Author
| Slotexpanderproblems ??
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legacy
msx professional
Posts: 516 |  Posted: February 28 2005, 22:29 |
Is it normal if I connect a at powersupply to a slotexpander (sunrise) and to the MSX , and i switch the expander on, than the MSX starts too ?
I try this with 2 powersupplys on a MSX2 and a MSX1 , all the four cases are reacting on the same way.
The 3 jumpers they are used if the power comes from the msx are removed
The MSX1 gives a crippled screen.
After disconnecting the expander, the MSXes works normal again.
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HansO
msx addict
Posts: 375 | Posted: March 01 2005, 16:39 |
Since the slotexpander can write to the MSX al sort of inconsistent signals can appear on the databus when switching on. SO I can imagine the MSX going bananas when the slot expander is switched on/off. And I ahve seen that happen too.
It is like inserting cartridges in a powered MSX: it is going fine most of the time  but not a good idea, many MSX machines died this way.
Switch MSX and external powersupply of the slotexpander on/off at the same time.
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legacy
msx professional
Posts: 516 | Posted: March 01 2005, 17:46 |
I think that I have the solution by disconnecting the -12 volt , I hope this is enough, I'll test it a few days on a MSX1.
Anyway, I shall switch them on at the same time.
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