Re: Gemdos + desktop for lisa

From: gilles <gilles504_at_email.domain.hidden>
Date: Mon, 19 Feb 2018 07:44:08 -0800 (PST)


this version may work on 1.5Mb
I added a new command to command.prg to set value of video base register. type MAGIC and the screen should appear.

It will not fix the issue on 512Mb because the base OS is hardcoded to 1Mb in gemdos and I do not have the full sources to compile A proper lisa MMU initialisation is needed but it may be a better and faster option to port emutos to lisa.

There are also debug logs on the init command. here again the problem seems to be in gemdos.

Le dimanche 18 février 2018 20:10:58 UTC+1, compu_85 a écrit :
>
> With a little testing I confirmed 1mb is hardcoded. With 512k it throws a
> (lisa) boot files error right away, with 1.5M there's no graphic display.
>
> On Sun, Feb 18, 2018 at 6:04 AM, gilles <gill..._at_email.domain.hidden <javascript:>>
> wrote:
>
>> I think 1Mb is hardcoded but the gemdos boot does set base video address
>> to $F8000
>> I did not find MMU init in gemdos source code so I think gemdos just rely
>> on the linear address set up by the boot rom.
>>
>>
>> --
>> --
>> -----
>> You received this message because you are a member of the LisaList group.
>> The group FAQ is at http://lowendmac.com/lists/lisa.html
>> To post to this group, send email to lisa..._at_email.domain.hidden
>> <javascript:>
>> To leave this group, send email to lisalist+u..._at_email.domain.hidden
>> <javascript:>
>> For more options, visit this group at
>> http://groups.google.com/group/lisalist
>> ---
>> You received this message because you are subscribed to the Google Groups
>> "LisaList" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to lisalist+u..._at_email.domain.hidden <javascript:>.
>> For more options, visit https://groups.google.com/d/optout.
>>
>
>
>
> --
> Jason Perkins
> 313 355 0085
>

-- 
-- 
-----
You received this message because you are a member of the LisaList group.
The group FAQ is at http://lowendmac.com/lists/lisa.html
To post to this group, send email to lisalist_at_email.domain.hidden
To leave this group, send email to lisalist+unsubscribe_at_email.domain.hidden
For more options, visit this group at http://groups.google.com/group/lisalist
--- 
You received this message because you are subscribed to the Google Groups "LisaList" group.
To unsubscribe from this group and stop receiving emails from it, send an email to lisalist+unsubscribe_at_googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

  • application/octet-stream attachment: gemdos.dc
Received on 2018-02-19 10:46:57

This archive was generated by hypermail 2.4.0 : 2020-01-13 12:15:17 EST