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Diffstat (limited to 'content/hardware')
| -rw-r--r-- | content/hardware/_index.md | 8 | ||||
| -rw-r--r-- | content/hardware/book8088-status-todos.md | 21 | ||||
| -rw-r--r-- | content/hardware/book8088.md | 18 | ||||
| -rw-r--r-- | content/hardware/imc-2001-chargen40.md | 90 | ||||
| -rw-r--r-- | content/hardware/imc-2001-documentation.md | 18 | ||||
| -rw-r--r-- | content/hardware/imc-2001-firmware.md | 185 | ||||
| -rw-r--r-- | content/hardware/imc-2001-images.md | 20 | ||||
| -rw-r--r-- | content/hardware/imc-2001-keyboard.md | 58 | ||||
| -rw-r--r-- | content/hardware/imc-2001-links.md | 19 | ||||
| -rw-r--r-- | content/hardware/imc-2001-power.md | 26 | ||||
| -rw-r--r-- | content/hardware/imc-2001-status-todos.md | 133 | ||||
| -rw-r--r-- | content/hardware/imc-2001.md | 18 |
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diff --git a/content/hardware/_index.md b/content/hardware/_index.md new file mode 100644 index 0000000..ef4be4e --- /dev/null +++ b/content/hardware/_index.md @@ -0,0 +1,8 @@ ++++ +title = "Hardware" ++++ + +A (not so curated) list of "old" hardware I own: + +- [IMC-2001](/hardware/imc-2001): Taiwanese Apple \]\[ / CP/M clone +- [Book8088](/hardware/book8088): Modern 8088 XT-style laptop PC diff --git a/content/hardware/book8088-status-todos.md b/content/hardware/book8088-status-todos.md new file mode 100644 index 0000000..b02ba5e --- /dev/null +++ b/content/hardware/book8088-status-todos.md @@ -0,0 +1,21 @@ ++++ +title = "Book8088 Status and Todo List" ++++ + +# Todos + +Trying to fix several issues: + +- Minix 2.0.4: has some weird issues around IRQ handling. It gets stuck + in readclock (I suspect after every IRQ, because it happens also when + using sleep - which needs a hardware clock interrupt - and when printing + to serial). The CF uses _no_ interrupt, this explains why Minix 2 is + booting at all. + +# things known to work + +- DOS 6.22 with mTCP network stack and a NE2000 Kinston card +- Mini 1.7 boots and runs just fine +- Booting XT-IDE serially with DOS image +- Booting Minix 2.0 over serial using the Linux version of serdrive + from XT-IDE diff --git a/content/hardware/book8088.md b/content/hardware/book8088.md new file mode 100644 index 0000000..ee06868 --- /dev/null +++ b/content/hardware/book8088.md @@ -0,0 +1,18 @@ ++++ +title = "Book 8088" ++++ + +{{< figure src="/images/hardware/book8088/book8088.jpg" alt="Book8088" >}} + +This is a modern clone of a IBM PC (XT), with a NEC V20 CPU, compact flash, +VGA graphics, serial and parallel connector and a USB connector (which mainly +serves as mass storage device). It has 640k of RAM (yes exactly 640k). It runs +in 4 or 8 MHz speed (turbo mode). You can also connect 8-bit ISA-cards over +an ISA-bus extender with 3 slots (though this renders the laptop much less +portable). + +It runs the [8088 BIOS](https://github.com/skiselev/8088_bios) not the Chinese +pirated one. This one also includes the [XT-IDE](https://www.xtideuniversalbios.org/) +disk BIOS for the compact flash or serial disk drive. + +- [Status and Todos](/hardware/book8088-status-todos) diff --git a/content/hardware/imc-2001-chargen40.md b/content/hardware/imc-2001-chargen40.md new file mode 100644 index 0000000..84bf54a --- /dev/null +++ b/content/hardware/imc-2001-chargen40.md @@ -0,0 +1,90 @@ ++++ +title = "IMC-2001 40 character mode" ++++ + +{{< figure src="/images/hardware/imc-2001/chargen.png" alt="character