User avatar
TommyE

Posted Wed Jan 20, 2021 9:54 am

eugenenine wrote:
Thu Jan 16, 2020 8:30 am
Where does kickstart load on a PAL machine then? And if I mount a kickstart rom can I remove the daughter board?
The daughterboard is «moved» into the mainboard so the pal and ntsc machines have the same way of losding the kickstart.

I do not think your a1000 will work at all if you remove the daughterboard, even if you put in a kickrom adapter.

/Tommy

User avatar
intric8
Seattle, WA, USA
Website

Posted Wed Jan 20, 2021 10:51 am

@eugenenine

You can only remove the daughterboard if you replace it with something like the Rejuvenator.

User avatar
Christian

Posted Wed Jan 20, 2021 11:03 pm

It is possible to remove the daughterboard on the A1000 Rev 6 and Rev A motherboards and to install four 27C512 EPROMs - two sockets already hold the A1000 boot roms and there are two additional sockets below. Without any further hacks, that means only 256 KB kickstarts (i.e. up to 1.3 or 1.4 Alpha 15). Two of the PALs need to be transplanted from the daughterboard to the motherboard (the locations are marked on the motherboard with the chip types - I think one is 74F257 - I can look it up and also get the exact locations). These two locations have the posts that go to the daughterboard and must obviously be removed. The other posts should also be removed. Finally, some pads need to have traces cut and jumpered with a blob of solder the other way.

User avatar
maurensen

Posted Thu Jan 21, 2021 4:22 am

Hi,
I have a 1000 Revision A with doughterboard, now I don't have the time to re-open the case to see the serial. I've added an external HC520 classic expansione

User avatar
TommyE

Posted Thu Jan 21, 2021 12:41 pm

Christian wrote:
Wed Jan 20, 2021 11:03 pm
It is possible to remove the daughterboard on the A1000 Rev 6 and Rev A motherboards and to install four 27C512 EPROMs - two sockets already hold the A1000 boot roms and there are two additional sockets below. Without any further hacks, that means only 256 KB kickstarts (i.e. up to 1.3 or 1.4 Alpha 15). Two of the PALs need to be transplanted from the daughterboard to the motherboard (the locations are marked on the motherboard with the chip types - I think one is 74F257 - I can look it up and also get the exact locations). These two locations have the posts that go to the daughterboard and must obviously be removed. The other posts should also be removed. Finally, some pads need to have traces cut and jumpered with a blob of solder the other way.
Cool, makes me wonder... Can I somehow then use the kickstart ram as normal ram when using kickrom adapter?

I imagine I then could have 256kb ram extra.

TommyE

User avatar
BloodyCactus
Lexington VA
Website

Posted Fri Jan 22, 2021 9:22 pm

maurensen wrote:
Thu Jan 21, 2021 4:22 am
I have a 1000 Revision A with doughterboard, now I don't have the time to re-open the case to see the serial.
the serial is on the back of the case underneath.

User avatar
blakespot

Posted Sat Jan 23, 2021 4:12 pm

Reporting Serial No. XM1193659 (NTSC)
Motherboard: Rev A - 327049-01


bp

User avatar
miraco
Louisville Ky

Posted Fri Mar 12, 2021 4:37 pm

Serial No. XM1101772(NTSC)
Motherboard: Rev 6 - 327049-01

Serial No. XM1186309 (NTSC)
Motherboard: Rev A - 327049-01

User avatar
BloodyCactus
Lexington VA
Website

Posted Fri Mar 12, 2021 8:21 pm

miraco wrote:
Fri Mar 12, 2021 4:37 pm
Serial No. XM1101772(NTSC)
Motherboard: Rev 6 - 327049-01
Wow! A rev 6 in a XM11 case strikes me as a very odd combination!

User avatar
Fantomen

Posted Fri Apr 16, 2021 12:42 am

Hi.
I have an A1000 that I purchased in Sweden. I can’t remember what year… 85-87?
Serial number: XM4004538N
It has the daughterboard.





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