jeff-1amstudios

void CheckIfRunningOnServer() {
    char* the_path;               // edx
    char* current_path;           // ebp
    char* time_string;            // eax 
    FILE* f;                      // esi 
    int computer_name_buffer_len; // [esp+0h] [ebp-138h] BYREF
    time_t the_clock;          // [esp+8h] [ebp-130h] MAPDST BYREF
    char* paths[6];               // [esp+Ch] [ebp-12Ch] BYREF
    char computer_name[16];       // [esp+24h] [ebp-114h] BYREF
    char current_directory[260];  // [esp+34h] [ebp-104h] BYREF

jeff-1amstudios

# Re-enables basic debug output in the retail Carmageddon windows95 binary by patching the empty dr_dprintf function.
# Original code: https://github.com/jeff-1amstudios/carmageddon-debug-output/blob/main/dr_dprintf.s
# jeff@1amstudios.com

###############################################################################
# Virtual address of useful functions in carma95 executable.
# These std lib functions are detected by IDA - thats how we know their addresses.
###############################################################################
fputs = 0x004EC550
fopen = 0x004EBF40

jeff-1amstudios

MEMORY SUMMARY
==============

*** AT ERROR TIME ***

BLOCKS:         7897  (+11)
BYTES USED:  4272500  (+5140)

SUMMARISED BY TYPE, IN DESCENDING ORDER OF SIZE:
-----------------------------------------------

jeff-1amstudios

.main_loop
	jsr keyboard_read
	jsr rs232_try_read_byte
	cmp #0
	bne .got_byte				; if we got a byte from serial conn, goto .got_byte...
	jmp .main_loop				; ...  otherwise, jump back to .main_loop
.got_byte
	ldy flash_screen_on_data
	beq .skip_screen_flash			; if screen flashing is not enabled, jump over flashing code
	inc $d020				; border_color++

jeff-1amstudios

FRAME_COUNT = 10                                ; constant for the nbr of sprite frames you have
.frame_counter !byte .FRAME_COUNT               ; variable to keep track of how far through the animation we are
SPRITE_INITIAL_DATA_POINTER = 128               ; sprite data will be read by VIC-II at 128*64 ($2000)

on_screen_refresh
	dec .frame_counter                      ;  frame_counter variable -= 1
	bne .increment_sprite_pointer           ; if frame_counter > 0, goto .increment_sprite_pointer...
	lda #SPRITE_INITIAL_DATA_POINTER        ; ... otherwise, we should reset to the start of the animation
	sta $07f8                               ; reset the sprite pointer to start of sprite data
	ldx #FRAME_COUNT               

jeff-1amstudios

* = $2000                       ; we store data at $2000 (8192 decimal)
!bin my-sprite-data.spr

* = $c000                       ; code starts at $c0000
sprite_0_setup
	lda #128                ; set A=128
	sta $07f8               ; store 128 in sprite #0 data pointer, data will be read by VIC-II from memory location 128*64 ($2000)
	lda $d015               ; $d015 is the sprite-enable register
	ora #%00000001          ; enable sprite #0
	sta $d015

jeff-1amstudios

ldx #0	       ; X = 0
.loop
txa  	         ; copy X to A
sta $0400, x   ; put A at $0400+X
sta $d800, x   ; put A as a color at $d800+x. Color RAM only considers the lower 4 bits, 
               ; so even though A will be > 15, this will wrap nicely around the 16 available colors
inx 	         ; X=X+1
cpx #27        ; have we written enough chars?
bne .loop
rts 	         ; all done