FLASH80-DEMO
FILE INFORMATION
FILENAME(S): FLASH80-DEMO
FILE TYPE(S): PRG
FILE SIZE: 11K
FIRST SEEN: 2025-11-30 16:59:02
APPEARS ON: 1 disk(s)
FILE HASH
f4be396846942d3a5d80a6dc13299f0a8e42ed2569f37b2d33a324bf3ff365f7
FOUND ON DISKS (1 DISKS)
| DISK TITLE | FILENAME | FILE TYPE | COLLECTION | TRACK | SECTOR | ACTIONS |
|---|---|---|---|---|---|---|
| TALENTED RULERZ | FLASH80-DEMO | PRG | High Voltage Complete C64 Collection | 8 | 2 | DOWNLOAD FILE |
FILE CONTENT & ANALYSIS
> DETECTED: COMMODORE BASIC PROGRAM (LOAD ADDRESS $0801)
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I call | 000006F0: 69 74 20 0D 0A 46 6C 61 73 68 2D 38 30 20 62 65 |it ..Flash-80 be| 00000700: 63 61 75 73 65 20 49 20 63 61 6E 27 74 20 74 68 |cause I can't th| 00000710: 69 6E 6B 20 75 70 20 61 20 63 72 79 70 74 69 63 |ink up a cryptic| 00000720: 20 61 63 72 6F 6E 79 6D 20 66 6F 72 20 69 74 2E | acronym for it.| 00000730: 0D 0A 0D 0A E4 20 E4 5F EB 20 21 2E E4 20 24 5F |..... ._. !.. $_| 00000740: 20 20 2E E6 20 23 49 20 46 E3 20 27 54 20 48 20 | .. #I F. 'T H | 00000750: 49 20 53 E3 20 23 49 20 53 E3 20 25 54 20 4F 20 |I S. #I S. %T O | 00000760: 4F E3 20 29 48 20 41 20 52 20 44 0D 0A E3 20 27 |O. )H A R D... '| 00000770: 2F 23 20 2F 5F 5C 5F E9 20 29 7C 5C 5F 7C 2F 5F |/# /_\_. )|\_|/_| 00000780: 5F 2F 7C E6 20 23 54 20 4F E3 20 29 52 20 45 20 |_/|. #T O. )R E | 00000790: 41 20 44 20 2C E3 20 25 54 20 52 20 59 E3 20 3A |A D ,. %T R Y. :| 000007A0: 54 20 55 20 52 20 4E 20 49 20 4E 20 47 0D 0A 20 |T U R N I N G.. | 000007B0: 20 7C 20 20 7C 2F 6F 5C 6F 5C E7 20 2B 2F 20 2F | | |/o\o\. +/ /| 000007C0: 20 5C 2F 20 5C 20 20 5C E5 20 25 54 20 48 20 45 | \/ \ \. %T H E| 000007D0: E3 20 31 43 20 4F 20 4E 20 54 20 52 20 41 20 53 |. 1C O N T R A S| 000007E0: 20 54 20 2C E3 20 23 4F 20 52 E3 20 32 55 20 53 | T ,. #O R. 2U S| 000007F0: 20 45 0D 0A 20 20 7C 20 20 5C 5C 5F 2F 5F 2F E6 | E.. | \\_/_/.| 00000800: 20 2D 2F 5F 5F 7C 4F 7C 7C 4F 7C 5F 5F 20 5C E4 | -/__|O||O|__ \.| 00000810: 20 21 41 E3 20 27 4D 20 4F 20 4E 20 4F E3 20 2D | !A. 'M O N O. -| 00000820: 4D 20 4F 20 4E 20 49 20 54 20 4F 20 52 E3 20 2E |M O N I T O R. .| 00000830: 54 20 48 20 41 20 54 0D 0A 20 2F 20 7C 5F E3 20 |T H A T.. / |_. | 00000840: 21 7C E7 20 2F 7C 2F 5F 20 5C 5F 2F 5C 5F 2F 20 |!|. /|/_ \_/\_/ | 00000850: 5F 5C 20 7C E3 20 25 48 20 41 20 53 E3 20 21 41 |_\ |. %H A S. !A| 00000860: E3 20 27 56 20 45 20 52 20 59 E3 20 37 53 20 54 |. 'V E R Y. 7S T| 00000870: 20 41 20 54 20 49 20 43 0D 0A 7C 20 20 7C 7C 5C | A T I C..| ||\| 00000880: 5F 20 7E 7C E6 20 25 7C 20 7C 20 28 E4 5F 26 29 |_ ~|. %| | (._&)| 00000890: 20 7C 20 7C 7C E3 20 2F 44 20 49 20 53 20 50 20 | | ||. /D I S P | 000008A0: 4C 20 41 20 59 20 2E E3 20 25 55 20 53 20 45 E3 |L A Y .. %U S E.| 000008B0: 20 2F 46 20 31 20 2D 20 46 20 37 20 0D 0A 7C 20 | /F 1 - F 7 ..| | 000008C0: 20 E3 7C 23 20 5C 2F E7 20 23 5C 2F 5C E3 5F 29 | .|# \/. #\/\._)| 000008D0: 2F 5C 5F 5F 2F 20 20 2F 2F E3 20 23 54 20 4F E3 |/\__/ //. #T O.| 000008E0: 20 2B 43 20 48 20 41 20 4E 20 47 20 45 E3 20 32 | +C H A N G E. 2| 000008F0: 43 20 4F 20 4C 20 4F 20 52 20 53 20 2E 0D 0A 7C |C O L O R S ...|| 00000900: 20 20 E3 7C 21 5F E9 20 23 28 5F 2F E9 20 2C 7C | .|!_. #(_/. ,|| 00000910: 7C 20 0D 0A 20 5C 2F 2F 20 20 7C EA 20 21 7C EA || .. \// |. !|.| 00000920: 20 22 7C 7C E3 20 60 2F 49 66 20 79 6F 75 20 63 | "||. `/If you c| 00000930: 61 6E 20 72 65 61 64 20 74 68 69 73 2C 20 74 68 |an read this, th| 00000940: 65 6E 20 49 20 67 75 65 73 73 20 79 6F 75 0D 0A |en I guess you..| 00000950: 20 20 7C 7C 20 20 7C EA 20 21 7C EA 20 60 37 7C | || |. !|. `7|| 00000960: 7C 5C 20 20 63 61 72 65 20 68 6F 77 20 69 74 27 ||\ care how it'| 00000970: 73 20 64 6F 6E 65 2E 20 20 53 69 6D 70 6C 79 20 |s done. Simply | 00000980: 70 75 74 2C 20 79 6F 75 20 61 72 65 0D 0A 20 20 |put, you are.. | 00000990: 7C 7C 5F 20 20 5C EA 20 21 5C E8 20 60 39 2F 2F |||_ \. !\. `9//| 000009A0: 5F 2F 20 73 65 65 69 6E 67 20 74 77 6F 20 34 30 |_/ seeing two 40| 000009B0: 2D 63 6F 6C 75 6D 6E 20 73 63 72 65 65 6E 73 20 |-column screens | 000009C0: 62 65 69 6E 67 20 69 6E 74 65 72 2D 0D 0A 20 20 |being inter-.. | 000009D0: 5C 5F 7C 20 20 6F 7C EA 20 21 5C E6 5F 22 2F 2F |\_| o|. !\._"//| 000009E0: E4 20 60 2D 6C 61 63 65 64 2C 20 6D 75 63 68 20 |. `-laced, much | 000009F0: 6C 69 6B 65 20 61 6E 20 6F 6C 64 20 41 6D 69 67 |like an old Amig| 00000A00: 61 27 73 20 36 34 30 78 34 30 30 0D 0A 20 20 2F |a's 640x400.. /| 00000A10: 5C E3 5F 21 2F E9 20 60 3D 5F 5F 20 7C 7C 20 5F |\._!