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some more tweaking, added docs page

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mrdudz 2015-07-14 17:22:47 +02:00
parent 515a61a302
commit 83391ab67c
6 changed files with 234 additions and 11 deletions
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12
asminc/pce.inc
View File

@ -52,12 +52,22 @@ VDC_DATA_HI = $0003
; bitmap of the palette data is this: 0000000gggrrrbbb. ; bitmap of the palette data is this: 0000000gggrrrbbb.
; You can read and write the DAC-registers. ; You can read and write the DAC-registers.
VCE_CTRL = $0400 ; write$00 to reset VCE = $0400 ; base
VCE_CTRL = $0400 ; write$00 to reset
VCE_ADDR_LO = $0402 ; LSB of byte offset into palette VCE_ADDR_LO = $0402 ; LSB of byte offset into palette
VCE_ADDR_HI = $0403 ; MSB of byte offset into palette VCE_ADDR_HI = $0403 ; MSB of byte offset into palette
VCE_DATA_LO = $0404 ; LSB of 16-bit palette data VCE_DATA_LO = $0404 ; LSB of 16-bit palette data
VCE_DATA_HI = $0405 ; MSB of 16-bit palette data VCE_DATA_HI = $0405 ; MSB of 16-bit palette data
; programmable sound generator (PSG)
PSG = $0800 ; base
; timer
TIMER = $0c00 ; base
TIMER_COUNT = $0c00 TIMER_COUNT = $0c00
TIMER_CTRL = $0c01 TIMER_CTRL = $0c01

3
doc/index.sgml
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@ -137,6 +137,9 @@
<tag><htmlurl url="osi.html" name="osi.html"></tag> <tag><htmlurl url="osi.html" name="osi.html"></tag>
Topics specific to the Ohio Scientific machines. Topics specific to the Ohio Scientific machines.
<tag><htmlurl url="pce.html" name="pce.html"></tag>
Topics specific to NEC PC-Engine (TurboGrafx) Console.
<tag><htmlurl url="pet.html" name="pet.html"></tag> <tag><htmlurl url="pet.html" name="pet.html"></tag>
Topics specific to the Commodore PET machines. Topics specific to the Commodore PET machines.

198
doc/pce.sgml Normal file
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@ -0,0 +1,198 @@
<!doctype linuxdoc system>
<article>
<title>PC-Engine (TurboGrafx) System specific information for cc65
<author>
<url url="mailto:groepaz@gmx.net" name="Groepaz/Hitmen">
<date>2015-07-14
<abstract>
An overview over the PCE runtime system as it is implemented for the
cc65 C compiler.
</abstract>
<!-- Table of contents -->
<toc>
<!-- Begin the document -->
<sect>Overview<p>
This file contains an overview of the PCE runtime system as it comes
with the cc65 C compiler. It describes the memory layout, PCE specific header
files, available drivers, and any pitfalls specific to that platform.
Please note that PCE specific functions are just mentioned here, they are
described in detail in the separate <url url="funcref.html" name="function
reference">. Even functions marked as "platform dependent" may be available on
more than one platform. Please see the function reference for more
information.
<sect>Binary format<p>
The standard binary output format generated by the linker for the PCE target
is a cartridge image with no header. It is of course possible to change this
behaviour by using a modified startup file and linker config.
<sect>Memory layout<p>
cc65 generated programs with the default setup run with the I/O area and a
CHR bank enabled, which gives a usable memory range of &dollar;8000 - &dollar;FFF3.
All boot ROM entry points may be called directly without additional code.
Special locations:
<descrip>
<tag/Text screen and Font/
The text screen is located at VRAM &dollar;0000,
the Font is located at VRAM &dollar;2000.
<tag/Stack/
The C runtime stack is located in system RAM at &dollar;3FFF and growing downwards.
<tag/BSS and Data/
The BSS (uninitialized variables) and Data (initialized variables) sections are
placed one after the other into system RAM at &dollar;2000.
<tag/Heap/
The C heap is located after the end of the Data section and grows towards the C
runtime stack.
<tag/Code/
The startup code is located at &dollar;E000 in the System/Hardware bank. Further
code can be placed in other ROM banks, this must be done manually however.
</descrip><p>
<sect>Platform specific header files<p>
Programs containing PCE specific code may use the <tt/pce.h/ header file.
<sect1>PCE specific functions<p>
<itemize>
<item>waitvblank
<item>get_tv
</itemize>
<sect1>Hardware access<p>
The following pseudo variables declared in the <tt/pce.inc/ include file do
allow access to hardware located in the address space.
<descrip>
<tag><tt/PSG/</tag>
The <tt/PSG/ defines allow access to the PSG chip (Programmable Sound Generator).
<tag><tt/VCE/</tag>
The <tt/VCE/ defines allow access to the VCE chip (Video Color Encoder).
<tag><tt/VDC/</tag>
The <tt/VDC/ defines allow access to the VDC chip (Video Display Controller).
</descrip><p>
<sect>Loadable drivers<p>
All drivers must be statically linked because no file I/O is available.
The names in the parentheses denote the symbols to be used for static linking of the drivers.
<sect1>Graphics drivers<p>
<descrip>
No TGI graphics drivers are currently available for the PCE.
</descrip><p>
<sect1>Extended memory drivers<p>
No extended memory drivers are currently available for the PCE.
<sect1>Joystick drivers<p>
<descrip>
<tag><tt/pce-stdjoy.joy (pce_stdjoy)/</tag>
A joystick driver for the standard two buttons joypad is available.
</descrip><p>
<sect1>Mouse drivers<p>
No mouse drivers are currently available for the PCE.
<sect1>RS232 device drivers<p>
No serial drivers are currently available for the PCE.
<sect>Limitations<p>
<sect1>Disk I/O<p>
The existing library for the PCE doesn't implement C file
I/O. There are no hacks for the <tt/read()/ and <tt/write()/ routines.
To be more concrete, this limitation means that you cannot use any of the
following functions (and a few others):
<itemize>
<item>fclose
<item>fopen
<item>fread
<item>fprintf
<item>fputc
<item>fscanf
<item>fwrite
<item>...
</itemize>
<sect>Other hints<p>
<sect>License<p>
This software is provided 'as-is', without any expressed or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
<enum>
<item> The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
<item> Altered source versions must be plainly marked as such, and must not
be misrepresented as being the original software.
<item> This notice may not be removed or altered from any source
distribution.
</enum>
</article>