in the 40-char ROM" >}} + +*A4-A6* on the schematics is the character ROM in a chip labelled +UMC UM2316-J127 8432, it is Intel 2716 EPROM compatible chip it seems. + +It can be read with the TL866 and returns the following 2K dump: + +[chargen.rom](/hardware/imc-2001/chargen.rom): Chargen 40-column ROM + +The official ROM +[3410036.BIN](http://www.applelogic.org/APPLEASICs.html) on +http://www.applelogic.org/APPLEASICs.html doesn't match +at all. The arangement of the characters is different and there are +lowercase characters in the clone ROM. + +I wrote a small program to show the contents of chargen.rom: + +``` +#!/usr/bin/tcc -run -Werror -DSDL_DISABLE_IMMINTRIN_H -I/usr/include/SDL2 -lSDL2 + +#include <stdio.h> +#include <stdlib.h> +#include <SDL.h> + +int main( int argc, char *argv[] ) +{ + FILE *f = fopen( "./chargen.rom", "r" ); + char *buf = malloc( 2 * 1024 ); + fread( buf, 2 * 1024, 1, f ); + + SDL_Renderer *renderer; + SDL_Window *window; + + SDL_Init( SDL_INIT_VIDEO ); + SDL_CreateWindowAndRenderer( 300, 200, 0, &window, &renderer ); + SDL_SetRenderDrawColor( renderer, 0, 0, 0, 0 ); + SDL_RenderClear( renderer ); + SDL_SetRenderDrawColor(renderer, 0xFF, 0xB0, 0, 255 ); + + int x = 0; + int y = 0; + for( int c = 0; c < 2 * 1024; c++ ) { + int v = buf[c] & 0x00ff; + for( int b = 0; b < 8; b++ ) { + if( v & 0x01 ) { + SDL_RenderDrawPoint( renderer, x, y ); + } + v >>= 1; + x++; + } + x -= 8; + y += 1; + if( ( (c+1) % 128 ) == 0 ) { + x += 10; + y = 0; + } + } + + SDL_RenderPresent( renderer ); + + int done = 0; + while( !done ) { + SDL_Event event; + SDL_PollEvent( &event ); + switch( event.type ) { + case SDL_QUIT: + case SDL_KEYDOWN: + done = 1; + break; + } + } + + + SDL_DestroyRenderer( renderer ); + SDL_DestroyWindow( window ); + SDL_Quit( ); + + free( buf ); + fclose( f ); + return 0; +} +``` + +And indeed I get: + +{{< figure src="/images/hardware/imc-2001/chargen.png" alt="character in the 40-char ROM" >}} diff --git a/content/hardware/imc-2001-documentation.md b/content/hardware/imc-2001-documentation.md new file mode 100644 index 0000000..20fce81 --- /dev/null +++ b/content/hardware/imc-2001-documentation.md @@ -0,0 +1,18 @@ ++++ +title = "IMC-2001 Documentation" ++++ + +# Operation Manual + +"Operation Manual for IMC-2001, version 2.01": + +{{< figure src="/images/hardware/imc-2001/manual_frontpage.jpg" alt="manual frontpage" >}} + +[The complete scanned manual](/hardware/imc-2001/manual_imc_2001_2.01.pdf) +(also on archive.org, see [https://archive.org/details/manual_imc_2001_2.01](https://archive.org/details/manual_imc_2001_2.01)) + +# Super Serial Card + +I got a super serial card from Ebay, the documentation of it can be +found here [https://archive.org/details/Apple_II_Super_Serial_Card_1981_Apple](https://archive.org/details/Apple_II_Super_Serial_Card_1981_Apple). + diff --git a/content/hardware/imc-2001-firmware.md b/content/hardware/imc-2001-firmware.md new file mode 100644 index 0000000..8e4aabc --- /dev/null +++ b/content/hardware/imc-2001-firmware.md @@ -0,0 +1,185 @@ ++++ +title = "IMC-2001 Firmware" ++++ + +{{< figure src="/images/hardware/imc-2001/romboard.jpg" alt="IMC-2001 ROM card" >}} + +# Intro + +The ROM consists of two ROM chips. The bigger chip labelled "ROM1" was +broken (it got really hot) and could not be read (it returned all zeroes). +It has no markings on it, so one can only guess it is something AT28C256 +compatible. + +The ROMs