search

Jaystonian / Cartridges

Repository for retro computer cartridges
GNU General Public License v3.0
27 stars 5 forks source link

CP/M through-hole cartridges stability #1

Closed schenkmi closed 4 years ago

schenkmi commented 4 years ago

Hi, i've rebuild a CP/M through-hole cartridges, but it looks that it's not running stable. It only startup on my C64-C and shorty after I get weird characters on the screen. Any idea what I'm doing wrong ? Cheers Michael

Jaystonian commented 4 years ago

Which version did you build, the shorty cp/m?On 17 Aug. 2020 8:45 am, Michael Schenk notifications@github.com wrote: Hi, i've rebuild a CP/M through-hole cartridges, but it looks that it's not running stable. It only startup on my C64-C and shorty after I get weird characters on the screen. Any idea what I'm doing wrong ? Cheers Michael

—You are receiving this because you are subscribed to this thread.Reply to this email directly, view it on GitHub, or unsubscribe.

Jaystonian commented 4 years ago

ok looks like you built the "true" version. Where did you find a 74LS12? CP/M carts only worked in silver-label c64 (very first edition) and all C128, which is faster than a 128 internal cpm mode.On 17 Aug. 2020 10:09 am, jaystonian@hotmail.com wrote:Which version did you build, the shorty cp/m?On 17 Aug. 2020 8:45 am, Michael Schenk notifications@github.com wrote: Hi, i've rebuild a CP/M through-hole cartridges, but it looks that it's not running stable. It only startup on my C64-C and shorty after I get weird characters on the screen. Any idea what I'm doing wrong ? Cheers Michael

—You are receiving this because you are subscribed to this thread.Reply to this email directly, view it on GitHub, or unsubscribe.

schenkmi commented 4 years ago

Hi, yes it's the true version. Regarding the 74LS12 I got them from Germany via eBay. So this card will only run on silver-label C64 which for sure I don't own. Do you have a clue why ? I have A C128 and will try it there. They shorty works with all C64 or still only with the silver-label ? Cheers Michael

schenkmi commented 4 years ago

It works on my C128. I've took a short video which can be viewed under https://youtu.be/MPaJR98bfZg. On https://dfarq.homeip.net/commodore-64-cpm-operating-system/ I've found the information that it only works on silver-label C64. Cheers Michael

Jaystonian commented 4 years ago

The shorty is the exact same circuit except the ls12 is replaced by a 10 and a 3g06. Bil Herd suggested the cpm cart didnt work in 64s because of the power supply, but I've tried using HCT chips and other low power chips with a custom power supply, I can't get it working on a 64, maybe its the z80 itself drawing too much power.I like how it runs super fast on a c128 instead of its internal z80. Combine with jiffydos and its a very fast CP/M system.On 17 Aug. 2020 11:59 am, Michael Schenk notifications@github.com wrote: It works on my C128. I've took a short video which can be viewed under https://youtu.be/MPaJR98bfZg. On https://dfarq.homeip.net/commodore-64-cpm-operating-system/ I've found the information that it only works on silver-label C64. Cheers Michael

—You are receiving this because you commented.Reply to this email directly, view it on GitHub, or unsubscribe.

Jaystonian commented 4 years ago

sorry I meant a 74LS11 + 74LS3G06 = 74LS12, not LS10..

From: Michael Schenk notifications@github.com Sent: Monday, August 17, 2020 3:59 PM To: Jaystonian/Cartridges Cartridges@noreply.github.com Cc: Jaystonian jaystonian@hotmail.com; Comment comment@noreply.github.com Subject: Re: [Jaystonian/Cartridges] CP/M through-hole cartridges stability (#1)

It works on my C128. I've took a short video which can be viewed under https://youtu.be/MPaJR98bfZg. On https://dfarq.homeip.net/commodore-64-cpm-operating-system/ I've found the information that it only works on silver-label C64. Cheers Michael

— You are receiving this because you commented. Reply to this email directly, view it on GitHubhttps://github.com/Jaystonian/Cartridges/issues/1#issuecomment-674965519, or unsubscribehttps://github.com/notifications/unsubscribe-auth/ALCQENDCDHFDAO3FBX6QWS3SBFHVHANCNFSM4QBTNOKQ.