#YModem
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breakintoprogram.co.uk
Further to last night's MicroBeast outing, updating the firmware to the latest and greatest. Needs to be sent via YMODEM. Thankfully I wrote a script that does this in Linux.
A bash script running the Linux command sb
October 13, 2026 at 7:12 PM
pineconecomputer.com
DaisyTerm now supports file transfer over XMODEM and YMODEM, since DaisyOS now supports SD cards!
October 13, 2026 at 8:47 PM
lockfarm.bsky.social
Ymodem is somewhat easier to implement than Zmodem.

@ant.org has created a sliding window file transfer utility SLIDE.COM that runs in CP/M and his rather useful BeasTTY browser based terminal program. That gives you drag and drop file transfer in BIOS 1.8+

blowback.github.io/beasTTY/
Beastty
blowback.github.io
October 13, 2026 at 7:45 PM
whitequark.org
implemented XMODEM/YMODEM for #GlasgowInterfaceExplorer : github.com/GlasgowEmbed...
Implement YMODEM protocol and integrate with UART applet by whitequark · Pull Request #1304 · GlasgowEmbedded/glasgow
The two new operations ymodem-send and ymodem-recv allow exchanging batches of files. XMODEM operations for the UART are not implemented at the moment, but the underlying protocol implementation fu...
github.com
September 27, 2026 at 3:32 PM
whitequark.treehouse.systems.ap.brid.gy
implemented XMODEM/YMODEM for #glasgowinterfaceexplorer : https://github.com/GlasgowEmbedded/glasgow/pull/1304
Implement YMODEM protocol and integrate with UART applet by whitequark · Pull Request #1304 · GlasgowEmbedded/glasgow
The two new operations ymodem-send and ymodem-recv allow exchanging batches of files. XMODEM operations for the UART are not implemented at the moment, but the underlying protocol implementation fu...
github.com
September 27, 2026 at 3:32 PM
ansibot.bsky.social
PROTOCOL.ANS, 1991-04-30 from 1st Canadian Shareware Disc (CD-ROM)
Internal Protocols [Cl= CIS Quick B [11= 1k-Xmodem [Kl= Kermit [Gl= G-1K-Xmodem MI= Modem? LY= Ymodem (Batch) [S]= SEAlink [El= YmodEm-g [Tl= Telink [Z1= Zmodem [Xl= Xmodem External Protocols LAI= TrAnslink LI= Lynx [Bl= Bimodem [Pl= MPt (Puma) [D]= TmoDem [Q]= Quickiran [Hl= Hyperdrive L8l= Super8K-MNP [Il= MegalInk ['l= ZIMAX [Jl= Jmodem [*]= S*Zmodem
September 20, 2026 at 7:45 AM
elgringofeo.bsky.social
There's something rewarding about watching a progress bar, I think it comes from downloading in XModem on BBSes back in the day and seeing a file complete without someone on either end interrupting the xfer and having to start fresh. YModem with autoresume was a godsend.
September 7, 2026 at 6:00 PM
psvrh.bsky.social
YMODEM-G for preference.

Error checking is for wimps.
September 6, 2026 at 11:17 PM
virusdave.bsky.social
2400 baud? Sheesh, such embarrassment of riches you young'uns had.

I used a 300 baud modem hand hacked to connect to my c64 via rs232 port <-> user port hardware hack.

Hours spent watching ymodem and eventually zmodem displaying ASCII of files being retrieved.

I could out-type it even!
January 28, 2026 at 1:08 PM
haliphax.hachyderm.io.ap.brid.gy
I say zmodem... there's really no need for the error correction and compression since it's already happening over SSH. I think I actually used xmodem or ymodem-1k with batching on my last go 'round with this stuff.
August 8, 2025 at 7:17 PM
othiym23.bsky.social
upgrading from XMODEM to YMODEM to ZMODEM in an attempt to get better download speeds, after a brief dalliance with Kermit (and using all four to download files onto my Mac that I'd transferred to my account on the school's VAX through the BITNET<->FTP gateway at UIUC)
August 17, 2024 at 6:19 PM
rzack.bsky.social
naw man you gotta rock the Ymodem-G these days
January 4, 2025 at 10:52 PM
kaveros.top
Using XMODEM, YMODEM, or ZMODEM to download files.
October 1, 2024 at 1:42 PM
breakintoprogram.co.uk
Fiddling with my dev environment for the MicroBeast over my lunch hour. Got ymodem working in Linux from the command line at a fair rate now. Need to figure out a way to transfer individual files to the B drive next.
February 26, 2025 at 1:46 PM
breakintoprogram.co.uk
BBC BASIC almost works. At least it doesn't completely bomb out like it did on the actual hardware. I think there is a memory allocation fault here. At least I know how to load and test disk images now in the emulator without using YMODEM.
BBC BASIC running a program 10 PRINT "HELLO "; 20 GOTO 10
February 20, 2025 at 1:05 PM
breakintoprogram.co.uk
On the plus side, I can do all of this from the command line. Though had forgotten how painfully slow YMODEM transfers can be. Maybe I can tweak the packet sizes to improve that.
February 14, 2025 at 9:26 PM
lockfarm.bsky.social
Gah. Complete re-organisation of the MicroBeast BIOS has thrown up a bug somewhere in the YModem/Flash routines. It's not obvious when this was introduced so:

