From 9009021c8e7de61ecb22cf31af0f3b248c242b03 Mon Sep 17 00:00:00 2001 From: AJR Date: Wed, 7 Sep 2016 22:56:28 -0400 Subject: [PATCH] amusco.cpp: Hardware notes (nw) --- src/mame/drivers/amusco.cpp | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/src/mame/drivers/amusco.cpp b/src/mame/drivers/amusco.cpp index 17c9ba4ee27..e7d8ef6ffe0 100644 --- a/src/mame/drivers/amusco.cpp +++ b/src/mame/drivers/amusco.cpp @@ -41,6 +41,15 @@ 22.1184 MHz. Crystal 15.000 MHz. Crystal + An unidentified but similar Amusco PCB auctioned on eBay had an AMD P8088 filling the + CPU socket. Some of the other chips on this board were replaced with clones (e.g. + AMD P8253, SY6545-1). + + The program code reads from and writes to what must be a line printer and a RTC + (probably a MSM5832), though neither is present on the main board. The I/O write + patterns also suggest that each or both of these devices are accessed through an + unknown interface chip or gate array (not i8255-compatible). + ***************************************************************************************** DRIVER UPDATES: