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https://opencores.org/ocsvn/z80soc/z80soc/trunk
Subversion Repositories z80soc
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/z80soc/tags/z80soc05b/doc
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/RevisionHistory.txt
0,0 → 1,11
2008/04/19 - Added complete character set support |
- Modified the Z80 demo program format the screen output and input |
|
2008/04/16 - Release of Z80SoC-0.5-DE1-Beta |
- Features: |
- IO pins access by ports (7segdisplay, leds, switches, push buttons, gpio) |
- 8 KB VRAM memory mapped |
- 8 KB ROM |
- 4 8KB SRAM |
- Video 40 x 30 Uppercase and Numbers noly |
- PS/2 keyboard input |
/DISCALIMER.TXT
0,0 → 1,14
This is a beginner project. |
|
All precautions (I know) was taken to provide a safe core. |
I have tested and worked with this core on my DE1 board for months, and have |
not caused any damaged to my equipment so far. |
|
However, I decline any responsability of any kind for any damage you may cause to |
you hardware when using this core. |
|
If you find any unsafe code, or badly wrintten code, feel free to make the corrections. |
In the case it is a important change, be kind and let me know: |
ronivon.costa@gmail.com |
|
|
/README.txt
0,0 → 1,111
Z80 Computer on DE1 Development board |
|
Arquitecture |
------------ |
|
|
SW9 - Reserved - Reset |
SW8 - Reserved |
LEDR9 - Reserved |
LEDR8 - Reserved |
|
Memory |
------ |
0000H - 01FFH - ROM (0 - 8191) |
2000H - 3FFFH - VIDEO RAM (8192 - 16383) |
4000H - FFFFH - RAM (16384 - 65535) |
|
IO |
-- |
|
Output Ports |
------------ |
01H - Green Leds (7-0) |
02H - Red Leds (7-0) |
|
10H - HEX1 - HEX0 |
11H - HEX3 - HEX2 |
|
|
|
Inputs |
------ |
20H - SW(7-0) |
|
30H - KEY(3-0) |
|
Video |
----- |
2000h - 1FFFH Video RAM Memory |
2000h - 24B0H Text Video memory |
|
Keyboard |
-------- |
80H - Read Keyboard Ascii code |
|
Input/Output |
------------ |
|
All write operations to GPIO are buffered. |
To write the buffered signals to the pins, the Z80 must |
write any value to port C0 (GPIO0) or C1 (GPIO1) |
|
A0 - GPIO0 (7-0) |
A1 - GPIO0 (15-8) |
A2 - GPIO0 (23-16) |
A3 - GPIO0 (31-24) |
A4 - GPIO0 (35-32) |
|
B0 - GPIO1 (7-0) |
B1 - GPIO1 (15-8) |
B2 - GPIO1 (23-16) |
B3 - GPIO1 (31-24) |
B4 - GPIO1 (35-32) |
|
C0 - GPIO0 Write |
C1 - GPIO1 Write |
|
|
-- |
|
Reference Sample ROM |
|
It is provided a ROM with a reference application, and the correspnding |
Z80 source codes. |
|
To use the application you will need to connect the DE1 board to a |
VGA monitor and PS/2 keyboard. |
|
The program will show how to use: |
Input push buttons |
Input Switches |
PS/2 keyboard |
Video text out |
Leds |
7seg display |
|
The program starts waiting for keys to be typed in the keyboard. |
The characters are shown on the 40x30 video (VGA). |
If "A" is pressed, then the program starts another routine, |
that will write bytes into SRAM. After 255 bytes are written, |
the bytes are read sequencially. |
The address read are displayed in the seven seg display, and |
the byte read displayed in the leds (binary format). |
When finished, waits for KEY0 (DE1 board) and then restart again. |
|
The switches (7-0) are used as input to calculate delays. Try |
changing these switches to speed up ou slow down the leds. It only |
takes effect after a Z80 reset. |
To reset the Z80, use SW9. |
|
Hope you enjoy. |
|
TO-DO: |
---- |
|
- Expand the character sets (this versions have only uppercase letters and numbers) |
- 80x40 Video display |
- Serial communication |
- Monitor program to allow download of programs by serial communication |
- Mass storage device (SD/MMC) |
- Video colors |