U2 HI2
U3 HI1
U4 HI0
U5 LO2
U6 LO1
U7 LO0
Or like this
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STM C070243 Rev F Rom locations.
STM C070243 Rev F Rom locations.
Just thought I'd put this here for a quick visual indication of the tos1.04 6 rom locations in case anyone else needs to know.
U2 HI2
U3 HI1
U4 HI0
U5 LO2
U6 LO1
U7 LO0
Or like this
U2 HI2
U3 HI1
U4 HI0
U5 LO2
U6 LO1
U7 LO0
Or like this
If it ain't broke, test it to Destruction.
-
davemacblack
- Posts: 14
- Joined: Fri Sep 15, 2017 11:53 am
Re: STM C070243 Rev F Rom locations.
This is exactly what I did on my 260ST yesterday - upgrade from 6x original ROM TOS 1.0 to 6x 27C256 TOS 1.04 
. Thanks to the fact that it was a replacement of ROM chips 1: 1, everything went well. I also tried TOS 1.04 on 2x 27C512 in positions Lo0 and Hi0, but it didn't work for me. I also tried to return this machine to prehistoric times BOOTLOAD ROM with 2x 27C64, but also without success. Does anyone know if there is also a solder box on the board that will change the ROM configuration, such as STE W101, W102 and W103 and MSTE W201, W202 and W203?
. Thanks to the fact that it was a replacement of ROM chips 1: 1, everything went well. I also tried TOS 1.04 on 2x 27C512 in positions Lo0 and Hi0, but it didn't work for me. I also tried to return this machine to prehistoric times BOOTLOAD ROM with 2x 27C64, but also without success. Does anyone know if there is also a solder box on the board that will change the ROM configuration, such as STE W101, W102 and W103 and MSTE W201, W202 and W203?
Re: STM C070243 Rev F Rom locations.
A lot of this info is on my site https://www.exxosforum.co.uk/atari/last/tos/index.htm