Product specifications

21 insert key
22 delete key
23 back tab
25 tab key
27,65 attr p,state
27,89 crvs n,t,x,y,w,h,s
27,90 vs n
27,67 gr$ x,y,b (result in work space)
Printer Output
All screen output can be redirected to either the RS232 or the centronics interface and
hence the printer. To do this from basic type:
POKE 64143,DEV – Where DEV is 0 for screen
1 for Centronics
2 for RS232
Option 2 sets the list device. To divert screen output to the list device:
POKE 64885,1
This done simply in assembler, eg:
START: LD A,1 ;Select output to printer option
LD (£FD75),A
LD (£FA8F),A
Points to look out for
3.6
In almost every case that you use interrupts of the nature described in section 3.3
BASIC will be knocked out of action. This is the reason why there is no BASIC in this
section because it cannot actually be used in conjunction with the listed code.
It is important to note that if you wish to exist from an interrupt servicing routine
entirely for some time, then you must perform a DI instruction to eliminate any pending
interrupts and then later an EI instruction to re-enable them.
If you wish to set up new interrupt servicing routines then you must perform a
complete set-up as described in section 3.2
Sprites – Introduction
4.1
The best way to lead into this section is to define exactly what sprites are on the MTX.
I am making the assumption that anybody who is reading this section will have seen
sprites in action at some time, perhaps on an arcade game of some sort, or the MTX
or some other computer.