How to Prog a SX28AC chip?

[ps2mod]

Can we prog the code with only 4 wires?

Vdd, Vss, OSC1 and OSC2.

I heard that somewhere.

[LostAtC]

I posted a thread with some links for in-circuit programming using just three or four wires, from the Ubicom web site. In theory you could build your chip into a PS2 and bring out the wires via a phone jack. Then with the parallel port on your PC you could update the code without opening the PS2 again.
http://www.ps2newz.net/forums/showthread.php?s=&threadid=2941

[maltloaf]

this is exactly what I have been doing.. I have a v3 with a socketed chip and also fly leads for vss vdd osc1 osc2 and a jumper to d/c the resonator

[SonOfLiberty@w]

Hello,

Which programmer can I use to program the SX28AC? I don't want to build a fluffy2, but we have some programmerers here.

Michael

[ps2mod]

i use the laptool48.
gallap4 is also working

[grumman]

I bought a Gallep4 to program the SXs, but it only supports the early Scenix 28sx, not the newer Ubicom, I know its the same chip but the product ID has been changed so the Gallep does not recognise them. A s/w patch to upgrade the Gallep4 is due in the new year... I'm using a blitz.

[raven_m]

hey ps2mod i m also using labtool 408 for programming the chip .but i cant get the chip to work on my ps2.
can u tell me the checksum u get on ur recorder. also i only change the fuse setting before burning the chip.is there any other option to modify.

p.s:i am using sx28ac/ss

[ps2mod]

after burning the chip, u have to push the "chip/code protection" button.