Here is a first "all-in-one" demo - SD card interface, graphics, text, speech!

Here is the program:

00 F08 # clear registers 
01 F20 # display registers 0 and 1 on the LED display 
02 50A # enable draw line (x1, y1) - (x2, y2) mode; display (0,0) - (x7F,x1F) 
03 000 # send x1 low nibble: 0 
04 3F0 # send x1 high nibble: value in register 0 
05 000 # send y1 low nibble: 0 
06 000 # send y1 high nibble: 0 
07 000 # send x2 low nibble: 0
08 3F1 # send x2 high nibble: value in register 1 
09 0FF # send y2 low nibble: F  
0A 011 # send y2 high nibble: 1 -> x1F (32 4*8 = 32) 
0B 520 # add to to register 0 
0C 980 # reg 0 = 8? 
0D E0F # yes, then goto x0F 
0E C02 # no, goto x02 
0F 100 # reg 0 = 8: clear register 0 (to 0) 
10 521 # add 2 to register 1 
11 981 # reg 1 = 8? 
12 E14 # yes, then goto x14
13 C02 # no, goto x02 
14 50E # register 2 = 8, end of nested reg 0, 1 loop. enable speak echo mode.  
15 506 # enable print ASCII char to display with speech echo 
16 0DD # send ASCII codes for MICROTRONIC (x4D, x49, x43, ...); M 
17 044 
18 099 # I 
19 044
1A 033 # C 
1B 044
1C 022 # R 
1D 055
1E 0FF # O 
1F 044
20 044 # T
21 055
22 022 # R 
23 055
24 0FF # O 
25 044
26 0EE # N
27 044
28 099 # I
29 044
2A 033 # C 
2B 044
2C 0AA # LF (0x0A) -> speech synth will speak MICROTRONIC 
2D 000
2E F00 # end of program, halt