/. `=__ || _| 00000A20: 5F 7C 7C 20 73 63 72 65 65 6E 20 69 73 20 72 65 |_|| screen is re| 00000A30: 61 6C 6C 79 20 61 20 70 61 69 72 20 6F 66 20 69 |ally a pair of i| 00000A40: 6E 74 65 72 6C 61 63 64 20 36 34 30 78 32 30 30 |nterlacd 640x200| 00000A50: 0D 0A 20 2F 20 20 E4 7C 22 5F 5F E6 20 21 28 E4 |.. / .|"__. !(.| 00000A60: 5F 21 28 E4 5F 60 2E 29 20 73 63 72 65 65 6E 73 |_!(._`.) screens| 00000A70: 2E 20 20 48 6F 6C 64 20 74 68 65 20 53 48 49 46 |. Hold the SHIF| 00000A80: 54 20 6B 65 79 20 66 6F 72 20 61 20 67 6C 69 6D |T key for a glim| 00000A90: 70 73 65 0D 0A E4 20 21 28 E3 5F 23 29 5F 29 F1 |pse... !(._#)_).| 00000AA0: 20 61 03 61 74 20 77 68 61 74 27 73 20 52 45 41 | a.at what's REA| 00000AB0: 4C 4C 59 20 68 61 70 70 65 6E 69 6E 67 2E 0D 0A |LLY happening...| 00000AC0: 0D 0A 50 75 73 68 20 52 45 54 55 52 4E 20 74 6F |..Push RETURN to| 00000AD0: 20 73 63 72 6F 6C 6C 20 64 6F 77 6E 20 6F 6E 65 | scroll down one| 00000AE0: 20 6C 69 6E 65 2C 20 6F 72 20 53 50 41 43 45 20 | line, or SPACE | 00000AF0: 74 6F 20 73 63 72 6F 6C 6C 20 64 6F 77 6E 20 6F |to scroll down o| 00000B00: 6E 65 20 73 63 72 65 65 6E 2E 0D 0A 0D 0A 47 72 |ne screen.....Gr| 00000B10: 65 65 74 69 6E 67 73 20 74 6F 20 53 74 79 6C 65 |eetings to Style| 00000B20: 2C 20 63 6F 6F 6C 68 61 6E 64 2C 20 58 6D 69 6B |, coolhand, Xmik| 00000B30: 65 58 2C 20 54 72 6F 6E 2C 20 74 68 65 20 62 6F |eX, Tron, the bo| 00000B40: 74 73 2C 20 42 61 6E 7A 61 69 2C 20 0D 0A 42 6C |ts, Banzai, ..Bl| 00000B50: 6F 62 2C 20 20 61 6E 64 20 67 72 6F 75 70 73 20 |ob, and groups | 00000B60: 6C 69 6B 65 20 46 34 43 47 2C 20 42 79 74 65 72 |like F4CG, Byter| 00000B70: 61 70 65 72 73 2C 20 61 6E 79 6F 6E 65 20 77 68 |apers, anyone wh| 00000B80: 6F 20 73 74 69 6C 6C 20 0D 0A 70 72 6F 67 72 61 |o still ..progra| 00000B90: 6D 73 20 4E 54 53 43 2C 20 65 74 63 2E 20 65 74 |ms NTSC, etc. et| 00000BA0: 63 2E 20 65 74 63 E3 2E 22 0D 0A E3 2D 6D 0E 0D |c. etc.."...-m..| 00000BB0: 0A 0D 0A 49 20 6B 6E 6F 77 20 77 68 61 74 20 79 |...I know what y| 00000BC0: 6F 75 27 72 65 20 74 68 69 6E 6B 69 6E 67 2E 20 |ou're thinking. | 00000BD0: 20 22 54 68 69 73 20 69 73 20 68 61 72 64 20 61 | "This is hard a| 00000BE0: 73 20 68 65 6C 6C 20 74 6F 20 72 65 61 64 21 20 |s hell to read! | 00000BF0: 20 54 68 65 72 65 0D 0A 61 72 65 20 6D 69 6C 6C | There..are mill| 00000C00: 69 6F 6E 73 20 6F 66 20 6F 74 68 65 72 20 38 30 |ions of other 80| 00000C10: 2D 63 6F 6C 75 6D 6E 20 72 6F 75 74 69 6E 65 73 |-column routines| 00000C20: 20 6F 75 74 20 74 68 65 72 65 20 74 68 61 74 20 | out there that | 00000C30: 77 6F 72 6B 20 70 65 72 66 65 63 74 6C 79 20 0D |work perfectly .| 00000C40: 0A 77 65 6C 6C 21 20 20 57 68 79 20 77 6F 75 6C |.well! Why woul| 00000C50: 64 20 61 6E 79 6F 6E 65 20 77 61 6E 74 20 74 6F |d anyone want to| 00000C60: 20 70 75 74 20 75 70 20 77 69 74 68 20 74 68 69 | put up with thi| 00000C70: 73 3F 22 0D 0A 0D 0A 57 65 6C 6C 2C 20 49 27 6D |s?"....Well, I'm| 00000C80: 20 67 6C 61 64 20 79 6F 75 20 61 73 6B 65 64 2C | glad you asked,| 00000C90: 20 62 65 63 61 75 73 65 20 69 66 20 46 6C 61 73 | because if Flas| 00000CA0: 68 2D 38 30 20 64 69 64 20 6E 6F 74 20 68 61 76 |h-80 did not hav| 00000CB0: 65 20 69 74 73 20 61 64 76 61 6E 74 61 67 65 73 |e its advantages| 00000CC0: 2C 0D 0A 69 74 20 77 6F 75 6C 64 20 6E 6F 74 20 |,..it would not | 00000CD0: 68 61 76 65 20 62 65 65 6E 20 64 6F 6E 65 2E 20 |have been done. | 00000CE0: 20 4D 61 6E 79 20 70 65 6F 70 6C 65 20 77 68 6F | Many people who| 00000CF0: 20 73 65 65 20 74 68 69 73 20 63 61 6E 20 70 72 | see this can pr| 00000D00: 6F 62 61 62 6C 79 0D 0A 74 65 6C 6C 20 72 69 67 |obably..tell rig| 00000D10: 68 74 20 61 77 61 79 20 74 68 65 20 61 64 76 61 |ht away the adva| 00000D20: 6E 74 61 67 65 73 20 6F 66 20 75 73 69 6E 67 20 |ntages of using | 00000D30: 74 68 69 73 20 6B 69 6E 64 20 6F 66 20 38 30 2D |this kind of 80-| 00000D40: 63 6F 6C 75 6D 6E 20 72 6F 75 74 69 6E 65 2E 0D |column routine..| 00000D50: 0A 28 53 6B 69 70 20 74 68 72 6F 75 67 68 20 74 |.(Skip through t| 00000D60: 68 69 73 20 69 66 20 79 6F 75 20 6C 69 6B 65 2C |his if you like,| 00000D70: 20 74 68 65 72 65 27 73 20 73 6F 6D 65 20 6D 6F | there's some mo| 00000D80: 72 65 20 41 53 43 49 49 20 61 72 74 20 61 74 20 |re ASCII art at | 00000D90: 74 68 65 20 65 6E 64 2E 29 0D 0A 0D 0A 41 73 20 |the end.)