sit in the special "slot 0". The board has two other +unused ROM sockets and an arrow pointing to an additional ROM socket on +the motherboard itself. + +On the schematics the slot is not labelled "slot 0" but "ROM" and this +gives away it's special purpose for the machine. + +# ROM 2 + +ROM 2 (sticker with hand-written red 2 on top) is a Mitsubishi M5L2732K, +32k-bit, 4k-ROM, seems very ok during operation (the carvings say +"M5L2732K, 83080L, JAPAN"). + +## lower-case patch + +Comparing ROM2 to the standard Apple autostart ROM +(https://6502disassembly.com/a2-rom/AutoF8ROM.html) we see only one difference at: + +``` +FD80 (F800+580) + +AutoF8ROM +00000580 90 02 29 df 9d 00 02 c9 8d d0 b2 20 9c fc a9 8d |..)........ ....| +monitor.rom: +00000580 90 02 ea ea 9d 00 02 c9 8d d0 b2 20 9c fc a9 8d |........... ....| +``` + +``` +fd80: 90 02 bcc ADDINP +fd82: 29 df and #$df ;shift to upper case +fd84: 9d 00 02 ADDINP sta IN,x +fd87: c9 8d cmp #$8d +fd89: d0 b2 bne NOTCR +fd8b: 20 9c fc CROUT1 jsr CLREOL +fd8e: a9 8d CROUT lda #$8d +fd90: d0 5b bne COUT +``` + +*EA EA* are 2 nops where the *and #$df* is. This seems to do away with +uppercasing the byte coming from the keyboard, so that lower-case character +work. + +# ROM 1 + +ROM 1 is hard to guess, what it originally contained (as mine got fried). + +# addressing mode + +I put back the original Autostart ROM, the addressing on the PCB is a little +bit weird. As the monitor was working I could write a test ROM with + +``` +#!/usr/bin/tcc -run -Werror + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +int main( int argc, char *argv[] ) +{ + FILE *f = fopen( "./pattern.rom", "w" ); + char *buf = malloc( 1024 ); + for( int i = 0; i < 32; i++ ) { + memset( buf, i, 1024 ); + fwrite( buf, 1024, 1, f ); + } + fclose( f ); + free( buf ); + return 0; +} +``` + +and get the following pattern in the monitor: + +``` +D000 1C +D400 1D +D800 1E +DC00 1F +E000 18 +E400 19 +E800 1A +EC00 1B +``` + +So the replacement AT28C256 is arranged as follows: + +``` +0x6000 18 must contain the second 4k of the apple rom starting with e000 (24k) +0x7000 1c must contain the first 4k of the apple rom d000 +``` + +So I ended up doing this: + +``` +dd if=/dev/zero of=zero1 bs=1 count=24576 +dd if=Applesoft of=apple1 bs=1 skip=4096 count=4096 +dd if=Applesoft of=apple2 bs=1 count=4096 +cat zero1 apple1 apple2 > newrom1.rom +``` + +## Unkown difference + +When I watched the series on the Apple clone from Adrian's Digital Basement +(he has a nice 3 part mini-series on the fixing of an Apple clone of unknown +origin) I noticed the following difference: + +ROMS he published 'Apple\ II\ Clone\ ROM\ E0\ 300854cc.bin' which +has one single difference in the E000 ROM: + +``` + ; Convert FAC to integer. Must be -32767 <= FAC <= 32767. +e10c: a5 9d AYINT lda FAC ;exponent of value in FAC +e10e: c9 90 cmp #$90 ;abs(value) < 32768? +e110: 90 09 bcc MI2 ;yes, okay for integer +e112: a9 fe lda #<NEG32768 ;no; next few lines are supposed +e114: a0 e0 ldy #>NEG32768 ;to allow -32768 ($8000), but do not! +e116: 20 b2 eb jsr FCOMP ;because compared to -32768.00049 + ; <<< BUG: A=-32768.00049:A%=A is accepted, but PRINT A,A% shows that A=- + ; 32768.0005 (ok), A%=32767 (wrong!) >>> +``` + +instead of *a0e0* it has *a0e5* + +``` + ; <<< meant to be -32768, which would be 9080000000 >>> + ; <<< 1 byte short, so picks up $20 from next instruction >>> +e0fe: 90 80 00 00 NEG32768 .bulk $90,$80,$00,$00 ;-32768.00049 in floating point +``` + +maybe the variable got moved to *e5fe* for some reasons? hard to tell, especially +as the other ROMs have no differences. I kept mine on the original autostart ROM. + +## PIN Layout + +Found on https://forum.classic-computing.de/forum/index.php?thread/11666-apple-clon-gtac-fragen/&postID=401752#post457130 + +``` +Slot Rom1 Rom2 Slot Rom1 Rom2 + +Pin Pin + +26 12 14-12 25 28 24 +27 20,18 24 +28 22 23 +29 22 +30 21 +31 20 +32 19 +33 18 +34 17 +35 16 +36 15 +37 14 2 +38 13 23 +39 12 20 +40 11 24 +41 10 25 23 +42 9 3 1 +43 8 4 2 +44 7 5 3 +45 6 6 4 +46 5 7 5 +47 4 8 6 +48 3 9 7 +49 2 PIN10 8 +50 1 +``` + +## Links + +* https://forum.classic-computing.de/forum/index.php?thread/11666-apple-clon-gtac-fragen/&postID=401752#post457130 diff --git a/content/hardware/imc-2001-images.md b/content/hardware/imc-2001-images.md new file mode 100644 index 0000000..f7d3bdb --- /dev/null +++ b/content/hardware/imc-2001-images.md @@ -0,0 +1,20 @@ ++++ +title = "IMC-2001 Images" ++++ + +From the outside: + +{{< figure src="/images/hardware/imc-2001/computer_full.jpg" alt="IMC-2001" >}} + +Booting into Apple \]\[ CP/M 56k: + +{{< figure src="/images/hardware/imc-2001/cpm_40chars.jpg" alt="IMC-2001" >}} + +The motherboard and floppy drives: + +{{< figure src="/images/hardware/imc-2001/motherboard_internal.jpg" alt="IMC-2001" >}} + +The motherboard seems to be a CTAG-2 Taiwanese motherboard, so pretty standard. + +The floppy drives are standard TEAC-55A-U-00, with the short cable without the ground +pins between data lines presumably. diff --git a/content/hardware/imc-2001-keyboard.md b/content/hardware/imc-2001-keyboard.md new file mode 100644 index 0000000..aaeea43 --- /dev/null +++ b/content/hardware/imc-2001-keyboard.md @@ -0,0 +1,58 @@ ++++ +title = "IMC-2001 keyboard" ++++ + +connector to machine (sort of a rubber version of a DB-9): + +The connector on the computer side has a 9-pin DSUB connector male: + +``` + +----------- white INTR + | +--------- black GND + | | +------- green DATA + | | | +----- blue RESET + | | | | +--- Yellow CLOCK +------------- +\ O O O O O / + \ O O O O / + --------- + | | | +---- red 5V + | | +------ n.c. + | +-------- n.c. + +---------- n.c. +``` + +On the keyboard PCB there is a strange white connector with the following layout: + +``` + +------------- white INTR (active low, after last clock tick) + | +----------- black GND + | | +--------- blue RESET (active low) + | | | +------- green DATA + | | | | +----- yellow CLOCK + | | | | | +--- red +5V + +-----------+ + |o o o o o o| + +-----------+ + | | +``` + +Keyboard layout: + +{{< figure src="/images/hardware/imc-2001/keyboard_front.jpg" alt="keyboard layout" >}} + +Keyboard has a 8039 CPU inside and a 2K EPROM: + +{{< figure src="/images/hardware/imc-2001/keyboard_pcb_controller_prom.jpg" alt="PCB and controller" >}} + +On the oscilloscope: + +{{< figure src="/images/hardware/imc-2001/oscilloscope_serial_keyboard.jpg" alt="serial keyboard signal" >}} + +The protocol is basically ASCII over 19200 baud serial, with an interesting end signal which +IMHO triggers a latch on the motherboard or so (INTR white above). + +Broken keyboard cable (the black pins are just connectors added by me to test connectivity, +both connector are female per default): + +{{< figure src="/images/hardware/imc-2001/keyboard_cable.jpg" alt="PCB and controller" >}} diff --git a/content/hardware/imc-2001-links.md b/content/hardware/imc-2001-links.md new file mode 100644 index 0000000..2d8a421 --- /dev/null +++ b/content/hardware/imc-2001-links.md @@ -0,0 +1,19 @@ ++++ +title = "IMC-2001 Links" ++++ + +## Other IMC-2001 + +* [Mention of the IMC-2001](http://www.epocalc.net/php/liste_models.php?texte=&look=All+fields&yearmax=2018&nocomp=pc&cat=Apple+2+clone): + mentions it on the list of Apple clones +* [Youtube video of similar machine](https://www.youtube.com/watch?v=c7crlJg80Zg): + "APPLE II CLONE + CP/M ------- IMC 2001 made in taiwan.