Sinclair ZX80 / ZX81 / Z88 Forums

hsimpson wrote: ↑Tue Sep 19, 2023 11:43 pm The parcel arrived safely. The interface is great. Thanks a lot wilco2009!

Thanks to you

amauget wrote: ↑Sun Sep 10, 2023 9:34 pm Hi wilco2009,

I’m very interested in your SD81 Booster + case.
I’m living in France.

Regards,

You are in the waiting list.

Updated instructions to upgrade the firmware from Linux Install avrdude with the command sudo apt install avrdude Try to uninstall brltty from the system, because it interferes with the CH340 chip driver. sudo apt-get remove --auto-remove --purge brltty Remove the SD81 Booster from the console and c...

The H.É.R.O. already works, but both the CPLD and the arduino must be updated. To update the CPLD the method is the same as the previous time: - Copy the file SD81CPLD.XSVF to the root of the SD, insert the card and power up the zx81 - The status LED will begin to flash warning that the CPLD is goin...

1024MAK wrote: ↑Sat Sep 09, 2023 11:08 am Hello wilco2009,

I’m interested in your SD81 Booster. I would like one with a case.

I’m in the U.K.
I’ll send you a PM.

Mark

Ok, you are in the list. When we have enough people for a new batch, I will contact you.

https://codeberg.org/Retrostuff/SD81-Bo ... ontent/SYS

I have added the modified BigBang ROMs to the SDCONTENT\SYS folder to work with all the interface functions.

I have not tested yet with this ROM, but in theory it is possible to test BigBang ROM just using LOAD FAST "zx81x2.rom". It will load the ROM an will reset the system with the new ROM. Unfortunatelly this ROM has not extensions to use the SD. It could change in the future if I contact with the BigB...

Do you have a modified version for use with SD81 of the BigBang ROM as well? https://www.sinclairzxworld.com/viewtopic.php?f=5&t=2986 I have not tested yet with this ROM, but in theory it is possible to test BigBang ROM just using LOAD FAST "zx81x2.rom". It will load the ROM an will reset the syste...

Next bacth ready to be sent.



In some days, update for compatibility with H.E.R.O......

I'll explain you the background of the few games that didn't work: The SD81Booster is an interface that completely replaces the ROM and internal RAM of the ZX81 with a RAM chip, existing in the interface, that performs both functions. This allows, for example, to be able to hot load the Forth ROM th...