mirror of
https://github.com/datajerk/c2d.git
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new loader that does not load splash screen directly to 0x400, but to 0x800 and then moves it to 0x400 to avoid overwriting scratchpad ram
This commit is contained in:
Egan Ford
parent
4c9315f2ef
commit
a191c5cd81
26
asm/loader.s
26
asm/loader.s
@ -18,7 +18,7 @@ rwts = $B7B5 ; rwts jsr
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; vars
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stage1 = $800
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stage1 = $C00
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;stage2 = $B600 ; overwrite track 0/sector 0, not needed any more?
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stage2 = $300 ; $300 looks open
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;;;run time
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@ -34,10 +34,32 @@ start:
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grcheck:
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lda *+(gr-loader)+(moved-grcheck)
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beq init
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beq movetext
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lda #0 ; GR mode
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sta $C050
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sta $C053
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movetext:
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ldx #0
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movetx:
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lda $800,x
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sta $400,x
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lda $880,x
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sta $480,x
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lda $900,x
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sta $500,x
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lda $980,x
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sta $580,x
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lda $A00,x
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sta $600,x
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lda $A80,x
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sta $680,x
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lda $B00,x
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sta $700,x
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lda $B80,x
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sta $780,x
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inx
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cpx #120
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bne movetx ; move 120 bytes
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init:
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lda #1 ; read(1)/write(2) command
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ldy #$0C ; offset in RWTS
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BIN
bin/c2d.exe
BIN
bin/c2d.exe
Binary file not shown.
Binary file not shown.
Binary file not shown.
13
c2d.c
13
c2d.c
@ -1,6 +1,6 @@
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/*
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c2d, Code to Disk, Version 0.56
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c2d, Code to Disk, Version 0.57
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(c) 2012,2017 All Rights Reserved, Egan Ford (egan@sense.net)
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@ -43,7 +43,7 @@ Bugs:
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#include "c2d.h"
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#include "holes.h"
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#define VERSION "Version 0.56"
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#define VERSION "Version 0.57"
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#define INFILE argv[argc-2]
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#define OUTFILE argv[argc-1]
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#define BINARY 0
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@ -302,7 +302,11 @@ int main(int argc, char **argv)
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blank.track[1].sector[4].byte[loadersize + 8 + i] = i * num_sectors / bar_length;
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}
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loaderstart = 0x400;
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// this version loads text page right into place, however can cause
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// issues with scratchpad RAM
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// loaderstart = 0x400;
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// load here and move to 0x400 just the text data
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loaderstart = 0x800;
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// temp hack to effect the sound of the drive, i.e. to make consistent
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// longer term put binary payload at end of loader
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@ -320,7 +324,8 @@ int main(int argc, char **argv)
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fprintf(stderr, "Binary Number of sectors: %d\n", (int) ceil((filesize + (loadaddress & 0xFF)) / 256.0));
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fprintf(stderr, "Binary Memory page range: $%02X - $%02X\n", loadaddress >> 8, (loadaddress + filesize - 1) >> 8);
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loaderstart = 0x800;
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//loaderstart = 0x800;
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loaderstart = 0xC00;
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blank.track[0].sector[1].byte[0x3B] = 0x4C;
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blank.track[0].sector[1].byte[0x3C] = loaderstart & 0xFF;
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67
c2d.h
67
c2d.h
@ -9031,7 +9031,7 @@ rwts = $B7B5 ; rwts jsr
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; vars
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stage1 = $800
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stage1 = $C00
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;stage2 = $B600 ; overwrite track 0/sector 0, not needed any more?
