You will not be able to post if you are still using Microsoft email addresses such as Hotmail etc
See here for more information viewtopic.php?f=20&t=7296
DO NOT USE DEVICES WHERE THE IP CHANGES CONSTANTLY!
At this time it is unfortunately not possible to white list users when your IP changes constantly.
You may inadvertently get banned because a previous attack may have used the IP you are now on.
So I suggest people only use fixed IP address devices until I can think of a solution for this problem!

STF 6 CHIP ROM LOCATIONS

Upgrade or replace the ROM.
Post Reply
User avatar
exxos
Site Admin
Site Admin
Posts: 27283
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:
Contact exxos

STF 6 CHIP ROM LOCATIONS

Post by exxos »

Just a quick post to document the locations of the ROM's under the PSU.. I find it confusing what ROM goes where, so here's where they all go!

Some older machines have 6 chip TOS installed. Generally I would recommend using one of my TOS adapters and upgrading to TOS104. However on some machines it is not always possible.

As there are 2 basic versions of TOS location , here is a conversion. The left numbers are taken with TOS under the PSU. The last numbers are TOS located on the left of the motherboard. Also see images below.

U4 = HI 0 - U63
U7 = LO 0- U67
U3 = HI 1- U59
U6 = LO 1- U62
U2 = HI 2- U48
U5 = LO 2- U53

6chip.jpg
6chip.jpg (298.58 KiB) Viewed 4165 times
Top
tzok
Posts: 338
Joined: Sat Dec 30, 2017 2:27 pm

Re: STF 6 CHIP ROM LOCATIONS

Post by tzok »

This is a TOS ROM chip layout for 520ST:
520ST ROM layout
520ST ROM layout
520ST.jpg (252.64 KiB) Viewed 3495 times
Top
Post Reply

Return to “ROM UPGRADES”