Are there two sizes for kick13.rom?

MickJT · 12 August 2007, 11:38

I have an original dump of my A500 kickstart rom from way back. 256kb. Everywhere I read on the net suggests it should be 256kb, but every pirated one I come across is always 512kb. It doesn't appear to filled with null data either, so what's the difference? TUDE I remember only worked with the original 256kb one.

Also, WinUAE accepts the 512kb fine.

OddbOd · 12 August 2007, 15:18

The only 1.3 ROMs I have seen that are 512kb have been extracted from A3000s and contain two 256k Kickstarts one after another, why they are like this I really don't know though I have no doubt someone round here will.

Jope · 14 August 2007, 07:38

No, all 1.3 machines will produce a 512kB image if you use transrom. The 256kB kickstart is visible twice in the address space.

If you really need a 256kB image and have a 512kB image, just split it in two.

gulliver · 15 August 2007, 00:49

Totally true what Jope said. In fact, they are commonly called overdumped roms and they add an "o" after their names.
But remeber it is a software issue that makes them twice their size. Real 1.3 ROMS are 256kb!

12 August 2007, 11:38	#1
MickJT Registered User Join Date: Jul 2007 Location: Australia Posts: 189	Are there two sizes for kick13.rom? I have an original dump of my A500 kickstart rom from way back. 256kb. Everywhere I read on the net suggests it should be 256kb, but every pirated one I come across is always 512kb. It doesn't appear to filled with null data either, so what's the difference? TUDE I remember only worked with the original 256kb one. Also, WinUAE accepts the 512kb fine.

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12 August 2007, 15:18	#2
OddbOd Registered User Join Date: Jul 2005 Location: Australia Age: 46 Posts: 666	The only 1.3 ROMs I have seen that are 512kb have been extracted from A3000s and contain two 256k Kickstarts one after another, why they are like this I really don't know though I have no doubt someone round here will.

14 August 2007, 07:38	#3
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,862	No, all 1.3 machines will produce a 512kB image if you use transrom. The 256kB kickstart is visible twice in the address space. If you really need a 256kB image and have a 512kB image, just split it in two.

15 August 2007, 00:49	#4
gulliver BoingBagged Join Date: Aug 2007 Location: The South of nowhere Age: 46 Posts: 2,358	Totally true what Jope said. In fact, they are commonly called overdumped roms and they add an "o" after their names. But remeber it is a software issue that makes them twice their size. Real 1.3 ROMS are 256kb!

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