| 1 |
40 |
rrred |
Z80 Computer on Spartan 3E Starter Kit
|
| 2 |
|
|
|
| 3 |
|
|
Arquitecture
|
| 4 |
|
|
------------
|
| 5 |
|
|
|
| 6 |
|
|
ROT_CENTER push button (Knob) - Reserved - Reset
|
| 7 |
|
|
|
| 8 |
|
|
Memory
|
| 9 |
|
|
------
|
| 10 |
|
|
0000H - 3FFFH - ROM (0 - 16383)
|
| 11 |
|
|
4000H - 5FFFH - VIDEO RAM (16384 - 24575)
|
| 12 |
|
|
7FE0H - 7FFFH - LCD Video RAM (32736 - 32767)
|
| 13 |
|
|
8000H - BFFFH - RAM memory (32768 - 49151)
|
| 14 |
|
|
|
| 15 |
|
|
Registers
|
| 16 |
|
|
---------
|
| 17 |
|
|
7FDDH - Z80SOC VERSION (0 = DE1, 1 = S3E)
|
| 18 |
|
|
7FDEH - 7FDFH - STACK ADDRESS (should be loaded with "ld sp,(7FDEh)" in the beginning of program
|
| 19 |
|
|
|
| 20 |
|
|
IO (Ports)
|
| 21 |
|
|
----------
|
| 22 |
|
|
|
| 23 |
|
|
01H - Out - Green Leds (7-0)
|
| 24 |
|
|
20H - In - SW(3-0)
|
| 25 |
|
|
30H - In - KEY(3-0)
|
| 26 |
|
|
70H - In - Rotary control direction
|
| 27 |
|
|
80H - In - PS/2 Keyboard
|
| 28 |
|
|
90H - Out - Video
|
| 29 |
|
|
91H - Out - Video cursor X
|
| 30 |
|
|
92H - Out - Video cursor Y
|
| 31 |
|
|
|
| 32 |
|
|
--
|
| 33 |
|
|
|
| 34 |
|
|
Reference Sample ROM
|
| 35 |
|
|
|
| 36 |
|
|
It is provided a ROM with a reference application, and the corresponding
|
| 37 |
|
|
Z80 source codes.
|
| 38 |
|
|
|
| 39 |
|
|
To use the application you will need to connect the S3E board to a
|
| 40 |
|
|
VGA monitor and PS/2 keyboard.
|
| 41 |
|
|
|
| 42 |
|
|
The program will show how to use:
|
| 43 |
|
|
Input push buttons
|
| 44 |
|
|
Input Switches
|
| 45 |
|
|
PS/2 keyboard
|
| 46 |
|
|
Video text out (memory mapped and port mapped)
|
| 47 |
|
|
Leds
|
| 48 |
|
|
LCD
|
| 49 |
|
|
Rotary Knob
|
| 50 |
|
|
|
| 51 |
|
|
The program starts waiting for keys to be typed in the keyboard.
|
| 52 |
|
|
The characters are shown on the 40x30 video (VGA).
|
| 53 |
|
|
If "A" is pressed, then the program starts another routine,
|
| 54 |
|
|
that will write bytes into RAM. After 255 bytes are written,
|
| 55 |
|
|
the bytes are read sequencially and the byte read displayed in the leds (binary format).
|
| 56 |
|
|
When finished, waits for KEY0 (East on S3E board) and then restart again.
|
| 57 |
|
|
|
| 58 |
|
|
The switches (4-0) are used as input to calculate delays. Try
|
| 59 |
|
|
changing these switches to speed up ou slow down the leds and the LCD text rotation speed.
|
| 60 |
|
|
When you change these switches, it will only take effect after a Z80 reset (press the Knob button).
|
| 61 |
|
|
|
| 62 |
|
|
The Rotary knob can be used at any time to rotate the text in the LCD to the left or to the right.
|
| 63 |
|
|
|
| 64 |
|
|
The looping text inside the box demonstrates how to access the video ram.
|
| 65 |
|
|
To change speed of scrolling, use the switches (SW).
|
| 66 |
|
|
|
| 67 |
|
|
To reset the Z80, press the Knob Button (rotary).
|
| 68 |
|
|
|
| 69 |
|
|
Hope you enjoy.
|
| 70 |
|
|
|
| 71 |
|
|
TO-DO:
|
| 72 |
|
|
----
|
| 73 |
|
|
|
| 74 |
|
|
- 80x40 Video display
|
| 75 |
|
|
- Serial communication
|
| 76 |
|
|
- Monitor program to allow download of programs by serial communication
|
| 77 |
|
|
- Mass storage device (SD/MMC)
|
| 78 |
|
|
- Video colors
|
