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19 January 2023, 21:40
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#1 |
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Registered User
Join Date: Dec 2020
Location: Italy
Posts: 1,902
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1,5 MB Chip RAM on A500 configuration
Hi Toni, i have a border question for you
i want to ask why it's not possible to set that amount of RAM on a default A500 kickstart 1.x configuration (1,5 MB CHIP) EDIT booting the system, it shows just 0,5MB the same configuration works fine with A500+, A600, A1200 and above it's maybe because it wasn't an existing possible configuration, on real hardware? Last edited by kremiso; 20 January 2023 at 13:58. |
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19 January 2023, 23:48
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#2 |
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Registered User
Join Date: Jul 2019
Location: Poland
Posts: 308
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OCS chipset has limited Chip RAM size - ECS or AGA is needed for more.
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20 January 2023, 10:06
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#3 |
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Registered User
Join Date: Dec 2020
Location: Italy
Posts: 1,902
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it's a bit strange, cause 'sliding' the WinUAE option from left to right you can set in order 256, 512, 1, 1.5, and 2MB (the CHIP bar)
and just the 1.5 does not work, i mean when booting the system A500 setting |
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20 January 2023, 12:03
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#4 |
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Registered User
Join Date: Jul 2019
Location: Poland
Posts: 308
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My A500 config with OCS shows in WB 1.3 only 0,5 MB Chip. ECS shows whatever I choose including 1,5MB...
How are you checking this? What Configuration are you setting in Quickstart panel? |
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20 January 2023, 13:59
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#5 |
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Registered User
Join Date: Dec 2020
Location: Italy
Posts: 1,902
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my bad
yes it shows just 0,5MB instead of 1,5 setting 1 or 2MB works fine instead |
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21 January 2023, 01:38
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#6 |
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Registered User
Join Date: Jul 2019
Location: Poland
Posts: 308
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Indeed, but it's enough to change OCS to ECS Agnus to make it behave as expected. No idea if it's a chipset or emulation issue. There's that 1M Chip option in Adv. Chipset settings but it's dependant on the amount of Chip you pick, not the chipset (probably to exclude impossible configurations)...
Last edited by rutra80; 21 January 2023 at 01:47. |
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21 January 2023, 11:42
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#7 |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,518
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It isn't supported, probably was not worth the trouble (non-power of 2 size) and it does not make any sense. (CPU can access all chip RAM, Agnus only sees first 512k repeated 4 times)
EDIT: I'll check this after 4.10.1 is out. Last edited by Toni Wilen; 21 January 2023 at 18:28. |
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22 January 2023, 11:56
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#8 |
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Registered User
Join Date: Dec 2020
Location: Italy
Posts: 1,902
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no problem Toni, the answer is enough thanks
just noticed this little oddity recently, attempting to made an 1,5MB hw savestate to be reloaded on a 2MB system (with ussload) |
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21 February 2023, 20:32
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#9 |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,518
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"Full" 1.5M chip ram support is done and will be in next version.
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23 February 2023, 23:41
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#10 |
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Registered User
Join Date: Dec 2020
Location: Italy
Posts: 1,902
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oh thank you, i'll made some crazy tests when released then
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