....As | 00000DA0: 79 6F 75 20 61 6C 6C 20 6B 6E 6F 77 2C 20 6D 6F |you all know, mo| 00000DB0: 73 74 20 43 6F 6D 6D 6F 64 6F 72 65 20 36 34 27 |st Commodore 64'| 00000DC0: 73 20 68 61 76 65 20 61 62 6F 75 74 20 36 34 6B |s have about 64k| 00000DD0: 20 6F 66 20 6D 65 6D 6F 72 79 2C 20 6F 66 20 77 | of memory, of w| 00000DE0: 68 69 63 68 20 0D 0A 61 62 6F 75 74 20 35 37 6B |hich ..about 57k| 00000DF0: 20 28 77 69 6C 64 20 67 75 65 73 73 29 20 69 73 | (wild guess) is| 00000E00: 20 61 63 74 75 61 6C 6C 79 20 75 73 65 66 75 6C | actually useful| 00000E10: 20 66 6F 72 20 73 74 6F 72 69 6E 67 20 64 61 74 | for storing dat| 00000E20: 61 2E 20 20 41 73 20 69 74 20 0D 0A 6E 6F 72 6D |a. As it ..norm| 00000E30: 61 6C 6C 79 20 67 6F 65 73 20 6F 6E 20 61 20 72 |ally goes on a r| 00000E40: 65 67 75 6C 61 72 20 34 30 2D 63 6F 6C 75 6D 6E |egular 40-column| 00000E50: 20 70 72 6F 67 72 61 6D 2C 20 31 6B 20 69 73 20 | program, 1k is | 00000E60: 75 73 65 64 20 66 6F 72 20 6D 65 6D 6F 72 79 2C |used for memory,| 00000E70: 20 61 6E 64 20 0D 0A 74 68 65 20 72 65 73 74 20 | and ..the rest | 00000E80: 69 73 20 75 73 65 64 20 66 6F 72 20 64 61 74 61 |is used for data| 00000E90: 2C 20 77 68 69 6C 65 20 31 6B 20 6F 66 20 74 68 |, while 1k of th| 00000EA0: 65 20 76 69 64 65 6F 20 63 68 69 70 20 69 73 20 |e video chip is | 00000EB0: 73 65 74 20 61 73 69 64 65 20 6A 75 73 74 20 0D |set aside just .| 00000EC0: 0A 66 6F 72 20 63 6F 6C 6F 75 72 20 6D 65 6D 6F |.for colour memo| 00000ED0: 72 79 2C 20 61 6E 64 20 74 68 65 20 56 49 43 20 |ry, and the VIC | 00000EE0: 63 68 69 70 20 71 75 69 65 74 6C 79 20 74 61 6B |chip quietly tak| 00000EF0: 65 73 20 69 74 73 20 63 68 61 72 61 63 74 65 72 |es its character| 00000F00: 20 73 65 74 20 66 72 6F 6D 20 0D 0A 52 4F 4D 20 | set from ..ROM | 00000F10: 77 68 69 63 68 20 69 73 6E 27 74 20 65 76 65 6E |which isn't even| 00000F20: 20 72 65 61 64 69 6C 79 20 61 76 61 69 6C 61 62 | readily availab| 00000F30: 6C 65 20 74 6F 20 74 68 65 20 36 35 31 30 2C 20 |le to the 6510, | 00000F40: 73 6F 20 79 6F 75 20 64 6F 6E 27 74 20 68 61 76 |so you don't hav| 00000F50: 65 20 74 6F 20 0D 0A 77 6F 72 72 79 20 61 62 6F |e to ..worry abo| 00000F60: 75 74 20 69 74 2E 20 20 53 6F 20 74 68 65 20 43 |ut it. So the C| 00000F70: 42 4D 27 73 20 73 74 61 6E 64 61 72 64 20 73 63 |BM's standard sc| 00000F80: 72 65 65 6E 20 65 64 69 74 6F 72 20 75 73 65 73 |reen editor uses| 00000F90: 20 61 20 67 72 61 6E 64 20 74 6F 74 61 6C 20 0D | a grand total .| 00000FA0: 0A 6F 66 20 31 4B 20 28 32 4B 20 69 66 20 79 6F |.of 1K (2K if yo| 00000FB0: 75 20 63 6F 75 6E 74 20 74 68 65 20 63 6F 6C 6F |u count the colo| 00000FC0: 75 72 20 6D 65 6D 6F 72 79 2C 20 77 68 69 63 68 |ur memory, which| 00000FD0: 20 69 73 6E 27 74 20 67 6F 6F 64 20 66 6F 72 20 | isn't good for | 00000FE0: 61 6E 79 74 68 69 6E 67 20 0D 0A 65 6C 73 65 20 |anything ..else | 00000FF0: 61 6E 79 77 61 79 29 2C 20 61 6E 64 20 61 20 66 |anyway), and a f| 00001000: 65 77 20 7A 65 72 6F 2D 70 61 67 65 20 72 65 67 |ew zero-page reg| 00001010: 69 73 74 65 72 73 2E 0D 0A 0D 0A 42 75 74 20 38 |isters.....But 8| 00001020: 30 2D 63 6F 6C 75 6D 6E 20 70 72 6F 67 72 61 6D |0-column program| 00001030: 73 20 65 61 74 20 75 70 20 72 65 73 6F 75 72 63 |s eat up resourc| 00001040: 65 73 20 6C 69 6B 65 20 6E 6F 62 6F 64 79 27 73 |es like nobody's| 00001050: 20 62 75 73 69 6E 65 73 73 2E 20 20 53 74 6F 72 | business. Stor| 00001060: 69 6E 67 20 0D 0A 74 68 65 20 66 6F 6E 74 20 63 |ing ..the font c| 00001070: 61 6E 20 74 61 6B 65 20 61 6E 79 77 68 65 72 65 |an take anywhere| 00001080: 20 66 72 6F 6D 20 31 6B 20 74 6F 20 34 6B 20 6F | from 1k to 4k o| 00001090: 66 20 6D 65 6D 6F 72 79 2E 20 20 54 68 65 20 73 |f memory. The s| 000010A0: 63 72 65 65 6E 20 69 74 73 65 6C 66 20 0D 0A 69 |creen itself ..i| 000010B0: 73 20 74 68 65 20 62 69 67 20 72 65 73 6F 75 72 |s the big resour| 000010C0: 63 65 20 68 6F 67 2E 20 20 38 6B 20 6F 66 20 6D |ce hog. 8k of m| 000010D0: 65 6D 6F 72 79 20 6D 75 73 74 20 62 65 20 61 6C |emory must be al| 000010E0: 6C 6F 63 61 74 65 64 20 74 6F 20 74 68 65 20 68 |located to the h| 000010F0: 69 2D 72 65 73 20 0D 0A 73 63 72 65 65 6E 20 69 |i-res ..screen i| 00001100: 74 73 65 6C 66 2E 20 20 41 6E 64 20 73 69 6E 63 |tself. 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This spe| 00001230: 6C 6C 73 20 74 72 6F 75 62 6C 65 20 66 6F 72 20 |lls trouble for | 00001240: 74 65 78 74 20 65 64 69 74 6F 72 73 2C 20 6F 72 |text editors, or| 00001250: 20 61 6E 79 20 70 72 6F 67 72 61 6D 20 77 68 69 | any program whi| 00001260: 63 68 20 0D 0A 6D 69 67 68 74 20 6C 69 6B 65 20 |ch ..might like | 00001270: 74 6F 20 68 61 76 65 20 73 6F 6D 65 20 62 72 65 |to have some bre| 00001280: 61 74 68 69 6E 67 20 72 6F 6F 6D 2E 0D 0A 0D 0A |athing room.....