{"id":1029,"date":"2020-10-11T14:27:31","date_gmt":"2020-10-11T14:27:31","guid":{"rendered":"http:\/\/wordpress.hertell.nu\/?p=1029"},"modified":"2025-03-16T18:39:22","modified_gmt":"2025-03-16T18:39:22","slug":"building-the-amiga-2000-replica","status":"publish","type":"post","link":"https:\/\/wordpress.hertell.nu\/?p=1029","title":{"rendered":"Building the Amiga 2000 Replica"},"content":{"rendered":"

This is a guide how to build the Amiga 2000 Replica.<\/p>\n

(not not real “ReAmiga” even if some says so…)<\/p>\n

Locator available at:\u00a0http:\/\/locator.reamiga.info\/locator.php?project=A2000<\/a><\/p>\n

Projectpage:\u00a0https:\/\/github.com\/Floppie209\/Amiga2000-remake<\/a>\u00a0 (NOPE this is not mine as it is not my project!)<\/p>\n

First as usual, I put on all passives: (and as usual I put in the electrolytes in the end!)<\/p>\n

\"IMG_1288\"<\/a><\/p>\n

then as we all know by now: the powerled is an extremly important part of troubleshooting the amiga.
\nI actually temporary solder in a led:<\/p>\n

\"IMG_1289\"<\/a><\/p>\n

Now add powerconnector and power on:<\/p>\n

\"IMG_1290\"<\/a><\/p>\n

Now if this is so important? why? as it is bright aleady?\u00a0 well it will get BRIGHTER and that is the key issue! (thats why troubleshootingposts and people say: powerled is on, doesnt say shit! it is the BRIGHTNESS that says stuff)
\nanyway lets go on. next part is to get the RESET to work:<\/p>\n

so I add U805 (LM339), C814, C813 (22uF Capacitors), U607 (74LS08), U303 (74F08)<\/p>\n

and XU1 needs to be here aswell.<\/p>\n

\"IMG_1291\"<\/a><\/p>\n

Now we have a working Reset.<\/p>\n

Next part is to get a sync from the videooutput:<\/p>\n

Install the 23Pin DSUB for Videoout, 28MHz oscillator, Gary and Agnus.<\/p>\n

\"IMG_1292\"<\/a> \"IMG_1293\"<\/a> \"IMG_1294\"<\/a><\/p>\n

here you can see my monitor gives a VGA splash. (not all monitors does some just give a dark grey screen) and you can also see my oscilloscope shows a H-Sync signal.<\/p>\n

now to get the machine to start DiagROM (I always build using it)<\/p>\n

Add ODD CIA (U300)<\/p>\n

\"IMG_1295\"<\/a><\/p>\n

also add U302 (74LS32), U500 (With DiagROM) amd the CPU:<\/p>\n

\"IMG_1296\"<\/a><\/p>\n

If you poweron now.\u00a0 after 1-2 seconds the powerled should flash! (YOU SEE!? NOW you notice why it is important! code runs and can talk to the CIA etc)<\/p>\n

Now lets add stuff so DiagROM can putput data on serialport:<\/p>\n

Add PAULA, U900 (74LS00), U103, U105 (72F245), U104, U106 (72LS373)
\nU304 (1488), Seriaport connector.<\/p>\n

Now DiagROM will output serial data:<\/p>\n

\"IMG_1297\"<\/a><\/p>\n

Now for Chipmem:<\/p>\n

Add U540, U541 (74F244) and chipmem chips (I recomend sockets for memchips)<\/p>\n

\"IMG_1298\"<\/a><\/p>\n

Also make sure you have the jumper correct:<\/p>\n

J101 set to 1-2 for 512K chip and 2-3 to 1MB chip. REMEMBER that J500 must be also set correctmeaning if this is set to 1-2 for512K chip, close J500, if set to 1MB, J500 must be NOT-CLOSED!<\/p>\n

So here is a list of jumpersettings: (1MB Chip, PAL)
\nJ101 – 2-3
\nJ500 – OPEN
\nJ301 – OPEN (no DF1)
\nJ300 – 1-2 (IF you are using ATX PSU set to 2-3)
\nJ200 – 2-3
\nJ900 – CLOSED
\nJ102 – OPEN<\/p>\n

Anyway memory installed:
\n\"IMG_1299\"<\/a><\/p>\n

Time to get a picture:<\/p>\n

add CN206 (Yellow RCA) (for Black\/White composite out)
\nU205, U206 (74HCT244)
\nDenise
\nVideot (text facing into board)<\/p>\n

Now you should have video output.<\/p>\n

\"IMG_1300\"<\/a><\/p>\n

to be able to control the machine add Gameports, Keyboardconnector, U305 (1489) (to get serial in to work) and U202 (72LS157)<\/p>\n

here I have been bad and forgot to take photos..\u00a0 sorry for that.<\/p>\n

now get floppy up:
\nAdd EVEN CIA (U301), U108 (74LS74), U203 (74LS38), Floppy connector, 23Pin DSub for external floppy<\/p>\n

also add Parallelport.<\/p>\n

time for audio:
\nU204 (LF347), C243, C233 (22uF)<\/p>\n

now time to get IRQ to work:
\nU802 (74LS138), U803 (74LS08). U704 (74LS148)<\/p>\n

<at this point kickstart should work><\/p>\n

time to get zorroslots up:
\nU600-U605 (74LS245)
\nU606 (74LS32)
\nBuster
\nand add Zorroslots.<\/p>\n

the slots I got had too long pins so I had to trim them:<\/p>\n

\"IMG_1301\"<\/a><\/p>\n

So I simply put a solderblob on each end of the connector to make it aligned, trim the pins and THEN solder on the rest:
\n\"IMG_1302\"<\/a><\/p>\n

So do this for all connectors:<\/p>\n

\"IMG_1303\"<\/a><\/p>\n

Just add U107 (74F04) and videoslot connector.<\/p>\n

and finally U801 (RTC), Y800 (32768Hz) and VC800<\/p>\n

someday I will do a post how to trim the cap for RTC on Amigas. some other day. generally around 22pF is a “ok” value for the trim-cap..<\/p>\n

Put on all electrolytes etc. all the rest.. and all done!<\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

This is a guide how to build the Amiga 2000 Replica. (not not real “ReAmiga” even if some says so…)…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1029","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/wordpress.hertell.nu\/index.php?rest_route=\/wp\/v2\/posts\/1029","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.hertell.nu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wordpress.hertell.nu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.hertell.nu\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.hertell.nu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1029"}],"version-history":[{"count":6,"href":"https:\/\/wordpress.hertell.nu\/index.php?rest_route=\/wp\/v2\/posts\/1029\/revisions"}],"predecessor-version":[{"id":1526,"href":"https:\/\/wordpress.hertell.nu\/index.php?rest_route=\/wp\/v2\/posts\/1029\/revisions\/1526"}],"wp:attachment":[{"href":"https:\/\/wordpress.hertell.nu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1029"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wordpress.hertell.nu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1029"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.hertell.nu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1029"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}