Real hardware
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This is a real hardware question ;). I'm going to build something of an old C64 computer, I only want to take the processor, and as few components as possible. I'm going to do a hardware that displays time in binary. I'll need the ROM to, or at least another ROM, the program I want to write is like this in assembly:
org 100h xor cx,cx xor dx,dx start: inc eax cmp eax,07FFFFFh ;clockspeed in hz je sec jmp start sec: xor eax,eax inc bl push dx push ax mov ch,bl call printANuminCHwithSpace mov ch,cl call printANuminCHwithSpace mov ch,dl call printANuminCH MOV dl, 13 ; print char MOV ah, 02h INT 21h MOV dl, 10 ; print char MOV ah, 02h INT 21h pop ax pop dx cmp bl,60 je min jmp start min: xor bl,bl inc cl cmp cl,60 je h jmp start h: xor cl,cl inc dl cmp dl,24 je day jmp start day: xor dl,dl jmp start printANuminCH: push ax push dx xor ax, ax mov al, ch ;2 char mov dh, 100 ;1 char skipping this for now div dh add al, 30h MOV dl, al ; print char MOV ah, 02h INT 21h xor ax, ax mov al, ch ;2 char mov dh, 100 div dh mov al,ah xor ah,ah mov dh,10 div dh add al, 30h MOV dl, al ; print char MOV ah, 02h INT 21h xor ax, ax mov al, ch ;last char mov dh, 10 div dh add ah, 30h MOV dl, ah ; print char MOV ah, 02h INT 21h pop dx pop ax ret printANuminCHwithSpace: push dx push ax call printANuminCH MOV dl, 20h ; print char MOV ah, 02h INT 21h pop ax pop dx ret
The displaying code isn't going to be there. Here's how it could look like when implemented: The ports should be replaced and represented by their appropriate value.org 100h xor cx,cx xor dx,dx start: inc ax cmp ax,0FFFFh ;clockspeed in hz je sec jmp start sec: xor ax,ax inc bl out bl,0h cmp bl,60 je min jmp start min: xor bl,bl inc cl out cl,1h cmp cl,60 je h jmp start h: xor cl,cl inc dl out dl,2h cmp dl,24 je day jmp start day: xor dl,dl jmp start
Is there any good company, (europe should be best, I live in Sweden), that makes ROMs? How much could it cost. I don't want to use to much money. I need 17 outputs, do I need a multiplexer? Where could I get one? How is the machine code in the C64? Thanks in advance Niklas Ulvinge -
This is a real hardware question ;). I'm going to build something of an old C64 computer, I only want to take the processor, and as few components as possible. I'm going to do a hardware that displays time in binary. I'll need the ROM to, or at least another ROM, the program I want to write is like this in assembly:
org 100h xor cx,cx xor dx,dx start: inc eax cmp eax,07FFFFFh ;clockspeed in hz je sec jmp start sec: xor eax,eax inc bl push dx push ax mov ch,bl call printANuminCHwithSpace mov ch,cl call printANuminCHwithSpace mov ch,dl call printANuminCH MOV dl, 13 ; print char MOV ah, 02h INT 21h MOV dl, 10 ; print char MOV ah, 02h INT 21h pop ax pop dx cmp bl,60 je min jmp start min: xor bl,bl inc cl cmp cl,60 je h jmp start h: xor cl,cl inc dl cmp dl,24 je day jmp start day: xor dl,dl jmp start printANuminCH: push ax push dx xor ax, ax mov al, ch ;2 char mov dh, 100 ;1 char skipping this for now div dh add al, 30h MOV dl, al ; print char MOV ah, 02h INT 21h xor ax, ax mov al, ch ;2 char mov dh, 100 div dh mov al,ah xor ah,ah mov dh,10 div dh add al, 30h MOV dl, al ; print char MOV ah, 02h INT 21h xor ax, ax mov al, ch ;last char mov dh, 10 div dh add ah, 30h MOV dl, ah ; print char MOV ah, 02h INT 21h pop dx pop ax ret printANuminCHwithSpace: push dx push ax call printANuminCH MOV dl, 20h ; print char MOV ah, 02h INT 21h pop ax pop dx ret
The displaying code isn't going to be there. Here's how it could look like when implemented: The ports should be replaced and represented by their appropriate value.org 100h xor cx,cx xor dx,dx start: inc ax cmp ax,0FFFFh ;clockspeed in hz je sec jmp start sec: xor ax,ax inc bl out bl,0h cmp bl,60 je min jmp start min: xor bl,bl inc cl out cl,1h cmp cl,60 je h jmp start h: xor cl,cl inc dl out dl,2h cmp dl,24 je day jmp start day: xor dl,dl jmp start
Is there any good company, (europe should be best, I live in Sweden), that makes ROMs? How much could it cost. I don't want to use to much money. I need 17 outputs, do I need a multiplexer? Where could I get one? How is the machine code in the C64? Thanks in advance Niklas UlvingeRadio Shack used to sell ROMS (EPROMS) and the burners - but that was ages ago ... perhaps you can look on-line?
:..::. Douglas H. Troy ::..
Fold with us|Development Blogging|viksoe.dk's site -
Radio Shack used to sell ROMS (EPROMS) and the burners - but that was ages ago ... perhaps you can look on-line?
:..::. Douglas H. Troy ::..
Fold with us|Development Blogging|viksoe.dk's siteDo you remmember any prise? It should be cheeper now or more expensive... Thanks for your reply anyway Niklas Ulvinge aka IDK
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Do you remmember any prise? It should be cheeper now or more expensive... Thanks for your reply anyway Niklas Ulvinge aka IDK
No, sorry I don't ... but if you go to Google and search for EPROMs and/or IC chips, you'll probably find a company that "deals" in that type of thing ...
:..::. Douglas H. Troy ::..
Fold with us|Development Blogging|viksoe.dk's site