Kevin Palser

Dad, iOS/iPadOS developer, lover of 80s computers, catalanòfil

[Kevin Palser @kpalser]

It’s been about 35 years since the boy was used but my 6 year old seems to be loving it #speak&maths

[Kevin Palser @kpalser]

@NotoriousNoto92 @wartranslated Perhaps concern that loved ones back home might suffer repercussions is a factor.

[Kevin Palser @kpalser]

@eduo The app has been on App Store since December 2016. The tape loading was disabled up to this version. It supports the .P (ZX81) and .O (ZX80) file extensions.

[Kevin Palser @kpalser]

First and foremost I don’t encourage piracy. I was surprised this was approved as I was testing the waters with Apple’s new guidelines. My submission included a video loading a file and quoting the 2.5.2 rule. Pigs fly.

[Kevin Palser @kpalser]

So does Apple’s change to their rules today mean I can turn on the ability for users to load tape files in my #ZX81 & #JupiterACE iOS/iPadOS apps?

[Kevin Palser @kpalser]

@douglasmun They seem to target free apps to mask their activity. I ended up having to remove my free iOS/iPadOS from the App Store for a certain nation (you can probably guess which). It would get crazy download figures on a random day eclipsing everything else by a thousand fold margin.

[Kevin Palser @kpalser]

@EruchAdams @albafella1 They might have other considerations such as how their family / loved ones will be treated if they start an uprising.

[Kevin Palser @kpalser]

@Rainmaker1973 Seems more tech savvy than my parents

[Kevin Palser @kpalser]

Latest retro computer book. Signed by the the author. Thanks @MarquisdeGeek

[Kevin Palser @kpalser]

@JohnKennedyEsq How do you find the time? Downloading!

[Kevin Palser @kpalser]

@fr8d Well, he was aware of the Apple Watch under the general umbrella of wearable devices. And in a broad sense he’d seen many ideas about wearable devices and glasses would certainly have been amongst them but unlikely any brief that would have aligned well to the Vision Pro

[Kevin Palser @kpalser]

@fr8d @zx81gaming Thanks for the kind words! You might also like its sister app, Jupiter ACE, developed from starting from the same base project code. If you have time please leave a review on the App Store.

[Kevin Palser @kpalser]

@ezContents @level106 A sort of related Easter egg in the ZX81 iOS/iPadOS app: Change settings to NTSC and >1K RAM to update the logo & keyboard styling. This was broken in the app until I saw your tweet, which prompted me to test and fixed it with an update.

[ezContents (Marek) 💾 @ezContents]

Which one is your favo(u)rite?

[Kevin Palser @kpalser]

@Molitronix72 @ezContents The ROM was slightly different in the T1500. It fixed one bug and introduced another.

[Kevin Palser @kpalser]

@Molitronix72 @ezContents If memory serves me they also had more shielding in the form of a small metal panel to meet US regulations.

[Kevin Palser @kpalser]

@ezContents @Raxor1Robin NTSC models have less vertical margin lines. Z80 processor time is used to generate the screen output and the user program is executed during these lines. Less lines / more frames for NTSC results in slower execution of user programs and ocasional race incompatibility conditions.

[Kevin Palser @kpalser]

It’s been almost 8 months since the previous #ZX81 iOS/iPadOS app update.

[Kevin Palser @kpalser]

@80sNostalgia Took me a few attempts for this to go on my device.

When bugs did arise back in the day it was a far more painful affair. If there was a problem we had to live without a fix. Remember even the ZX81 went through three ROM editions.

[Kevin Palser @kpalser]

@ashleymills Definitely interested in testing - have already sent you an email on Saturday