Search found 8 matches

by roganjosh
Thu Feb 07, 2019 9:32 am
Forum: Hardware
Topic: Jupiter Ace - Case Dimensions
Replies: 17
Views: 1737

Re: Jupiter Ace - Case Dimensions

I built the SDHC interface using a PIC18F25K40 which is on my main PCB along with all the other standard ACE chips. The interface relies on there being a ROM between e000-ffff to contain the low level code for communication between the Z80 CPU and the PIC, plus the new FORTH words which use that cod...
by roganjosh
Sat Feb 02, 2019 9:31 am
Forum: Hardware
Topic: Jupiter Ace - Case Dimensions
Replies: 17
Views: 1737

Re: Jupiter Ace - Case Dimensions

That looks like a lovely neat idea. I did a similar thing last year for my ARV1 (Ace Revamped) design but in a much bigger case - a dk'tronics keyboard one. That has the Jupiter Ace circuit with the following changes. a) ROMs are AT28C64-15 - one at 0-1FFF is essentially the ACE ROMs in one chip, th...
by roganjosh
Mon Jul 23, 2018 7:54 am
Forum: SALES
Topic: ZX81 ULA
Replies: 70
Views: 17539

Re: ZX81 ULA

I don't get it :?: It does appear rather out of context with the original exchange having been a while ago, and likely exacerbated by my no-smiley policy. Explaining humour is generally a very bad idea though. As for smileys, opinions differ and one should certainly not be militant about such thing...
by roganjosh
Sun Jul 22, 2018 6:18 pm
Forum: SALES
Topic: ZX81 ULA
Replies: 70
Views: 17539

Re: ZX81 ULA

Lardo Boffin wrote:
Wed Jul 04, 2018 10:59 am
I’m not paranoid. They are out to get me. :? :D


Ah, yes, quite right, my mistake. I forgot your distinction. I believe you. Honestly.


Alan
by roganjosh
Sun Jul 22, 2018 10:12 am
Forum: SALES
Topic: ZX81 ULA
Replies: 70
Views: 17539

Re: ZX81 ULA

Lardo Boffin wrote:
Sat Jul 21, 2018 12:36 pm
Got one! :D

Congratulations! Keep up that paranoia.


Alan
by roganjosh
Thu Jul 05, 2018 7:23 am
Forum: Welcome Area
Topic: Wandering across
Replies: 5
Views: 1130

Re: Wandering across

Thanks all, and especially to Mark for the useful archive information.

Alan
by roganjosh
Wed Jul 04, 2018 11:30 am
Forum: Welcome Area
Topic: Wandering across
Replies: 5
Views: 1130

Wandering across

Good morning. Having recently wandered across from stardot, C64 forums and others, subscribed under the same username, I see many familiar names here (1024mak, sirmorris, lardo etc) so at the risk of boring them with my life history once more... I'm a FORTRAN programmer for a few years and a C progr...
by roganjosh
Wed Jul 04, 2018 9:23 am
Forum: SALES
Topic: ZX81 ULA
Replies: 70
Views: 17539

Re: ZX81 ULA

Argh! Missed out again! These things go faster than hot cakes. If it's any consolation I was looking at the sellmyretro entry last night and this morning. From the 8 made available there were still four left when I hit the sack and at 06.00 today there were still two. So at least you've not got muc...