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Author Topic: AddMem  (Read 3675 times)

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Offline Doobrey

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Re: AddMem
« on: February 26, 2006, 01:23:18 PM »
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leofoe wrote:
I have an A1000 with a trapdoor RAM-expansion and also a half meg extra RAM soldered on the existing chips. The latter is added with the AddMem program in the startup-sequence at location $80000-$FFFFF.


What Kickstart are you using?
I just looked at exec 1.2 (v33.192) and the chip mem routine in that will search for upto 2mb of chip mem, so if the hack is done right you should be seeing 1mb of chip mem without using AddMem.
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Offline Doobrey

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Re: AddMem
« Reply #1 on: February 26, 2006, 05:27:19 PM »
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Zac67 wrote:
... and without actually making it chip mem. The old (8367?) Agnus can't use more than 512 KB as chip RAM, so Amy would crash very soon...


True.. so I guess it begs the question of how the hack generates the RAS/CAS signals for the area passed to AddMem.
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Offline Doobrey

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Re: AddMem
« Reply #2 on: February 26, 2006, 05:28:49 PM »
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leofoe wrote:
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Zac67 wrote:
I would've thought this is possible...
$80000 is just behind the 512 KB chip mem and the A590's RAM should start at $200000 - could you verify this?

How do I do that?


ShowConfig or SysInfo will show the locations of all memory in the system.
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