18
libsrc/pce/conio.s
View File

@ -59,18 +59,18 @@ conio_init:
st2 #>$2000 st2 #>$2000
; ptr to font data ; ptr to font data
lda #<font lda #<font
sta ptr1 sta ptr1
lda #>font lda #>font
sta ptr1+1 sta ptr1+1
st0 #VDC_VWR ; VWR st0 #VDC_VWR ; VWR
ldy #$80 ; 128 chars ldy #$80 ; 128 chars
charloop: ldx #$08 ; 8 bytes/char charloop: ldx #$08 ; 8 bytes/char
lineloop: lineloop:
lda (ptr1) lda (ptr1)
staio VDC_DATA_LO ; bitplane 0 staio VDC_DATA_LO ; bitplane 0
stzio VDC_DATA_HI ; bitplane 1 stzio VDC_DATA_HI ; bitplane 1
clc ; increment font pointer clc ; increment font pointer
lda ptr1 lda ptr1
@ -90,9 +90,9 @@ fillloop: st1 #$00
bne charloop ; next character bne charloop ; next character
ldx #0 ldx #0
stx BGCOLOR stx BGCOLOR
inx inx
stx CHARCOLOR stx CHARCOLOR
rts rts

2
libsrc/pce/readme.txt
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@ -44,4 +44,4 @@ http://archaicpixels.com/Main_Page
http://www.magicengine.com/mkit/doc.html http://www.magicengine.com/mkit/doc.html
https://github.com/uli/huc https://github.com/uli/huc
http://www.zeograd.com/parse.php?src=hucf http://www.zeograd.com/parse.php?src=hucf

12
testcode/lib/pce/conio.c
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@ -2,6 +2,8 @@
#include <conio.h> #include <conio.h>
#include <time.h> #include <time.h>
#include <joystick.h> #include <joystick.h>
#include <string.h>
#include <stdlib.h>
static int datavar = 10; static int datavar = 10;
@ -10,6 +12,7 @@ void main(void)
int stackvar = 42; int stackvar = 42;
int i, j; int i, j;
clock_t clk; clock_t clk;
char *p;
joy_install(&joy_static_stddrv); joy_install(&joy_static_stddrv);
@ -31,6 +34,15 @@ void main(void)
gotoxy(0,10); gotoxy(0,10);
cprintf("Found %d Joysticks.", j); cprintf("Found %d Joysticks.", j);
for (i = 0; i < 4; ++i) {
gotoxy(0, 17 + i);
p = malloc(16);
memcpy(p, "01234567890abcdef", 16);
cprintf("alloced at: %04p - %c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c", p,
p[0],p[1],p[2],p[3],p[4],p[5],p[6],p[7],p[8],p[9],p[10],p[11],p[12],p[13],p[14],p[15]
);
}
for(;;) for(;;)
{ {
gotoxy(13,4); gotoxy(13,4);