[2017-04-03 19:18:03 CEST] * siggi joined [2017-04-03 19:30:16 CEST] ACTION tesing ZX81NU with backplane [2017-04-03 19:41:58 CEST] * siggi quit (EOT) [2017-04-04 22:15:12 CEST] * Outsoft joined [2017-04-04 22:53:18 CEST] * Outsoft quit (Leaving...) [2017-04-06 09:19:04 CEST] * fuzb quit (ping timeout) [2017-04-06 10:46:20 CEST] * fuzb joined [2017-04-07 21:34:01 CEST] * zx81jens joined [2017-04-07 22:32:21 CEST] * zx81jens quit (EOT) [2017-04-07 22:54:41 CEST] * Outsoft joined [2017-04-07 22:55:08 CEST] * Outsoft quit (Leaving...) [2017-04-08 21:25:31 CEST] * Outsoft joined [2017-04-08 22:03:02 CEST] * Outsoft quit (Leaving...) [2017-04-09 19:56:41 CEST] * rune joined [2017-04-09 20:01:03 CEST] * heinz joined [2017-04-09 20:01:24 CEST] Hello heinz [2017-04-09 20:03:47 CEST] hello dave, half an hour? [2017-04-09 20:03:59 CEST] wait or stay? [2017-04-09 20:04:06 CEST] talk. [2017-04-09 20:04:24 CEST] ok, i need a shave so yes 30 minutes [2017-04-09 20:04:38 CEST] some news? [2017-04-09 20:05:12 CEST] Me, not much. Found a nice article about getting floating point precission with integer in forth [2017-04-09 20:05:37 CEST] But the good weather means O am outside until bedtime [2017-04-09 20:05:46 CEST] I [2017-04-09 20:05:55 CEST] me too. [2017-04-09 20:06:15 CEST] I found a lot of silver coins cheap at the flea market [2017-04-09 20:06:29 CEST] Bout 120g worth for 16.00 [2017-04-09 20:06:36 CEST] what countries? [2017-04-09 20:06:49 CEST] good pprice. [2017-04-09 20:06:58 CEST] at 50% silver thats 29.00 in melt value so instant 13.00 profit [2017-04-09 20:07:21 CEST] Left about the same, there was a hindenurg 2mark as well [2017-04-09 20:07:37 CEST] good quality? [2017-04-09 20:07:41 CEST] Maybe buy the rest next weekend [2017-04-09 20:08:09 CEST] Quality is OK. I was just looking at scrap metal prices. [2017-04-09 20:08:23 CEST] do you have a big fllea market iin town? [2017-04-09 20:08:45 CEST] No, we tend to have car-boot sales and charity shops. [2017-04-09 20:09:09 CEST] do you bed oon increasing silver price? [2017-04-09 20:09:14 CEST] Shop I go to is run by a lady who does house clearance and sells things for people. [2017-04-09 20:09:54 CEST] silver is going up again. When we started at christmas it was 12.80 - its now 14.60+ [2017-04-09 20:10:31 CEST] If trump sends more bombs to Syria or N Kporea precious metal prices will shoot sky high [2017-04-09 20:10:45 CEST] i have news: my h4th forth is running with vdrive. [2017-04-09 20:11:03 CEST] What! Brilliant [2017-04-09 20:11:27 CEST] i can store/load now via vdrive. [2017-04-09 20:11:44 CEST] extended rom burned. [2017-04-09 20:11:55 CEST] So, if I swapped the ZX81 rom in the ZX Nu, for a H4th one.... [2017-04-09 20:12:32 CEST] the time is not ready for nu. [2017-04-09 20:12:44 CEST] Would it be possible to have ZX81 and H4th Roms instead of ZX80 and 81 [2017-04-09 20:12:55 CEST] the nu is using other addresses. [2017-04-09 20:13:05 CEST] Ah, I was excited there :( [2017-04-09 20:13:36 CEST] I will need to get my finger out and borrow the Eprom programmer