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Old 31 March 2017, 21:14   #1
mark_k
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GVP Series I SCSI dual ROM

Some time ago I posted this thread about a dual-ROM version of gvpscsi.device version 3.15 for GVP Series I SCSI controllers. My "remastered" version works in WinUAE and apparently on real hardware too.

The other day I noticed that Ralph Babel has made his own dual-ROM version available on his web site. Judging from the file datestamps in gvpscsi3dual.tar.bz2, those EPROM images were built back in 1991 (but presumably never publically released until recently).

WinUAE doesn't support selecting two ROM files for Series I controllers, so you need to build a 16KB combined image and tell WinUAE to use that. I padded the short files from gvpscsi3dual.tar.bz2 and created a combined image; see the attached archive. But I can't get the combined image to work in WinUAE.

I have a config which uses GVP Series I and my remastered 3.15 ROM which works fine. But changing the GVP ROM to gvpscsi16_combined.bin doesn't, WinUAE gets into a reboot loop. That happens with and without JIT.

One crucial difference between my version and Ralph's is that his seems to execute in-place, i.e. it directly runs the ROM code at $E9xxxx (or wherever). Whereas my version copies the ROM code to RAM and runs it from there.

Does WinUAE support that, or have I done something wrong?
Attached Files
File Type: zip gvpscsi_315_dual-ROM.zip (20.7 KB, 18 views)
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Old 31 March 2017, 22:07   #2
Toni Wilen
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Works for me.
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Old 01 April 2017, 14:14   #3
mark_k
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Try the attached configs.

You'll need to change the GVP ROM path to wherever the files are on your system. Change the HDF to Crash_test_HD_4GB.bin (which you hopefully still have somewhere).

For me, my_test_JIT_uaegfx_GVPI_remaster_alt.uae boots fine, but my_test_JIT_uaegfx_GVPI_RalphBabelDualROM.uae resets in a loop (also does that without JIT).
Attached Files
File Type: zip GVPI_test.zip (5.7 KB, 12 views)
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Old 01 April 2017, 15:10   #4
Toni Wilen
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Right, I forgot that GVP is not yet "direct io" capable. More compatible is needed.
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Old 01 April 2017, 16:19   #5
Toni Wilen
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Done but only supported if ROM is not banked (guru rom).
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Old 01 April 2017, 20:28   #6
mark_k
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Not a problem since there is no Guru-ROM for GVP Series I (other than on Ralph Babel's hard drive maybe..?), and Series II boards only have one ROM socket.
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