M.A.I. S10 Basic Four
Model 4105, S/N CE 500353
European 220/240 VAC-Version
Owner Peter Wendt tells us all
It features 2x Z80-CPU
(MK-3880N) @ 2 MHz, 2x 64 KB RAM, 4x Z80-CTC (MK-3884N),
8251A, MB8877, a sort of multitasking OS, a large
12"-b/w monitor (about 270 mm diagonal measured),
capable to display 80/132 characters in 25 lines +
attribs + a status line, 2 Full Height 5.25" Disks
(SS/DD) style like 1st gen. IBM-PC but no visible LED, 2
serial comms (1 AUX, 1 COMM named) in a housing similar
to Kaypro with a Terminal-type keyboard, which can we
flipped up to cover the unit front or taken off the unit
for more flexibility.
I got this one as a present from
a team-mate, who had no use of it anymore - because the
machine is neither IBM-compatible nor a CP/M machine.
It runs on something they call
'Business Basic 4' and this is sort of a multi-tasking
operating system with 'tasks' and 'ghost-tasks' and I
must confess that I haven't actually looked through how
it works. It's a real BASIC and you will have to set
parameters for the tasks as well.
The machine has two full-height
5.25" disk drives - similar to those used on the IBM
PC and they seem to be from Tandon, but have no
The red book to the right of the
machine is the 'Users Reference Manual' - a fine composed
set of pages all written in Courier-10 typewriter font.
The manual also contains a set of disks, one labeled
The system comes up at power on
with no system check, no boring memory count. Just a
'beep', some weird patterns on the screen, then the IPL
from disk 0 (upper) begins. The unit 'knows' different
operating modes: 'BB/4' - running on Basic programms,
'Line' - in Terminal-emulation mode, 'Local' - which
appears to be non-functional and 'AUX' which is another
Terminal mode again.
(taken with a 1973 russian made mirror reflecting type
with a broken photometer)