[Virtualacorn-list] MDF for 2560x1440 pixel monitor

David J. Ruck druck at druck.org.uk
Sun Nov 3 13:41:25 GMT 2013

On 02/11/2013 17:57, T.O.M.S. wrote:
> We've had a query in from a keen user of VirtualRPC-AdjustSA for Macs -
> so keen that he's thinking of upgrading to a Big iMac with a 27" monitor
> (goes green with envy).
> The monitor's native resolution is 2560x1440 pixels, i.e. 16:9
> widescreen, and ideally he'd like to use 16M colours within RISC OS.
> As there's already a RISC OS MDF available for 2560x1600 pixels in 16M
> colours (many thanks to mohsen for that), using the ARM7500 core
> emulation, presumably the 'lesser' requirement is feasible.
> Can anyone help with a RISC OS MDF for 2560x1440 pixels please? TIA.

Just reduce the 1600 to 1440, as VRPC will use the PC mode of the same 
resolution, and ignore the actual timing information.

You will have to change to using the ARM7500 emulation, as the StrongARM 
one emulates the limitation of 2MB of VRAM of the Risc PC. Where as the 
ARM7500 stores the screen buffer in main memory, so as long there is 
enough main memory you can do as big a screen as you like. The 
resolution you are after will take 15MB.

Email: druck at druck.org.uk
Phone: +44-(0)7974 108301

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