Depending on the programmer, you could use an adapter cable from the programmer to a clip to go directly on the chip. Mike would probably have a more definative answer. The type of EPROM/EEPROM soldered in could matter as well.
Nov 1, 2020 9:52:58 AM Brian White <[email protected]>: > Some kind of borked re-send of a draft. Didn't I already send a proper > version of that? > > Anyway disregard the last bit. I was starting to wonder if Mike's board might > work as it's own programming adapter because it includes both the old and new > pinouts. But that was silly and won't work because you can't install both > sets of pins at the same time. > > On Sun, Nov 1, 2020, 11:44 AM Brian White <[email protected]> wrote: > >> Teeprom is for the option rom. >> >> FlexROM_100 or FlexROM_102 is the main rom. >> >> Well really just the 100. >> >> No one really needs the 102 version because for 102 you can just use a plain >> 27C256 which is a lot simpler. Just for 102 you want to get some chipquick >> or fastchip desoldering alloy to get the old rom out without drama or damage. >> >> For main rom in a 100, FlexROM_100, >> >> http://tandy.wiki/FlexROM_100 >> >> or Mike Stein's board. >> >> https://oshpark.com/shared_projects/Kil9S1ya >> >> If you use flexrom, and you get a soic test clip, the you can re-write the >> rom after it's soldered. >> For Mike's board, I don't know, the board itself might serve >> >> On Sat, Oct 31, 2020, 7:12 PM Stephen Adolph <[email protected]> wrote: >> >>> On Sat, Oct 31, 2020 at 5:52 PM Joe Grubbs <[email protected]> wrote: >>> >>>> Aww yeah! I'm liking where this is going. Will the sluggish original ROM >>>> handle 8Mhz+? >>>> >>> No, for sure not. Right now I have a 120nsec EEPROM in the socket and it >>> supports 6.2 MHz. >>> >>> If I simply place the original ROM back in - no go. >>> >>> But the Main ROM is the easiest thing to replace. It is already socketed! >>> There are many ways to address it. >>> >>> So far here are the changes to run 6.2 MHz (my current setup) >>> >>> 1) you need a faster CPU + crystal. I'm making a board for that. Which >>> CPU - TBD. There are a few choices. (I really should try the stock CPU >>> and see how fast it really is. I am currently using the 8MHz Tundra 80C85 >>> CPU) >>> >>> 2) you need faster RAM. You could use REXCPM to solve that problem. >>> Otherwise... a lot of soldering work! >>> >>> 3) faster main ROM. Teeprom would be a good solution here. >>> >>> 4) improved M2. stock = TC40H245 (good to 5MHz). I have piggybacked >>> 74HC245 (6MHz) >>> >>> I'm puzzled by what is failing to work at 8.2 MHz. Everything so far looks >>> ok. I'll keep poking around.... >>> >>>>>>