from work [2017-04-09 20:13:41 CEST] zx80 <-> h4th is possible. [2017-04-09 20:13:48 CEST] i have it. [2017-04-09 20:14:09 CEST] You have everything. [2017-04-09 20:14:20 CEST] Oh, thanks for the link to Mahlerts [2017-04-09 20:14:37 CEST] oliver, the father of nu,, has helped me. [2017-04-09 20:15:06 CEST] first one has to replace the ram into 32k [2017-04-09 20:15:09 CEST] Can you get a catalog and delete files ? [2017-04-09 20:15:18 CEST] then a different rom. [2017-04-09 20:16:06 CEST] my vdrive run on a real zx81 with a new rom and 16k ram. [2017-04-09 20:16:44 CEST] Does all the system variable etc then become 16K? [2017-04-09 20:16:45 CEST] i can send all vdrive-commands to the vdrive. [2017-04-09 20:17:02 CEST] +16K [2017-04-09 20:17:12 CEST] so i cann do everything with the vdrive. [2017-04-09 20:17:24 CEST] including cat or erase. [2017-04-09 20:17:37 CEST] but erase is eassier on a pc. [2017-04-09 20:18:02 CEST] Fantastic, I was considering a Jupiter Ace [2017-04-09 20:18:19 CEST] Is there any changes to the motherboard or wiring [2017-04-09 20:18:30 CEST] the user program are txt-files. [2017-04-09 20:18:48 CEST] wiring: yes. [2017-04-09 20:19:12 CEST] 16k ram needs a soocket and different wiring. [2017-04-09 20:19:13 CEST] is it easy for someone like me to do? [2017-04-09 20:19:18 CEST] 3 lines. [2017-04-09 20:19:29 CEST] address lines? [2017-04-09 20:19:37 CEST] the samme with the 16k rom. [2017-04-09 20:19:55 CEST] yes, address lines. [2017-04-09 20:20:08 CEST] So, I have three board which have a backporch but no display. [2017-04-09 20:20:17 CEST] and chiip enable. [2017-04-09 20:20:37 CEST] ??? [2017-04-09 20:20:50 CEST] If I add the 32k RAM chip and your mods. I could add a H4th ROM and vDrive [2017-04-09 20:20:59 CEST] no display? [2017-04-09 20:21:03 CEST] I think RAM is bad on the boards [2017-04-09 20:21:28 CEST] But adding a working RAMPACk doesnt help [2017-04-09 20:21:37 CEST] ok. [2017-04-09 20:22:05 CEST] I have an incentive to get them working thouhj [2017-04-09 20:22:09 CEST] though [2017-04-09 20:22:12 CEST] if you want too preppare the boards for h4th then you have do the following: [2017-04-09 20:23:31 CEST] 1. 2x14 pin socket for thhe new ram. [2017-04-09 20:24:17 CEST] before you solder in the new soocket you have to cut some lines under the socket. [2017-04-09 20:24:47 CEST] then you need a ram 62256. [2017-04-09 20:25:12 CEST] but only one 16k bankk wiill be used. [2017-04-09 20:26:02 CEST] 2. you have to cot some lines at the rom socket. [2017-04-09 20:26:35 CEST] then you have to wire: 2x3 lines. [2017-04-09 20:26:55 CEST] that is all. [2017-04-09 20:27:15 CEST] # [2017-04-09 20:27:18 CEST] OK, I have 32K RAM [2017-04-09 20:27:49 CEST] Is the RAM you mentioned bits or bytes [2017-04-09 20:27:59 CEST] so you get a h4th-zedddy with 166k ram. [2017-04-09 20:28:12 CEST] bits. [2017-04-09 20:28:43 CEST] 8x32k bits [2017-04-09 20:29:10 CEST] Sounds the same as the stuff I have [2017-04-09 20:29:19 CEST] o.k. [2017-04-09 20:29:35 CEST] Except the mod instructions has the 16K low bank