| 00001290: 41 6E 6F 74 68 65 72 20 63 6F 6E 73 69 64 65 72 |Another consider| 000012A0: 61 74 69 6F 6E 20 69 73 20 73 70 65 65 64 2E 20 |ation is speed. | 000012B0: 20 54 6F 20 64 72 61 77 20 61 20 63 68 61 72 61 | To draw a chara| 000012C0: 63 74 65 72 20 6F 6E 20 61 6E 20 38 30 2D 63 6F |cter on an 80-co| 000012D0: 6C 75 6D 6E 20 0D 0A 73 63 72 65 65 6E 2C 20 61 |lumn ..screen, a| 000012E0: 66 74 65 72 20 63 61 6C 63 75 6C 61 74 69 6E 67 |fter calculating| 000012F0: 20 69 74 73 20 70 6F 73 69 74 69 6F 6E 2C 20 79 | its position, y| 00001300: 6F 75 20 68 61 76 65 20 74 6F 20 66 65 74 63 68 |ou have to fetch| 00001310: 20 61 6E 64 20 70 6C 6F 74 20 65 69 67 68 74 20 | and plot eight | 00001320: 0D 0A 6E 79 62 62 6C 65 73 20 66 72 6F 6D 20 79 |..nybbles from y| 00001330: 6F 75 72 20 66 6F 6E 74 20 6F 6E 74 6F 20 74 68 |our font onto th| 00001340: 65 20 73 63 72 65 65 6E 2E 20 20 45 49 47 48 54 |e screen. 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T| 000013E0: 68 69 73 20 73 70 65 6C 6C 73 20 74 72 6F 75 62 |his spells troub| 000013F0: 6C 65 20 66 6F 72 20 0D 0A 68 69 67 68 2D 73 70 |le for ..high-sp| 00001400: 65 65 64 20 74 65 72 6D 69 6E 61 6C 20 70 72 6F |eed terminal pro| 00001410: 67 72 61 6D 73 20 6C 69 6B 65 20 4E 6F 76 61 74 |grams like Novat| 00001420: 65 72 6D 2E 0D 0A 0D 0A 57 68 61 74 20 6D 61 6B |erm.....What mak| 00001430: 65 73 20 46 6C 61 73 68 2D 38 30 20 70 72 65 66 |es Flash-80 pref| 00001440: 65 72 61 62 6C 65 20 69 73 20 74 68 61 74 20 69 |erable is that i| 00001450: 74 20 74 61 6B 65 73 20 75 70 2C 20 70 72 6F 62 |t takes up, prob| 00001460: 61 62 6C 79 2C 20 61 20 4D 41 58 49 4D 55 4D 20 |ably, a MAXIMUM | 00001470: 0D 0A 6F 66 20 36 6B 2C 20 69 66 20 79 6F 75 20 |..of 6k, if you | 00001480: 77 61 6E 74 65 64 20 74 6F 20 68 61 76 65 20 73 |wanted to have s| 00001490: 65 70 61 72 61 74 65 20 75 70 70 65 72 63 61 73 |eparate uppercas| 000014A0: 65 20 61 6E 64 20 6C 6F 77 65 72 63 61 73 65 20 |e and lowercase | 000014B0: 66 6F 6E 74 73 2E 20 20 49 66 20 0D 0A 79 6F 75 |fonts. If ..you| 000014C0: 20 75 73 65 20 6F 6E 6C 79 20 6F 6E 65 20 66 6F | use only one fo| 000014D0: 6E 74 2C 20 69 74 20 77 69 6C 6C 20 6F 6E 6C 79 |nt, it will only| 000014E0: 20 74 61 6B 65 20 34 6B 20 6F 66 20 75 73 61 62 | take 4k of usab| 000014F0: 6C 65 20 6D 65 6D 6F 72 79 21 20 20 41 6E 64 20 |le memory! And | 00001500: 69 6E 20 0D 0A 74 68 69 73 20 64 65 6D 6F 2C 20 |in ..this demo, | 00001510: 73 69 6E 63 65 20 49 20 64 69 64 6E 27 74 20 75 |since I didn't u| 00001520: 73 65 20 61 6E 79 20 72 65 76 65 72 73 65 20 63 |se any reverse c| 00001530: 68 61 72 61 63 74 65 72 73 2C 20 49 27 6D 20 75 |haracters, I'm u| 00001540: 73 69 6E 67 20 6F 6E 6C 79 20 33 6B 20 0D 0A 6F |sing only 3k ..o| 00001550: 66 20 6D 65 6D 6F 72 79 21 0D 0A 0D 0A 49 74 27 |f memory!....It'| 00001560: 73 20 66 61 73 74 65 72 2C 20 74 6F 6F 2E 20 20 |s faster, too. | 00001570: 49 6E 73 74 65 61 64 20 6F 66 20 68 61 76 69 6E |Instead of havin| 00001580: 67 20 74 6F 20 6D 75 63 6B 20 61 72 6F 75 6E 64 |g to muck around| 00001590: 20 77 69 74 68 20 62 69 74 20 73 68 69 66 74 69 | with bit shifti| 000015A0: 6E 67 20 6F 72 20 0D 0A 69 6E 74 65 6E 73 65 20 |ng or ..intense | 000015B0: 42 6F 6F 6C 65 61 6E 20 6D 61 74 68 2C 20 49 20 |Boolean math, I | 000015C0: 6A 75 73 74 20 66 69 6E 64 20 61 20 73 70 6F 74 |just find a spot| 000015D0: 20 6F 6E 20 74 68 65 20 73 63 72 65 65 6E 20 61 | on the screen a| 000015E0: 6E 64 20 50 4F 4B 45 20 74 6F 20 69 74 2C 20 0D |nd POKE to it, .| 000015F0: 0A 61 6C 6D 6F 73 74 20 6C 69 6B 65 20 61 20 6E |.almost like a n| 00001600: 6F 72 6D 61 6C 20 73 63 72 65 65 6E 2E 20 20 54 |ormal screen. T| 00001610: 68 65 20 64 69 66 66 65 72 65 6E 63 65 20 69 73 |he difference is| 00001620: 2C 20 69 74 27 73 20 72 65 61 6C 6C 79 20 74 77 |, it's really tw| 00001630: 6F 20 0D 0A 73 63 72 65 65 6E 73 2C 20 62 75 74 |o ..screens, but| 00001640: 20 74 68 61 74 27 73 20 70 72 65 74 74 79 20 65 | that's pretty e| 00001650: 61 73 79 20 74 6F 20 63 6F 6D 70 65 6E 73 61 74 |asy to compensat| 00001660: 65 20 66 6F 72 2E 20 20 41 73 20 6F 6E 65 20 63 |e for. As one c| 00001670: 61 6E 20 65 61 73 69 6C 79 20 0D 0A 74 65 6C 6C |an easily ..tell| 00001680: 2C 20 49 20 68 61 76 65 20 74 6F 20 73 74 6F 72 |, I have to stor| 00001690: 65 20 74 68 65 20 6F 64 64 2D 63 6F 6C 75 6D 6E |e the odd-column| 000016A0: 65 64 20 63 68 61 72 61 63 74 65 72 73 20 6F 6E |ed characters on| 000016B0: 20 6F 6E 65 20 73 63 72 65 65 6E 2C 20 61 6E 64 | one screen, and| 000016C0: 20 74 68 65 20 0D 0A 65 76 65 6E 2D 6E 75 6D 62 | the ..even-numb| 000016D0: 65 72 65 64 20 63 68 61 72 61 63 74 65 72 73 20 |ered characters | 000016E0: 6F 6E 20 74 68 65 20 6F 74 68 65 72 2C 20 62 75 |on the other, bu| 000016F0: 74 20 74 68 65 20 63 61 6C 63 75 6C 61 74 69 6F |t the calculatio| 00001700: 6E 20 66 6F 72 20 74 68 61 74 20 69 73 20 0D 0A |n for that is ..