Hi! a long time I want to create simple and functional computer (4 bit),
and now I want to present it to you!

This is incomplete version, but I will try to make it complete.

You may create own program code.


How does this work:
"Programmator" is a two pages, one page - 16 lines, one line is a 3 cell.
One line - one command (this rule may be modified)

[farg] - function argument.
[mem] - memory address
[reg] - register name
[null] - empty cell

Usage, Description
Commands:
JMP [page] [line], setup current line.
MEM [mem] [value], move value into memory.
REG [reg] [value], move value into register.
MTR [reg] [mem], copy value from memory into register.
RTM [mem] [reg], copy value from register into memory.
RTR [reg] [reg], copy value from first register to second register.

Function:
-------------------------------
VGA [farg] [reg], Control of "video adapter", works with register [reg].

farg list:
RST - Clear display.
DSN - Display signed number. (incomplete)
DUN - Display unsigned number.
-------------------------------
IF [farg] [null], Simple condition, work with register "A" and "B", If result of condition = TRUE, it jumps +2 line to down.
If result = FALSE, it jumps to next line.

farg list:
A = B.
A > B.
A < B.
A ! B - A not equal B.
-------------------------------
KEY [farg] [reg], Activate "Keyboard" and waiting when buttons will be pressed, result moves into register [reg].

farg list:
ANY - return index from any button
NUM - return index only number button
SYS - return index only system button (unsupported with current keyboard)
-------------------------------
ALU [farg] [reg], Arithmetic and logic unit, operates with A and B registers, result of operation moves into register [reg].

farg list:
NOT - invert bits in "A" register.
OR - logic operation.
XOR.
AND.
ADD - A + B

-------------------------------
COM [farg] [reg], Communication port

farg list:
R - request data
W - send data

-------------------------------

Thank you for your attention.

Updated.
Added: Command "IF".

Updated.
Added: Device "Keyboard", Function "KEY".

@funmaker (View Post)
>it need some math functions.
it in process.

gamax92:

The [0] key on the keyboard seems to be broken.

Thanks!

"Programmator" may support 16 pages, but this free space reserved for other commands.