--------", Retro Computacion Argentina Jorge E. Nuviola + +## Other Similar Clones + +* West PC 800: + - Pietro Filiberi: https://www.youtube.com/@dustylife/videos + - Retro Erik: https://www.youtube.com/watch?v=Kop7mHEmJyM +* https://github.com/eyalabraham/apple2 or + https://github.com/pfiliberti/gtac-appleclone +* http://john.ccac.rwth-aachen.de:8000/patrick/MEWA48.htm diff --git a/content/hardware/imc-2001-power.md b/content/hardware/imc-2001-power.md new file mode 100644 index 0000000..ee8e3a1 --- /dev/null +++ b/content/hardware/imc-2001-power.md @@ -0,0 +1,26 @@ ++++ +title = "IMC-2001 Power and PSU" ++++ + +Power connector on the motherboard: + +``` ++-------------+ +| O O O O O O | ++-------------| + | | | | | +--- GND black + | | | | +----- +12V red + | | | +------- -5V blue + | | +--------- -12V brown + | +----------- +5V white + +------------- +5V white +``` + +Old PSU: + +{{< figure src="/images/hardware/imc-2001/old_psu.jpg" alt="New PSU" >}} + +New PSU replacing the old crusty one (this is a standard replacement PSU for +Apple \]\[ from [Reactive Micro](https://wiki.reactivemicro.com/Universal_PSU_Kit)): + +{{< figure src="/images/hardware/imc-2001/new_psu.jpg" alt="New PSU" >}} diff --git a/content/hardware/imc-2001-status-todos.md b/content/hardware/imc-2001-status-todos.md new file mode 100644 index 0000000..9ba7995 --- /dev/null +++ b/content/hardware/imc-2001-status-todos.md @@ -0,0 +1,133 @@ ++++ +title = "IMC-2001 Status and Todo List" ++++ + +# Todos + +Trying to fix several issues: + +- CPM65 works on the machine in 40-character mode (hacked), the + Videx card is the next goal. The 40-character mode still is quite + unreliable and crashes the machine, the screen TTY driver is still + to be done for apple2. +- the 5V rail is on 4.5V now, causing issues with the keyboard (the + length of the cable) and with the paddles. Not clear, whether this + is the PSU (which is also showing 4.7V without load) or something + on the motherboard. There are two +5V lines on the original PSU and + only one on the replacement PSU, maybe that's a problem? +- the keyboard beeps and issues '=' and '/' characters when connected + to a longer serial cable, no problems when connecting the botched + wire from the old connector on the keyboard PCB directly to the + computer. Some shielding or capacitance issue? It also appeared + only after playing with the paddle connectors. +- the new paddle connector with DIN-5 connectors works somewhat with + paddle 0, though the nob is not totally up when on 255. This indicates + again a capacitance issue, probably with the cable itself? +- two new teac drives turned out to have the very wrong connector for + an Apple \]\[ disk controller, some adapted has to be designed and + a PCB has to be printed. +- strange issues with floppy images not working in LinApple or also + not on the real computer, always bailing out in the monitor in strange + locations. Used