Apple-2-SW
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IIcSystemClock
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disasm wip

This commit is contained in:
Joshua Bell 2020-10-13 20:39:31 -07:00
parent 0a72666c6a
commit 08990af793
1 changed files with 24 additions and 13 deletions
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37
clock.system.s
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@ -7,8 +7,11 @@
.setcpu "65C02"
;;; TODO: Identify 4 different clock drivers.
;;; * IIc System Clock
;;; * IIc System Clock (via Serial or Printer port)
;;; * Seiko DataGraph (via IIe Gameport)
;;; * Seiko DataGraph (via IIc Serial)
;;; * ???
;;; See https://www.applefritter.com/node/176 for some details
.enum MessageCode
kInstall = 0
kNoSysFile = 1
@ -235,19 +238,20 @@ assign: and #%01110000 ; slot
;;; flags mach_type Version
;;; ...00 0 Patch2 IIc
;;; ...01 0 Patch0 IIc Seiko
;;; ...10 0 Patch0 IIc Seiko
;;; ...11 0 Patch0 IIc Seiko
;;; ...00 1 Patch1 IIe Seiko
;;; ...01 1 Patch3 IIe Seiko
;;; ...10 1 Patch0 IIe Seiko
;;; ...11 1 Patch0 IIe Seiko
;;; ...01 0 Patch0 IIc Seiko DataGraph
;;; ...10 0 Patch0 IIc Seiko DataGraph
;;; ...11 0 Patch0 IIc Seiko DataGraph
;;; ...00 1 Patch1 IIe Seiko DataGraph
;;; ...01 1 Patch3 IIe Seiko DataGraph
;;; ...10 1 Patch0 IIe Seiko DataGraph
;;; ...11 1 Patch0 IIe Seiko DataGraph
;;; Patch0 - (default) SSC in either Slot 1 or Slot 2
;;; Patch1 -
;;; Patch0 - (default) IIc System Clock - SSC in either Slot 1 or Slot 2
;;; Patch1 - Seiko DataGraph in Gameport ???
;;; Patch2 - SSC in Slot 2, COMMAND not restored
;;; Patch3 -
;;; Patch3 - Seiko DataGraph in Gameport ???
lda flags
and #%00000011
@ -565,6 +569,7 @@ patch_target:
kPatchLength = $38
.proc Patch0
;;; Driver for IIc System Clock (via either Port 2 or Port 1)
acia_command_patch1 := * + 1
;; ------------------------------
@ -724,11 +729,13 @@ Patches:
;;; ============================================================
;;; Patch 1:
;;;
;;; Driver for Seiko DataGraph via IIe Gameport
.proc Patch1
;; Trigger reading
firmware_byte := * + 1
lda $C0E0 ; Set to $C0x0, n=slot+8
lda $C0E0 ; Set to $C0x0, n=slot+8 - Disk II PHASE0 ???
lda CLRAN1
ldy #1
@ -778,6 +785,8 @@ read_register:
;;; ============================================================
;;; Patch 2:
;;;
;;; Driver for Seiko DataGraph via IIc Serial Communication Port (???)
.proc Patch2
lda PORT2_ACIA_COMMAND ; unused
@ -837,6 +846,8 @@ read_status:
;;; ============================================================
;;; Patch 3:
;;;
;;; Driver for Seiko Datagraph via IIe Gameport (different model ???)
.proc Patch3
;; Trigger reading