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add datetime device

This commit is contained in:
~d6 2025-01-20 21:16:55 -05:00
parent 4022553dc0
commit a59959bcd9
2 changed files with 31 additions and 2 deletions
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6
date-test.tal Normal file
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@ -0,0 +1,6 @@
|100
#c0 DEI #c1 DEI #c2 DEI #c3 DEI #010e DEO POP2 POP2
#c4 DEI #c5 DEI #c6 DEI #c7 DEI #010e DEO POP2 POP2
#c8 DEI #c9 DEI #ca DEI #cb DEI #010e DEO POP2 POP2
#800f DEO BRK

27
vm.scm
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@ -7,7 +7,7 @@
; === implementation-dependent functions; uncomment one stanza
; chicken scheme
(import (chicken bitwise) (chicken process-context))
(import (chicken bitwise) (chicken process-context) (chicken time posix))
(define (get-u8 port)
(let ((c (read-char port))) (if (eof-object? c) c (char->integer c))))
(define (open-rom path) (open-input-file path #:binary))
@ -182,7 +182,28 @@
(_push2 (hilo->u16 hi lo)))
(_push1 (_dei port)))))
(define (_dei port)
(u8 (vector-ref dev port)))
(cond
((= 4 port) (_push1 (+ (car wst) 1)))
((= 5 port) (_push1 (+ (car rst) 1)))
((and (<= 192 port) (< port 208)) (_datetime (- port 192)))
(* (u8 (vector-ref dev port)))))
; (0:seconds 1:minutes 2:hours 3:mday 4:month 5:year 6:wday 7:yday 8:dstflag 9:timezone)
(define (_datetime field)
(u8 (let ((t (seconds->local-time)))
(cond
((= field 0) (u16->hi (+ 1900 (vector-ref t 5)))) ; year hi
((= field 1) (u16->lo (+ 1900 (vector-ref t 5)))) ; year lo
((= field 2) (vector-ref t 4)) ; month
((= field 3) (vector-ref t 3)) ; day of month
((= field 4) (vector-ref t 2)) ; hours
((= field 5) (vector-ref t 1)) ; minutes
((= field 6) (vector-ref t 0)) ; seconds
((= field 7) (vector-ref t 6)) ; day of week
((= field 8) (u16->hi (vector-ref t 7))) ; day of year hi
((= field 9) (u16->lo (vector-ref t 7))) ; day of year lo
((= field 10) (if (vector-ref t 8) 1 0)) ; is dst
(* (vector-ref dev (+ 192 field))))))) ; device memory
; DEO base instruction implementation
(define (deo-impl k)
@ -196,6 +217,8 @@
(define (_deo byte port)
(vector-set! dev port (u8 byte))
(cond
((= 4 port) (set-car! wst byte))
((= 5 port) (set-car! rst byte))
((= 14 port) (debug))
((= 24 port) (write-char (integer->char byte) (current-output-port)))
((= 25 port) (write-char (integer->char byte) (current-error-port)))