Returning to the development of my IMAP client, I add SOCKS5 support to be able to connect through a network proxy, particularly the one I made that is able to convert TLS-encrypted data from my real mailserver into plaintext that the Mac's slow CPU can support.

Continue reading 181 words...

In the previous episode I quickly ported OpenBSD's diff(1) but there wasn't any interface to select files or scroll through the output. I've since added a proper GUI with the ability to select files or folders, and in this episode I walk through the GUI and filesystem code and then add a proper Edit menu. I also make a formal release of the code and binary available for download.

Continue reading 199 words...

I've wanted a simple revision control system on my Mac since starting development of my IMAP client. Porting a large system like Git or even CVS would be overkill (and very slow), but maybe something small like OpenBSD's RCS implementation would suffice. For now, just having a diff utility would be helpful so in this video I port the guts of OpenBSD's diff(1) and show it generating a unified diff between revisions of a C file.

Continue reading 246 words...

In this episode, I fetch the flags of each message and for unseen messages, make them appear in the list in bold. That introduces an off-by-one which I run out of time to fix while recording.

Continue reading 143 words...

Today, I implement plaintext message viewing and hook it up to the message list. I also review a cleanup of int variables to make them either short or long throughout the project.

Continue reading 168 words...

I wrote a utility function to parse RFC822 dates/times sent by the IMAP server, which then converts them to a UTC time. In this video, I hook it into the IMAP parser and add a resource string for the local timezone offset setting, so these UTC times can then be converted to a local time and displayed in the message list.

Continue reading 177 words...

I recently read about using a jump instruction as an LDEF resource to allow keeping the list definition function in the main program executable/project, so in this video I implement the technique for the message list.

Continue reading 198 words...

In this video, I get the list of messages displaying again and fix a bug that occurred when closing a mailbox. I provide a quick summary of creating LDEF procedures in THINK C for drawing custom list cells, which I will expand upon on in a future video.

Continue reading 204 words...

In this episode, I fix the off-by-one error in the IMAP envelope parser noted in the previous episode, then improve the tracking of a malloced buffer that gets shifted around during parsing.

Continue reading 139 words...

Returning to the development of my IMAP client, in this video I add functionality to fetch the default mailbox name from the resource file (later to be moved to a preferences window) and then eventually locate a crash in the IMAP protocol parser from a bogus memmove.

Continue reading 234 words...

In this video, I create a new GUI application from scratch, create a resource file and add an image to it, and then display that image in a window. I also cover using THINK C's debugger to inspect a struct. Then, my Mac dies.

Continue reading 514 words...

I've been writing an IMAP client for and on my Mac 512Ke over the past many weeks. Taking inspiration from Andreas Kling's excellent YouTube videos documenting his development of the Serenity operating system, I thought I'd start screencasting some of my work.

This video is the first of hopefully many and presents a quick introduction to System 6, HFS resource forks, THINK C 5.0, and a look at some of the progress of my IMAP client so far.

Continue reading 363 words...

Now that my Mac 512Ke is able to use PPP for native TCP/IP, I wanted an easy way to do PPP between it and an OpenBSD server on my network. I initially did this with a physical serial cable, but was later able to do it over TCP so I could retain the use of my WiFi232.

Continue reading 1,191 words...

I recently came across an unused Dove Computer MacSnap RAM upgrade on eBay, so I bought it and installed it in my Mac 512Ke to bring its RAM up to 1Mb.

Continue reading 400 words...

Back in 2015, I created a BBS for Lobsters that worked in a web browser via WebSockets. After getting an old Mac earlier this year, I wanted a way to access the BBS from the Mac as natively as I could. Adding telnet and SSH frontends to the BBS was not too difficult, but being able to login from my Mac took a bit of work.

Continue reading 1,694 words...