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updated docs

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mrdudz 2015-10-18 23:57:58 +02:00
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commit 5099910b18
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doc/c64.sgml
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@ -116,6 +116,30 @@ cl65 -o file.prg -u __EXEHDR__ -t c64 -C c64-asm.cfg source.s
Please note that in this case a changed start address doesn't make sense, Please note that in this case a changed start address doesn't make sense,
since the program must be loaded to the BASIC start address. since the program must be loaded to the BASIC start address.
<sect>Extras<p>
<sect1>80 Columns conio driver<p>
The C64 package comes with an alternative software driven 80 columns
module <tt/c64-soft80.o/ which uses the memory under I/O between &dollar;d000
and &dollar;ffff.
In memory constrained situations the memory from &dollar;400 to &dollar;7FF
can be made available to a program by calling <tt/_heapadd ((void *) 0x400, 0x400);/
at the beginning of <tt/main()/. Doing so is beneficial even if the program
doesn't use the the heap explicitly because loading a driver (and in fact
already opening a driver file) uses the heap implicitly.
Using <tt/c64-soft80.o/ is as simple as placing it on the linker command
line like this:
<tscreen><verb>
cl65 -t c64 myprog.c c64-soft80.o
</verb></tscreen>
Note that the soft80 conio driver is incompatible with the
<tt/c64-ram.emd (c64_ram_emd)/ extended memory driver and the
<tt/c64-hi.tgi (c64_hi_tgi)/ graphics driver.
<sect>Platform-specific header files<p> <sect>Platform-specific header files<p>
@ -216,6 +240,9 @@ configuration.
palette of the 16 C64 colors). palette of the 16 C64 colors).
</descrip><p> </descrip><p>
Note that the graphics drivers are incompatible with the
<tt/c64-ram.emd (c64_ram_emd)/ extended memory driver and the
<tt/c64-soft80.o/ software 80 columns conio driver.
<sect1>Extended memory drivers<p> <sect1>Extended memory drivers<p>
@ -241,7 +268,7 @@ configuration.
<tag><tt/c64-ram.emd (c64_ram_emd)/</tag> <tag><tt/c64-ram.emd (c64_ram_emd)/</tag>
A driver for the hidden RAM below the I/O area and kernal ROM. Supports 48 A driver for the hidden RAM below the I/O area and kernal ROM. Supports 48
256 byte pages. Please note that this driver is incompatible with any of the 256 byte pages. Please note that this driver is incompatible with any of the
graphics drivers! graphics drivers, or the soft80 conio driver!
<tag><tt/c64-ramcart.emd (c64_ramcart_emd)/</tag> <tag><tt/c64-ramcart.emd (c64_ramcart_emd)/</tag>
A driver for the RamCart 64/128 written and contributed by Maciej Witkowiak. A driver for the RamCart 64/128 written and contributed by Maciej Witkowiak.