| 00001710: 6A 75 73 74 20 61 20 66 65 77 20 69 6E 73 74 72 |just a few instr| 00001720: 75 63 74 69 6F 6E 73 2E 20 20 53 63 72 6F 6C 6C |uctions. 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Al| 000025C0: 73 6F 2C 20 73 69 6E 63 65 20 74 68 65 20 43 36 |so, since the C6| 000025D0: 34 20 63 61 6E 6E 6F 74 20 66 6C 69 70 0D 0A 62 |4 cannot flip..b| 000025E0: 65 74 77 65 65 6E 20 63 6F 6C 6F 72 20 70 61 67 |etween color pag| 000025F0: 65 73 20 61 73 20 69 74 20 63 61 6E 20 77 69 74 |es as it can wit| 00002600: 68 20 73 63 72 65 65 6E 20 70 61 67 65 73 2C 20 |h screen pages, | 00002610: 63 6F 6C 6F 72 0D 0A 72 65 73 6F 6C 75 74 69 6F |color..resolutio| 00002620: 6E 20 77 69 6C 6C 20 62 65 20 74 68 65 20 73 61 |n will be the sa| 00002630: 6D 65 20 61 73 20 4E 6F 76 61 74 65 72 6D 27 73 |me as Novaterm's| 00002640: 20 28 65 76 65 6E 2D 6E 75 6D 62 65 72 65 64 0D | (even-numbered.| 00002650: 0A 63 6F 6C 75 6D 6E 73 20 6D 75 73 74 20 62 65 |.columns must be| 00002660: 20 74 68 65 20 73 61 6D 65 20 63 6F 6C 6F 72 20 | the same color | 00002670: 61 73 20 74 68 65 69 72 20 6F 64 64 2D 6E 75 6D |as their odd-num| 00002680: 62 65 72 65 64 0D 0A 6E 65 69 67 68 62 6F 72 29 |bered..neighbor)| 00002690: 2E 20 20 54 68 65 6F 72 65 74 69 63 61 6C 6C 79 |. Theoretically| 000026A0: 2C 20 6F 6E 65 20 63 6F 75 6C 64 20 6B 65 65 70 |, one could keep| 000026B0: 20 74 77 6F 20 63 6F 6C 6F 72 20 70 61 67 65 73 | two color pages| 000026C0: 0D 0A 69 6E 20 63 6F 6E 76 65 6E 74 69 6F 6E 61 |..in conventiona| 000026D0: 6C 20 6D 65 6D 6F 72 79 20 61 6E 64 20 63 6F 70 |l memory and cop| 000026E0: 79 20 65 61 63 68 20 6F 6E 65 20 74 6F 20 63 6F |y each one to co| 000026F0: 6C 6F 72 20 6D 65 6D 6F 72 79 0D 0A 6F 6E 20 65 |lor memory..on e| 00002700: 76 65 72 79 20 66 72 61 6D 65 2C 20 62 75 74 20 |very frame, but | 00002710: 77 68 6F 20 77 6F 75 6C 64 20 77 61 6E 74 20 74 |who would want t| 00002720: 6F 3F 20 20 28 54 68 69 73 20 77 6F 75 6C 64 20 |o? (This would | 00002730: 62 65 0D 0A 75 6E 6E 65 63 65 73 73 61 72 79 20 |be..unnecessary | 00002740: 6F 6E 20 74 68 65 20 56 49 43 2D 32 30 2C 20 77 |on the VIC-20, w| 00002750: 68 69 63 68 20 43 41 4E 20 66 6C 69 70 20 63 6F |hich CAN flip co| 00002760: 6C 6F 72 20 70 61 67 65 73 2C 0D 0A 6F 72 20 73 |lor pages,..or s| 00002770: 6F 20 49 27 76 65 20 68 65 61 72 64 2E 29 0D 0A |o I've heard.)..| 00002780: 0D 0A 41 70 70 6C 69 63 61 74 69 6F 6E 73 20 6F |..Applications o| 00002790: 66 20 46 6C 61 73 68 2D 38 30 20 61 72 65 20 69 |f Flash-80 are i| 000027A0: 6E 6E 75 6D 65 72 61 62 6C 65 2E 20 20 28 49 20 |nnumerable. (I | 000027B0: 74 68 69 6E 6B 20 74 68 61 74 27 73 0D 0A 61 20 |think that's..a | 000027C0: 77 6F 72 64 3F 29 20 20 49 74 20 68 61 73 20 61 |word?) It has a| 000027D0: 6C 72 65 61 64 79 20 62 65 65 6E 20 69 6D 70 6C |lready been impl| 000027E0: 65 6D 65 6E 74 65 64 20 69 6E 20 46 6C 69 63 6B |emented in Flick| 000027F0: 65 72 74 65 72 6D 2C 0D 0A 61 73 20 49 20 68 61 |erterm,..as I ha| 00002800: 76 65 20 6D 65 6E 74 69 6F 6E 65 64 2E 20 20 54 |ve mentioned. T| 00002810: 68 65 20 6C 6F 77 20 6D 65 6D 6F 72 79 20 75 73 |he low memory us| 00002820: 61 67 65 20 6D 61 6B 65 73 20 69 74 20 70 65 72 |age makes it per| 00002830: 66 65 63 74 0D 0A 66 6F 72 20 75 73 65 20 69 6E |fect..for use in| 00002840: 20 74 65 78 74 20 65 64 69 74 6F 72 73 2C 20 73 | text editors, s| 00002850: 70 72 65 61 64 73 68 65 65 74 73 2C 20 6F 72 20 |preadsheets, or | 00002860: 64 61 74 61 62 61 73 65 73 2E 20 20 4F 6E 65 20 |databases. One | 00002870: 63 6F 75 6C 64 0D 0A 70 75 74 20 62 6F 74 68 20 |could..put both | 00002880: 50 45 54 53 43 49 49 20 73 65 74 73 20 69 6E 20 |PETSCII sets in | 00002890: 61 6E 64 20 72 65 70 6C 61 63 65 20 74 68 65 20 |and replace the | 000028A0: 73 63 72 65 65 6E 20 65 64 69 74 6F 72 20 77 69 |screen editor wi| 000028B0: 74 68 20 69 74 2C 0D 0A 61 6C 6C 6F 77 69 6E 67 |th it,..allowing| 000028C0: 20 6F 6E 65 20 74 6F 20 70 72 6F 67 72 61 6D 20 | one to program | 000028D0: 69 6E 20 42 41 53 49 43 20 69 6E 20 38 30 20 63 |in BASIC in 80 c| 000028E0: 6F 6C 75 6D 6E 73 2C 20 6E 6F 74 20 75 6E 6C 69 |olumns, not unli| 000028F0: 6B 65 0D 0A 43 6F 6D 70 75 74 65 21 27 73 20 53 |ke..Compute!'s S| 00002900: 63 72 65 65 6E 2D 38 30 20 70 72 6F 67 72 61 6D |creen-80 program| 00002910: 2E 20 20 49 74 20 77 6F 75 6C 64 20 62 65 20 65 |. It would be e| 00002920: 76 65 6E 20 6D 6F 72 65 20 75 73 65 66 75 6C 0D |ven more useful.