[Techtoolslist] Anyone else make Mike Coates 2650 - Z80 adapter?

[John Robertson]

INTACK is INTerrupt ACKnowledge and is generated by the 2650. So, how 
does one get that out of a Z80 I wonder...
Reading Osborne's excellent An Introduction To Microcomputers Volume 2, 
Some Real Microprocessors says this on page 7-10:

I'll try that  - I think there is a spare gate or two I can use..

If it works I'll report back!

John :-#)#

On 2024/05/10 11:30 a.m., John Robertson via Techtoolslist wrote:
> I've had this adapter sitting on a shelf since 2004 and just found a 
> use for it when working on a Zaccaria pinball MPU. The problem is it 
> doesn't work and it looks like the 2650 CPU has to drive INTACK, but 
> it ties low in the original article on pages 9 &10 of 
> TroubleshooterV1-1983-combined-searchable.pdf (on ftp list under 
> Fluke/9XXX/Fluke Troubleshooter Magazine).
>
> Anyone else use this adapter or made one that works for Zac. games?
>
> Here is Mike's article:
>
> web.archive.org
>
> S2650 Fluke Adapter <#>
>
> 🔗 
> https://web.archive.org/web/20150929213440fw_/http://www.arcades.plus.com/s2650_fluke_adapter.htm 
> <https://web.archive.org/web/20150929213440fw_/http://www.arcades.plus.com/s2650_fluke_adapter.htm> 
>
>
>  Thanks!
>
> John :-#)#
>

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