Emulation of non-Commodore bridgeboards (x86)

B14ck W01f · 11 September 2018, 14:23

Thank you for emulating the bridgeboards made by Commodore (A1060, A2086, A2286, A2386), but I would like to see bridgeboards not made by C=. The link posted below has manuals for some of them, mainly Medusa, Emplant, and PC 286. But for those that do not have manuals, there are always the adverts.

http://amiga.resource.cx/dir/bridge

Toni Wilen · 11 September 2018, 18:17

There is no useful technical, low level, hardware documentation, none at all, for non-Commodore bridgeboards. User manuals are totally useless.

Commodore bridgeboard emulation was only possible because Commodore boards' address space, IO registers etc are documented in A500/A2000 Technical Reference Manual.

(Not the first time this has been asked.)

Hewitson · 12 September 2018, 14:56

That's not to say that other boards couldn't be reverse engineered. But it would be a waste of time and effort in my opinion.

Toni Wilen · 12 September 2018, 15:09

Yes and yes.

They have PC-side only address space that is totally invisible to Amiga side and debugging and reverse-engineering would require use of PC and Amiga software at the same time, disassembling both m68k and x86 code and more..

nogginthenog · 12 September 2018, 19:10

Or worse. The ATonce+ 286 board has 512Mb of RAM on board. This is not accessible to the Amiga until something in the software enables it.
If you start the s/w then reboot you can AddMem() it

11 September 2018, 14:23	#1
B14ck W01f m68k all the way Join Date: Aug 2011 Location: Koalaland Posts: 523	Emulation of non-Commodore bridgeboards (x86) Thank you for emulating the bridgeboards made by Commodore (A1060, A2086, A2286, A2386), but I would like to see bridgeboards not made by C=. The link posted below has manuals for some of them, mainly Medusa, Emplant, and PC 286. But for those that do not have manuals, there are always the adverts. http://amiga.resource.cx/dir/bridge

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11 September 2018, 18:17	#2
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,502	There is no useful technical, low level, hardware documentation, none at all, for non-Commodore bridgeboards. User manuals are totally useless. Commodore bridgeboard emulation was only possible because Commodore boards' address space, IO registers etc are documented in A500/A2000 Technical Reference Manual. (Not the first time this has been asked.)

12 September 2018, 14:56	#3
Hewitson Registered User Join Date: Feb 2007 Location: Melbourne, Australia Age: 41 Posts: 3,771	That's not to say that other boards couldn't be reverse engineered. But it would be a waste of time and effort in my opinion.

12 September 2018, 15:09	#4
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,502	Yes and yes. They have PC-side only address space that is totally invisible to Amiga side and debugging and reverse-engineering would require use of PC and Amiga software at the same time, disassembling both m68k and x86 code and more..

12 September 2018, 19:10	#5
nogginthenog Amigan Join Date: Feb 2012 Location: London Posts: 1,309	Or worse. The ATonce+ 286 board has 512Mb of RAM on board. This is not accessible to the Amiga until something in the software enables it. If you start the s/w then reboot you can AddMem() it

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