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 <#>

đź”— 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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