Blizzard 2060 memory not detected

hese · 31 January 2010, 21:08

I have a Blizzard 2060 accelerator and an Amiga 2000 rev 6 motherboard with 3.1 kickstart.

For some reason the Blizzard doesn't detect any SIMM installed onto the board.
I've tried different combinations with 4 MB, 8 MB and 16 MB SIMMs but nothing works.
The memory should be auto-detected and ready to use without any software, right?

The 68060 CPU seems to be ok, atleast cpu060 command detects the CPU correctly under AmigaOS 3.1.

Any suggestions what could be wrong here? Broken accelerator or motherboard? Incompatibility issue?

rkauer · 01 February 2010, 17:56

Or a loose/oxidised MACH chip/socket.

Buy a PLCC extractor and sack out and re-insert the MACH chips.

BTW: here is the manual

hese · 04 February 2010, 10:01

Cleaned the PLCC chips and the CPU socket but it didn't help.

Can someone explain how exactly does the memory autoconfiguring work?
What chips take part in the process and how?

rkauer · 04 February 2010, 17:23

Mostly a CPLD for clocking & RAS/CAS and some level shifters in hardware part, plus a code stored in ROM or even in the same CPLD to make a data stream to the Amiga at boot time.

hese · 05 February 2010, 08:19

And all the CPLDs and the ROM code you are referring to are located on the accelerator?

What part does the Amiga motherboard play in this?
Just polls for the data streams reported by expansion cards and maps the suitable address spaces?

Jope · 05 February 2010, 09:02

The amiga motherboard basically just provides the autoconfig signal at the start of the chain, then it contains logic chips that skip empty slots so that the cfgout signal can get to the cfgin pin of the next populated slot.

The mapping is done by logic on the plug-in card itself.

31 January 2010, 21:08	#1
hese Registered User Join Date: Sep 2008 Location: Somewhere Posts: 223	Blizzard 2060 memory not detected I have a Blizzard 2060 accelerator and an Amiga 2000 rev 6 motherboard with 3.1 kickstart. For some reason the Blizzard doesn't detect any SIMM installed onto the board. I've tried different combinations with 4 MB, 8 MB and 16 MB SIMMs but nothing works. The memory should be auto-detected and ready to use without any software, right? The 68060 CPU seems to be ok, atleast cpu060 command detects the CPU correctly under AmigaOS 3.1. Any suggestions what could be wrong here? Broken accelerator or motherboard? Incompatibility issue?

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01 February 2010, 17:56	#2
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Or a loose/oxidised MACH chip/socket. Buy a PLCC extractor and sack out and re-insert the MACH chips. BTW: here is the manual

04 February 2010, 10:01	#3
hese Registered User Join Date: Sep 2008 Location: Somewhere Posts: 223	Cleaned the PLCC chips and the CPU socket but it didn't help. Can someone explain how exactly does the memory autoconfiguring work? What chips take part in the process and how?

04 February 2010, 17:23	#4
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Mostly a CPLD for clocking & RAS/CAS and some level shifters in hardware part, plus a code stored in ROM or even in the same CPLD to make a data stream to the Amiga at boot time.

05 February 2010, 08:19	#5
hese Registered User Join Date: Sep 2008 Location: Somewhere Posts: 223	And all the CPLDs and the ROM code you are referring to are located on the accelerator? What part does the Amiga motherboard play in this? Just polls for the data streams reported by expansion cards and maps the suitable address spaces?

05 February 2010, 09:02	#6
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,861	The amiga motherboard basically just provides the autoconfig signal at the start of the chain, then it contains logic chips that skip empty slots so that the cfgout signal can get to the cfgin pin of the next populated slot. The mapping is done by logic on the plug-in card itself.

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