Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-23 00:39:36 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

(MESS) amust : notes

Browse Source
This commit is contained in:
Robbbert 2014-03-24 10:51:20 +00:00
parent 2af73a8d1a
commit 7a1ecf48c9
1 changed files with 13 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/mess/drivers/amust.c
View File

@ -2,10 +2,7 @@
// copyright-holders:Robbbert
/***************************************************************************
Amust Compak
A magazine called it the Amust Executive 816. Trying to confirm if in fact
it's the same computer.
Amust Compak - also known as Amust Executive 816.
2014-03-21 Skeleton driver. [Robbbert]
@ -15,8 +12,7 @@ The entire driver is guesswork.
The board has LH0080 (Z80A), 2x 8251, 2x 8255, 8253, uPD765A and a HD46505SP-2.
The videoram is a 6116 RAM. There is a piezo beeper. There are 3 crystals,
X1 = 4.9152 (serial chips?), X2 = 16 (CPU), X3 = 14.31818 MHz (Video?).
Floppy capacity: 790k
Their are numerous jumpers, all of which perform unknown functions.
There are numerous jumpers, all of which perform unknown functions.
The keyboard is a plug-in unit, same idea as Kaypro and Zorba. It has these
chips: INS8035N-6, F74145, 74LS373N, SN75451BP, 2716 rom with label KBD-3.
@ -26,6 +22,17 @@ The main rom is identical between the 2 halves, except that the initial
crtc parameters are slightly different. I've chosen to ignore the first
half.
Floppy Parameters:
Double Density
Two Side
80 track
1024 byte sectors
5 sectors/track
800k capacity
128 directory entries
2k block size
Skew 1,3,5,2,4
Monitor Commands:
B = Boot from floppy