| 00002930: 0A 61 73 20 61 20 43 52 54 20 64 65 76 69 63 65 |.as a CRT device| 00002940: 20 66 6F 72 20 6F 74 68 65 72 20 70 72 6F 67 72 | for other progr| 00002950: 61 6D 6D 69 6E 67 20 6C 61 6E 67 75 61 67 65 73 |amming languages| 00002960: 2E 20 20 57 6F 75 6C 64 6E 27 74 0D 0A 43 20 70 |. Wouldn't..C p| 00002970: 72 6F 67 72 61 6D 73 20 62 65 20 65 61 73 69 65 |rograms be easie| 00002980: 72 20 74 6F 20 70 6F 72 74 20 74 6F 20 61 6E 20 |r to port to an | 00002990: 38 30 20 63 6F 6C 75 6D 6E 20 73 63 72 65 65 6E |80 column screen| 000029A0: 3F 0D 0A 0D 0A 49 27 6D 20 6C 65 61 76 69 6E 67 |?....I'm leaving| 000029B0: 20 61 6C 6C 20 6F 66 20 74 68 69 73 20 75 70 20 | all of this up | 000029C0: 74 6F 20 74 68 65 20 6F 74 68 65 72 20 70 72 6F |to the other pro| 000029D0: 67 72 61 6D 6D 65 72 73 2E 20 20 49 66 20 0D 0A |grammers. If ..| 000029E0: 61 6E 79 6F 6E 65 20 6F 75 74 20 74 68 65 72 65 |anyone out there| 000029F0: 20 69 73 20 67 6F 6F 64 20 65 6E 6F 75 67 68 20 | is good enough | 00002A00: 74 6F 20 70 72 6F 67 72 61 6D 20 61 6E 20 61 70 |to program an ap| 00002A10: 70 6C 69 63 61 74 69 6F 6E 2C 0D 0A 69 74 20 73 |plication,..it s| 00002A20: 68 6F 75 6C 64 20 62 65 20 74 72 69 76 69 61 6C |hould be trivial| 00002A30: 20 74 6F 20 74 68 72 6F 77 20 74 6F 67 65 74 68 | to throw togeth| 00002A40: 65 72 20 61 20 6C 69 74 74 6C 65 20 66 6F 6E 74 |er a little font| 00002A50: 2C 20 70 75 74 0D 0A 61 20 74 69 6E 79 20 69 6E |, put..a tiny in| 00002A60: 74 65 72 72 75 70 74 20 69 6E 20 74 68 65 69 72 |terrupt in their| 00002A70: 20 70 72 6F 67 72 61 6D 2C 20 61 6E 64 20 70 72 | program, and pr| 00002A80: 6F 67 72 61 6D 20 74 68 65 69 72 20 73 63 72 65 |ogram their scre| 00002A90: 65 6E 0D 0A 66 75 6E 63 74 69 6F 6E 73 20 66 6F |en..functions fo| 00002AA0: 72 20 74 68 65 20 6E 65 77 20 73 63 72 65 65 6E |r the new screen| 00002AB0: 2E 20 20 4F 6E 65 20 73 68 6F 75 6C 64 20 61 6C |. One should al| 00002AC0: 73 6F 20 70 75 74 20 69 6E 20 0D 0A 70 72 6F 76 |so put in ..prov| 00002AD0: 69 73 69 6F 6E 73 20 74 6F 20 63 68 61 6E 67 65 |isions to change| 00002AE0: 20 74 68 65 20 73 63 72 65 65 6E 20 63 6F 6C 6F | the screen colo| 00002AF0: 72 73 2C 20 61 73 20 49 20 64 69 64 2C 20 62 75 |rs, as I did, bu| 00002B00: 74 20 70 6F 73 73 69 62 6C 79 20 0D 0A 77 69 74 |t possibly ..wit| 00002B10: 68 20 6D 6F 72 65 20 74 68 6F 75 67 68 74 2C 20 |h more thought, | 00002B20: 73 75 63 68 20 61 73 20 6F 6E 6C 79 20 63 79 63 |such as only cyc| 00002B30: 6C 69 6E 67 20 74 68 72 6F 75 67 68 20 67 72 61 |ling through gra| 00002B40: 79 20 73 63 61 6C 65 73 2E 0D 0A 0D 0A 49 20 77 |y scales.....I w| 00002B50: 61 73 20 67 6F 69 6E 67 20 74 6F 20 69 6E 63 6C |as going to incl| 00002B60: 75 64 65 20 73 6F 6D 65 20 41 53 43 49 49 20 61 |ude some ASCII a| 00002B70: 72 74 20 68 65 72 65 2C 20 62 75 74 20 49 20 64 |rt here, but I d| 00002B80: 6F 6E 27 74 0D 0A 63 61 72 65 20 74 6F 20 73 65 |on't..care to se| 00002B90: 65 20 68 6F 77 20 69 74 20 6C 6F 6F 6B 73 20 61 |e how it looks a| 00002BA0: 74 20 74 68 69 73 20 74 69 6D 65 2E 0D 0A 0D 0A |t this time.....| 00002BB0: 49 6E 20 63 6F 6E 63 6C 75 73 69 6F 6E 2C 20 72 |In conclusion, r| 00002BC0: 69 70 20 74 68 69 73 20 72 6F 75 74 69 6E 65 20 |ip this routine | 00002BD0: 61 6E 64 20 75 73 65 20 74 68 65 20 68 65 6C 6C |and use the hell| 00002BE0: 20 6F 75 74 20 6F 66 20 69 74 21 0D 0A 0D 0A E3 | out of it!.....| 00002BF0: 2E 24 77 72 61 70 E3 2E 28 0D 0A 0D 0A 0D 0A 0D |.$wrap..(.......| 00002C00: 0A 80 45 C7 00 20 |..E.. |
....N..2064 ><...X.4.....B..-.J... .F2N, ..1...HP..2I.P..H....HP.L....4U.4./****) ........./).. ".L...C.YX;?)./P..0`./ ".. -.-P...JP..E......P../.-./P..0.-P...JP.. . Q../ "..-.-P...JP.F9..0..9./.L". Q../. -./P..0.-P...JP.F9..L..,Z..7..X ..L..... ...,...../.-HD.P...-E..-..I... .JP.../E. ./.0I..0L........HP.N..N.....I.P.`;...K. .4096 POWDERERED TOAST...!..G..@."@.. ./ ``.`.``. P.`..@.2.. @...@ @.. P.@@..". . @% ...@. "@..%.`.`..%@@.@@.#@@..!.."@@.1 @@...`..P..`.@..@`...`.. @...`..`..`.. 0P...........`. @....`... .@/.`..`..`.` ..P. .@..@!@." .* @. @.@ ..#....9.@ . @..`.. @.@.`.....`.`...............`...% .`.. ../ ................).`.....`...!.. ."...@"....+.`.. ... ....#.......*..PP.. ...`..&`.......".`..4`0...... ..`..`..`. ..@..."`....`.....$.....`#.....!`.@*... @....`.@!`.(..@@ .`. &`.``...$.@@ .-`.P .P... P....!P..)P...P...P.*`...`. 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I CALL IT ..FLASH-80 BECAUSE I CAN'T THINK UP A CRYPTIC ACRONYM FOR IT. ..... ._. !.. $_ .. #I F. 'T H I S. #I S. %T O O. )H A R D... '/# /_\_. )|\_|/_ _/|. #T O. )R E A D ,. %T R Y. :T U R N I N G.. | |/O\O\. +/ / \/ \ \. %T H E . 1C O N T R A S T ,. #O R. 2U S E.. | \\_/_/. -/__|O||O|__ \. !A. 'M O N O. - M O N I T O R. .T H A T.. / |_. !|. /|/_ \_/\_/ _\ |. %H A S. !A. 'V E R Y. 7S T A T I C..