SE/30 won't boot with IIsi or IIfx ROM SIMMs - Hacks stalled

[Trash80toHP_Mini]

Title pretty much says it all, very strange, I thought it should "just work" from what I'd read on gamba. Don't have one, but the IIci ROM PCB trag built seems to imply that that ROM SIMM should work as well? gamba's OS8 on SE/30 only mentioned requiring IIsi or IIfx ROM SIMMs.

Both ROMs exhibit video output the mashup very similar , if not identical to what I got when the IIsi NuBus Adapter was installed. Pic's from that thread.

/monthly_01_2017/post-902-0-03824800-1485112623.jpg">View attachment 11409

IIsi ROM SIMM - No bong - but it does hit the HDD after a bit.

IIfx ROM SIMM - Startup Bong - pause - Five note error message (memory?) and hits the HDD after a bit.

What gives? Does a IIci ROM work in the SE/30?

Next test will be pulling the Video ROM to see what happens with each SIMM..

 

[Bolle]

Should just work. I have tried a stock IIsi ROM in one of mine and everything was fine. How much RAM do you have in there?

I can try a IIci ROM if you want.

Stupid question: are you sure the SIMM is properly seated? The SE/30 slot is supposed to be somewhat out of spec compared to all other ROM slots. Try pushing in the SIMM and holding it in while starting up the machine and see if that changes anything.

 

[Trash80toHP_Mini]

Thanks for confirming that, in my SE/30 it doesn't just work for some reason to be determined.

I've been seating all three SIMMs firmly.

I get two different, repeatable results depending upon which of the known compatible ROM SIMMs is installed.

IIfx ROM SIMM is an Apple part straight from my pet IIfx.

IIsi ROM is on a dougg3 card, early oP/Jolly Roger vintage. Known good in IIsi.

Just noticed a VERY strange symptom(?) I'll need to check for repeatability/fluke status

--- Installed the PRAM battery and set date/time yesterday.

----- 10.13.17    5:20PM - reading on SE/30

----- 10.14.17  10:09AM - reading on iPhone

So in the process of whacking on it repeatably, my SE/30 lost 16 hours, 50 minutes +-30 seconds (by unconfirmed caffeine starved wetware FPU computation) so it's obviously not a simple 12 hour AM/PM status error.

I've got a pair of early, pre-pirated dougg3 ROM SIMMs with a couple of different ROMs on board and another two sets of ROMs in tubes to try. We were testing different ROMs in the IIsi for some reason or other. If I find the paper with the specs on the sets it would help a lot. :

Pretty sure there are IIci and IIfx ROMs to try along with IIvi(?) in the mix. IIci went down the storage room whirlpool so I've been trying to source a logic board for PowerCache playtime. Search priority just got bumped a couple of states, anybody got a spare one FS/T?

Please do test the IIci ROM, I find the ambiguity in the gamba articles is most curious. trag, can you shed any light on that?

 

[Trash80toHP_Mini]

I should mention that I got a random error of some kind at some point before I started playing musical ROMs. Might have been an "unimplemented trap" system freeze error when no software was running of all things. All I remember is that I'd left the "open air" testbed setup running longer than usual when it happened.

 

[aplmak]

Maybe I read that wrong.. "all three SIMMS"... You do know you need at least 4 RAM SIMMS installed for it to work properly.. Just for the heck of it check your RAM configuration and definitely reseat the ROM SIMM..

Does it work with the original dirty ROM the SE/30 came with?

 

[Trash80toHP_Mini]

"three simms" = SE/30's working SIMM + SIMM from my IIfx + Known good set of IIsi ROMs on Rev.2 dougg3 Pirate SIMM

On a lark I pulled the ROM SIMM from the DOA/30 and it works just fine. Odd, I hadn't known of a 2 ROM SIMM other than BMOW's licensed Mac ROM-inator II rework of dougg3's 4 ROM. design. TattleTech says version specs are identical between types.

SE/30 (working) ROM SIMM top



DOA/30 ROM SIMM bottom - works in the working SE/30

__________________________________

I turned off a ton of extensions, but those shouldn't matter at this point of the bomb process, its not POSTing.

Got bong and 5 tone error death knell with the IIsi Pirate SIMM just now; same as I got repeatedly with the IIfx ROM SIMM yesterday.

Tried repeating the error and now I get five tone death knell right off the bat.

