DataMuseum.dk

Presents historical artifacts from the history of:

Rational R1000/400 Tapes

This is an automatic "excavation" of a thematic subset of
artifacts from Datamuseum.dk's BitArchive.

See our Wiki for more about Rational R1000/400 Tapes

Excavated with: AutoArchaeologist - Free & Open Source Software.

top - download

Index: ┃ P T ┃

⟦27ea7ea7b⟧ TextFile

    Length: 824 (0x338)
    Types: TextFile
    Names: »PP2IT_S«

Derivation

└─⟦149519bd4⟧ Bits:30000546 8mm tape, Rational 1000, !projects 93-07-13
    └─ ⟦124ff5788⟧ »DATA« 
        └─⟦this⟧ 
└─⟦a7d1ea751⟧ Bits:30000550 8mm tape, Rational 1000, !users!projects 94_04_11
    └─ ⟦129cab021⟧ »DATA« 
        └─⟦this⟧ 
└─⟦f64eaa120⟧ Bits:30000752 8mm tape, Rational 1000, !projects 93 02 16
    └─ ⟦6f12a12be⟧ »DATA« 
        └─⟦this⟧ 
└─⟦2f6cfab89⟧ Bits:30000547 8mm tape, Rational 1000, !projects 94-01-04
    └─ ⟦d65440be7⟧ »DATA« 
        └─⟦this⟧

TextFile

;
;PPI memory mapped to CPU with IT
;        
        OPTIONS	CONVERT

ROM	EQU	2000H
STACK	EQU	4500H
Aim1    EQU     27F7H
It      EQU     2700H

PPI	EQU	3018H
PortA   EQU     PPI
PortB   EQU     PPI+1
PortC   EQU     PPI+2
Ctrl    EQU     PPI+3
Mode    EQU     11111000B     ; A mode 2  - B mode 0 out
Inta    EQU     09H           ; It flag A set

	ORG	ROM
        LD      SP,Stack
        LD      A,27H
        LD      I,A
        IM2
        LD      A,Mode
        LD      (Ctrl),A
        LD      A,inta
        LD      (Ctrl),A
        EI
        LD      C,0
loop:   INC     C
        JP      loop

        ORG     It
        PUSH    AF
        PUSH    BC
        LD      A,(PortA)
        POP     BC
        POP     AF
        EI
        RET
      
        ORG     Aim1
        DEFB    00H
        DEFB    27H 

	END