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movable sp for sim65

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bbbradsmith
2019-05-28 15:29:55 -04:00
committed by Oliver Schmidt
parent 38d2eb7a0e
commit 2f3cae0d2e
8 changed files with 33 additions and 18 deletions
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7
doc/sim65.sgml
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@@ -144,8 +144,9 @@ Without using the provided target library, there are some relevant internal deta
<itemize>
<item>The binary input file has a 1 byte header. A value of 0 indicates 6502 simulation,
and 1 indicates 65C02.
<item>The binary input file has a 2 byte header. The first byte indicates CPU type:
0 = 6502, 1 = 65C02. The second byte is the address of the C parameter stack pointer
<tt/sp/, used by the paravirtualization functions.
<item>The rest of the input file, after the header, will be loaded at <tt/$0200/,
and execution will begin at <tt/$0200/.
@@ -160,7 +161,7 @@ Jumping to this address will terminate execution with the A register value as an
<item>The built-in functions are provided by 6 paravirtualization hooks present at
<tt/$FFF0-$FFF5/. Except for <tt/exit/, a <tt/JSR/ to one of these
addresses will return immediately after performing a special function,
intended only for use with the sim65 target C library.
intended for use with the sim65 target C library.
<item><tt/IRQ/ and <tt/NMI/ events will not be generated, though <tt/BRK/
can be used if the IRQ vector at <tt/$FFFE/ is manually prepared by the test code.