| ||\_ ~|. %| | (._&) | ||. / D I S P L A Y .. %U S E. /F 1 - F 7 ..| .|# \/. #\/\._)/\__/ //. #T O. +C H A N G E. 2C O L O R S ...| .|!_. #(_/. ,| | .. \// |. !|. "||. `/IF YOU CAN READ THIS, THEN I GUESS YOU.. || |. !|. `7| |\ CARE HOW IT'S DONE. SIMPLY PUT, YOU ARE.. ||_ \. !\. `9//_/ SEEING TWO 40 -COLUMN SCREENS BEING INTER-.. \_| O|. !\._"//. `-LACED, MUCH LIKE AN OLD AMIG A'S 640X400.. /\._!/. `=__ || __|| SCRE EN IS REALLY A PAIR OF INTERLACD 640X200 .. / .|"__. !(._!(._`.) SCREENS. HOLD THE SHIFT KEY FOR A GLIMPSE... !(._#)_). A.AT WHAT'S REALLY HAPPENING.....PUSH R ETURN TO SCROLL DOWN ONE LINE, OR SPACE TO SCROLL DOWN ONE SCREEN.....GREETINGS TO STYLE, COOLHAND, XMIKEX, TRON, THE BO TS, BANZAI, ..BLOB, AND GROUPS LIKE F4C G, BYTERAPERS, ANYONE WHO STILL ..PROGRA MS NTSC, ETC. ETC. ETC.."...-M.....I KNO W WHAT YOU'RE THINKING. "THIS IS HARD A S HELL TO READ! THERE..ARE MILLIONS OF OTHER 80-COLUMN ROUTINES OUT THERE THAT WORK PERFECTLY ..WELL! WHY WOULD ANYONE WANT TO PUT UP WITH THIS?"....WELL, I'M GLAD YOU ASKED, BECAUSE IF FLASH-80 DID NOT HAVE ITS ADVANTAGES,..IT WOULD NOT HAVE BEEN DONE. MANY PEOPLE WHO SEE THI S CAN PROBABLY..TELL RIGHT AWAY THE ADVA NTAGES OF USING THIS KIND OF 80-COLUMN R OUTINE...(SKIP THROUGH THIS IF YOU LIKE, THERE'S SOME MORE ASCII ART AT THE END. )....AS YOU ALL KNOW, MOST COMMODORE 64' S HAVE ABOUT 64K OF MEMORY, OF WHICH ..A BOUT 57K (WILD GUESS) IS ACTUALLY USEFUL FOR STORING DATA. AS IT ..NORMALLY GOE S ON A REGULAR 40-COLUMN PROGRAM, 1K IS USED FOR MEMORY, AND ..THE REST IS USED FOR DATA, WHILE 1K OF THE VIDEO CHIP IS SET ASIDE JUST ..FOR COLOUR MEMORY, AND THE VIC CHIP QUIETLY TAKES ITS CHARACTER SET FROM ..ROM WHICH ISN'T EVEN READILY AVAILABLE TO THE 6510, SO YOU DON'T HAV E TO ..WORRY ABOUT IT. SO THE CBM'S STA NDARD SCREEN EDITOR USES A GRAND TOTAL . .OF 1K (2K IF YOU COUNT THE COLOUR MEMOR Y, WHICH ISN'T GOOD FOR ANYTHING ..ELSE ANYWAY), AND A FEW ZERO-PAGE REGISTERS.. ...BUT 80-COLUMN PROGRAMS EAT UP RESOURC ES LIKE NOBODY'S BUSINESS. STORING ..TH E FONT CAN TAKE ANYWHERE FROM 1K TO 4K O F MEMORY. THE SCREEN ITSELF ..IS THE BI G RESOURCE HOG. 8K OF MEMORY MUST BE AL LOCATED TO THE HI-RES ..SCREEN ITSELF. AND SINCE IT IS A HI-RES SCREEN, YOU CAN 'T USE THE 1K OF ..CHIP COLOUR MEMORY; Y OU HAVE TO ALLOCATE 1K OF PRECIOUS WORKS PACE TO ..COLOUR STORAGE WHILE THAT CHIP MEMORY GOES TO WASTE. SO NOW WE'RE USI NG ..ABOUT 10K OF MEMORY (OVER 15% OF YO UR COMMODORE'S TOTAL STORAGE) OR THE ..S CREEN. THIS SPELLS TROUBLE FOR TEXT EDI TORS, OR ANY PROGRAM WHICH ..MIGHT LIKE TO HAVE SOME BREATHING ROOM.....ANOTHER CONSIDERATION IS SPEED. TO DRAW A CHARA CTER ON AN 80-COLUMN ..SCREEN, AFTER CAL CULATING ITS POSITION, YOU HAVE TO FETCH AND PLOT EIGHT ..NYBBLES FROM YOUR FONT ONTO THE SCREEN. EIGHT. AS IF THIS, I N ITSELF, ..WEREN'T A HASSLE, THERE IS O FTEN WORK INVOLVING BIT SHIFTING AND ..M ULTIPLE SWEEPS OF BOOLEAN MATH ON EVERY BYTE. THIS SPELLS TROUBLE FOR ..HIGH-SP EED TERMINAL PROGRAMS LIKE NOVATERM..... WHAT MAKES FLASH-80 PREFERABLE IS THAT I T TAKES UP, PROBABLY, A MAXIMUM ..OF 6K, IF YOU WANTED TO HAVE SEPARATE UPPERCAS E AND LOWERCASE FONTS. IF ..YOU USE ONL Y ONE FONT, IT WILL ONLY TAKE 4K OF USAB LE MEMORY! AND IN ..THIS DEMO, SINCE I DIDN'T USE ANY REVERSE CHARACTERS, I'M U SING ONLY 3K ..OF MEMORY!....IT'S FASTER , TOO. INSTEAD OF HAVING TO MUCK AROUND WITH BIT SHIFTING OR ..INTENSE BOOLEAN MATH, I JUST FIND A SPOT ON THE SCREEN A ND POKE TO IT, ..ALMOST LIKE A NORMAL SC REEN. THE DIFFERENCE IS, IT'S REALLY TW O ..SCREENS, BUT THAT'S PRETTY EASY TO C OMPENSATE FOR. AS ONE CAN EASILY ..TELL , I HAVE TO STORE THE ODD-COLUMNED CHARA CTERS ON ONE SCREEN, AND THE ..EVEN-NUMB ERED CHARACTERS ON THE OTHER, BUT THE CA LCULATION FOR THAT IS ..JUST A FEW INSTR UCTIONS. SCROLLING AND CLEARING IS ALSO FASTER, SINCE ..THE MACHINE ONLY HAS TO MOVE OR CLEAR 2K OF MEMORY INSTEAD OF 8 K.....BE WARNED, IT IS INTERRUPT-DRIVEN. THE INTERRUPT IS A VERY FAST ONE, ..BU T IT MUST BE SET AT A RASTER-LINE. IT H AS TO EXECUTE EXACTLY 60 TIMES ..PER SEC OND TO REMAIN CONSISTENT, THOUGH ONE COU LD TRY IT WITH THE NORMAL..IRQ SYSTEM... ..HERE IS A MEMORY MAP OF WHAT I DID FOR THIS BEASTIE..$..... )0400-0800. `,SCRE EN 1 MEMORY A C E G I K M O Q S U W Y.. . )0801-08XX. `!BASIC PROGRAM-STARTER (S YS2063)... )0900-0C00. `!4X8 80-COLUMN F ONT (768 BYTES!)