520 ST ROM chips

[alexh]

Quick question. Are all 520 ST (shorty, no PSU, no modulator, no floppy) fitted with sockets on the ROM chips? And are they all 6-chip ROMs? I only ask because mine has TOS1.0 and I am thinking about getting TOS1.04 for improved HDD support.

[exxos]

AFAIK they all 6 chip in sockets.

[DoG]

Very rarely they don't have all sockets. But that would be extremely unlucky. But that is the latest rev of the shorty ST.

[stephen_usher]

My 520STM (1988 vintage) is two chips in sockets. It came with TOS 1.02.

[Steve]

I think it's the very last revision... is it rev K? That allows 2 ROM's for TOS. Agranlund's is like that. It has the solder pads at the bottom where you can change between 2 or 6 chips. Otherwise you're stuck with 6. I personally wrote EmuTOS to 6 roms for my little shorty, nice to have an internal hard disk driver for external ACSI drives and such. But I understand if it's going to be a gaming machine you might want 1.04. But I think most HDD patched games run fine on EmuTOS in my experience.

edit: Here's my shorty getting a picopsu installed: viewtopic.php?f=9&t=4617

It has exxos 4mb upgrade, Emutos, RGBtoHDMI and Exxos 16mb booster. Also installed an internal Gotek!

and edit2: Here's me installing the Gotek: viewtopic.php?f=18&t=5174

Here's an overview of my machine:

PXL_20220221_195737023.jpg

[ijor]

If it has no modulator doesn't than mean it is a very early model anyway?