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This would be useful, for example, to allow the assembler to write straight to an AT28 EEPROM without going to RAM. This would be a life saver in machines with tight RAM such as the SMS.
17 lines
543 B
Plaintext
17 lines
543 B
Plaintext
( xcomp core high )
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: (main) INTERPRET BYE ;
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: BOOT
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0x02 RAM+ CURRENT* !
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CURRENT @ 0x2e RAM+ ! ( 2e == BOOT C< PTR )
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0 0x08 RAM+ ! ( 08 == C<* override )
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['] (emit) ['] EMIT **! ['] (key) ['] KEY **!
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['] CRLF ['] NL **!
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['] (boot<) ['] C<* **!
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['] C@ ['] A@ **! ['] C! ['] A! **! ['] C, ['] A, **!
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( boot< always has a char waiting. 06 == C<?* )
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1 0x06 RAM+ ! INTERPRET
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RDLN$ LIT" _sys" [entry]
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LIT" Collapse OS" (print) NL (main) ;
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XCURRENT @ _xapply ORG @ 0x04 ( stable ABI BOOT ) + !
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1 4 LOADR+
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