16 lines
535 B
Plaintext
16 lines
535 B
Plaintext
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( INT handler. Set RST 38 jump ) PC ORG @ 0x39 + !
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AF PUSH, BEGIN,
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SIO_ACTL INAi, ( RR0 ) 0x01 ANDi, ( is recv buf full? )
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IFZ, ( nope, exit ) A 0x20 ( CMD 4 ) LDri, SIO_ACTL OUTiA,
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AF POP, EI, RETI, THEN,
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HL PUSH,
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HL SIOW> LDdi, A (HL) LDrr,
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HL DECd, (HL) CPr, ( W> == R> ? )
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IFNZ, ( buffer not full )
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( get wr ptr ) HL SIO( LDd(i),
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L ADDr, IFC, H INCr, THEN, L A LDrr,
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( fetch/write ) SIO_ADATA INAi, (HL) A LDrr,
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( advance W> ) SIOW> LDA(i), A INCr,
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SIO_BUFSZ 1- ANDi, SIOW> LD(i)A,
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THEN, HL POP, JR, AGAIN,
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