ROM upgrade ordering

[CommodoreDecker]

So I'm upgrading my 1040STFM to the Rainbow 1.4 version -- the socketed chips have a numerical order, but I'm not sure which is supposed to be 'lo' and which is 'hi'. 

 

If the ROMs are placed in the wrong sockets, but otherwise in correct orientation (the notch in the middle-left lining up with the socket), can they be repositioned if I get the order wrong?

 

 

Edited September 15, 2023 by CommodoreDecker

[snarkdluG]

CO26160 ST U.S. TOS 1.0 256K (H2) ROM
CO26161 ST U.S. TOS 1.0 256K (H1) ROM
CO26162 ST U.S. TOS 1.0 256K (H0) ROM
CO26163 ST U.S. TOS 1.0 256K (L2) ROM
CO26164 ST U.S. TOS 1.0 256K (L1) ROM
CO26165 ST U.S. TOS 1.0 256K (L0) ROM

[guus.assmann]

And also, yes, the computer won't start if you have them wrong.

But it will not do any harm.

 

BR/

Guus

[macsonny]

On 9/16/2023 at 7:17 AM, CommodoreDecker said:

So I'm upgrading my 1040STFM to the Rainbow 1.4 version -- the socketed chips have a numerical order, but I'm not sure which is supposed to be 'lo' and which is 'hi'. 

 

If the ROMs are placed in the wrong sockets, but otherwise in correct orientation (the notch in the middle-left lining up with the socket), can they be repositioned if I get the order wrong?

 

 

Can the 1.4 TOS ROMs be downloaded and if so, what EEPROM size do they need to be burnt onto?

[TGB1718]

You need EPROM's 27C256 (32K) * 6

 

You may have to set some jumpers, can't remember, sure someone else will know for certain.

 

I think these are the ones I used in my 520STM

 

STROM.zip

[CommodoreDecker]

Thanks much!

 

I've got the ROMs swapped out. Will test this weekend, but it's great to read there's no harm if I put U2 in U5's place.