Discussion forums for users of the Cambridge Z88 Portable Computer
- Posts: 21
- Joined: Sat Apr 22, 2023 7:48 am
I have a 32k EPROM cart that previously had PCLink burned on it, so I know it works.
I have run it through an EPROM eraser three times for a total of an hour and a half of exposure; it still will not catalogue.
Today, after the third erase cycle, I plugged it in (after switching to Index like I’m supposed to), and the screen blacked out and flickered and the machine hard reset, losing a bunch of work.
- Posts: 93
- Joined: Sun May 14, 2023 3:58 pm
- Location: Cambridgeshire, UK
I believe it is possible to kill an EPROM with too much UV. There's a limit to how many times you can erase them due to the damage it does.
ZX81 with ZiLOG Z84 CMOS Z80, 32KB battery-backed Toshiba 55257 SRAM with charge status LED, Wilf's "Why Wait?" mod and switch-mode 5V regulator. 50/60Hz mode switch, composite video output with Zigg's back porch mod and 1080p60 HDMI output.
- Posts: 61
- Joined: Thu Apr 23, 2020 6:58 pm
A known problem is leaving eprom cards in z88s without power. Apparently that can lead to them being corrupted?? It's written about on the Rakewell shop site