[Techtoolslist] Using the 9010 to fill a block of RAM

[Adam Courchesne]

Here you go.  I use this script all thew time when debugging video memory
issues. Flood the video mem with a known value and then look at the outputs
when the video circuitry performs reads to see if something in the datapath
or RAM is sketchy.

On Wed, Jan 28, 2015 at 8:30 PM, John Robertson <jrr at flippers.com> wrote:

> Hi Adam,
>
> You can post it to the list if you wish, others may be interested...
>
> Thanks!
>
> John :-#)#
>
> On 01/28/2015 5:19 PM, Adam Courchesne wrote:
>
>>
>> I have this. I'll send it to you when I get home.
>>
>> On Jan 28, 2015 8:07 PM, "John Robertson" <jrr at flippers.com <mailto:
>> jrr at flippers.com>> wrote:
>>
>>     I'm hoping one of you code jockeys knows a simple program for
>>     filling a block of memory on the 9010 - in this case with FFs.
>>
>>     I'm looking for something like:
>>
>>     *Begin at address xxxxh write FFh, **
>>     **
>>     **Increment counter by 1 store, **
>>     **
>>     **Compare counter with yyyyh - if equal goto Finish**
>>     **
>>     **Loop back to Begin**
>>     **
>>     **Finish*
>>
>>     I think I just about wrote the program, but it would take me up to
>>     a couple of hours to get it to work (I'm a heck of a lot better on
>>     hardware).
>>
>>     Why do I want this? Well, I am finding that the AnyPin device we
>>     sell is loaded with 00s, and the early Williams games don't seem
>>     to like that, so I want to load them with FFs and see if that
>>     works better. A 5101 is only 4 bits wide, so I made a simple
>>     adapter that puts a second 5101 in parallel (address and selects)
>>     with the original and the four additional data lines (D4 - D7) go
>>     to a Glomper clip that fits over a handy ROM to get those
>>     connections. Now I can test the 5101 in the game using the
>>     standard built in RAM tests.
>>
>>     Thanks!
>>
>>     John :-#)#
>>
>>     --     How to subscribe or unsubscribe from TTL
>>     http://seven.pairlist.net/mailman/listinfo/techtoolslist
>>     _______________________________________________
>>     Techtoolslist mailing list
>>     Techtoolslist at flippers.com <mailto:Techtoolslist at flippers.com>
>>     https://pairlist7.pair.net/mailman/listinfo/techtoolslist
>>     FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment
>>     Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
>>
>>
>
> --
> How to subscribe or unsubscribe from TTL http://seven.pairlist.net/
> mailman/listinfo/techtoolslist
> _______________________________________________
> Techtoolslist mailing list
> Techtoolslist at flippers.com
> https://pairlist7.pair.net/mailman/listinfo/techtoolslist
> FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment
> Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
>



-- 
-Adam
"Please don't judge my God by my inability to follow him"  - Chris Mollins
===============
www.onecircuit.com
www.mapleridge.net
===============
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Block_Write.9lc
Type: application/octet-stream
Size: 751 bytes
Desc: not available
URL: <https://pairlist7.pair.net/pipermail/techtoolslist/attachments/20150129/1cf8e282/attachment.obj>