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/s2... <https://web.archive.org/web/20150929213440fw_/http://www.arcades.plus.com/s2650_fluke_adapter.htm>
Thanks!
John :-#)#
-- John's Jukes Ltd. 7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 Call (604)872-5757 (Pinballs, Jukes, Video Games) flippers.com "Old pinballers never die, they just flip out"
