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Reischl

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This commit is contained in:
Andreas Mieke 2018-04-03 21:45:17 +02:00
parent 003f6dc2f3
commit 496209fb46
36 changed files with 1272 additions and 351 deletions
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Reischl/lst/CTC_Counter.lst Normal file
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1 ;******************************************************************************
2 ;* Z80 Assembler program *
3 ;* Josef Reisinger *
4 ;* josef.reisinger@htl-hl.ac.at *
5 ;* 26/04/2015 *
6 ;******************************************************************************
7
8 ; ---------------------------- PIO 82C55 I/O ---------------------------------
9 0080 PIO_A: EQU $80 ; (INPUT)
10 0081 PIO_B: EQU $81 ; (OUTPUT) OUT TO LEDS
11 0082 PIO_C: EQU $82 ; (INPUT) IN from DIP SWITCHES
12 0083 PIO_CON: EQU $83 ; CONTROL BYTE PIO 82C55
13
14 ; --------------------------- CTC Z80 Timer Counter --------------------------
15 0000 CTC0 EQU $00 ; Channel 0
16 0001 CTC1 EQU $01 ; Channel 1
17 0002 CTC2 EQU $02 ; Channel 2
18 0003 CTC3 EQU $03 ; Channel 3
19
20 ; -------------------------- SIO (USART) ----------------------------------------
21 0040 SIO_A_D: EQU $40 ; Channel A Data Register
22 0041 SIO_B_D: EQU $41 ; Channel B Data Register
23 0042 SIO_A_C: EQU $42 ; Channel A Control Register
24 0043 SIO_B_C: EQU $43 ; Channel B Control Register
25
26
27 ;-------------------------- CONSTANTS ----------------------------------------
28 FFFF RAMTOP: EQU $FFFF ; 32Kb RAM 8000H-FFFFH
29
30 ;******************************************************************************
31 ;* START AFTER RESET, *
32 ;* Function....: ready system and restart *
33 ;******************************************************************************
34 0000 ORG $0000
35 0000 F3 DI ; Disable interrupt
36 0001 31 FF FF LD SP,RAMTOP ; Set stack pointer to top off ram
37 0004 3E 15 LD A,$15 ; Configure CTC Channel 0:No Interrupt, Timer Mode, No Prescaler,
38 0006 D3 00 OUT (CTC0),A ; trigger on positive edge, next word = time constant, Channel continuous result operation
39 0008 3E BA LD A,186 ; Write Time constant 186*560ns= 104µs
40 000A D3 00 OUT (CTC0),A
41 000C DB 00 AGAIN: IN A,(CTC0) ; Read actual status of CTC Channel 0
42 000E C3 0C 00 JP AGAIN ; Endlos
43
Symbol table:
AGAIN 000C CTC0 0000 CTC1 0001 CTC2 0002
CTC3 0003 PIO_A 0080 PIO_B 0081 PIO_C 0082
PIO_CON 0083 RAMTOP FFFF SIO_A_C 0042 SIO_A_D 0040
SIO_B_C 0043 SIO_B_D 0041
14 symbols.