(a) Use BIOS 1.7 with caution and
(b) I've got a lot of debugging to do 😒
May 2, 2026 at 9:55 AM
teraterm.net
TeraTerm Project
@Tera_Term
Tera Term 5.5.1 をリリースしました。

主な変更点
- Kermit, Quick-VAN, YMODEM, ZMODEM 送信時にファイルを複数選択したとき、Tera Term がクラッシュする不具合を修正した。
- SCPファイル転送が低速になった問題を修正した。
github.com/TeraTermProj...
Release Tera Term 5.5.1 · TeraTermProject/teraterm
Tera Term (Ver 5.5.1), TTSSH (Ver 3.5.1) 主な変更点 Kermit, Quick-VAN, YMODEM, ZMODEM 送信時にファイルを複数選択したとき、Tera Term がクラッシュする不具合を修正した。 (issue #9, #942) YMODEM 受信時にキャンセル受信処理が実装されていない問題を修正した。 (issue #786) S...
github.com
November 17, 2025 at 1:50 PM
bsky.perlmint.dev
최소 ymodem은 써야 하려나?
October 17, 2024 at 6:14 AM
siliconundergro.bsky.social
I used Ymodem when I could (and later, Zmodem of course) but the most common protocol when I started BBSing was Xmodem, so I'm a bit more nostalgic for it.
February 19, 2025 at 5:13 PM
theoasisbbs.bsky.social
XCOMM X16 Terminal Brings BBS File Transfers to the Commander X16
#CommanderX16 #XCOMM #VoidstarTech #Xiphod #BBS #RetroComputing #ANSI #PETSCII #YModem #MOS6502

theoasisbbs.com/xcomm-x16-te...
XCOMM X16 Terminal - The Oasis BBS
XCOMM X16 Terminal combines ANSI and PETSCII modes, local file tools, macros, and YModem batch transfers on the Commander X16.
theoasisbbs.com
August 3, 2026 at 1:09 PM
theoasisbbs.bsky.social
XCOMM Dual Terminal Brings Split-Screen Serial Tools to Commander X16
#CommanderX16 #XCOMM #RetroComputing #SerialTerminal #VERA #YModem #8BitComputing

theoasisbbs.com/xcomm-dual-t...
XCOMM dual terminal - The Oasis BBS
XCOMM dual terminal brings split-screen serial activity, a local console, YModem downloads, and flexible fonts to the Commander X16.
theoasisbbs.com
July 20, 2026 at 12:41 PM
theoasisbbs.bsky.social
X16 YModem Transfer on Commander X16 Moves from BASIC Testbed to Fast C Uploads
#CommanderX16 #YModem #Xiphod #RetroComputing #SerialTransfer #RS232 #8BitComputing #CommanderX16Community

theoasisbbs.com/x16-ymodem-t...
X16 YModem Transfer - The Oasis BBS
X16 YModem Transfer follows Xiphod’s Commander X16 project, from BASIC tracing to fast C batch file uploads.
theoasisbbs.com
March 23, 2026 at 1:07 PM
theoasisbbs.bsky.social
X16 YModem Batch Speeds Up TexElec Serial Transfers
#CommanderX16 #RetroComputing #YModem #BBS #Serial #HomebrewComputing #MOS6502 #8bit #TexElec

