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Added atmos and new c16 target

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git-svn-id: svn://svn.cc65.org/cc65/trunk@1580 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
2002-11-22 02:31:12 +00:00
parent 133887acbd
commit 3274257528
4 changed files with 85 additions and 12 deletions
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24
doc/internal.txt
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@@ -114,6 +114,15 @@ Supported systems at this time are: C64, C128, Plus/4, CBM 500, CBM 600/700,
the newer PET machines (not 2001), Atari 8bit, and the Apple ][ (thanks to
Kevin Ruland, who did the port).
C16: Works with unexpanded or memory expanded C16 and C116 machines.
However, a maximum of 32KB from the total memory is used. The Plus/4
target supports up to 64K of memory, but has a small code overhead
because of the banking routines involved. Apart from this additional
overhead, the Plus/4 target and the C16 target are the same. 16K
machines (unexpanded C16) have 12K of memory for C programs available,
machines with 32K or more have 28K available. The actual amount of
memory is auto detected.
C64: The program runs in a memory configuration, where only the kernal ROM
is enabled. The text screen is expected at the usual place ($400), so
50K of memory are available to the program.
@@ -128,8 +137,8 @@ Plus/4: Unfortunately, the Plus/4 is not able to disable only part of it's
free memory is reduced to 12K).
CBM 500:
The C program runs in bank #0 and has a total of 48K memory available.
This is less than what is available on its bigger brothers (CBM
The C program runs in bank #0 and has a total of 48K memory available.
This is less than what is available on its bigger brothers (CBM
600/700) because the character data and video RAM is placed in the
execution bank (#0) to allow the use of sprites.
@@ -179,10 +188,7 @@ assembler file.
Example, insert a break instruction into the code:
asm ("\t.byte\t$00")
Note: The \t in the string is replaced by the tab character, as in all other
strings.
asm ("brk")
Beware: Be careful when inserting inline code since this may collide with
the work of the optimizer.
@@ -201,7 +207,9 @@ functions results and pass parameters.
This feature is useful with inline assembly and macros. For example, a macro
that reads a CRTC register may be written like this:
#define wr(idx) (__AX__=(idx), \
asm("\tsta\t$2000\n\tlda\t$2000\n\tldx\t#$00"), \
#define wr(idx) (__AX__=(idx), \
asm ("sta $2000"), \
asm ("lda $2000"), \
asm ("ldx #$00"), \
__AX__)