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Author Topic: Using Compact Flash instead of SRAM over PCMCIA  (Read 2911 times)

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Offline brownb2Topic starter

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Using Compact Flash instead of SRAM over PCMCIA
« on: September 04, 2010, 02:11:15 AM »
As it's possible to use a CF card in a PCMCIA adapter is it possible to configure a CF card (or portion) as 16bit RAM? Is there any special software (or in development...) to do this?

I'm guessing as the CF is really implementing the IDE transfer standard and not presenting itself to the miggy as a a simple memory mapped region this might prevent the above... but I'd like to know for certain. :)
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Offline mongo

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Re: Using Compact Flash instead of SRAM over PCMCIA
« Reply #1 on: September 04, 2010, 02:57:52 AM »
You can not use Flash RAM as RAM.
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Offline brownb2Topic starter

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Re: Using Compact Flash instead of SRAM over PCMCIA
« Reply #2 on: September 04, 2010, 03:11:39 AM »
Quote from: mongo;577650
You can not use Flash RAM as RAM.

Well to be finicky I probably can... albeit using an MMU and a swap partition or file. Shame it can't be done without this as it would have been a real boon for A600 owners.
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A600 2MB Chip, 4MB PCMCIA, 11MB Fast, ACA-620 OC 680EC20@25MHz, RTC, 512MB CF
A1200 - 2MB Chip 8MB Fast, MTEC Viper 68030@42MHz MMU, 68882 FPU, RTC, 1GB CF
AmigaKit A600GS
Retro Games A500 Mini
Atari 520 STFM - 1MB, Multiface ST.
Commodore 16 - 64K Mod, SD2IEC Drive
Commodore 64C - 64K, SD2IEC Drive
ZX Spectrum 48K Rubber Keys
 

Offline mongo

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Re: Using Compact Flash instead of SRAM over PCMCIA
« Reply #3 on: September 04, 2010, 03:25:33 AM »
Quote from: brownb2;577653
Well to be finicky I probably can... albeit using an MMU and a swap partition or file. Shame it can't be done without this as it would have been a real boon for A600 owners.


Virtual memory is not RAM.
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Offline brownb2Topic starter

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Re: Using Compact Flash instead of SRAM over PCMCIA
« Reply #4 on: September 04, 2010, 04:03:25 AM »
Quote from: mongo;577654
Virtual memory is not RAM.

..and coconuts don't migrate unless they are carried by an African swallow.
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A600 2MB Chip, 4MB PCMCIA, 11MB Fast, ACA-620 OC 680EC20@25MHz, RTC, 512MB CF
A1200 - 2MB Chip 8MB Fast, MTEC Viper 68030@42MHz MMU, 68882 FPU, RTC, 1GB CF
AmigaKit A600GS
Retro Games A500 Mini
Atari 520 STFM - 1MB, Multiface ST.
Commodore 16 - 64K Mod, SD2IEC Drive
Commodore 64C - 64K, SD2IEC Drive
ZX Spectrum 48K Rubber Keys
 

Offline Khephren

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Re: Using Compact Flash instead of SRAM over PCMCIA
« Reply #5 on: September 20, 2010, 10:08:27 PM »
I think you need an MMU for virtual memory programs on the amiga, which a 68000 does not have :(
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Offline SamuraiCrow

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Re: Using Compact Flash instead of SRAM over PCMCIA
« Reply #6 on: September 21, 2010, 05:18:03 PM »
Quote from: brownb2;577653
Well to be finicky I probably can... albeit using an MMU and a swap partition or file. Shame it can't be done without this as it would have been a real boon for A600 owners.


There is no way to connect an MMU to an A600.  If you had an accelerator card for the A600, you'd probably have memory connected to it anyway so the MMU still would only help you for running diagnostic programs to develop software.
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