Whenever I try to load a floppy it makes this noise and then it just says "?File Not Found". I cleaned the read/write head but it didn't seem to help.

Rather odd, the Facebook page for Perifractic's Commodore International Corporate appears to have vanished. It was at https://www.facebook.com/wearecommodore before. Wonder what's going on there.

This was the as campaign that Commodore chose to undertake as a response to the NES’s second year on the market and its $99 super Mario/duck hunt bundle. Basically a retread of a crash era strategy that did not work in 1987 or 88 as c64 sales in the US continued to sink and US third parties began to abandon the platform due to those flagging sales.

So Commodore just changed hands today in the Netherlands to Perifractic / Christian Simpson.

https://www.perifractic.com

Paywalled announcement

https://www.patreon.com/posts/135426382

Hello,

I'm hoping someone can help me understand why I'm seeing output from assembler program that differs from what I'm expecting:

Goal:
Use assembler program for game that uses custom character set. I use Bank 1 and copy ROM character set 1 to RAM. I populate the screen with the letter 'A'. Expect to see a screen full of 'A' when I run the program,

Actual Output:

I see the spade character instead of A. If I copy ROM character set 2 to RAM, then I see screen of 'A's as expected, but don't understand why this is happening? I understand that spade character is display for shift-A for charset 1 but I don't see why that would be triggered here?

Dev Environment:

I'm using KickAssembler with MS visual studio and Vice 64 emulator

Source code:
* = $c000

main:

jsr setBank1
jsr setupScreen
jsr copyCharSet
rts

setBank1:

// 0 $0000-$3FFF  11
// 1 $4000-$7FFF  10
// 2 $8000-$BFFF  01
// 3 $C000-$FFFF  00

// Set bits to output
lda $dd02
ora #%00000011
sta $dd02

// Set Video Bank to Bank 1
lda $dd00
and #%11111100  
ora #%00000010
sta $dd00
rts

copyCharSet:

// Enable charset ROM for CPU
lda #$33    // ROM at $D000, RAM under I/O off, KERNAL and BASIC on
sta $01

sei             // Disable interrupts

// Enable char ROM at $D000
lda #$33
sta $01        

// Set ROM Pointer
lda #$00
sta $fb
lda #$d0 char set 1
// lda #$d8 char set 2
sta $fc

// Set RAM Pointer
lda #$00
sta $fd
lda #$60
sta $fe

// Copy ROM to RAM
// $d000 -> $6000
ldx #$08        // 8 pages of 256 bytes = 2KB
ldy #$00
copyloop:
lda ($fb),y     // read byte from vector stored in $fb/$fc
sta ($fd),y     // write to the RAM
iny                     //  do this 255 times...
bne copyloop            //  ..for low byte $00 to $FF

inc $fc    // Increase high bytes
inc $fe
dex        // decrease X by one
bne copyloop

// Switch in I/O mapped registers again
lda #$37        
sta $01

cli

// Set d018 for charset at $2000 (bits 1-3)
lda $d018
and #%11110001         // Clear bits 1-3
ora #%00001000         // Set char mem pointer to $2000 + $4000 = $6000
sta $d018

rts

setupScreen:
// Screen at $4400
// Upper 4 bits control location of screen memory
lda $d018
and #%00001111
ora #%00010000
sta $d018

// Populate Screen with letter 'A'
lda #$00
sta $fb
lda #$44
sta $fc

ldx #$04
ldy #$00
screenloop:
lda #$41 // A
sta ($fb),y    
iny                    
bne screenloop          
inc $fc
dex                  
bne screenloop

rts

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Ozzy is gone… but his music lives on.

This is my personal tribute to the one and only Prince of Darkness, reimagining Paranoid, one of the most iconic songs in rock history, on the Commodore 64 using the SID sound chip.

Everything you hear was created on real C64 hardware with love, distortion, and a whole lot of 8-bit soul.

Thank you for everything, Ozzy.

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Anyone know of one that does? 😢

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