[Coco] floppy disk controller question for those that still use them

[Bob Devries]

Hi Gene, you said:

> One oddity I tried to check out with
> a couple of lines of code in my newest joydrv_6551L.sb which tries to read
> and display in the boot trace, the state of the slot selector in the MPI,
> which I'd think would be a $33 after a reset.  But its finding a $1D!

Hmm, is the slot selector register readable? The multipak manual says 
nothing about PEEKing the slot register, only POKEing it.

Regards, Bob Devries

--
Besides a mathematical inclination, an exceptionally good mastery of one's 
native tongue is the most vital asset of a competent programmer.

Edsger W.Dijkstra, 18 June 1975

----- Original Message ----- 
From: "Gene Heskett" <gene.heskett at verizon.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Thursday, January 28, 2010 9:21 AM
Subject: Re: [Coco] floppy disk controller question for those that still use 
them


> On Wednesday 27 January 2010, Bob Devries wrote:
>>Hi, Gene,
>>
>>don't shoot me for saying this, but.....
>>
>>I'd assume that you are using the stock rb1773 driver on that disk, and 
>>not
>>the no-halt one?
>
> I tried both.  Same failure.
>
>>Have you noticed any problems reading disks in Disk BASIC (yeah, yeah, I
>>know.... I should wash my mouth).
>
> Yeah.  But after I'd taken everything apart and put it back together a few
> times, its all working again, I think.  One oddity I tried to check out 
> with
> a couple of lines of code in my newest joydrv_6551L.sb which tries to read
> and display in the boot trace, the state of the slot selector in the MPI,
> which I'd think would be a $33 after a reset.  But its finding a $1D!
>
> But yeah, you mentioned DIsk Basic, so go warsh yur mouth out with some of
> grandma's Lye soap. ;-)  Once I'd found OS9 all those years ago, at 
> version
> 1.00.00 at the time, I never looked back.  In the ensuing 20+ years, I've
> only used it as a hardware troubleshooting tool, and rarely at that.
>
>>Regards, Bob Devries
>>
>>--
>>Besides a mathematical inclination, an exceptionally good mastery of one's
>>native tongue is the most vital asset of a competent programmer.
>>
>>Edsger W.Dijkstra, 18 June 1975
>>
>>----- Original Message -----
>>From: "Gene Heskett" <gene.heskett at verizon.net>
>>To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
>>Sent: Thursday, January 28, 2010 6:16 AM
>>Subject: [Coco] floppy disk controller question for those that still use
>>them
>>
>>> Greetings all;
>>>
>>> I have developed an odd problem and in my attempts to trouble-shoot it, 
>>> I
>>> have found that one of my floppy controllers, a shack 3029, actually has
>>> a Fujitsu MB8877A fdc chip in it.
>>>
>>> I can boot my nitros9 system from any controller in slot 3 that actually
>>> has
>>> the DOS command in its eprom.
>>>
>>> If I boot from an SC-II and go thru what it takes to restore floppy
>>> access, a
>>> dir /d0 works just fine.
>>>
>>> But if I boot that exact disk using the shack 3029 controller, the disk
>>> is "wrong type".
>>>
>>> Is this a known incompatibility between the WD1773 in the SC-II and the
>>> MB8877A in the 26-3029?
>>>
>>>
>>> Think honk if you're a telepath.
>>>
>>> --
>>> Coco mailing list
>>> Coco at maltedmedia.com
>>> http://five.pairlist.net/mailman/listinfo/coco
>>
>>--
>>Coco mailing list
>>Coco at maltedmedia.com
>>http://five.pairlist.net/mailman/listinfo/coco
>>
>
>
> -- 
> Cheers, Gene
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
>
> To get back on your feet, miss two car payments.
>
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> http://five.pairlist.net/mailman/listinfo/coco