- Got a H4 #2 to solder up. I have the board but haven't order any parts for it yet. Don't have a spare shifter and they are quite impossible to find. So this will probably be a board for the new HDMI board in developing stages.
I have a shifter now thanks to Exxos got some in his store.
- Doing a Alt-RAM board with 256Kb ROM switcher on it. Schematics and board has been done. 5 PCB is being made. Parts has been ordered.
PCB has arrived. Not seen the board yet though. I am at my cottage now and the pcb is at home in the flat. In the post box.
- Mega-ST IDE board. Same as rubber_jonnie has done. Made a few changes to the board design. I have soldered one board and have 4 more. I have not burnt the GAL for it yet though. Don't have a Mega or the GAL burner here in the flat. Probably use this with a 27C4001/27C040 and a small board I got some time ago to switch between 4 different ROMs.
Desoldered a IDE/SD board I have and solder in some female pin header instead. Burnt a GAL. Built up two 28 to 32 pin ROM adapter so I can use it for random chips. Burnt TOS 2.06 and TOS 1.04 (with bootable IDE driver) and tried it out. Works great. Installed it in a Mega ST1.
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- Get the PAK68/3-030 to 50MHz. Now at 40 MHz. Need to get hold of FRAK, PuPla or perhaps PCB for or doing board myself. Seems a long way to go.
I might have a PuPla2 and a FRAK board soon. The deal haven't been made yet since shipment in Corona time thru the world/Europe is a bit troublesome. The PuPla is already built but the FRAK is just the PCB so need to order components for that after the deal is done.
- Solder up a IDE-PCB R1C v1.1 i got from exxos. I have the parts for this.
Yes, this is done. Not tested. I haven't got an adapter for 40/44pin IDE or a SD/CF-IDE board with 44pin. I think I have at home in the flat. I might have here. I have to check.
Random STuff
Re: Random STuff
UPDATE
Re: Random STuff
Fixed a STfm board. Sockets on everything. Almost. Changed resistor arrays on data/address bus and 10k resistor array on the WD1772 also. Did a 2 chip conversion by adding the 74LS11 and some solder blobs changing.
But had some troubles and had to check some solder spots since I didn't get it started. Noticed that I had got som solder blobs shorts when using a solder sucker. God I hate those.
Managed to put one of TOS 1.02 chips upside down and got white screen of course on boot. Diag cart didn't work either. Didn't find that problem for a while. Kind of obvious when you do find it:
I happened to do this with a TOS 1.02 german language before and the worked fine so I guess it it just luck if it survives. Those to in the pic is in the garbage now.
Well that boards finally running now.
But had some troubles and had to check some solder spots since I didn't get it started. Noticed that I had got som solder blobs shorts when using a solder sucker. God I hate those.
Managed to put one of TOS 1.02 chips upside down and got white screen of course on boot. Diag cart didn't work either. Didn't find that problem for a while. Kind of obvious when you do find it:
I happened to do this with a TOS 1.02 german language before and the worked fine so I guess it it just luck if it survives. Those to in the pic is in the garbage now.
Well that boards finally running now.
Re: Random STuff
Did a recap on a SR98 PSU for the board above. My keyboard that I fixed is being used with the board above. Need a case for it. Actually need two cases. One for my H4 #2 as well.
Did a transplant meanwell PSU on a MegaST PSU plate for my second Mega ST.
I have ordered some new caps to change them all on both the Mega main board.
I have made schematics for the MV16 cartridge and made a new SMT clone of it. Half as big as the original. So that PCB is on it's way from china.
Did a transplant meanwell PSU on a MegaST PSU plate for my second Mega ST.
I have ordered some new caps to change them all on both the Mega main board.
I have made schematics for the MV16 cartridge and made a new SMT clone of it. Half as big as the original. So that PCB is on it's way from china.
Re: Random STuff
Got some PCB from china. Did the rom decoder board @Smonson linked to in this post. Also got the ROM adapter PCB inspired by Martin Šoltés 32 to 28pin adapter. Tried it out in a Mega 1. Worked right away.
Re: Random STuff
Nice!
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Had bought some 29C010 in TSOP32 package some time ago. So made a adapter PCB for it to fit a DIP28 and also got that in the recent shipment from the PCB manufacturer. Burnt TOS 2.06 on the 29C010 chip and solder up a set and it worked great with the previous ROM decoder board. Will do some test with 29C020 (and maybe 29C040 later on) to get EmuTOS and TOS 2.06 with just a flip of a switch.
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@DoG interesring choice of eprom, what speed are they?
If it ain't broke, test it to Destruction.
Re: Random STuff
Looks like a very good solution for Mega and STFMs
If it ain't broke, test it to Destruction.