... &0C00-1.0. /SCREEN 2 MEMORY. D3B D F H J L N P R T V X Z.... (WARNING: THIS IS A VERY BORING PARAGRAP H) ..I COULD HAVE MADE A MORE EXTENSIVE FONT, WITH REVERSE CHARACTERS AND CBM .. GRAPHICS BUT I DECIDED TO GO ANOTHER WAY . I ONLY MAPPED THE LOW ASCII ..CHARACT ER SET, 96 CHARACTERS TOTAL, AND MAPPED THEM ACCORDING TO THEIR ..ACTUAL ASCII V ALUES SO I DIDN'T HAVE TO DO ANY BIT-SHU FFLING. (BOTH THE ..ATARI AND COMMODORE 8-BITS HAVE DIFFERENT ASCII CODES THAN S CREEN ..CODES! WHY IS THAT?!) DOING TH IS THE WAY I DID, I ACHIEVED SEVERAL ..T HINGS: FIRST, MY DISPLAY DRIVER WAS SIMP LIFIED A BIT; ALSO, I WAS ABLE ..TO EDIT THIS TEXT FILE USING MY 386. AND AS AN ADDED BONUS TO THESE ..LITTLE CONVENIEN CES, THE FONT TAKES UP 768 BYTES TOTAL, OUT OF THE 2048 ..MADE AVAILABLE TO ME. I WAS ABLE TO STORE MY FONT IN 0900-0BF F, LEAVING ..0800-0900 AVAILABLE FOR BAS IC AND/OR OTHER DATA, AND PUT THE SECOND ..SCREEN AT 0C00 WHERE THE REVERRSE CHA RACTERS WOULD NORMALLY BE. THIS ..LEAVE S HUGE AMOUNTS OF CONTIGUOUS MEMORY FOR ME TO ENJOY. I COULD HAVE ..PUT REVERSE CHARACTERS AT 0C00 AND MOVED SCREEN 2 U P TO 1.0N5, BUT I ..WASN'T GOING TO USE THEM, SO WHY BOTHER?....OKAY, THAT PARAG RAPH IS OVER. NOW WE NEED TO CONSIDER O UR OPTIONS: ..WHAT COULD WE DO TO, OR W ITH, THIS ROUTINE?....FLASH-80 HAS ALREA DY BEEN DONE ON THE ATARI 8-BIT WITH CLA Y HALIWELL'S ..FLICKERTERM-80. HE CAME UP WITH THE IDEA SOMETIME BEFORE I DID, BUT ..DIDN'T TELL ANYONE ASIDE FROM A MY STERIOUS MESSAGE IN A LOCAL ATARI ..BOAR D SAYING HE HAD AN IDEA FOR AN 80-COLUMN DRIVER THAT WAS AS FAST AS ..THE ATARI' S 40-COLUMN DRIVER, EVEN WHEN CLEARING A ND SCROLLING. I ..THOUGHT HE WAS GOING TO DO SOME TRICKS WITH DISPLAY LISTS (AN ATARI ..FEATURE I WON'T GO INTO) AND LE FT MY THOUGHTS. A WHILE LATER WHEN I WA S ..THINKING AND CAME UP WITH FLASH-80, I LEFT CLAY SOME MAIL ASKING IF THIS ..W AS HIS BRILLIANT NEW 80-COLUMN DRIVER'S MAIN IDEA. HE SAID IT WAS, AND ..HE WAS ACTUALLY ONLY A FEW WEEKS AWAY FROM REL EASING FLICKERTERM. I WAS ..RELIEVED TH AT THE IDEA WASN'T REAELLY MINE, SINCE I WOULD NEVER BE ABLE ..TO GET ANYONE TO PROGRAM SOMETHING USEFUL WITH FLASH-80, AND HALIWELL ..COULD ACTUALLY PROGRAM WE LL ENOUGH TO WRITE A TERMINAL PROGRAM WI TH IT. ..FLICKERTERM-80 IS ONE OF THE M ORE POPULAR VT-100 EMULATIONS AVAILABLE ..FOR THE ATARI, AND IS ALSO LESS BUGGY THAN MOST IMPLEMENTATIONS SO FAR ..(SINC E HALIWELL HAD THE DRIVE TO ACTUALLY PRO GRAM BEYOND THE FIRST ..VERSION!)....THE FACT THAT THIS HAS BEEN DONE FOR QUITE SOME TIME ON ANOTHER PLATFORM ..SUGGESTS THAT ANY PLATFORM WITH RASTER OR VERTIC AL BLANK INTERRUPTS ..COULD IMPLEMENT TH IS MODE. VIC-20 MACHINES COULD MANUFACT URE FLASH-40 ..OUT OF THIS, WHICH IS VER Y FORTUNATE DUE TO ITS CRAMPED MEMORY CO NDITIONS.....FIRST OF ALL, THE POSSIBILI TY OF REVERSE CHARACTERS IS REAL. JUST MAP ..THE CHARACTERS LIKE YOU NORMALLY W OULD, JUST USE THE FIRST 4 BITS. ..REVE RSE CHARACTERS WILL NOT BE POSSIBLE ON S YSTEMS WITH 128-CHARACTER ..FONTS LIKE T HE ATARI 8-BIT, BECAUSE A HARDWARE REVER SE CHARACTER WILL ..HANG OVER THE NEXT C HARACTER.....COLOR IS POSSIBLE, BUT IT D OESN'T LOOK VERY GOOD UNLESS YOU..STICK TO GRAYSCALE COLORS. ALSO, SINCE THE C6 4 CANNOT FLIP..BETWEEN COLOR PAGES AS IT CAN WITH SCREEN PAGES, COLOR..RESOLUTIO N WILL BE THE SAME AS NOVATERM'S (EVEN-N UMBERED..COLUMNS MUST BE THE SAME COLOR AS THEIR ODD-NUMBERED..NEIGHBOR). THEOR ETICALLY, ONE COULD KEEP TWO COLOR PAGES ..IN CONVENTIONAL MEMORY AND COPY EACH O NE TO COLOR MEMORY..ON EVERY FRAME, BUT WHO WOULD WANT TO? (THIS WOULD BE..UNNE CESSARY ON THE VIC-20, WHICH CAN FLIP CO LOR PAGES,..OR SO I'VE HEARD.)....APPLIC ATIONS OF FLASH-80 ARE INNUMERABLE. (I THINK THAT'S..A WORD?) IT HAS ALREADY B EEN IMPLEMENTED IN FLICKERTERM,..AS I HA VE MENTIONED. THE LOW MEMORY USAGE MAKE S IT PERFECT..FOR USE IN TEXT EDITORS, S PREADSHEETS, OR DATABASES. ONE COULD..P UT BOTH PETSCII SETS IN AND REPLACE THE SCREEN EDITOR WITH IT,..ALLOWING ONE TO PROGRAM IN BASIC IN 80 COLUMNS, NOT UNLI KE..COMPUTE!'S SCREEN-80 PROGRAM. IT WO ULD BE EVEN MORE USEFUL..AS A CRT DEVICE FOR OTHER PROGRAMMING LANGUAGES. WOULD N'T..C PROGRAMS BE EASIER TO PORT TO AN 80 COLUMN SCREEN?....I'M LEAVING ALL OF THIS UP TO THE OTHER PROGRAMMERS. IF .. ANYONE OUT THERE IS GOOD ENOUGH TO PROGR AM AN APPLICATION,..IT SHOULD BE TRIVIAL TO THROW TOGETHER A LITTLE FONT, PUT..A TINY INTERRUPT IN THEIR PROGRAM, AND PR OGRAM THEIR SCREEN..FUNCTIONS FOR THE NE W SCREEN. ONE SHOULD ALSO PUT IN ..PROV ISIONS TO CHANGE THE SCREEN COLORS, AS I DID, BUT POSSIBLY ..WITH MORE THOUGHT, SUCH AS ONLY CYCLING THROUGH GRAY SCALES .....I WAS GOING TO INCLUDE SOME ASCII A RT HERE, BUT I DON'T..CARE TO SEE HOW IT LOOKS AT THIS TIME.....IN CONCLUSION, R IP THIS ROUTINE AND USE THE HELL OUT OF IT!......$WRAP..(.........EG.
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