Can new PLCC chips be programmed for the SE/30 ?

[Steve Rieck]

Apologies if this has been covered but I can't find the info. New to this one. Would be nice to have extras of course. Especially interested in the GLU and SWIM chips. I believe the other PLCC mounted chips can be replaced off the shelf or are otherwise available?

 

[Kai Robinson]

Apologies if this has been covered but I can't find the info. New to this one. Would be nice to have extras of course. Especially interested in the GLU and SWIM chips. I believe the other PLCC mounted chips can be replaced off the shelf or are otherwise available?

Well the SE/30 has a few options for programmable ROM SIMMs - the EPROM on the board is the video ROM.

 

[Steve Rieck]

Well the SE/30 has a few options for programmable ROM SIMMs - the EPROM on the board is the video ROM.

oh I see. yes, I was using the wrong term. Are GLU and SWIM chips for the SE/30 only available from salvaged boards? I guess other SE/30s and Mac II ? No way to make modern equivalants?

 

[Kai Robinson]

Correct - GLU is a custom ASIC (VTI Gate Array), SWIM is a custom ASIC, the ASC is a custom ASIC, the SND has been reverse engineered, the RTC too, the VIA chips are merely 65C22N's from WDC, the GAL's have been reverse engineered and made available and the rest is off the shelf.

 

[Kai Robinson]

Just as a curio: https://siliconpr0n.org/archive/doku.php?id=bercovici:apple:344s0602-a

Thats the die image of the VTi (VLSI) Gate Array (it's a VGC1900 series part), only 858MB!

 

[Steve Rieck]

the ASC is a custom ASIC, the SND has been reverse engineered

By SND do you mean the Sony chips or the ASC itself? Are these for sale anywhere? Thanks.

 

[robin-fo]

The Sony SND chips are the two DIP ICs at UB10 and UB11. They are mainly interesting because they trigger the initial reset of the system when power is first applied. They have been reverse engineered since they are not very complicated.

The ASC is that PLCC chip labelled 344S0063-A

 

[Steve Rieck]

The Sony SND chips are the two DIP ICs at UB10 and UB11. They are mainly interesting because they trigger the initial reset of the system when power is first applied. They have been reverse engineered since they are not very complicated.

The ASC is that PLCC chip labelled 344S0063-A

right. so my understanding is the proprietary chips are the GLU, SWIM and ASC. The only way to get these is to take them off of old boards. Are the ones on a IIcx or similar Mac II's compatible with an SE/30? I would assume the GLU is not?

 

[Kai Robinson]

Hi Steve - hope you don't mind me undeleting this - it's a valid question that others might find useful to leave up and around.

Also the IIx and IIcx GLUE is the same, iirc, as the SE/30 is a IIcx in a compact chassis with 1-bit video.

 

[Steve Rieck]

Hi Steve - hope you don't mind me undeleting this - it's a valid question that others might find useful to leave up and around.

Also the IIx and IIcx GLUE is the same, iirc, as the SE/30 is a IIcx in a compact chassis with 1-bit video.

good news, so if I do need to replace the SE/30 GLUE, I could take it off IIx or IIcx board just as well.

 

[wottle]

good news, so if I do need to replace the SE/30 GLUE, I could take it off IIx or IIcx board just as well.

If you need a GLUE chip from a Iicx, I have a battery bombed board where the GLUE chip and the SWIM chip look to be in pretty good shape. Unfortunately, wasn't able to test this board because it had so much battery damage. But the Glue chip looks good. The SWIM chip could also be usable, although there was some corrosion nearby I tried to get off. But it shares the same chip marking (344S0061-1) as the one from the SE/30.

Not trying to upsell you after I sold you the SE/30 reloaded board, but it may help try to narrow down your issue. I really wish the GLUE has been able to be socketed. or I could remove it and test it in mine.

Here's some details: https://www.inventorydifferent.com/#!/devices/store/345

 

[Steve Rieck]

If you need a GLUE chip from a Iicx, I have a battery bombed board where the GLUE chip and the SWIM chip look to be in pretty good shape. Unfortunately, wasn't able to test this board because it had so much battery damage. But the Glue chip looks good. The SWIM chip could also be usable, although there was some corrosion nearby I tried to get off. But it shares the same chip marking (344S0061-1) as the one from the SE/30.

Not trying to upsell you after I sold you the SE/30 reloaded board, but it may help try to narrow down your issue. I really wish the GLUE has been able to be socketed. or I could remove it and test it in mine.

Here's some details: https://www.inventorydifferent.com/#!/devices/store/345

totally appreciated. I'm gonna do some tests and let you know if I wanna buy them if you're selling.

 

[Steve Rieck]

If you need a GLUE chip from a Iicx, I have a battery bombed board where the GLUE chip and the SWIM chip look to be in pretty good shape. Unfortunately, wasn't able to test this board because it had so much battery damage. But the Glue chip looks good. The SWIM chip could also be usable, although there was some corrosion nearby I tried to get off. But it shares the same chip marking (344S0061-1) as the one from the SE/30.

Not trying to upsell you after I sold you the SE/30 reloaded board, but it may help try to narrow down your issue. I really wish the GLUE has been able to be socketed. or I could remove it and test it in mine.

Here's some details: https://www.inventorydifferent.com/#!/devices/store/345

One thing I really don't understand is since I can consistently get a distorted death chime (with the NMI), does that mean the GLU, CPU, Clock and ROM are ok? or could they still be partially damaged and still need to be replaced?

Obviously, something is failing in the self test but can I exclude those?

 

[Kai Robinson]

I'd imagine the ROM is fine, given the death chime. When my Iifx went wonky, turned out to be poor oscillator connection and clock signal.

 

[Steve Rieck]

I'd imagine the ROM is fine, given the death chime. When my Iifx went wonky, turned out to be poor oscillator connection and clock signal.

Thanks. Will check oscillator and clock...Do you think I can make any conclusion about the GLU and CPU other than they are somewhat working? Or does the death chime imply that those are fully ok?

 

[Kai Robinson]

If CPU wasn't working you wouldn't be getting a chime, likewise with the GLU - honestly i think it's either RAM MUX/resistor packs, something to do with the PAL logic.

 

[Steve Rieck]

If CPU wasn't working you wouldn't be getting a chime, likewise with the GLU - honestly i think it's either RAM MUX/resistor packs, something to do with the PAL logic.

Thanks so much for your expertise Kai. Will go through those next. I really appreciate the help!