Fluxengine and ADTPro to get images, they are identical. + Checked the RAM of the machine, no errors. Must investigate if boot + addresses are the issue (48k floppy masters not working on 64 or similar + issues) +- HGR shows a line on row 0 only partially. This could be an adjustment issue + of the CRT image or also bad RAM. +- the CRT shows some flickering and diagonal effects. Testing on an old TV + shows the same issue (so I suspect it's some grounding/shielding issue + with the new PSU). +- the CRT is producing some flickering when turning the brightness nob, + this should be fixable with some deoxit. +- the second floppy drive (the more used one) now sees floppies always as + "write protected". Diagnostic tests show alignment issues of the drive, this + could be true, or the clone always had a different alignment than a default + Apple 2 drive? +- the paddle wire is self-made on paddle 1 and quit a mess. Doing a rewire + with DIN-5 connectors which then lead to a 9-pin DSUB-Apple ][ standard + joystick connector, which will go to the 16-pin DIP socket on the motherboard. + The original joystick connector has a completely weird layout and is not usable + (it has no Apple 2 layout) +- really bad design to connect DIP 2x8 cables of the joystick and the paddles + directly on the motherboard, you pull the cable a little bit too much and + you tar out half of the motherboard. +- possibly much more + +# Fixed Issues + +- ~~the paddle and the joystick connectors miss some legs for putting them into + the sockets on the motherboard~~. No essential pins are missing, will + rework this anyway as a 8x2 DIP to 9-DSUB, from there to an adapter + where you can connect 2 DIN-5 cables, needs rewiring of both paddles. +- ~~paddle 0 seems to be a little bit shacky (the button works unreliably)~~. + DeOxit in the button helped. Works much better now. +- ~~the lever moving the contacts between 40-character and 80-character + mode for the CRT output is corroded, doesn't always make contact + and produces a flickering image~~. The box is heavily sealed and there + is no easy way to fix it. Using an audio switch box for switching modes now + (the cables are standard audio-like cinch connectors). +- ~~the floppy drives read floppies (both) but they don't write to floppies + (when copying in CP/M or creating a file), they work when formatting + a drive on CP/M though. ~~Could be a side-effect of the PSU not working properly.~~ + The PSU has been replaced, the voltages look ok, so I rule out the PSU. + Could be some missing code in the Apple ROM (but that would be weird to + call 6502 firmware code from the Z80 CPU). It could also be the write + current being to low for writting (but why does formatting a drive work then?!)~~ + So, yes. DOS 3.3 and CP/M both use some ROM routines from ROM1 to write to disk. + Works now. +- ~~floppies written read/written with Fluxengine don't really work either + on the real hardware or the emulator. Suspecting a encoding/decoding issue.~~ + Updating Fluxengine solved the issue, also choosing 96dpi 5 1/4" for the real + floppy drive. :-) +- ~~the keyboard reset line cannot be taken to ground on the keyboard, works + with shrtening ground and reset though just fine. Must be a bug on the + ICs of the keyboard controller or a broken trace.