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Everything posted by AwkwardPotato

  1. There was an article I saw once in (I think) 99er for an alternative keyboard for the 99/4 that used the same 25-pin connector.
  2. Pretty sure it's normal; my PHP1250 does that too.
  3. Good to know! I'll try that out once I get an Editor/Assembler cartridge. BTW, I just thought I'd mention it here in case it hasn't been mentioned before, but the piece of foam/rubber inside the Flex Cable foot's shielding can apparently corrode the underside of the board right around the 74LS245. On mine a fair bit of the solder mask was eaten away and the traces had some "green fuzz" on them.
  4. I've tried every baud rate allowed by MagicFM, and I'm using it with a PC with a real serial port. EDIT: I messed with the settings a bit and now instead of printing only gibberish the TI now prints "Successful", although it's before the program is completely transferred. EDIT 2: Turns out that using a max of 2400 baud in HyperTerm solves the issue. I'll definitely be looking into the HDX mod soon, though. Thanks for the help!
  5. Correction: The host computer isn't repeatedly sending the first packet, it's receiving a line from the TI that says "TIFILES" along with the destination file name. For what it's worth, I noticed that the CTS and DSR lines are always active, no matter what.
  6. Just tried qodem, seems to have the same issue too. After further investigation, it's just repeatedly trying to send the same first packet (the part with the TIFILES header) until MagicFM aborts the process after too many retries. I'm starting to wonder if it's a problem with the card as I've now tried multiple different terminal emulators across 2 computers. If there is a problem with the card, how should I test/diagnose it?
  7. Update: I transferred MagicFM to disk via CS1er and have the TI communicating (almost) successfully with a PC running TeraTerm. The text shown on the TI screen is echoed on the the PC, however, when MagicFM instructs to start the download on the remote computer, I start the transfer with XModem, and TeraTerm hangs after sending the first packet. Not sure where to go from here.
  8. I should also mention that there's no activity on the TIImageTool serial bridge window, so I'm assuming the problem is between it and MAME/it and the USB-Serial adapter.
  9. - arcadeshopper: I've been using 720k 3.5" disks (found out the problems with using HD disks the hard way ) - Casey: Thanks for the tip!
  10. I got a straight (not null modem) DB-9 to DB-25 cable, and I'm using it in conjunction with a USB-Serial adapter connected to a Mac to transfer files. With MESS + TIImageTool, I just get 255 at the top of the screen for both the emulated TI and the real TI when I try to transfer MagicFM. Not sure if it's the RS-232 card, the cables, how I have MESS set up, etc. For what it's worth, here's what I'm using in XB on the real TI to set up the connection (emulated TI is the same, but SAVE instead of OLD). OPEN #1: "RS232.BA=1200" OLD RS232 Here's what I'm using to start MESS: mame64 ti99_4a -cart exbasic -ioport peb -ioport:peb:slot2 32kmem -ioport:peb:slot7 tirs232 -ioport:peb:slot8 tifdc -flop1 disks/mfm.dsk -serl1 socket.localhost:10000
  11. Now that I have a working disk controller, I've tried transferring some games (from the Modules on Disk archive) over via a Win98 PC that (supposedly) supports single density. I've tried both Omniflop and TI99-PC, however the disks created by both programs won't autoload in XB. The disk images do autoload in V9T9, though. Additionally, if I OLD the LOAD program and run it, the menu for the disk appears, but selecting any of the options causes the TI to reboot. I am, however, able to successfully catalog the disks with Disk Manager (I did notice that LOAD isn't marked with a Y in the P column, not sure if this is significant or not). What are some things I should look out for that might be causing this issue? Thanks!
  12. Finally got around to working on the Disk Controller Card again: I replaced the 74LS259, 'LS244's, and 'LS245's. Now, when I try to OPEN #1:"DSK1.X" in TI Basic, I get I/O ERROR 06, regardless of if a disk is in the drive or not. When I try to format a disk in Disk Manager, regardless of name, track number, etc. it immediately stops and says SCREEN IS COMPLETE after I select Y/N for 40 tracks.
  13. - pcoderdude14: I'll try that out when I get the chance. - Opry99er Yep, every single disk command returns that error, whether in TI Basic or Disk Manager. The card is in Slot 8.
  14. The 74LS259 still hasn't arrived, however, while waiting, is there anything else that should happen during the normal TI startup sequence that I should check for on the card, in order to determine if there are other faults elsewhere, since even when the drive is selected properly it refuses to work?
  15. All the square-slider TI keyboards were either manufactured by Hi-Tek or Stackpole (who cloned their design from Hi-Tek), with Hi-Tek always using a white/grey slider, and Stackpole usually using a green slider. However, early Stackpole keyboards used yellow sliders, as can be seen with the keyboard of the original Atari 800: What is the date of manufacture for that 4A?
  16. The replacement 74LS259 hasn't arrived yet, however I will post an update when it does.
  17. Pins 10 and 11 did go active when selected. I finally got a bit of time to work on the TI, and started messing with the card. I replaced the 74LS259 with a socket, and hardwired Pin 9 to +5V. I also lifted Pin 32 of the FD1771, and hardwired Pin 32 of the socket to +5V. This caused the Drive Select 1 to always be active. When powering up the PEB, the light comes on, and when powering up the console the head in the drive knocks several times. However, when attempting to access the drive in either Disk Manager or TI Basic, it still returns error 00.
  18. The keyboard on that 4A is one of the Mitsumi types, however it has an interesting set of keycaps, close to that of the C64: Most of the Mitsumi keyboards I've seen on the 4A have a style close to that of a 4A with the Stackpole keyboard. Weird.
  19. Is there any information out there on the Geneve's ASIC? (documentation, datasheets, etc.) I assumed there wouldn't be very much considering that it wasn't a very popular system, but I can't really find anything at all.
  20. Here's a list of capacitors just in case: Motherboard: 5x 22uf 25v 3x 100uf 25v 1x 10uf 25v Power Supply: 1x 4.7uf 50v 1x 470uf 12v 2x 47uf 16v 1x 1000uf 25v 1x 3300uf 35v One thing I'd like to mention is that these may just be the values for my particular revision of the PSU and/or motherboard. I'd also imagine that the challenge as far as recapping the TI-99 goes would be finding axial capacitors instead of radial.
  21. I'm not exactly an expert as far as caps go, however from personal experience, I've never run into any cap-related symptoms with any of my TI gear. The only machines of mine where caps seem to be an issue are 68k Mac's, Amiga's, Atari ST's, etc. from the late 80's onwards.
  22. Well, I did some probing on the controller card, and I found this: - Disk Select 1 comes from an 8-Bit Addressable Latch (74LS259, U23) - The Clear, Enable, Data, and Address lines to the 74LS259 seem to work, but Disk Select 1 (Pin 9) never goes up Does this mean it's likely U23 that's bad, or is there probably something else going on?
  23. I've tested the drive by shorting some of the pins to ground -- namely the Motor Enable, Drive Select, and Step pins, all of which work. I'm assuming this means that there is an issue with the controller card instead.
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