activated [2017-04-09 20:29:42 CEST] if this macchine will run, you cold add a vdrive. [2017-04-09 20:29:49 CEST] So I need to activate the upper bank [2017-04-09 20:30:01 CEST] could instead of cold [2017-04-09 20:30:13 CEST] I'll do my best [2017-04-09 20:30:31 CEST] a VDRIVE/Forth setup is exciting. [2017-04-09 20:30:37 CEST] do you have an eprom runnng? [2017-04-09 20:31:04 CEST] No, I am lazy and havent looked at the programmer yet. [2017-04-09 20:31:22 CEST] i mean in your zx811? [2017-04-09 20:31:23 CEST] Got loads of Eprom and an eraser [2017-04-09 20:31:27 CEST] zx81 [2017-04-09 20:31:36 CEST] No, its standard ROMs [2017-04-09 20:31:54 CEST] you would have to change it. [2017-04-09 20:32:02 CEST] is it socckt? [2017-04-09 20:32:07 CEST] Yes, [2017-04-09 20:32:18 CEST] socketed [2017-04-09 20:32:23 CEST] I think ROMs are socketed on some of the boards [2017-04-09 20:32:30 CEST] Or is it ULAs? [2017-04-09 20:32:44 CEST] No problem to take the ROM out though [2017-04-09 20:32:51 CEST] ulla ever, roms sometimes. [2017-04-09 20:33:03 CEST] i have iss1 here. [2017-04-09 20:33:12 CEST] I've swapped ULAs [2017-04-09 20:33:18 CEST] but doesnnt matter which vers.. [2017-04-09 20:33:36 CEST] I have a very early Issue 1 8105 datestamp [2017-04-09 20:33:47 CEST] and 2 iss 2 [2017-04-09 20:34:17 CEST] i have connected the vdrive at the egde connectoor using an old zx-printer cable. [2017-04-09 20:34:50 CEST] No other componnents or boards? [2017-04-09 20:34:56 CEST] i will send you some pictures. [2017-04-09 20:35:15 CEST] Yes please, it sounds like a great project [2017-04-09 20:35:31 CEST] the vdrive is from stefann together with a small driver board. [2017-04-09 20:35:54 CEST] Does he sell them? [2017-04-09 20:35:57 CEST] he was selling for 12eur. [2017-04-09 20:36:13 CEST] Thyats a lot cheaper that the VDrive for the ZXNU [2017-04-09 20:36:20 CEST] yes. [2017-04-09 20:36:28 CEST] i bought four. [2017-04-09 20:36:41 CEST] i could giive ou one. [2017-04-09 20:37:17 CEST] I dont want to take all your stock, but if you want to sell me one, I will happily pay [2017-04-09 20:37:19 CEST] they are not boxed of course. [2017-04-09 20:37:25 CEST] Thats OK [2017-04-09 20:37:37 CEST] yes iwill do. [2017-04-09 20:38:06 CEST] and buy some more from stefan. [2017-04-09 20:38:16 CEST] Let me know how much please and I'll send by paypal [2017-04-09 20:38:38 CEST] so, lets stop for today. next week is easern [2017-04-09 20:38:43 CEST] eastern [2017-04-09 20:38:48 CEST] Yes, rolling eggs? [2017-04-09 20:38:53 CEST] we are not at home. [2017-04-09 20:39:09 CEST] OK, I'll catch you in 2 weeks? [2017-04-09 20:39:17 CEST] vissiting the city augsburg and eating eggs. [2017-04-09 20:39:29 CEST] chocolate eggs? [2017-04-09 20:39:30 CEST] coloerd of course. [2017-04-09 20:39:35 CEST] colored [2017-04-09 20:39:47 CEST] yes, in 2 weeks agaain. [2017-04-09 20:39:57 CEST] OK, nice talk. Bye [2017-04-09 20:40:01 CEST] bye [2017-04-09 20:40:09 CEST] * rune quit (Leaving) [2017-04-09 20:40:11 CEST] vquit [2017-04-09 20:40:17 CEST] * heinz quit (EOT)