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1 line
11 KiB
Plaintext
\ System depended IO definitions for 6502 target cas 26jan06 \ loadscreen for py65 cas 15juli2020 1 9 +thru \\ The following IO definitions are for the py65 emulator at https://github.com/mnaberez/py65 A char can can be read by memory mapped IO at $f004 A char can be written to memory mapped IO at $f001 \ 65KEY? GETKEY 25JAN85RE) cas 15july2020 CODE 65KEY? ( -- FLAG) $f004 lda $9ff sta push0a jmp end-code CODE GETKEY ( -- 8B) $9ff lda push0a jmp end-code CODE CURON ( --) NEXT JMP END-CODE CODE CUROFF ( --) NEXT JMP END-CODE : 65KEY ( -- 8B) BEGIN PAUSE 65KEY? UNTIL GETKEY ; \ DECODE EXPECT KEYBOARD BP28MAY85) cas 18juli20207F CONSTANT #BS 0D CONSTANT #CR &27 CONSTANT #ESC 0A CONSTANT #LF : 65DECODE ( ADDR CNT1 KEY -- ADDR CNT2) #BS CASE? IF DUP IF DEL 1- THEN EXIT THEN #CR CASE? IF DUP SPAN ! EXIT THEN >R 2DUP + R@ SWAP C! R> EMIT 1+ ; : 65EXPECT ( ADDR LEN1 -- ) SPAN ! 0 BEGIN DUP SPAN @ U< WHILE KEY DECODE REPEAT 2DROP SPACE ; INPUT: KEYBOARD [ HERE INPUT ! ] 65KEY 65KEY? 65DECODE 65EXPECT [ \ send? (emit 65emit cas 15july2020 \ | Code send? ( -- flg ) \ $01 # lda push0a jmp end-code Code (emit ( 8b -- ) SP X) lda $f001 sta (drop jmp end-code \ EMIT CR DEL PAGE AT AT? 25JAN85RE) cas 15july2020 | Variable out 0 out ! | &80 Constant c/row : 65emit ( 8b -- ) pause 1 out +! (emit ; : 65CR #CR 65emit #LF 65emit out @ c/row / 1+ c/row * out ! ; : 65DEL #bs 65emit SPACE #bs 65emit -2 out +! ; : 65PAGE .( insert code for page ) out off ; : 65at ( row col -- ) .( insert code for at ) swap c/row * + out ! ; : 65AT? ( -- ROW COL ) out @ c/row /mod &24 min swap ; \ 65type cas 15jul2020 : 65type ( adr len -- ) bounds ?DO I c@ emit LOOP ; \ TYPE DISPLAY (BYE BP 28MAY85RE) er14dez88 OUTPUT: DISPLAY [ HERE OUTPUT ! ] 65EMIT 65CR 65TYPE 65DEL 65PAGE 65AT 65AT? [ | : (bye ; \ B/BLK DRIVE >DRIVE DRVINIT 28MAY85RE) cas 26jan06 $400 CONSTANT B/BLK \ Bytes per physical Sector $0AA CONSTANT BLK/DRV \ number of Blocks per Drive | VARIABLE (DRV 0 (DRV ! | : DISK ( -- DEV.NO ) (DRV @ 8 + ; : DRIVE ( DRV# -- ) BLK/DRV * OFFSET ! ; \ cas 18juli2020: >DRIVE ( BLOCK DRV# -- BLOCK' ) BLK/DRV * + OFFSET @ - ; : DRV? ( BLOCK -- DRV# ) OFFSET @ + BLK/DRV / ; : DRVINIT NOOP ; : READBLOCK ( ADR BLK ) $f011 ! $f013 ! 01 $f010 c! ; : WRITEBLOCK ( ADR BLK ) $f011 ! $f013 ! 02 $f010 c! ; \ (r/w cas 18juli2020 : (R/W ( ADR BLK FILE R/WF -- FLAG) swap abort" no file" IF readblock ELSE writeblock THEN false ; ' (R/W IS R/W |