theoasisbbs.com/x16-ymodem-b...
X16 YModem Batch Speeds Up TexElec Serial Transfers - The Oasis BBS
X16 YModem Batch lands in Xiphod’s demo, showing fast multi-file transfers over the TexElec 16550 serial link. Watch it work.
theoasisbbs.com
February 26, 2026 at 1:23 PM
ansibot.bsky.social
HLP_DOWN.ANS, 1992-03-30 from Internet Access: To the Information Highway (CD-ROM)
H Protocol is method used to transfer. files. There are many differnt protocols. Rialah urnlmails Call Lransfer seurral filex il riu, I afler ammither. Crash rccovcry is whcn a protocol con rcsumc a transfer prcviously abortcd. The protocol you sclect must bc onc uhich your comnunication progran is capable of rumning. Zmodem or Ymodem is yood choices for begimmers. [BI BiModen: This is by far. the best tranfer pratocol of them all. it allous sinultancous bidirectional filc transfers. which ncans you can upload and download at the same tine (at full speed). Chal.liny in sulil NETTEI murle 2m he rume al. Lhr Name Lim Lhal filc transfers arc in progross! This will of coursc impact your throughput a little. You can use Bilist to create large list of uplond and download requests beforc you calla DDS. It has crash recouery, and canCKC veri ify and repair Files as uell. You can abort a file in progress, and skip right to: the next one. (With a registcrcd vcrsion of BiModcn, you may also add norc filcs tol be sent or recived, while Bimoden is still transferingt? Binuden reyuires Chal bulh mudems are Capable uf duiny full- duplex trangmissions. AL12400 bps nodens uill support full- duplex, and U.32 and U. 32b1s modems will also work, but HSTS and Speednodens will xnotx work, bccausc thcy arc only half duplex at high spccd. [2] Zmoden: This is the most commonly used protocol today. It features Crash recouery. and high reliablity. It can transfer cucn under scucrily poor linc conditions when otler. pratocols Tail. Sone Communicaion programs have Zmodem built in, and others use and rxlermal jnilisal driuer sm:h Ax DS2 ur 632, uhirh ymm au aild. IS] Supcr- Zmodcm: This is an intresting protocol. It is onpat ible with nornal Zmoden, and allous you to do seueral things uhile Lransfering filex. TL hax d sin-DnS: xhell Lhal lels yum din dir and other DOS commands, it has scucral built in gamcs such as Tetris that you can play all uhile the transfer is in progress. if bothsides arc ruming Super Zmodem you Con usc a split scrcen chat node which is very sinular to: the one in Binoden. CY] Ymoden-Batch: This protocol is a variation of Xmodem- 1k which hos been adopted to nll lous multiple (batch) files. lt is often confused with its XModen- 1K cousin, due to Procom incorrectly calllng that Ynodem as uell. This Is the true Ynodem which is bcst known as Ymodon Batch. LGJ Ymoden-6: This protocol is a var: iation of Ymodem- Batch. It achleues very high transfer rates by sending. blocks one after another without waiting for. acknouledgencnt, This houcucr REQUIRES an error- -correcting modem with MNP or U. 42 hardware to detect and IIPITI:L amy line errurs. CP] Puna: Also knoum as MTp, this 1s also uery gond protocol Its uses an aduanced display uith a bor graph and sinulated LEDS. It also features crash recouery and has optional RLE Compression lai impurnur sjuraa TI imi-amuressril filex. [UI Supcrk: This is actually a protocol driver with scueral all 1n oe. Une advantage to Superk is that it will autonaticly sence what batch protocol thc other cnd is using and adapt to it as ucll. LHJ Hyper: This pratocol was designed to do Hyper- Drive file Lrausfers uith Tajux syslem. TL is hnlich aud :laims Lan he fasl. LKJ Kermit: This protocol uas desigmed to. allou differnt types. of computers, to exchange files. Almost any conputer using Rermit can scnd filcs to anothcr computer using Kermit. But it's very slou and does not handle batchs.. IJI Jmoden: This protocol 1s another uarlation of Xmodem. Likc Xnodcm, it is a non batch protocol only allouing anc filc pcr transfer. CMI MEGAlink: Amother outdated protocol which uas deriued from: Xnodem. Scalink and WXmodem. [n TRONSlink: mothcr outdatcd protocol sinular to) Xmoden. TL.1 SFAlink: SFAlink Wns amlher uari ial. inmi nf uf Xnudem deaurlujuel hy Systcn Enhanccment nssociatos. 1t is D: sliding windou protocol which is 15: to25 percent faster than: regular Xmodem, and also allous Datch transfers instrad of just one Cilc. CWI Windaucd Xmodcm: This is another variation of Xnodcn, which has longer delay time. This is used for remote services that can not talcrate Xmodems strict tining. [XI Xmodcn: This uscd to bc thc nost popular protocol uscd, but it has been repl laced by faster and nore reliable batch protocols. Thert are several varialiuns uf Xmudem, usiny ciller Checksum or the more reliable CRC error detection. The Xmodem-1 Lk is a uariatlon witch transfers 1024 bytes at a time instead of 128. Tress [Entcr] to continuc 0
May 19, 2026 at 7:45 PM