SCS-Draw Technical Details

Compatible computers

Kaypro computers released before 1984 had a 2.5 MHz Z80 CPU and a character generator ROM with a 128-character 8x8 font. Starting in 1984, CP/M Kaypro models had a 4 MHz Z80A CPU and a character generator ROM with a 256-character 8x16 font. The extra 128 characters are divided into a 2x4 grid of "pixels" for Kaypro graphics. Kaypros with this character generator ROM were also capable of reverse video, which provided the other 128 characters necessary for the complete set of 256 2x4 block octant characters. Using the entire 80 columns and 25 rows with the Kaypro graphics characters permitted a 160x100 "graphics" mode. Any Kaypro computer with Kaypro graphics can run SCS-Draw.

1984 Kaypro character set
Kaypro character set

1984 Kaypro character set, inverted
Kaypro character set, inverted
Kaypro compatibility
Model CPU Floppy drive(s) Hard drive Modem RTC Kaypro graphics
2/83 2.5 MHz 2 x SSDD 191 KB no no no no
4/83 2.5 MHz 2 x DSDD 390 KB no no no no
2/84 4.0 MHz 2 x SSDD 191 KB no no no yes
2X 4.0 MHz 2 x DSDD 390 KB no no no yes
1 4.0 MHz 2 x DSDD 390 KB no no no yes
New 2 4.0 MHz 1 x DSDD 390 KB no no no yes
4/84 4.0 MHz 2 x DSDD 390 KB no 300-baud yes yes
4X 4.0 MHz 2 x DSHD 2.6 MB no 300-baud yes yes
Robie 4.0 MHz 2 x DSHD 2.6 MB no 300-baud yes yes
10 4.0 MHz 1 x DSDD 390 KB 1 x 10 MB no no yes
12X 4.0 MHz 1 x DSHD 2.6 MB 1 x 10 MB 300-baud yes yes

Software

SCS-Draw 1.0

Draw 1.0 came with two executable files and an image library.

File Size Description
DRAW.COM 35 KB SCS-Draw 1.0
SAMPLE.DRW 144 KB 26 sample images
SETDRAW.COM 1 KB Sets default printer
  1. Epson MX,RX,FX,JX
  2. Okidata 84,92,93
  3. HP Thinkjet
  4. C. Itoh Prowriter
  5. Gemini 10X & 15X
  6. TI-855, TI-865
  7. IBM Graphics Ptr.
  8. Anadex 9620A
  9. Diablo,Kaypro,Juki
SCS-Draw 1.0 title screen
SCS-Draw 1.0 title screen
SCS-Draw 1.0 displaying an image called Eye
SCS-Draw 1.0 displaying an image called Eye

Fonts are stored in DRAW.COM from 0x3AF9 through 0x49BC. The Regular font contains the entire set of 95 printable ASCII characters, while the Italic, Bold, and Little fonts contain only the 52 alphabetic characters.

4 help screens are stored in DRAW.COM from 0x7D26 through 0x83FC.

SCS-Draw 1.1

Draw 1.1 came with four executable files, separate files for the help screens and fonts, two image libraries, and an addendum to the User's Guide.

File Size Description
DRAW.COM 36 KB SCS-Draw 1.1
DRAWFONT 4 KB SCS-Draw Fonts - version 1.1
DRAWHELP 16 KB Online help screens
DRAWPACK.COM 6 KB Draw 1.1 Image Library Utility Program. Compresses sparse image libraries
MUSIC.DRW 23 KB 20 sample images
PRINT.COM 1 KB Printing program for new "Print to Disk" command
README 4 KB User's Guide Addendum
SAMPLE.DRW 73 KB 20 sample images
SETDRAW.COM 11 KB Draw 1.1 Printer Selection Program

52 alphabetic characters for all four fonts are stored in a file called DRAWFONT. The 43 remaining printable ASCII characters for the Regular font are in DRAW.COM from 0x30EC through 0x337F.

27 help screens are stored in a file called DRAWHELP.

Image Extractor

There was also a product called The Image Extractor for SCS-Draw, which could display images from PrintMaster .SHP image libraries - something which PrintMaster could not do! - and convert them to DRW format.

File Size Description
EXTRACT.COM 14 KB The Image Extractor for SCS-Draw
Image Extractor title screen
Image Extractor title screen
Image Extractor file select screen
Image Extractor file select screen

Serial numbers

Second City Software disks had a serial number on the label, composed of four digits which increased sequentially with each disk sold, a hyphen, and two characters which indicated the product. SCS-Draw displayed the serial number on the title screen, while Image Extractor did not.

Known serial numbers are:

Serial Program
1698-IE Image Extractor
1727-IE Image Extractor
1851-10 SCS-Draw 1.0
2475-11 SCS-Draw 1.1