~~ Fixed with a botch + to bridge the broken ribbon cable between keyboard matrix and the PCB with + the controller logic. +- ~~ROM 1 with BASIC is broken (and gets really hot). This explains + the booting issues.. (will be tricky to get a replacement). The + board layout doesn't fit to the original ROM sizes too..~~ + Got an AT28C256, no more frying of chips, Apple Basic prompt appears, + tested some commands and it seems fine. The 32k ROM has to be filled in + starting from 0x6000 with #E000-$EFFF and from $7000 with $D000-$DFFF. + If this ROM is ok we will see. +- Reseated and deoxied all ICs, some of them were quite corroded, at + least 3 more turned out to be bad. ~~Sadly it didn't have an effect on + ROM 1 not getting hot (must be something else).~~ The new replacement + ROM works fine and doesn't get hot. So I actually blame it on the ROM + itself causing the other ICs to fry and not vice-versa. +- ~~power switch made some hissing noises, it was not the switch, now + the original power is dead (and some transformers are humming). Ordered + a Apple 2 replacement PSU, waiting for it..~~ + The new replacement power supply works like a charm, also replaced + the power switch, the old one was too unreliable. +- ~~sometimes I get into the monitor~~ +- ~~lower-nibble bit 3 of the key + being pressed is missing, unclear where it is lost, I suspect a + bad register on the motherboard holding the current ASCII value of + the key pressed or something similar~~. Replaced a bad 74LS257N, + works now just fine. + +# Not fixed issues: + +- ~~The 220V fan no longer works.~~ + I just disconected it, I don't think, it really helps to cool the system. + +# Known things to work: + +- The keyboard works electronically (8039 MCS-48 like CPU with a 2K EPROM), + has a new serial cable now and is fully functional +- the Rockwell R6502 CPU has a phase 0 clock and seems to go through + address lines and output data (another strong indicator is the 'Apple \]\[' + sign on the monitor when switching on which indicates 6502, 40-character + ROM, video circuit seems to be just fine). +- Monitor is working just fine (which is sort of amazing for such an old + CRT monitor). +- I can boot from a Apple \]\[ CP/M 56k floppy and I get a prompt, now + as the keyboard works and the CP/M on the 80-character card I can also + assume the Z80 is working just fine. +- the 80-columns card (a Videx Videoterm or rather a clone of it) works just fine. +- the highres graphic mode works just fine, I can run "Peter Anvin Chess" and play it. +- Applesoft BASIC works fine +- the new Super Serial Card II I got works fine, though it looses characters + (without parity and adding some delay in minicom). Definitely usable. diff --git a/content/hardware/imc-2001.md b/content/hardware/imc-2001.md new file mode 100644 index 0000000..608e455 --- /dev/null +++ b/content/hardware/imc-2001.md @@ -0,0 +1,18 @@ ++++ +title = "IMC-2001" ++++ + +{{< figure src="/images/hardware/imc-2001/computer_full.jpg" alt="IMC-2001" >}} + +This is an old Taiwanese Apple \]\[ / CP/M clone. + +- [Status and Todos](/hardware/imc-2001-status-todos) +- [Keyboard](/hardware/imc-2001-keyboard): keyboard connector and protocol +- [Power](/hardware/imc-2001-power): PSU and power +- [Chargen40](/hardware/imc-2001-chargen40): 40-column character mode +- [Firmware](/hardware/imc-2001-firmware): the monitor, Applesoft ROMs +- [Documentation](/hardware/imc-2001-documentation): documentation about the machine + and peripherals +- [Images](/hardware/imc-2001-images) +- [Links](/hardware/imc-2001-links): links to other similar machines + |