Re: Digest for lisalist_at_email.domain.hidden - 1 Message in 1 Topic

I think you can boot with a trick. something like breaking normal booting procedure and forcing profile boot. if you boot with default device some register is 0 and xenix boot code fails. If you force a real boot device register has another value.
It's a bug between boot eprom and xenix boot code.

I have more information about this bug on my other laptop where I partly coded Idle... problem is I'm 9500km from home :)

2012/9/2 <lisalist_at_email.domain.hidden>

> Today's Topic Summary
>
> Group: http://groups.google.com/group/lisalist/topics
>
> - booting Lisa Xenix <#139840a22c887332_group_thread_0> [1 Update]
>
> booting Lisa Xenix<http://groups.google.com/group/lisalist/t/b3771c986e396fc5>
>
> PSchaefer <dr.p.schaefer_at_email.domain.hidden> Sep 01 01:41PM -0700
>
> Dear all,
>
> did anybody manage to boot Xenix directly from hard disk, like
> UniPlus? The
> installer creates a boot block and puts a 15kB "boot" file into the
> root
> directory, but when I try to boot from HD Lisa throws a "75" error
> (bad
> system file). It never tries to access any other block than 0000, so
> something seems to be wrong with that boot code.
>
> The (ProFile 10M) boot block looks like that:
>
> 0000: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA ****************
> 0010: AAAAAAAA23D70000015823C80000015C ****#W...X#H...\
> 0020: 46FC27002E7C000220004DFA01487402 F|'..|.. .Mz.Ht.
> 0030: 61624281617C761F244E284A341C670E abB.a|v.$N(J4.g.
> 0040: 47FA0110780DB90B56CCFFFC670CD5FC Gz..x.9.VL |g.U|
> 0050: 0000001051CBFFE460DA613842816152 ....QK d`Za8B.aR
> 0060: 43F90002200041EE00202A2E0004DAAE Cy.. .An. *...Z.
> 0070: 0008E085E2855285203C000001E06176 ..`.b.R. <...`av
> 0080: 6130204E203C0000020051CDFFF24EF9 a0 N <....QM rNy
> 0090: 0002200053823C02E6465446615E0242 .. .S.<.fFTFa^.B
> 00A0: 0007ED42204ED0C243FA02DE70406146 ..mB NPBCz.^p_at_aF
> 00B0: 4E752601E083E2830C43000A6D1645FA Nu&.`.b..C..m.Ez
> 00C0: 02F2612661360443000AE5433C363002 .ra&a6.C..eC<60.
> 00D0: 612A600E45FA02BED5C3D683D5C3610A a*`.Ez.>UCV.UCa.
> 00E0: 611A0681000002004E75528A1C1AE146 a.......NuR...aF
> 00F0: DC1A4E7512D851C8FFFC4E7548E7FFFF \.Nu.XQH |NuHg
> 0100: 2206243C00002710263C00000002283C ".$<..'.&<....(<
> 0110: 0000000A244E224ED3FC000002000C39 ....$N"NS|.....9
> 0120: 0002000001B36600000C4EB900FE0090 .....3f...N9.~..
> 0130: 6000001020790000015C267900000158 `... y...\&y...X
> 0140: 4E93650000084CDFFFFF4E754EF90000 N.e...L_ NuNy..
> 0150: 0138626F6F7400000000000000000000 .8boot..........
> 0160: 5265616420626C6F636B0A0000000000 Read block......
> 0170: 00000000000000000000000000000000 ................
>
> What qualifies a working boot block? The "AAAA" signature is present.
> Does
> the boot code start at offset 0x14 (after the tag bytes)?
>
> Booting from floppy each time to get the ":" prompt is somewhat
> annoying.
>
>
> Best regards
> Patrick
>
>
>
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