Curiouser and curiouser, gotta work up rigorous testing procedures, but that sounds a bit too much like work ATM. :

__________________________________

Eight 1MB DRAM SIMMs currently installed.

System 7.5.5 - probably need to turn off VM next

I've been fabbing a PSU mounted drive sled setup to run one of my 2.5" Savvio SCA drives off an aux lump-onna-rope inmy "open aid SE/30 testbed, Fine tuning a dedicated drive with beaucoups system partitions for ProtoCache1 development, PowerCache shenanigans and Project30 insanity should make things a lot more convenient all around.

 

[Trash80toHP_Mini]

Project back burnered: ROM-inator II SIMM order just placed. [] ]'>

 

[Trash80toHP_Mini]

Just read BMOW's ROM-inator II SIMM module instructions. 7.5.5 could be the problem, dunno, but great troubleshooting info. Glad to read my notion for shimming the SIMM with a thin plasitc cutout was a good idea!

 

[trag]

Please do test the IIci ROM, I find the ambiguity in the gamba articles is most curious. trag, can you shed any light on that?

No, not really.   The Gamba information on using the IIsi and IIfx ROM was all written before we did our IIci ROM experiment.  As far as I know, Gamba built the module (I just provided the chips and some information) tested it, and it worked.

That 2-chip ROM module looks like it's built on the PSOP chips (perhaps lower capacity though) found on the later NuBus PPC and later ROM modules.  The chips are 16 bits wide, so you only need two of them on a 32 bit wide ROM module.  The one's on the PPC ROMs are 8Mb, so four of them provide 4 MB of capacity and two of them provide 2 MB of capacity.  I imagine on the SE/30, they'd use a 2Mb or even 1 Mb capacity in the PSOP package.  It would be interesting to see what chip part numbers are under the little white stickers.

 

[Trash80toHP_Mini]

Then I'll peel one off! I'm liking the thinner, lower profile form factor. Should make for less physical interference for piling expansion crap into the PDS in its stock state. [] ]'> I'm currently working from gamba's info BMOW's hosting in the instructions for his Mac ROM-inator II. One's heading my way soon, so we'll see what happens. 

If you've got experience to help out with the multiple card TTL line driver limitation issues or the 12V->5V stepdown aux. power connector lines of approach for the ProtoCache1 project, PLEASE jump into the fray my friend!

BTW, has anyone else got an example of this SIMM?

 

[Trash80toHP_Mini]

 

[trag]

Looks like a 1Mb Toshiba chip.  I don't know which series '53' is so I don't know if that's a ROM, EPROM, EEPROM, etc.   Doesn't really matter as the pinout is a JDEC standard, except for possible Vpp or Reset pins, but those only matter if you want to reprogram the chips anyway.  Reset pins can be a joker (some Flash/EEPROMs have them, some don't) because they must be held high in order to *Read* the chips.

Anyway, two of those gives you a 2 X 1Mb = 2Mb = 256KB ROM module (2Mb / 8 = 256KB).

That's a 20 pin PSOP.  The higher capacity chips on the PowerPC ROMs are 44 pin PSOP.

Do you have a place you're looking at installing those chips or are you just admiring the low form factor?

The TSOP Flash such as are used on the 8MB ROMinator should be flatter still, though.

 

[Trash80toHP_Mini]

Do you have a place you're looking at installing those chips or are you just admiring the low form factor?

The TSOP Flash such as are used on the 8MB ROMinator should be flatter still, though.

I'm just admiring an example of what I'm guessing may be an uncommon version of the SE/30 ROM SIMM. Anybody got a read on that?

Decided I've got an ailing logic board on my hands here. I'm loving BMOW's universal Mac II series ROM SIMM, but it gives the same results as IIsi and IIfx ROMs in this ailing puppy,.

Issues with the board are VERY strange so far, but I'll need to find a known good PRAM bat to recheck inexplicably erratic timekeeping, the bat I pulled from the IIcx has flatlined. 

 

[Trash80toHP_Mini]

Ran across another manual inject FDD whilst rummaging and re-arranging and recycling extraneous bits and pieces.It's working perfectly in this testbed config. Another one had me wondering, but it wasn't the Logic Board after all. One possible ailment off the diagnostics list! [] ]'>

 

[trag]

Should have written 40 pin above, where I wrote 20 pin.   Counted the pins down one side and forgot to multiply by two probably.