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Adding Reischl

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Andreas Mieke 2018-03-18 03:02:44 +01:00
parent e30b39b37a
commit 76010f8d07
97 changed files with 1375 additions and 43 deletions
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Reischl/lst/PIO_RAM_COUNTER.s Normal file
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;******************************************************************************
;* Z80 Assembler program *
;* Josef Reisinger *
;* josef.reisinger@htl-hl.ac.at *
;* 10/07/2017 *
;******************************************************************************
; ---------------------------- PIO 82C55 I/O ---------------------------------
PIO_A: EQU $80 ; (INPUT)
PIO_B: EQU $81 ; (OUTPUT) OUT TO LEDS
PIO_C: EQU $82 ; (INPUT) IN from DIP SWITCHES
PIO_CON: EQU $83 ; CONTROL BYTE PIO 82C55
; --------------------------- CTC Z80 Timer Counter --------------------------
CTC0 EQU $00 ; Channel 0
CTC1 EQU $01 ; Channel 1
CTC2 EQU $02 ; Channel 2
CTC3 EQU $03 ; Channel 3
; -------------------------- SIO (USART) ----------------------------------------
SIO_A_D: EQU $40 ; Channel A Data Register
SIO_B_D: EQU $41 ; Channel B Data Register
SIO_A_C: EQU $42 ; Channel A Control Register
SIO_B_C: EQU $43 ; Channel B Control Register
;-------------------------- CONSTANTS ----------------------------------------
RAMTOP: EQU $FFFF ; 32Kb RAM 8000H-FFFFH
COUNTER: EQU $8000 ; RAM Counter
;******************************************************************************
;* RESET HANDLER *
;* Function: Initialize system and start Main Program *
;******************************************************************************
ORG $0000
DI ; Disable interrupt
LD SP,RAMTOP ; Set stack pointer
JP MAIN ; jump to Main program
;*******************************************************************
;* MAIN PROGRAM *
;*******************************************************************
ORG $100
MAIN: LD A,$99 ; Initialize 8255: PA0-PA7=IN (DIP SWITCHES), PB0-PB7=OUT (LEDS),
OUT (PIO_CON),A ; PC0-PC7=IN, Mode 0 Selection
LD A,$01 ; Initialize RAM Counter
LD HL,COUNTER ; Load RAM Counter Address
LD (HL),A ; Store Counter in RAM cell
AGAIN: LD A,(HL) ; Load RAM Counter
OUT (PIO_B),A ; Output RAM Counter to LEDs (PB0-PB7)
INC (HL) ; Increment RAM Counter
CALL _WAIT ; UP Warteschleife aufrufen
JP AGAIN ; Endlos
;*******************************************************************
;* Warteschleife 0,5s *
;*******************************************************************
_WAIT: LD D,$FF ;
_OUTER: LD E,$FF ;
_INNER: DEC E
JP NZ,_INNER
DEC D
JP NZ,_OUTER
RET