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Reorganized folders, added pal-adapter io device folder

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Daniele Verducci su MatissePenguin
2021-01-02 16:33:51 +01:00
parent 55f5d62082
commit 68752e85a7
35 changed files with 327 additions and 1 deletions
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pat80-computer/software/z80-assembly/applications/README.md Normal file
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# Pat80 Applications
## Intro
This folder contains some example applications.
The folder `brief` contains little applications that can be entered directly via keyboard in the memory monitor.
The folder `big` contains complete applications to be loaded via sdcard or tape.
## How to write an application
When the Pat80 operating system is built, a `abi-generated.asm` file is built along with the rom binary. This file contains the description of the OS available API.
An application targeting the last version of the OS should include this file, to make the system calls labels available inside the application code.
The application can obtain the operating system ABI version (ABI -> https://en.wikipedia.org/wiki/Application_binary_interface) via the Sys_ABI call (it is a 16 bits integer returned in BC).
The application's first command should be an ABI check: if the OS version is not compatible with the app, the app should exit displaying an error message.

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pat80-computer/software/z80-assembly/applications/brief/hello_world.asm Normal file
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org 0xA000
include '../../os/abi-generated.asm'
STRING: DB "Hello",0
ld bc, STRING
call Sys_Print
jp 0

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pat80-computer/software/z80-assembly/applications/tests/hd44780_lcd_test_procedure.asm Normal file
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;hd44780 lcd test procedure
LCD_INSTR_REG: EQU %00000000
LCD_DATA_REG: EQU %00000001
;reset procedure
ld a,%00111000
out (LCD_INSTR_REG),a
ld a,%00001000
out (LCD_INSTR_REG),a
ld a,%00000001
out (LCD_INSTR_REG),a
;init procedure
ld a,%00111000
out (LCD_INSTR_REG),a
ld a,%00001110
out (LCD_INSTR_REG),a
;write characters to display
ld a,%01000100
out (LCD_DATA_REG),a
ld a,%01100001
out (LCD_DATA_REG),a
ld a,%01101110
out (LCD_DATA_REG),a
ld a,%01101001
out (LCD_DATA_REG),a
ld a,%01100101
out (LCD_DATA_REG),a
ld a,%01101100
out (LCD_DATA_REG),a
ld a,%01100101
out (LCD_DATA_REG),a
ld a,%00100001
out (LCD_DATA_REG),a
halt