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stage2 = $300 ; $300 looks open
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;;;run time
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@ -9047,10 +9047,32 @@ start:
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grcheck:
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lda *+(gr-loader)+(moved-grcheck)
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beq init
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beq movetext
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lda #0 ; GR mode
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sta $C050
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sta $C053
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movetext:
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ldx #0
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movetx:
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lda $800,x
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sta $400,x
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lda $880,x
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sta $480,x
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lda $900,x
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sta $500,x
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lda $980,x
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sta $580,x
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lda $A00,x
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sta $600,x
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lda $A80,x
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sta $680,x
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lda $B00,x
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sta $700,x
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lda $B80,x
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sta $780,x
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inx
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cpx #120
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bne movetx ; move 120 bytes
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init:
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lda #1 ; read(1)/write(2) command
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ldy #$0C ; offset in RWTS
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@ -9150,23 +9172,30 @@ gr:
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end:
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*/
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unsigned char loadercode[] = {
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0xAD,0x87,0x08,0xF0,0x08,0xA9,0x00,0x8D,
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0x50,0xC0,0x8D,0x53,0xC0,0xA9,0x01,0xA0,
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0x0C,0x99,0xE8,0xB7,0xA9,0x00,0xA0,0x08,
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0x99,0xE8,0xB7,0xA9,0x02,0x85,0x04,0xA2,
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0x00,0xBD,0x2D,0x08,0x9D,0x00,0x03,0xE8,
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0x10,0xF7,0x4C,0x00,0x03,0xAD,0x57,0x03,
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0x85,0x02,0xAE,0x55,0x03,0xCA,0xCA,0x86,
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0x00,0xA5,0x04,0xA0,0x04,0x99,0xE8,0xB7,
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0xA5,0x00,0xD0,0x05,0xAD,0x56,0x03,0x10,
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0x02,0xA9,0x0F,0x85,0x03,0xA5,0x03,0xA0,
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0x05,0x99,0xE8,0xB7,0xA5,0x02,0x18,0x65,
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0x03,0xA0,0x09,0x99,0xE8,0xB7,0xA0,0xE8,
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0xA9,0xB7,0x20,0xB5,0xB7,0xB0,0x18,0xA9,
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0x00,0x85,0x48,0xC6,0x03,0x10,0xDE,0xA5,
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0x02,0x18,0x69,0x10,0x85,0x02,0xE6,0x04,
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0xC6,0x00,0x10,0xBD,0x6C,0x58,0x03,0x4C,
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0x69,0xFF
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0xAD,0xBE,0x0C,0xF0,0x08,0xA9,0x00,0x8D,
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0x50,0xC0,0x8D,0x53,0xC0,0xA2,0x00,0xBD,
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0x00,0x08,0x9D,0x00,0x04,0xBD,0x80,0x08,
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0x9D,0x80,0x04,0xBD,0x00,0x09,0x9D,0x00,
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0x05,0xBD,0x80,0x09,0x9D,0x80,0x05,0xBD,
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0x00,0x0A,0x9D,0x00,0x06,0xBD,0x80,0x0A,
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0x9D,0x80,0x06,0xBD,0x00,0x0B,0x9D,0x00,
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0x07,0xBD,0x80,0x0B,0x9D,0x80,0x07,0xE8,
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0xE0,0x78,0xD0,0xCB,0xA9,0x01,0xA0,0x0C,
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0x99,0xE8,0xB7,0xA9,0x00,0xA0,0x08,0x99,
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0xE8,0xB7,0xA9,0x02,0x85,0x04,0xA2,0x00,
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0xBD,0x64,0x0C,0x9D,0x00,0x03,0xE8,0x10,
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0xF7,0x4C,0x00,0x03,0xAD,0x57,0x03,0x85,
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0x02,0xAE,0x55,0x03,0xCA,0xCA,0x86,0x00,
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0xA5,0x04,0xA0,0x04,0x99,0xE8,0xB7,0xA5,
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0x00,0xD0,0x05,0xAD,0x56,0x03,0x10,0x02,
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0xA9,0x0F,0x85,0x03,0xA5,0x03,0xA0,0x05,
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0x99,0xE8,0xB7,0xA5,0x02,0x18,0x65,0x03,
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0xA0,0x09,0x99,0xE8,0xB7,0xA0,0xE8,0xA9,
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0xB7,0x20,0xB5,0xB7,0xB0,0x18,0xA9,0x00,
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0x85,0x48,0xC6,0x03,0x10,0xDE,0xA5,0x02,
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0x18,0x69,0x10,0x85,0x02,0xE6,0x04,0xC6,
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0x00,0x10,0xBD,0x6C,0x58,0x03,0x4C,0x69,
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0xFF
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};
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/*
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;bar.s
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