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author | AJR <ajrhacker@users.noreply.github.com> | 2016-09-07 22:56:28 -0400 |
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committer | AJR <ajrhacker@users.noreply.github.com> | 2016-09-07 22:56:28 -0400 |
commit | 9009021c8e7de61ecb22cf31af0f3b248c242b03 (patch) | |
tree | 39c710e39a2bd31138edfb28a0c43692e2346891 /src/mame/drivers/amusco.cpp | |
parent | 6dcfe97f718ef864bcaa477ddd05404f9a26431f (diff) |
amusco.cpp: Hardware notes (nw)
Diffstat (limited to 'src/mame/drivers/amusco.cpp')
-rw-r--r-- | src/mame/drivers/amusco.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
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: |