISA slot? Use you the Atari Nova driver or NVDI ET4000 for it?

rubber_jonnie wrote: ↑Mon Mar 04, 2024 11:18 am It looks to be the same REV as the OP, so there may well be jumpers/pads on this variant to allow 2 ROM sets.

Yes, there is a 74LS11 for the 2 chip Eprom config ...

rubber_jonnie wrote: ↑Mon Mar 04, 2024 10:40 am But would that affect the oscillator circuit? Surely that just requires power to provide the clock signals and nothing from the OS?

No but boot up with a white screen this is because no 6 chip TOS is installed. I think because of the white screen the clock on the shifter is ok ...

All STM mainboards are for 6 chip TOS only isn't it ...

I had installed gold-plated Atari PLCC sockets from BEST ...

Atari MegaSTE, Atari TT and Atari Falcon can handle normal PC Floppy drives. You must set der Floppy to DriveSelect 0 and you have to put in a Atari AJAX Floppy Controller Chip in. The DIP switch 7 set to ON select the HD Mode ...

I still had an ICD box from a micro adapter and this sheet metal was included I think. No idea how it fit ?

Back then, Hard&Soft also had a set for the Atari Mega ST including a sheet metal plate including spacer bolts. There are numerous mounting holes in the manboard, for example for a graphics card. The 3.5 Zoll SCSI hard drive was rotated 90 degrees next to the floppy in the front left area of the...