Blizzard 1230 board - Jumpers and libs

[Piru]

Don't use SysInfo.

[Piru]

if OS3.0 might happen to not support MMUs?

AmigaOS does not use MMU for anything. That's why it's always unused.

If you want to use it, check mmu.library

[Piru]

@rkauer

If you want your Amiga a bit faster, put this line very early in your startup-sequence:

"CPU fastROM" (no quotes)

No. This is for the lame non-phase5 accelerators. Phase5 users should use MAPROM feature. Phase5 MAPROM does not use MMU at all, and thus leaves MMU free for other uses (+ it also works with CPUs without MMU, such as EC030).

[Piru]

@Hodgkinson

Dont you need a MMU for your PCMCIA port to work correctly when >4MB of RAM is installed?

No.

Im wondering wether the MMU "Not in use" might explain why the PCMCIA port on the tower is being crippled

No.

Shouldn't the MMU remap the memory to prevent this from happening?

No.

[Piru]

What if the 64MB of memory is on the accelerator board?

64MB of memory suggests that the memory is mapped to 32bit area. Which basically means it will not conflict with the PCMCIA port.

Could the MMU (In the 68030 on the same board) sort it out???

No. MMU cannot remedy the problem. MMU cannot change physical mapping, only logical. The board must put the memory to 32bit area, that is the only way to fix it. Only lame 020 and 030 accelerators have this problem anyway, for example all Phase5 030 boards are free of this problem (with or without MMU).

[Piru]

Well, then your PCMCIA port is working just fine.

Assuming the port/mobo is physically ok that is.

[Piru]

@Hodgkinson

One last question - Any idea what the "8MB RAM" jumper on a Blizzard 1200/4 RAM board supposed to do? I thought this board only had 4MB of RAM? Would it be for an add-on RAM card?

Yes:

An additional 4MB expansion called the Blizzard 1220/4/ADD4 was available for this card, allowing you to add up to 8MB in total

NOTE: Using full 8MB with this board disables the PCMCIA port. 4MB should be fine, however.

[Piru]

Reading the hardware description:

** If an A3000/A4000 accelerator is used then the Zorro slots are capable of functioning as Zorro III slots, however if an A1200 accelerator is used then they can only be used as Zorro II slots.

This might have something to do with it, as the Zorro II primary 8MB auto-config space overlaps with the PCMCIA memory area. However, IMO for the PCMCIA port to shut down, it would require that some Zorro card appears at 0x600000 area.

Anyway, it'd be quite easy to test it: Just set up the system without the Z3i-board and see if the PCMCIA port works then.

the 6860 PCI board

I wouldn't call it PCI board really, as the Mikronik Z3i PCI slots are inactive.