From be5f6279e337c57bdd848bd2f589f691899211ae Mon Sep 17 00:00:00 2001 From: Dennis Boone Date: Mon, 23 Mar 2020 14:57:35 -0400 Subject: [PATCH] Restructure sample image explanation text. --- README.md | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/README.md b/README.md index 0b3c91b..edefa6d 100644 --- a/README.md +++ b/README.md @@ -67,17 +67,21 @@ The Rev. 19 tape is a save from an installed system. ## Sample System Images A set of sample system images derived from the public emulators can -be downloaded to get you started. The +be downloaded to get you started. These tarballs preserve +sparse allocation ("holes"), so that uninitialized space in the disk +images does not occupy actual space. You may need to tell `tar` to +preserve this sparse allocation when you extract, e.g. with the `-S` +option. + +The current [tarball](https://sysovl.info/pages/blobs/emulator/p50em_samplemachines_v4.tar) is 143510751 bytes, and its sha256sum is f7bf880cb1c7f32903ad85c4f52386cf2179067b8bfcf2c10b51c2e4dcf074dd. (gzip compression would only reduce this by ~400 kilobytes.) + V4 corrects ACL problems in the Rev19 and Rev24 images. -V3 removes additional junk, and rebuilds the disk images as 600 MB -drives, split 30/10 heads filesystem/paging. This tarball preserves -sparse allocation ("holes"), so that uninitialized space in the disk -images does not occupy actual space. You may need to tell `tar` to -preserve this sparse allocation when you extract, e.g. with the `-S` -option. Also includes enhancements to the wrapper scripts: directory -independence and the ability to run the `runem` script from a terminal. +V3 removed additional junk, and rebuildt the disk images as 600 MB +drives, split 30/10 heads filesystem/paging. It also included enhancements +to the wrapper scripts: directory independence and the ability to run the +`runem` script from a terminal.