Building 6502 machine was Re: eBay madness

From: Dwight K. Elvey <dwight.elvey_at_amd.com>
Date: Tue Aug 31 17:34:40 2004

>From: "Philip Pemberton" <philpem_at_dsl.pipex.com>
---snip---

>What I would like to do is build a replica of the MOS KIM-1 (or Synertek
>SYM-1, more likely the latter). I've got a CPU chip, but I'd need to source
>some 6530 (or 6532? can't remember the part number perfectly) RIOT chips or
>emulate them with an FPGA. As for the keyboard, well, there's always
>keyswitches and PCB blanks :)
>In case you haven't guessed, I like the 6502 - never really managed to get to
>grips with Z80 assembler, but 6502 ASM was easy (no worse than learning PIC16
>assembler).
>
>Later.
>--
>Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB,

Hi Phil
 You could use a 6532 in place of the KIM's 6530. It
would require some external decoder logic to get the ROM
data to an external ROM. Also, the internal selects my
be masked different than the permanent selects of the 6532.
This would also require a little translation. There
are no original 6530's with the KIM mask available unless
one trashes a KIM to get it ( don't even think of doing that ).
The SYM-1's don't use a 6530 so that is not an issue for them :)
Dwight
Received on Tue Aug 31 2004 - 17:34:40 BST